./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 e19ca921 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-e19ca92 [2021-12-22 08:33:48,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:33:48,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:33:48,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:33:48,463 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:33:48,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:33:48,464 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:33:48,465 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:33:48,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:33:48,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:33:48,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:33:48,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:33:48,468 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:33:48,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:33:48,470 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:33:48,471 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:33:48,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:33:48,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:33:48,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:33:48,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:33:48,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:33:48,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:33:48,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:33:48,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:33:48,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:33:48,487 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:33:48,487 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:33:48,488 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:33:48,488 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:33:48,489 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:33:48,489 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:33:48,490 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:33:48,491 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:33:48,492 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:33:48,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:33:48,493 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:33:48,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:33:48,494 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:33:48,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:33:48,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:33:48,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:33:48,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:33:48,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:33:48,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:33:48,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:33:48,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:33:48,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:33:48,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:33:48,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:33:48,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:33:48,512 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:33:48,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:33:48,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:33:48,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:33:48,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:33:48,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:33:48,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:33:48,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:33:48,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:33:48,513 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:33:48,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:33:48,514 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:33:48,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:33:48,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:33:48,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:33:48,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:33:48,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:33:48,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:33:48,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:33:48,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:33:48,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:33:48,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:33:48,516 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:33:48,516 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:33:48,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:33:48,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:33:48,517 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 75fd132a1a39ad1f2927845122893235fdf65fe2225472c79a2e84525dcd60fe [2021-12-22 08:33:48,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:33:48,753 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:33:48,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:33:48,756 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:33:48,756 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:33:48,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2021-12-22 08:33:48,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61d6ad12/35ac137238024acc8acf239cd17858ca/FLAG99c01b57c [2021-12-22 08:33:49,211 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:33:49,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers-simplified/cdaudio_simpl1.cil-2.c [2021-12-22 08:33:49,221 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61d6ad12/35ac137238024acc8acf239cd17858ca/FLAG99c01b57c [2021-12-22 08:33:49,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f61d6ad12/35ac137238024acc8acf239cd17858ca [2021-12-22 08:33:49,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:33:49,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:33:49,548 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:33:49,548 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:33:49,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:33:49,550 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:49,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a241ec5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49, skipping insertion in model container [2021-12-22 08:33:49,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:49,555 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:33:49,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:33:49,759 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] [2021-12-22 08:33:49,858 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:33:49,863 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:33:49,872 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] [2021-12-22 08:33:49,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:33:49,938 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:33:49,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49 WrapperNode [2021-12-22 08:33:49,939 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:33:49,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:33:49,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:33:49,940 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:33:49,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:49,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,025 INFO L137 Inliner]: procedures = 41, calls = 107, calls flagged for inlining = 16, calls inlined = 16, statements flattened = 1581 [2021-12-22 08:33:50,026 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:33:50,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:33:50,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:33:50,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:33:50,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,044 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,094 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:33:50,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:33:50,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:33:50,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:33:50,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (1/1) ... [2021-12-22 08:33:50,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:33:50,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:50,149 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) [2021-12-22 08:33:50,173 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 [2021-12-22 08:33:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure SendSrbSynchronous [2021-12-22 08:33:50,196 INFO L138 BoogieDeclarations]: Found implementation of procedure SendSrbSynchronous [2021-12-22 08:33:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:33:50,196 INFO L130 BoogieDeclarations]: Found specification of procedure AG_SetStatusAndReturn [2021-12-22 08:33:50,197 INFO L138 BoogieDeclarations]: Found implementation of procedure AG_SetStatusAndReturn [2021-12-22 08:33:50,197 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-22 08:33:50,197 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-22 08:33:50,197 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioIsPlayActive [2021-12-22 08:33:50,197 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioIsPlayActive [2021-12-22 08:33:50,197 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-22 08:33:50,210 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-22 08:33:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-22 08:33:50,210 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-22 08:33:50,210 INFO L130 BoogieDeclarations]: Found specification of procedure HPCdrCompletion [2021-12-22 08:33:50,210 INFO L138 BoogieDeclarations]: Found implementation of procedure HPCdrCompletion [2021-12-22 08:33:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure KeSetEvent [2021-12-22 08:33:50,211 INFO L138 BoogieDeclarations]: Found implementation of procedure KeSetEvent [2021-12-22 08:33:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSignalCompletion [2021-12-22 08:33:50,211 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSignalCompletion [2021-12-22 08:33:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-22 08:33:50,211 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-22 08:33:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:33:50,211 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-22 08:33:50,212 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-22 08:33:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioSendToNextDriver [2021-12-22 08:33:50,212 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioSendToNextDriver [2021-12-22 08:33:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:33:50,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:33:50,212 INFO L130 BoogieDeclarations]: Found specification of procedure CdAudioForwardIrpSynchronous [2021-12-22 08:33:50,212 INFO L138 BoogieDeclarations]: Found implementation of procedure CdAudioForwardIrpSynchronous [2021-12-22 08:33:50,405 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:33:50,406 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:33:50,535 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:50,591 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##21: assume !false; [2021-12-22 08:33:50,592 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume false; [2021-12-22 08:33:50,646 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:50,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-22 08:33:50,662 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-22 08:33:50,667 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:50,667 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:50,669 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:50,675 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:50,683 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:50,693 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:50,696 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:33:51,123 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint L305: CdAudioPnp_#res#1 := 0; [2021-12-22 08:33:51,123 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##258: assume !false; [2021-12-22 08:33:51,123 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##257: assume false; [2021-12-22 08:33:51,123 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##286: assume !false; [2021-12-22 08:33:51,123 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##285: assume false; [2021-12-22 08:33:51,123 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume !false; [2021-12-22 08:33:51,124 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##46: assume false; [2021-12-22 08:33:51,124 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##133: assume false; [2021-12-22 08:33:51,124 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##134: assume !false; [2021-12-22 08:33:51,124 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##25: assume !false; [2021-12-22 08:33:51,124 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume false; [2021-12-22 08:33:51,124 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume !false; [2021-12-22 08:33:51,124 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##14: assume false; [2021-12-22 08:33:51,125 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##331: assume false; [2021-12-22 08:33:51,125 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##332: assume !false; [2021-12-22 08:33:51,145 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:33:51,152 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:33:51,153 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 08:33:51,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:51 BoogieIcfgContainer [2021-12-22 08:33:51,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:33:51,156 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:33:51,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:33:51,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:33:51,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:33:49" (1/3) ... [2021-12-22 08:33:51,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7d8269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:51, skipping insertion in model container [2021-12-22 08:33:51,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:49" (2/3) ... [2021-12-22 08:33:51,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7d8269 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:51, skipping insertion in model container [2021-12-22 08:33:51,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:51" (3/3) ... [2021-12-22 08:33:51,160 INFO L111 eAbstractionObserver]: Analyzing ICFG cdaudio_simpl1.cil-2.c [2021-12-22 08:33:51,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:33:51,164 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:33:51,208 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:33:51,221 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 [2021-12-22 08:33:51,222 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:33:51,239 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) [2021-12-22 08:33:51,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 08:33:51,243 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:51,243 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:51,244 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:51,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:51,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1469618272, now seen corresponding path program 1 times [2021-12-22 08:33:51,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:51,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044862603] [2021-12-22 08:33:51,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:51,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:51,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:51,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044862603] [2021-12-22 08:33:51,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044862603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:51,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:51,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:33:51,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637611266] [2021-12-22 08:33:51,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:51,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:33:51,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:51,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:33:51,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:33:51,405 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) [2021-12-22 08:33:51,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:51,507 INFO L93 Difference]: Finished difference Result 809 states and 1294 transitions. [2021-12-22 08:33:51,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:33:51,509 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 [2021-12-22 08:33:51,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:51,519 INFO L225 Difference]: With dead ends: 809 [2021-12-22 08:33:51,519 INFO L226 Difference]: Without dead ends: 461 [2021-12-22 08:33:51,523 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 [2021-12-22 08:33:51,526 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 [2021-12-22 08:33:51,526 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] [2021-12-22 08:33:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-12-22 08:33:51,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 461. [2021-12-22 08:33:51,575 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) [2021-12-22 08:33:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 691 transitions. [2021-12-22 08:33:51,579 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 691 transitions. Word has length 13 [2021-12-22 08:33:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:51,580 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 691 transitions. [2021-12-22 08:33:51,580 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) [2021-12-22 08:33:51,580 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 691 transitions. [2021-12-22 08:33:51,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 08:33:51,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:51,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:51,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:33:51,581 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:51,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1712840026, now seen corresponding path program 1 times [2021-12-22 08:33:51,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:51,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79704150] [2021-12-22 08:33:51,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:51,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:51,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:51,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:51,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:51,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79704150] [2021-12-22 08:33:51,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79704150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:51,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:51,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:33:51,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340501289] [2021-12-22 08:33:51,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:51,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:33:51,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:51,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:33:51,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:33:51,625 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) [2021-12-22 08:33:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:51,753 INFO L93 Difference]: Finished difference Result 702 states and 1030 transitions. [2021-12-22 08:33:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:33:51,753 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 [2021-12-22 08:33:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:51,758 INFO L225 Difference]: With dead ends: 702 [2021-12-22 08:33:51,758 INFO L226 Difference]: Without dead ends: 597 [2021-12-22 08:33:51,759 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 [2021-12-22 08:33:51,760 INFO L933 BasicCegarLoop]: 812 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, 1036 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 [2021-12-22 08:33:51,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [566 Valid, 1036 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-12-22 08:33:51,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 579. [2021-12-22 08:33:51,783 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) [2021-12-22 08:33:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 858 transitions. [2021-12-22 08:33:51,786 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 858 transitions. Word has length 15 [2021-12-22 08:33:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:51,786 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 858 transitions. [2021-12-22 08:33:51,786 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) [2021-12-22 08:33:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 858 transitions. [2021-12-22 08:33:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-22 08:33:51,788 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:51,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:51,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:33:51,788 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:51,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1723202730, now seen corresponding path program 1 times [2021-12-22 08:33:51,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:51,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66612059] [2021-12-22 08:33:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:51,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:51,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:51,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66612059] [2021-12-22 08:33:51,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66612059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:51,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:51,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:33:51,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059355799] [2021-12-22 08:33:51,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:51,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:33:51,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:51,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:33:51,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:33:51,837 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) [2021-12-22 08:33:51,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:51,863 INFO L93 Difference]: Finished difference Result 858 states and 1241 transitions. [2021-12-22 08:33:51,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:33:51,864 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 [2021-12-22 08:33:51,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:51,867 INFO L225 Difference]: With dead ends: 858 [2021-12-22 08:33:51,867 INFO L226 Difference]: Without dead ends: 723 [2021-12-22 08:33:51,868 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 [2021-12-22 08:33:51,869 INFO L933 BasicCegarLoop]: 681 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, 868 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 [2021-12-22 08:33:51,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 868 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-12-22 08:33:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 687. [2021-12-22 08:33:51,899 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) [2021-12-22 08:33:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 1011 transitions. [2021-12-22 08:33:51,902 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 1011 transitions. Word has length 19 [2021-12-22 08:33:51,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:51,903 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 1011 transitions. [2021-12-22 08:33:51,903 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) [2021-12-22 08:33:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 1011 transitions. [2021-12-22 08:33:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 08:33:51,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:51,905 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] [2021-12-22 08:33:51,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 08:33:51,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:51,906 INFO L85 PathProgramCache]: Analyzing trace with hash 981092466, now seen corresponding path program 1 times [2021-12-22 08:33:51,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:51,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514627034] [2021-12-22 08:33:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:51,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:51,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:51,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:51,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514627034] [2021-12-22 08:33:51,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514627034] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:51,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:51,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:33:51,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90071909] [2021-12-22 08:33:51,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:51,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:33:51,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:51,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:33:51,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:33:51,956 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) [2021-12-22 08:33:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:52,117 INFO L93 Difference]: Finished difference Result 1290 states and 1958 transitions. [2021-12-22 08:33:52,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:33:52,118 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 [2021-12-22 08:33:52,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:52,127 INFO L225 Difference]: With dead ends: 1290 [2021-12-22 08:33:52,127 INFO L226 Difference]: Without dead ends: 1057 [2021-12-22 08:33:52,129 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 [2021-12-22 08:33:52,138 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 [2021-12-22 08:33:52,140 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] [2021-12-22 08:33:52,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-12-22 08:33:52,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 819. [2021-12-22 08:33:52,182 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) [2021-12-22 08:33:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1243 transitions. [2021-12-22 08:33:52,187 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1243 transitions. Word has length 21 [2021-12-22 08:33:52,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:52,188 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1243 transitions. [2021-12-22 08:33:52,191 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) [2021-12-22 08:33:52,192 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1243 transitions. [2021-12-22 08:33:52,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 08:33:52,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:52,198 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] [2021-12-22 08:33:52,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 08:33:52,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:52,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:52,201 INFO L85 PathProgramCache]: Analyzing trace with hash 110549048, now seen corresponding path program 1 times [2021-12-22 08:33:52,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:52,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375331898] [2021-12-22 08:33:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:52,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:52,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:52,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:52,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375331898] [2021-12-22 08:33:52,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375331898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:52,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:52,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:52,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240688748] [2021-12-22 08:33:52,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:52,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:52,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:52,317 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) [2021-12-22 08:33:52,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:52,611 INFO L93 Difference]: Finished difference Result 1372 states and 2088 transitions. [2021-12-22 08:33:52,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:33:52,611 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 [2021-12-22 08:33:52,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:52,615 INFO L225 Difference]: With dead ends: 1372 [2021-12-22 08:33:52,615 INFO L226 Difference]: Without dead ends: 829 [2021-12-22 08:33:52,616 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 [2021-12-22 08:33:52,617 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:52,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1027 Valid, 870 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:33:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2021-12-22 08:33:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 807. [2021-12-22 08:33:52,639 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) [2021-12-22 08:33:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1219 transitions. [2021-12-22 08:33:52,642 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1219 transitions. Word has length 22 [2021-12-22 08:33:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:52,642 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1219 transitions. [2021-12-22 08:33:52,642 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) [2021-12-22 08:33:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1219 transitions. [2021-12-22 08:33:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-22 08:33:52,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:52,644 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] [2021-12-22 08:33:52,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 08:33:52,644 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash -401986644, now seen corresponding path program 1 times [2021-12-22 08:33:52,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:52,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234889506] [2021-12-22 08:33:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:52,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:52,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:52,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234889506] [2021-12-22 08:33:52,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234889506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:52,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:52,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:33:52,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445661186] [2021-12-22 08:33:52,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:52,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:33:52,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:52,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:33:52,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:33:52,668 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) [2021-12-22 08:33:52,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:52,716 INFO L93 Difference]: Finished difference Result 810 states and 1221 transitions. [2021-12-22 08:33:52,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:33:52,717 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 [2021-12-22 08:33:52,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:52,719 INFO L225 Difference]: With dead ends: 810 [2021-12-22 08:33:52,720 INFO L226 Difference]: Without dead ends: 806 [2021-12-22 08:33:52,720 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 [2021-12-22 08:33:52,720 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 [2021-12-22 08:33:52,721 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] [2021-12-22 08:33:52,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-12-22 08:33:52,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 806. [2021-12-22 08:33:52,747 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) [2021-12-22 08:33:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1216 transitions. [2021-12-22 08:33:52,750 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1216 transitions. Word has length 23 [2021-12-22 08:33:52,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:52,750 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1216 transitions. [2021-12-22 08:33:52,750 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) [2021-12-22 08:33:52,750 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1216 transitions. [2021-12-22 08:33:52,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:33:52,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:52,752 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] [2021-12-22 08:33:52,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 08:33:52,752 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:52,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:52,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1420935661, now seen corresponding path program 1 times [2021-12-22 08:33:52,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:52,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119705068] [2021-12-22 08:33:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:52,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:52,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:52,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:52,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119705068] [2021-12-22 08:33:52,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119705068] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:52,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:52,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:52,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387715458] [2021-12-22 08:33:52,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:52,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:52,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:52,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:52,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:52,782 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) [2021-12-22 08:33:52,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:52,858 INFO L93 Difference]: Finished difference Result 1220 states and 1776 transitions. [2021-12-22 08:33:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:33:52,858 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 [2021-12-22 08:33:52,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:52,862 INFO L225 Difference]: With dead ends: 1220 [2021-12-22 08:33:52,862 INFO L226 Difference]: Without dead ends: 806 [2021-12-22 08:33:52,863 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 [2021-12-22 08:33:52,863 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, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:52,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 1941 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:52,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2021-12-22 08:33:52,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 681. [2021-12-22 08:33:52,882 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) [2021-12-22 08:33:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 984 transitions. [2021-12-22 08:33:52,884 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 984 transitions. Word has length 28 [2021-12-22 08:33:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:52,884 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 984 transitions. [2021-12-22 08:33:52,884 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) [2021-12-22 08:33:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 984 transitions. [2021-12-22 08:33:52,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-22 08:33:52,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:52,886 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] [2021-12-22 08:33:52,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 08:33:52,886 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:52,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1565251403, now seen corresponding path program 1 times [2021-12-22 08:33:52,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:52,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616063403] [2021-12-22 08:33:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:52,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:52,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:52,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:52,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616063403] [2021-12-22 08:33:52,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616063403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:52,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:52,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:33:52,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569911656] [2021-12-22 08:33:52,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:52,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:33:52,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:52,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:33:52,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:33:52,913 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) [2021-12-22 08:33:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:52,942 INFO L93 Difference]: Finished difference Result 764 states and 1091 transitions. [2021-12-22 08:33:52,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:33:52,943 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 [2021-12-22 08:33:52,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:52,946 INFO L225 Difference]: With dead ends: 764 [2021-12-22 08:33:52,946 INFO L226 Difference]: Without dead ends: 746 [2021-12-22 08:33:52,946 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 [2021-12-22 08:33:52,947 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 [2021-12-22 08:33:52,947 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] [2021-12-22 08:33:52,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-22 08:33:52,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 703. [2021-12-22 08:33:52,966 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) [2021-12-22 08:33:52,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 1012 transitions. [2021-12-22 08:33:52,971 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 1012 transitions. Word has length 29 [2021-12-22 08:33:52,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:52,972 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 1012 transitions. [2021-12-22 08:33:52,972 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) [2021-12-22 08:33:52,972 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 1012 transitions. [2021-12-22 08:33:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 08:33:52,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:52,974 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] [2021-12-22 08:33:52,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 08:33:52,974 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:52,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:52,975 INFO L85 PathProgramCache]: Analyzing trace with hash 18714975, now seen corresponding path program 1 times [2021-12-22 08:33:52,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:52,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327430009] [2021-12-22 08:33:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:52,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:53,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 08:33:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:53,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:53,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327430009] [2021-12-22 08:33:53,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327430009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:53,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:53,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:53,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569960823] [2021-12-22 08:33:53,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:53,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:53,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:53,013 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) [2021-12-22 08:33:53,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:53,196 INFO L93 Difference]: Finished difference Result 999 states and 1443 transitions. [2021-12-22 08:33:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:33:53,196 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 [2021-12-22 08:33:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:53,199 INFO L225 Difference]: With dead ends: 999 [2021-12-22 08:33:53,199 INFO L226 Difference]: Without dead ends: 772 [2021-12-22 08:33:53,200 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 [2021-12-22 08:33:53,201 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:53,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 1774 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:53,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-12-22 08:33:53,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 686. [2021-12-22 08:33:53,219 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) [2021-12-22 08:33:53,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 983 transitions. [2021-12-22 08:33:53,221 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 983 transitions. Word has length 35 [2021-12-22 08:33:53,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:53,222 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 983 transitions. [2021-12-22 08:33:53,222 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) [2021-12-22 08:33:53,222 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 983 transitions. [2021-12-22 08:33:53,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 08:33:53,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:53,223 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] [2021-12-22 08:33:53,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 08:33:53,224 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:53,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1008894227, now seen corresponding path program 1 times [2021-12-22 08:33:53,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:53,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351734338] [2021-12-22 08:33:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:53,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:53,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:53,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:53,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351734338] [2021-12-22 08:33:53,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351734338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:53,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:53,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:53,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368669216] [2021-12-22 08:33:53,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:53,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:53,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:53,247 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) [2021-12-22 08:33:53,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:53,440 INFO L93 Difference]: Finished difference Result 744 states and 1056 transitions. [2021-12-22 08:33:53,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:33:53,440 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 [2021-12-22 08:33:53,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:53,443 INFO L225 Difference]: With dead ends: 744 [2021-12-22 08:33:53,443 INFO L226 Difference]: Without dead ends: 702 [2021-12-22 08:33:53,443 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 [2021-12-22 08:33:53,444 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 [2021-12-22 08:33:53,444 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] [2021-12-22 08:33:53,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-12-22 08:33:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 686. [2021-12-22 08:33:53,477 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) [2021-12-22 08:33:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 981 transitions. [2021-12-22 08:33:53,479 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 981 transitions. Word has length 32 [2021-12-22 08:33:53,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:53,480 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 981 transitions. [2021-12-22 08:33:53,480 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) [2021-12-22 08:33:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 981 transitions. [2021-12-22 08:33:53,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-22 08:33:53,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:53,482 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] [2021-12-22 08:33:53,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 08:33:53,482 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1838861437, now seen corresponding path program 1 times [2021-12-22 08:33:53,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:53,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142483340] [2021-12-22 08:33:53,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:53,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:53,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 08:33:53,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:53,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:53,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142483340] [2021-12-22 08:33:53,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142483340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:53,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:53,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:53,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725289384] [2021-12-22 08:33:53,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:53,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:53,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:53,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:53,511 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) [2021-12-22 08:33:53,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:53,681 INFO L93 Difference]: Finished difference Result 771 states and 1109 transitions. [2021-12-22 08:33:53,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:33:53,682 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 [2021-12-22 08:33:53,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:53,684 INFO L225 Difference]: With dead ends: 771 [2021-12-22 08:33:53,684 INFO L226 Difference]: Without dead ends: 711 [2021-12-22 08:33:53,685 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 [2021-12-22 08:33:53,685 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 [2021-12-22 08:33:53,685 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] [2021-12-22 08:33:53,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-12-22 08:33:53,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 675. [2021-12-22 08:33:53,703 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) [2021-12-22 08:33:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 968 transitions. [2021-12-22 08:33:53,705 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 968 transitions. Word has length 36 [2021-12-22 08:33:53,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:53,706 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 968 transitions. [2021-12-22 08:33:53,706 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) [2021-12-22 08:33:53,706 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 968 transitions. [2021-12-22 08:33:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 08:33:53,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:53,707 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] [2021-12-22 08:33:53,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 08:33:53,708 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:53,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:53,708 INFO L85 PathProgramCache]: Analyzing trace with hash 138801832, now seen corresponding path program 1 times [2021-12-22 08:33:53,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:53,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295793389] [2021-12-22 08:33:53,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:53,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:53,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:53,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295793389] [2021-12-22 08:33:53,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295793389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:53,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:53,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:33:53,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801660216] [2021-12-22 08:33:53,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:53,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:33:53,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:33:53,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:33:53,729 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) [2021-12-22 08:33:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:53,791 INFO L93 Difference]: Finished difference Result 832 states and 1184 transitions. [2021-12-22 08:33:53,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:33:53,791 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 [2021-12-22 08:33:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:53,794 INFO L225 Difference]: With dead ends: 832 [2021-12-22 08:33:53,794 INFO L226 Difference]: Without dead ends: 821 [2021-12-22 08:33:53,795 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 [2021-12-22 08:33:53,795 INFO L933 BasicCegarLoop]: 756 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, 1369 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 [2021-12-22 08:33:53,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 1369 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:53,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-12-22 08:33:53,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 723. [2021-12-22 08:33:53,817 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) [2021-12-22 08:33:53,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1027 transitions. [2021-12-22 08:33:53,820 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1027 transitions. Word has length 34 [2021-12-22 08:33:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:53,820 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1027 transitions. [2021-12-22 08:33:53,820 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) [2021-12-22 08:33:53,820 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1027 transitions. [2021-12-22 08:33:53,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 08:33:53,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:53,822 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] [2021-12-22 08:33:53,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 08:33:53,822 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:53,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:53,822 INFO L85 PathProgramCache]: Analyzing trace with hash -298326298, now seen corresponding path program 1 times [2021-12-22 08:33:53,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:53,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97812161] [2021-12-22 08:33:53,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:53,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:53,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97812161] [2021-12-22 08:33:53,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97812161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:53,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:53,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:53,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496318520] [2021-12-22 08:33:53,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:53,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:53,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:53,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:53,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:53,856 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) [2021-12-22 08:33:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:54,057 INFO L93 Difference]: Finished difference Result 751 states and 1058 transitions. [2021-12-22 08:33:54,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:33:54,058 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 [2021-12-22 08:33:54,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:54,060 INFO L225 Difference]: With dead ends: 751 [2021-12-22 08:33:54,060 INFO L226 Difference]: Without dead ends: 704 [2021-12-22 08:33:54,061 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 [2021-12-22 08:33:54,061 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 [2021-12-22 08:33:54,061 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] [2021-12-22 08:33:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-22 08:33:54,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 694. [2021-12-22 08:33:54,082 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) [2021-12-22 08:33:54,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 983 transitions. [2021-12-22 08:33:54,084 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 983 transitions. Word has length 34 [2021-12-22 08:33:54,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:54,085 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 983 transitions. [2021-12-22 08:33:54,085 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) [2021-12-22 08:33:54,085 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 983 transitions. [2021-12-22 08:33:54,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 08:33:54,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:54,086 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] [2021-12-22 08:33:54,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 08:33:54,087 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:54,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:54,087 INFO L85 PathProgramCache]: Analyzing trace with hash 452395434, now seen corresponding path program 1 times [2021-12-22 08:33:54,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:54,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291772085] [2021-12-22 08:33:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:54,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:54,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:54,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291772085] [2021-12-22 08:33:54,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291772085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:54,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:54,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:54,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703932755] [2021-12-22 08:33:54,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:54,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:54,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:54,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:54,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:54,121 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) [2021-12-22 08:33:54,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:54,352 INFO L93 Difference]: Finished difference Result 792 states and 1125 transitions. [2021-12-22 08:33:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:33:54,352 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 [2021-12-22 08:33:54,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:54,355 INFO L225 Difference]: With dead ends: 792 [2021-12-22 08:33:54,355 INFO L226 Difference]: Without dead ends: 788 [2021-12-22 08:33:54,356 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 [2021-12-22 08:33:54,356 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 741 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:54,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 1192 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:33:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-12-22 08:33:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 696. [2021-12-22 08:33:54,386 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) [2021-12-22 08:33:54,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 985 transitions. [2021-12-22 08:33:54,388 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 985 transitions. Word has length 35 [2021-12-22 08:33:54,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:54,389 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 985 transitions. [2021-12-22 08:33:54,389 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) [2021-12-22 08:33:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 985 transitions. [2021-12-22 08:33:54,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 08:33:54,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:54,390 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:54,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 08:33:54,391 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:54,391 INFO L85 PathProgramCache]: Analyzing trace with hash 452672264, now seen corresponding path program 1 times [2021-12-22 08:33:54,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:54,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337110516] [2021-12-22 08:33:54,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:54,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:54,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:54,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:54,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337110516] [2021-12-22 08:33:54,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337110516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:54,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:54,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:33:54,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816962293] [2021-12-22 08:33:54,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:54,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:33:54,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:54,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:33:54,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:33:54,418 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) [2021-12-22 08:33:54,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:54,490 INFO L93 Difference]: Finished difference Result 709 states and 998 transitions. [2021-12-22 08:33:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:33:54,491 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 [2021-12-22 08:33:54,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:54,493 INFO L225 Difference]: With dead ends: 709 [2021-12-22 08:33:54,493 INFO L226 Difference]: Without dead ends: 679 [2021-12-22 08:33:54,494 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 [2021-12-22 08:33:54,494 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 [2021-12-22 08:33:54,494 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] [2021-12-22 08:33:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-12-22 08:33:54,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 679. [2021-12-22 08:33:54,519 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) [2021-12-22 08:33:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 965 transitions. [2021-12-22 08:33:54,521 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 965 transitions. Word has length 35 [2021-12-22 08:33:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:54,521 INFO L470 AbstractCegarLoop]: Abstraction has 679 states and 965 transitions. [2021-12-22 08:33:54,521 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) [2021-12-22 08:33:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 965 transitions. [2021-12-22 08:33:54,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 08:33:54,523 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:54,523 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:33:54,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 08:33:54,523 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:54,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1733603893, now seen corresponding path program 1 times [2021-12-22 08:33:54,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:54,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180968243] [2021-12-22 08:33:54,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:54,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:54,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 08:33:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:54,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:54,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180968243] [2021-12-22 08:33:54,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180968243] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:54,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:54,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:54,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289696312] [2021-12-22 08:33:54,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:54,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:54,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:54,548 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) [2021-12-22 08:33:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:54,735 INFO L93 Difference]: Finished difference Result 717 states and 1030 transitions. [2021-12-22 08:33:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:33:54,736 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 [2021-12-22 08:33:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:54,739 INFO L225 Difference]: With dead ends: 717 [2021-12-22 08:33:54,739 INFO L226 Difference]: Without dead ends: 710 [2021-12-22 08:33:54,739 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 [2021-12-22 08:33:54,740 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:54,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1540 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-22 08:33:54,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2021-12-22 08:33:54,769 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) [2021-12-22 08:33:54,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 980 transitions. [2021-12-22 08:33:54,771 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 980 transitions. Word has length 37 [2021-12-22 08:33:54,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:54,771 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 980 transitions. [2021-12-22 08:33:54,772 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) [2021-12-22 08:33:54,772 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 980 transitions. [2021-12-22 08:33:54,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-22 08:33:54,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:54,773 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] [2021-12-22 08:33:54,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 08:33:54,773 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:54,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:54,774 INFO L85 PathProgramCache]: Analyzing trace with hash -190291046, now seen corresponding path program 1 times [2021-12-22 08:33:54,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:54,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840029487] [2021-12-22 08:33:54,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:54,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:54,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 08:33:54,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:54,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:54,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840029487] [2021-12-22 08:33:54,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840029487] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:54,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:54,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:33:54,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516664611] [2021-12-22 08:33:54,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:54,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:33:54,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:54,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:33:54,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:33:54,827 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) [2021-12-22 08:33:55,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:55,142 INFO L93 Difference]: Finished difference Result 716 states and 1026 transitions. [2021-12-22 08:33:55,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:33:55,143 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 [2021-12-22 08:33:55,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:55,146 INFO L225 Difference]: With dead ends: 716 [2021-12-22 08:33:55,146 INFO L226 Difference]: Without dead ends: 710 [2021-12-22 08:33:55,146 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 [2021-12-22 08:33:55,147 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 [2021-12-22 08:33:55,147 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] [2021-12-22 08:33:55,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2021-12-22 08:33:55,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 692. [2021-12-22 08:33:55,178 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) [2021-12-22 08:33:55,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 979 transitions. [2021-12-22 08:33:55,180 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 979 transitions. Word has length 39 [2021-12-22 08:33:55,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:55,180 INFO L470 AbstractCegarLoop]: Abstraction has 692 states and 979 transitions. [2021-12-22 08:33:55,180 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) [2021-12-22 08:33:55,180 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 979 transitions. [2021-12-22 08:33:55,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-22 08:33:55,182 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:55,182 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] [2021-12-22 08:33:55,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 08:33:55,182 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:55,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:55,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1290991354, now seen corresponding path program 1 times [2021-12-22 08:33:55,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:55,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62830728] [2021-12-22 08:33:55,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:55,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:55,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 08:33:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:55,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:55,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:55,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62830728] [2021-12-22 08:33:55,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62830728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:55,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:55,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 08:33:55,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237120060] [2021-12-22 08:33:55,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:55,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:33:55,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:55,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:33:55,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:33:55,226 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) [2021-12-22 08:33:55,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:55,529 INFO L93 Difference]: Finished difference Result 731 states and 1044 transitions. [2021-12-22 08:33:55,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:33:55,529 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 [2021-12-22 08:33:55,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:55,532 INFO L225 Difference]: With dead ends: 731 [2021-12-22 08:33:55,532 INFO L226 Difference]: Without dead ends: 699 [2021-12-22 08:33:55,533 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 [2021-12-22 08:33:55,533 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:55,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 3968 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:33:55,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-12-22 08:33:55,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 683. [2021-12-22 08:33:55,557 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) [2021-12-22 08:33:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 955 transitions. [2021-12-22 08:33:55,559 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 955 transitions. Word has length 40 [2021-12-22 08:33:55,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:55,560 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 955 transitions. [2021-12-22 08:33:55,560 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) [2021-12-22 08:33:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 955 transitions. [2021-12-22 08:33:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 08:33:55,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:55,561 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] [2021-12-22 08:33:55,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 08:33:55,562 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1689117095, now seen corresponding path program 1 times [2021-12-22 08:33:55,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:55,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583671064] [2021-12-22 08:33:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:55,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:55,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:33:55,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:55,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:55,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:55,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583671064] [2021-12-22 08:33:55,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583671064] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:55,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:55,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:33:55,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62165316] [2021-12-22 08:33:55,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:55,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:33:55,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:55,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:33:55,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:33:55,590 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) [2021-12-22 08:33:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:56,008 INFO L93 Difference]: Finished difference Result 764 states and 1068 transitions. [2021-12-22 08:33:56,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:33:56,009 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 [2021-12-22 08:33:56,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:56,011 INFO L225 Difference]: With dead ends: 764 [2021-12-22 08:33:56,011 INFO L226 Difference]: Without dead ends: 728 [2021-12-22 08:33:56,012 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 [2021-12-22 08:33:56,012 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:56,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [809 Valid, 1511 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 08:33:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-12-22 08:33:56,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 683. [2021-12-22 08:33:56,039 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) [2021-12-22 08:33:56,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 954 transitions. [2021-12-22 08:33:56,041 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 954 transitions. Word has length 41 [2021-12-22 08:33:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:56,041 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 954 transitions. [2021-12-22 08:33:56,041 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) [2021-12-22 08:33:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 954 transitions. [2021-12-22 08:33:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 08:33:56,043 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:56,043 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] [2021-12-22 08:33:56,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 08:33:56,043 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash -90091863, now seen corresponding path program 1 times [2021-12-22 08:33:56,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:56,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518005574] [2021-12-22 08:33:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:56,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:56,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:33:56,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:56,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 08:33:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:56,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:56,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:56,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518005574] [2021-12-22 08:33:56,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518005574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:56,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:56,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:33:56,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110283347] [2021-12-22 08:33:56,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:56,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:33:56,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:33:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:33:56,075 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) [2021-12-22 08:33:56,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:56,446 INFO L93 Difference]: Finished difference Result 890 states and 1253 transitions. [2021-12-22 08:33:56,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:33:56,446 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 [2021-12-22 08:33:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:56,449 INFO L225 Difference]: With dead ends: 890 [2021-12-22 08:33:56,449 INFO L226 Difference]: Without dead ends: 678 [2021-12-22 08:33:56,450 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 [2021-12-22 08:33:56,450 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 [2021-12-22 08:33:56,450 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] [2021-12-22 08:33:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-22 08:33:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 662. [2021-12-22 08:33:56,486 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) [2021-12-22 08:33:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 924 transitions. [2021-12-22 08:33:56,488 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 924 transitions. Word has length 43 [2021-12-22 08:33:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:56,488 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 924 transitions. [2021-12-22 08:33:56,488 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) [2021-12-22 08:33:56,488 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 924 transitions. [2021-12-22 08:33:56,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 08:33:56,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:56,490 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] [2021-12-22 08:33:56,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 08:33:56,490 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:56,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1421107692, now seen corresponding path program 1 times [2021-12-22 08:33:56,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:56,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233158559] [2021-12-22 08:33:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:56,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:56,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:33:56,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:56,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:33:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:56,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:56,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233158559] [2021-12-22 08:33:56,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233158559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:56,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:56,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 08:33:56,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583672346] [2021-12-22 08:33:56,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:56,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 08:33:56,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:56,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 08:33:56,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:33:56,591 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) [2021-12-22 08:33:57,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:57,177 INFO L93 Difference]: Finished difference Result 692 states and 978 transitions. [2021-12-22 08:33:57,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 08:33:57,177 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 [2021-12-22 08:33:57,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:57,180 INFO L225 Difference]: With dead ends: 692 [2021-12-22 08:33:57,180 INFO L226 Difference]: Without dead ends: 676 [2021-12-22 08:33:57,180 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 [2021-12-22 08:33:57,181 INFO L933 BasicCegarLoop]: 608 mSDtfsCounter, 98 mSDsluCounter, 3829 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:57,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 4437 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:33:57,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-12-22 08:33:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 660. [2021-12-22 08:33:57,206 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) [2021-12-22 08:33:57,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 920 transitions. [2021-12-22 08:33:57,207 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 920 transitions. Word has length 43 [2021-12-22 08:33:57,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:57,208 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 920 transitions. [2021-12-22 08:33:57,208 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) [2021-12-22 08:33:57,208 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 920 transitions. [2021-12-22 08:33:57,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 08:33:57,209 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:57,209 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] [2021-12-22 08:33:57,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 08:33:57,210 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:57,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:57,210 INFO L85 PathProgramCache]: Analyzing trace with hash 531963361, now seen corresponding path program 1 times [2021-12-22 08:33:57,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:57,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680028010] [2021-12-22 08:33:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:57,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:57,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:57,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:33:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:57,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:33:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:57,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:57,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680028010] [2021-12-22 08:33:57,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680028010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:57,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:57,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 08:33:57,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696231357] [2021-12-22 08:33:57,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:57,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:33:57,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:57,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:33:57,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:33:57,296 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) [2021-12-22 08:33:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:57,919 INFO L93 Difference]: Finished difference Result 712 states and 998 transitions. [2021-12-22 08:33:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:33:57,920 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 [2021-12-22 08:33:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:57,922 INFO L225 Difference]: With dead ends: 712 [2021-12-22 08:33:57,923 INFO L226 Difference]: Without dead ends: 691 [2021-12-22 08:33:57,923 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 [2021-12-22 08:33:57,923 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 [2021-12-22 08:33:57,924 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] [2021-12-22 08:33:57,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-12-22 08:33:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 659. [2021-12-22 08:33:57,950 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) [2021-12-22 08:33:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 909 transitions. [2021-12-22 08:33:57,952 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 909 transitions. Word has length 44 [2021-12-22 08:33:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:57,953 INFO L470 AbstractCegarLoop]: Abstraction has 659 states and 909 transitions. [2021-12-22 08:33:57,953 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) [2021-12-22 08:33:57,953 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 909 transitions. [2021-12-22 08:33:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 08:33:57,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:57,954 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] [2021-12-22 08:33:57,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 08:33:57,955 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:57,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:57,955 INFO L85 PathProgramCache]: Analyzing trace with hash -927803137, now seen corresponding path program 1 times [2021-12-22 08:33:57,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:57,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420252438] [2021-12-22 08:33:57,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:57,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:58,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 08:33:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:58,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:33:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:58,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:58,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:58,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420252438] [2021-12-22 08:33:58,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420252438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:58,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:58,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 08:33:58,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735519119] [2021-12-22 08:33:58,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:58,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 08:33:58,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:58,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 08:33:58,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:33:58,058 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) [2021-12-22 08:33:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:58,637 INFO L93 Difference]: Finished difference Result 688 states and 962 transitions. [2021-12-22 08:33:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 08:33:58,637 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 [2021-12-22 08:33:58,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:58,640 INFO L225 Difference]: With dead ends: 688 [2021-12-22 08:33:58,640 INFO L226 Difference]: Without dead ends: 672 [2021-12-22 08:33:58,640 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 [2021-12-22 08:33:58,640 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 [2021-12-22 08:33:58,641 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] [2021-12-22 08:33:58,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-22 08:33:58,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 656. [2021-12-22 08:33:58,666 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) [2021-12-22 08:33:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 904 transitions. [2021-12-22 08:33:58,668 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 904 transitions. Word has length 44 [2021-12-22 08:33:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:58,668 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 904 transitions. [2021-12-22 08:33:58,668 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) [2021-12-22 08:33:58,668 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 904 transitions. [2021-12-22 08:33:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 08:33:58,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:58,669 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] [2021-12-22 08:33:58,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 08:33:58,670 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:58,670 INFO L85 PathProgramCache]: Analyzing trace with hash 116231593, now seen corresponding path program 1 times [2021-12-22 08:33:58,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:58,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6290493] [2021-12-22 08:33:58,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:58,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:58,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 08:33:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:58,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:58,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:58,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6290493] [2021-12-22 08:33:58,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6290493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:58,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:58,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 08:33:58,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448855463] [2021-12-22 08:33:58,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:58,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:33:58,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:33:58,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:33:58,720 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) [2021-12-22 08:33:59,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:59,064 INFO L93 Difference]: Finished difference Result 727 states and 1001 transitions. [2021-12-22 08:33:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:33:59,065 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 [2021-12-22 08:33:59,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:59,067 INFO L225 Difference]: With dead ends: 727 [2021-12-22 08:33:59,067 INFO L226 Difference]: Without dead ends: 660 [2021-12-22 08:33:59,068 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 [2021-12-22 08:33:59,068 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:59,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 4175 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:33:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-12-22 08:33:59,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 644. [2021-12-22 08:33:59,102 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) [2021-12-22 08:33:59,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 883 transitions. [2021-12-22 08:33:59,103 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 883 transitions. Word has length 44 [2021-12-22 08:33:59,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:59,104 INFO L470 AbstractCegarLoop]: Abstraction has 644 states and 883 transitions. [2021-12-22 08:33:59,104 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) [2021-12-22 08:33:59,104 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 883 transitions. [2021-12-22 08:33:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 08:33:59,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:59,105 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] [2021-12-22 08:33:59,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 08:33:59,106 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:59,106 INFO L85 PathProgramCache]: Analyzing trace with hash 39637354, now seen corresponding path program 1 times [2021-12-22 08:33:59,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:59,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221152436] [2021-12-22 08:33:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:59,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:59,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:33:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:59,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:33:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:59,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221152436] [2021-12-22 08:33:59,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221152436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:59,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:59,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:33:59,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713026008] [2021-12-22 08:33:59,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:59,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:33:59,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:59,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:33:59,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:33:59,142 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) [2021-12-22 08:33:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:59,477 INFO L93 Difference]: Finished difference Result 789 states and 1125 transitions. [2021-12-22 08:33:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:33:59,478 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 [2021-12-22 08:33:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:59,481 INFO L225 Difference]: With dead ends: 789 [2021-12-22 08:33:59,481 INFO L226 Difference]: Without dead ends: 695 [2021-12-22 08:33:59,482 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 [2021-12-22 08:33:59,482 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:59,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 2225 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:33:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-12-22 08:33:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 651. [2021-12-22 08:33:59,512 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) [2021-12-22 08:33:59,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 898 transitions. [2021-12-22 08:33:59,513 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 898 transitions. Word has length 45 [2021-12-22 08:33:59,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:59,514 INFO L470 AbstractCegarLoop]: Abstraction has 651 states and 898 transitions. [2021-12-22 08:33:59,514 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) [2021-12-22 08:33:59,514 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 898 transitions. [2021-12-22 08:33:59,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 08:33:59,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:59,516 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] [2021-12-22 08:33:59,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 08:33:59,516 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:59,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:59,517 INFO L85 PathProgramCache]: Analyzing trace with hash -469835736, now seen corresponding path program 1 times [2021-12-22 08:33:59,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:59,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542227518] [2021-12-22 08:33:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:59,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:59,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:33:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:59,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:33:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:59,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:33:59,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:59,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542227518] [2021-12-22 08:33:59,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542227518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:59,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:59,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 08:33:59,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965793052] [2021-12-22 08:33:59,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:59,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:33:59,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:59,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:33:59,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:33:59,574 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) [2021-12-22 08:33:59,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:59,949 INFO L93 Difference]: Finished difference Result 689 states and 966 transitions. [2021-12-22 08:33:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:33:59,950 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 [2021-12-22 08:33:59,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:59,952 INFO L225 Difference]: With dead ends: 689 [2021-12-22 08:33:59,952 INFO L226 Difference]: Without dead ends: 669 [2021-12-22 08:33:59,952 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 [2021-12-22 08:33:59,953 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:59,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 3506 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:33:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-22 08:33:59,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 649. [2021-12-22 08:33:59,977 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) [2021-12-22 08:33:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 894 transitions. [2021-12-22 08:33:59,978 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 894 transitions. Word has length 45 [2021-12-22 08:33:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:59,978 INFO L470 AbstractCegarLoop]: Abstraction has 649 states and 894 transitions. [2021-12-22 08:33:59,979 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) [2021-12-22 08:33:59,979 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 894 transitions. [2021-12-22 08:33:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 08:33:59,983 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:59,983 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] [2021-12-22 08:33:59,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 08:33:59,984 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:59,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1759820693, now seen corresponding path program 1 times [2021-12-22 08:33:59,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:59,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642580674] [2021-12-22 08:33:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:59,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:00,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:34:00,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:00,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:00,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:00,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642580674] [2021-12-22 08:34:00,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642580674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:00,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:00,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 08:34:00,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968098852] [2021-12-22 08:34:00,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:00,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:34:00,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:00,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:34:00,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:34:00,031 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) [2021-12-22 08:34:00,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:00,328 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2021-12-22 08:34:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:34:00,328 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 [2021-12-22 08:34:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:00,331 INFO L225 Difference]: With dead ends: 696 [2021-12-22 08:34:00,331 INFO L226 Difference]: Without dead ends: 661 [2021-12-22 08:34:00,332 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 [2021-12-22 08:34:00,332 INFO L933 BasicCegarLoop]: 569 mSDtfsCounter, 166 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-22 08:34:00,332 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] [2021-12-22 08:34:00,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-12-22 08:34:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 641. [2021-12-22 08:34:00,356 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) [2021-12-22 08:34:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 878 transitions. [2021-12-22 08:34:00,358 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 878 transitions. Word has length 45 [2021-12-22 08:34:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:00,358 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 878 transitions. [2021-12-22 08:34:00,358 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) [2021-12-22 08:34:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 878 transitions. [2021-12-22 08:34:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 08:34:00,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:00,360 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] [2021-12-22 08:34:00,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 08:34:00,360 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:00,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:00,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1002239718, now seen corresponding path program 1 times [2021-12-22 08:34:00,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:00,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439675126] [2021-12-22 08:34:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:00,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:00,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:00,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:34:00,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:00,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:00,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:00,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:00,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439675126] [2021-12-22 08:34:00,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439675126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:00,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:00,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 08:34:00,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138045888] [2021-12-22 08:34:00,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:00,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:34:00,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:00,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:34:00,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:00,489 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) [2021-12-22 08:34:01,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:01,157 INFO L93 Difference]: Finished difference Result 676 states and 943 transitions. [2021-12-22 08:34:01,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 08:34:01,157 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 [2021-12-22 08:34:01,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:01,159 INFO L225 Difference]: With dead ends: 676 [2021-12-22 08:34:01,159 INFO L226 Difference]: Without dead ends: 658 [2021-12-22 08:34:01,160 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 [2021-12-22 08:34:01,160 INFO L933 BasicCegarLoop]: 545 mSDtfsCounter, 110 mSDsluCounter, 3784 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:01,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 4329 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 08:34:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-22 08:34:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 638. [2021-12-22 08:34:01,186 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) [2021-12-22 08:34:01,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 873 transitions. [2021-12-22 08:34:01,187 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 873 transitions. Word has length 46 [2021-12-22 08:34:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:01,188 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 873 transitions. [2021-12-22 08:34:01,188 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) [2021-12-22 08:34:01,188 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 873 transitions. [2021-12-22 08:34:01,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 08:34:01,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:01,189 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] [2021-12-22 08:34:01,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 08:34:01,190 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:01,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash -113531146, now seen corresponding path program 1 times [2021-12-22 08:34:01,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:01,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207742814] [2021-12-22 08:34:01,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:01,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:01,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:34:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:01,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 08:34:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:01,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:01,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207742814] [2021-12-22 08:34:01,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207742814] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:01,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:01,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:01,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623757657] [2021-12-22 08:34:01,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:01,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:01,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:01,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:01,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:01,233 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) [2021-12-22 08:34:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:01,474 INFO L93 Difference]: Finished difference Result 695 states and 980 transitions. [2021-12-22 08:34:01,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:01,475 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 [2021-12-22 08:34:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:01,478 INFO L225 Difference]: With dead ends: 695 [2021-12-22 08:34:01,478 INFO L226 Difference]: Without dead ends: 668 [2021-12-22 08:34:01,478 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 [2021-12-22 08:34:01,479 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 [2021-12-22 08:34:01,480 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] [2021-12-22 08:34:01,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-12-22 08:34:01,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 642. [2021-12-22 08:34:01,515 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) [2021-12-22 08:34:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 891 transitions. [2021-12-22 08:34:01,517 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 891 transitions. Word has length 46 [2021-12-22 08:34:01,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:01,517 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 891 transitions. [2021-12-22 08:34:01,517 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) [2021-12-22 08:34:01,517 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 891 transitions. [2021-12-22 08:34:01,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 08:34:01,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:01,519 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] [2021-12-22 08:34:01,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 08:34:01,519 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1400503670, now seen corresponding path program 1 times [2021-12-22 08:34:01,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:01,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996343343] [2021-12-22 08:34:01,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:01,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:01,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:01,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 08:34:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:01,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:01,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:01,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996343343] [2021-12-22 08:34:01,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996343343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:01,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:01,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 08:34:01,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799248586] [2021-12-22 08:34:01,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:01,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:34:01,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:34:01,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:34:01,619 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) [2021-12-22 08:34:02,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:02,216 INFO L93 Difference]: Finished difference Result 696 states and 976 transitions. [2021-12-22 08:34:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:34:02,216 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 [2021-12-22 08:34:02,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:02,219 INFO L225 Difference]: With dead ends: 696 [2021-12-22 08:34:02,219 INFO L226 Difference]: Without dead ends: 676 [2021-12-22 08:34:02,219 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 [2021-12-22 08:34:02,220 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 [2021-12-22 08:34:02,220 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] [2021-12-22 08:34:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-12-22 08:34:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 640. [2021-12-22 08:34:02,243 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) [2021-12-22 08:34:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 887 transitions. [2021-12-22 08:34:02,245 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 887 transitions. Word has length 47 [2021-12-22 08:34:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:02,245 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 887 transitions. [2021-12-22 08:34:02,245 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) [2021-12-22 08:34:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 887 transitions. [2021-12-22 08:34:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 08:34:02,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:02,247 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] [2021-12-22 08:34:02,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 08:34:02,247 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash -926060850, now seen corresponding path program 1 times [2021-12-22 08:34:02,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956702871] [2021-12-22 08:34:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:02,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:02,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 08:34:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:02,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:02,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:02,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956702871] [2021-12-22 08:34:02,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956702871] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:02,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:02,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 08:34:02,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136906138] [2021-12-22 08:34:02,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:02,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 08:34:02,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:02,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 08:34:02,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:34:02,385 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) [2021-12-22 08:34:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:02,966 INFO L93 Difference]: Finished difference Result 675 states and 952 transitions. [2021-12-22 08:34:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:34:02,967 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 [2021-12-22 08:34:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:02,969 INFO L225 Difference]: With dead ends: 675 [2021-12-22 08:34:02,969 INFO L226 Difference]: Without dead ends: 651 [2021-12-22 08:34:02,970 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 [2021-12-22 08:34:02,970 INFO L933 BasicCegarLoop]: 539 mSDtfsCounter, 123 mSDsluCounter, 4143 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:02,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 4682 Invalid, 1421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1354 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:34:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-12-22 08:34:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 631. [2021-12-22 08:34:02,994 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) [2021-12-22 08:34:02,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 874 transitions. [2021-12-22 08:34:02,995 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 874 transitions. Word has length 54 [2021-12-22 08:34:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:02,995 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 874 transitions. [2021-12-22 08:34:02,995 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) [2021-12-22 08:34:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 874 transitions. [2021-12-22 08:34:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 08:34:02,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:02,997 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] [2021-12-22 08:34:02,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 08:34:02,997 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:02,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:02,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1310476923, now seen corresponding path program 1 times [2021-12-22 08:34:02,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:02,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985830569] [2021-12-22 08:34:02,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:02,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:03,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:03,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:03,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:03,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:03,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985830569] [2021-12-22 08:34:03,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985830569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:03,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:03,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 08:34:03,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326775553] [2021-12-22 08:34:03,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:03,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 08:34:03,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:03,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 08:34:03,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:34:03,126 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) [2021-12-22 08:34:03,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:03,706 INFO L93 Difference]: Finished difference Result 666 states and 938 transitions. [2021-12-22 08:34:03,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:34:03,706 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 [2021-12-22 08:34:03,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:03,710 INFO L225 Difference]: With dead ends: 666 [2021-12-22 08:34:03,710 INFO L226 Difference]: Without dead ends: 648 [2021-12-22 08:34:03,711 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 [2021-12-22 08:34:03,712 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:03,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 4577 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:34:03,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-12-22 08:34:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 628. [2021-12-22 08:34:03,759 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) [2021-12-22 08:34:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 869 transitions. [2021-12-22 08:34:03,760 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 869 transitions. Word has length 48 [2021-12-22 08:34:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:03,761 INFO L470 AbstractCegarLoop]: Abstraction has 628 states and 869 transitions. [2021-12-22 08:34:03,761 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) [2021-12-22 08:34:03,761 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 869 transitions. [2021-12-22 08:34:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 08:34:03,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:03,762 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] [2021-12-22 08:34:03,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 08:34:03,763 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash -631995317, now seen corresponding path program 1 times [2021-12-22 08:34:03,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:03,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790680166] [2021-12-22 08:34:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:03,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:03,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:34:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:03,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:03,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790680166] [2021-12-22 08:34:03,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790680166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:03,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:03,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 08:34:03,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324801183] [2021-12-22 08:34:03,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:03,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 08:34:03,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 08:34:03,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:34:03,875 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) [2021-12-22 08:34:04,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:04,543 INFO L93 Difference]: Finished difference Result 663 states and 933 transitions. [2021-12-22 08:34:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:34:04,543 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 [2021-12-22 08:34:04,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:04,545 INFO L225 Difference]: With dead ends: 663 [2021-12-22 08:34:04,546 INFO L226 Difference]: Without dead ends: 645 [2021-12-22 08:34:04,546 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 [2021-12-22 08:34:04,546 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 [2021-12-22 08:34:04,546 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] [2021-12-22 08:34:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-12-22 08:34:04,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 625. [2021-12-22 08:34:04,580 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) [2021-12-22 08:34:04,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 864 transitions. [2021-12-22 08:34:04,581 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 864 transitions. Word has length 47 [2021-12-22 08:34:04,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:04,581 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 864 transitions. [2021-12-22 08:34:04,581 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) [2021-12-22 08:34:04,581 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 864 transitions. [2021-12-22 08:34:04,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 08:34:04,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:04,583 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] [2021-12-22 08:34:04,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-22 08:34:04,583 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:04,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:04,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1897196007, now seen corresponding path program 1 times [2021-12-22 08:34:04,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:04,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826144957] [2021-12-22 08:34:04,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:04,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:04,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:04,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 08:34:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:04,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:04,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:04,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:04,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:04,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:04,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826144957] [2021-12-22 08:34:04,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826144957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:04,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:04,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:34:04,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789182457] [2021-12-22 08:34:04,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:04,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:34:04,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:04,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:34:04,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:34:04,625 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) [2021-12-22 08:34:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:04,938 INFO L93 Difference]: Finished difference Result 886 states and 1230 transitions. [2021-12-22 08:34:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:04,939 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 [2021-12-22 08:34:04,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:04,941 INFO L225 Difference]: With dead ends: 886 [2021-12-22 08:34:04,942 INFO L226 Difference]: Without dead ends: 736 [2021-12-22 08:34:04,942 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 [2021-12-22 08:34:04,943 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:04,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 1312 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:34:04,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2021-12-22 08:34:04,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 689. [2021-12-22 08:34:04,969 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) [2021-12-22 08:34:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 947 transitions. [2021-12-22 08:34:04,973 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 947 transitions. Word has length 50 [2021-12-22 08:34:04,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:04,974 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 947 transitions. [2021-12-22 08:34:04,974 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) [2021-12-22 08:34:04,974 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 947 transitions. [2021-12-22 08:34:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 08:34:04,975 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:04,976 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] [2021-12-22 08:34:04,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-22 08:34:04,976 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:04,976 INFO L85 PathProgramCache]: Analyzing trace with hash -532277969, now seen corresponding path program 1 times [2021-12-22 08:34:04,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:04,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803262741] [2021-12-22 08:34:04,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:04,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:05,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:34:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:05,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:34:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:05,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:05,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:05,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803262741] [2021-12-22 08:34:05,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803262741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:05,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:05,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 08:34:05,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877904299] [2021-12-22 08:34:05,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:05,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:34:05,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:05,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:34:05,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:05,114 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) [2021-12-22 08:34:05,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:05,776 INFO L93 Difference]: Finished difference Result 753 states and 1042 transitions. [2021-12-22 08:34:05,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:34:05,777 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 [2021-12-22 08:34:05,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:05,787 INFO L225 Difference]: With dead ends: 753 [2021-12-22 08:34:05,787 INFO L226 Difference]: Without dead ends: 733 [2021-12-22 08:34:05,787 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 [2021-12-22 08:34:05,788 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 245 mSDsluCounter, 4726 mSDsCounter, 0 mSdLazyCounter, 1362 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:05,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 5232 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1362 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:34:05,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2021-12-22 08:34:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 687. [2021-12-22 08:34:05,816 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) [2021-12-22 08:34:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 943 transitions. [2021-12-22 08:34:05,817 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 943 transitions. Word has length 52 [2021-12-22 08:34:05,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:05,818 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 943 transitions. [2021-12-22 08:34:05,818 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) [2021-12-22 08:34:05,818 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 943 transitions. [2021-12-22 08:34:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 08:34:05,819 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:05,819 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] [2021-12-22 08:34:05,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-22 08:34:05,820 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:05,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:05,820 INFO L85 PathProgramCache]: Analyzing trace with hash 232958448, now seen corresponding path program 1 times [2021-12-22 08:34:05,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:05,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477914957] [2021-12-22 08:34:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:05,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:05,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:05,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:05,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 08:34:05,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:05,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:05,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477914957] [2021-12-22 08:34:05,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477914957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:05,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:05,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 08:34:05,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318888569] [2021-12-22 08:34:05,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:05,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:34:05,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:34:05,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:05,930 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) [2021-12-22 08:34:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:06,521 INFO L93 Difference]: Finished difference Result 751 states and 1038 transitions. [2021-12-22 08:34:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:34:06,521 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 [2021-12-22 08:34:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:06,523 INFO L225 Difference]: With dead ends: 751 [2021-12-22 08:34:06,523 INFO L226 Difference]: Without dead ends: 731 [2021-12-22 08:34:06,524 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 [2021-12-22 08:34:06,525 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 [2021-12-22 08:34:06,525 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] [2021-12-22 08:34:06,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-12-22 08:34:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 685. [2021-12-22 08:34:06,566 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) [2021-12-22 08:34:06,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 939 transitions. [2021-12-22 08:34:06,567 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 939 transitions. Word has length 51 [2021-12-22 08:34:06,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:06,567 INFO L470 AbstractCegarLoop]: Abstraction has 685 states and 939 transitions. [2021-12-22 08:34:06,568 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) [2021-12-22 08:34:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 939 transitions. [2021-12-22 08:34:06,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 08:34:06,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:06,569 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] [2021-12-22 08:34:06,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-22 08:34:06,569 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:06,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:06,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1506455403, now seen corresponding path program 1 times [2021-12-22 08:34:06,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:06,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556902329] [2021-12-22 08:34:06,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:06,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:06,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:06,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:06,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:06,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:06,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556902329] [2021-12-22 08:34:06,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556902329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:06,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:06,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 08:34:06,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063756504] [2021-12-22 08:34:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:06,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:34:06,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:06,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:34:06,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:34:06,662 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) [2021-12-22 08:34:07,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:07,098 INFO L93 Difference]: Finished difference Result 733 states and 1017 transitions. [2021-12-22 08:34:07,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:34:07,102 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 [2021-12-22 08:34:07,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:07,109 INFO L225 Difference]: With dead ends: 733 [2021-12-22 08:34:07,110 INFO L226 Difference]: Without dead ends: 713 [2021-12-22 08:34:07,110 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 [2021-12-22 08:34:07,111 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 149 mSDsluCounter, 4267 mSDsCounter, 0 mSdLazyCounter, 1210 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:07,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 4754 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1210 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 08:34:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-12-22 08:34:07,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 683. [2021-12-22 08:34:07,142 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) [2021-12-22 08:34:07,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 935 transitions. [2021-12-22 08:34:07,143 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 935 transitions. Word has length 48 [2021-12-22 08:34:07,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:07,143 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 935 transitions. [2021-12-22 08:34:07,143 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) [2021-12-22 08:34:07,144 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 935 transitions. [2021-12-22 08:34:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 08:34:07,146 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:07,146 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] [2021-12-22 08:34:07,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-22 08:34:07,146 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:07,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:07,146 INFO L85 PathProgramCache]: Analyzing trace with hash -273874573, now seen corresponding path program 1 times [2021-12-22 08:34:07,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:07,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324635229] [2021-12-22 08:34:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:07,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:34:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 08:34:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:07,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:07,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324635229] [2021-12-22 08:34:07,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324635229] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:07,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:07,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:34:07,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687028979] [2021-12-22 08:34:07,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:07,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:34:07,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:07,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:34:07,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:34:07,175 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) [2021-12-22 08:34:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:07,356 INFO L93 Difference]: Finished difference Result 939 states and 1289 transitions. [2021-12-22 08:34:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:34:07,357 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 [2021-12-22 08:34:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:07,359 INFO L225 Difference]: With dead ends: 939 [2021-12-22 08:34:07,359 INFO L226 Difference]: Without dead ends: 639 [2021-12-22 08:34:07,360 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 [2021-12-22 08:34:07,360 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 [2021-12-22 08:34:07,360 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] [2021-12-22 08:34:07,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2021-12-22 08:34:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 610. [2021-12-22 08:34:07,382 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) [2021-12-22 08:34:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 812 transitions. [2021-12-22 08:34:07,383 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 812 transitions. Word has length 48 [2021-12-22 08:34:07,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:07,383 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 812 transitions. [2021-12-22 08:34:07,383 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) [2021-12-22 08:34:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 812 transitions. [2021-12-22 08:34:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 08:34:07,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:07,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:34:07,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-22 08:34:07,385 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1171724014, now seen corresponding path program 1 times [2021-12-22 08:34:07,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738680076] [2021-12-22 08:34:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:07,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 08:34:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:07,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:07,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738680076] [2021-12-22 08:34:07,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738680076] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:07,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:07,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:07,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183784692] [2021-12-22 08:34:07,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:07,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:07,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:07,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:07,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:07,422 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) [2021-12-22 08:34:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:07,644 INFO L93 Difference]: Finished difference Result 704 states and 925 transitions. [2021-12-22 08:34:07,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:07,645 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 [2021-12-22 08:34:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:07,653 INFO L225 Difference]: With dead ends: 704 [2021-12-22 08:34:07,653 INFO L226 Difference]: Without dead ends: 678 [2021-12-22 08:34:07,654 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 [2021-12-22 08:34:07,655 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 337 mSDsluCounter, 1551 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-22 08:34:07,655 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] [2021-12-22 08:34:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-12-22 08:34:07,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 616. [2021-12-22 08:34:07,700 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) [2021-12-22 08:34:07,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 820 transitions. [2021-12-22 08:34:07,701 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 820 transitions. Word has length 50 [2021-12-22 08:34:07,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:07,701 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 820 transitions. [2021-12-22 08:34:07,702 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) [2021-12-22 08:34:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 820 transitions. [2021-12-22 08:34:07,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 08:34:07,703 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:07,703 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] [2021-12-22 08:34:07,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-22 08:34:07,703 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 850113778, now seen corresponding path program 1 times [2021-12-22 08:34:07,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:07,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363737522] [2021-12-22 08:34:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:07,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:07,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:07,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:07,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:07,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:07,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363737522] [2021-12-22 08:34:07,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363737522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:07,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:07,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:34:07,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832844789] [2021-12-22 08:34:07,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:07,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:34:07,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:07,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:34:07,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:34:07,750 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) [2021-12-22 08:34:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:08,004 INFO L93 Difference]: Finished difference Result 733 states and 980 transitions. [2021-12-22 08:34:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:34:08,005 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 [2021-12-22 08:34:08,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:08,007 INFO L225 Difference]: With dead ends: 733 [2021-12-22 08:34:08,007 INFO L226 Difference]: Without dead ends: 628 [2021-12-22 08:34:08,007 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 [2021-12-22 08:34:08,008 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 [2021-12-22 08:34:08,008 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] [2021-12-22 08:34:08,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2021-12-22 08:34:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 616. [2021-12-22 08:34:08,038 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) [2021-12-22 08:34:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 818 transitions. [2021-12-22 08:34:08,039 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 818 transitions. Word has length 53 [2021-12-22 08:34:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:08,040 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 818 transitions. [2021-12-22 08:34:08,040 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) [2021-12-22 08:34:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 818 transitions. [2021-12-22 08:34:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 08:34:08,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:08,042 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] [2021-12-22 08:34:08,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-22 08:34:08,042 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:08,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:08,042 INFO L85 PathProgramCache]: Analyzing trace with hash -381678341, now seen corresponding path program 1 times [2021-12-22 08:34:08,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:08,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398717255] [2021-12-22 08:34:08,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:08,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:08,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 08:34:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:34:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:08,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:08,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398717255] [2021-12-22 08:34:08,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398717255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:08,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:08,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 08:34:08,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935967110] [2021-12-22 08:34:08,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:08,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:34:08,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:08,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:34:08,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:34:08,096 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) [2021-12-22 08:34:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:08,462 INFO L93 Difference]: Finished difference Result 662 states and 877 transitions. [2021-12-22 08:34:08,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:34:08,462 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 [2021-12-22 08:34:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:08,464 INFO L225 Difference]: With dead ends: 662 [2021-12-22 08:34:08,464 INFO L226 Difference]: Without dead ends: 608 [2021-12-22 08:34:08,464 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 [2021-12-22 08:34:08,464 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 185 mSDsluCounter, 2650 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-22 08:34:08,465 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] [2021-12-22 08:34:08,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-12-22 08:34:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 589. [2021-12-22 08:34:08,486 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) [2021-12-22 08:34:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 771 transitions. [2021-12-22 08:34:08,488 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 771 transitions. Word has length 51 [2021-12-22 08:34:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:08,488 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 771 transitions. [2021-12-22 08:34:08,488 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) [2021-12-22 08:34:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 771 transitions. [2021-12-22 08:34:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 08:34:08,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:08,489 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] [2021-12-22 08:34:08,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-22 08:34:08,490 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1990060921, now seen corresponding path program 1 times [2021-12-22 08:34:08,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:08,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524160873] [2021-12-22 08:34:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:08,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 08:34:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:34:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:08,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524160873] [2021-12-22 08:34:08,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524160873] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:08,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:08,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:08,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681084366] [2021-12-22 08:34:08,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:08,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:08,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:08,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:08,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:08,528 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) [2021-12-22 08:34:08,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:08,768 INFO L93 Difference]: Finished difference Result 642 states and 831 transitions. [2021-12-22 08:34:08,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:08,768 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 [2021-12-22 08:34:08,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:08,770 INFO L225 Difference]: With dead ends: 642 [2021-12-22 08:34:08,770 INFO L226 Difference]: Without dead ends: 595 [2021-12-22 08:34:08,770 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 [2021-12-22 08:34:08,771 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 [2021-12-22 08:34:08,771 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] [2021-12-22 08:34:08,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2021-12-22 08:34:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 579. [2021-12-22 08:34:08,792 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) [2021-12-22 08:34:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 755 transitions. [2021-12-22 08:34:08,793 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 755 transitions. Word has length 51 [2021-12-22 08:34:08,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:08,793 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 755 transitions. [2021-12-22 08:34:08,793 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) [2021-12-22 08:34:08,793 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 755 transitions. [2021-12-22 08:34:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 08:34:08,794 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:08,795 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] [2021-12-22 08:34:08,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-22 08:34:08,795 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:08,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:08,795 INFO L85 PathProgramCache]: Analyzing trace with hash 105801563, now seen corresponding path program 1 times [2021-12-22 08:34:08,795 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:08,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060302789] [2021-12-22 08:34:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:08,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:08,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 08:34:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:08,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:08,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060302789] [2021-12-22 08:34:08,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060302789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:08,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:08,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:08,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646735443] [2021-12-22 08:34:08,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:08,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:08,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:08,842 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) [2021-12-22 08:34:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:09,086 INFO L93 Difference]: Finished difference Result 618 states and 801 transitions. [2021-12-22 08:34:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:09,086 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 [2021-12-22 08:34:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:09,087 INFO L225 Difference]: With dead ends: 618 [2021-12-22 08:34:09,087 INFO L226 Difference]: Without dead ends: 586 [2021-12-22 08:34:09,088 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 [2021-12-22 08:34:09,093 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 171 mSDsluCounter, 1377 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-22 08:34:09,093 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] [2021-12-22 08:34:09,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-12-22 08:34:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 574. [2021-12-22 08:34:09,125 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) [2021-12-22 08:34:09,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 748 transitions. [2021-12-22 08:34:09,126 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 748 transitions. Word has length 52 [2021-12-22 08:34:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:09,126 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 748 transitions. [2021-12-22 08:34:09,127 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) [2021-12-22 08:34:09,127 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 748 transitions. [2021-12-22 08:34:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 08:34:09,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:09,128 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:34:09,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-22 08:34:09,128 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:09,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:09,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1444104729, now seen corresponding path program 1 times [2021-12-22 08:34:09,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:09,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122600817] [2021-12-22 08:34:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:09,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:09,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:09,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:09,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:09,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:09,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122600817] [2021-12-22 08:34:09,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122600817] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:09,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:09,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:34:09,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057155114] [2021-12-22 08:34:09,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:09,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:34:09,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:09,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:34:09,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:34:09,165 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) [2021-12-22 08:34:09,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:09,486 INFO L93 Difference]: Finished difference Result 691 states and 900 transitions. [2021-12-22 08:34:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:09,487 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 [2021-12-22 08:34:09,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:09,488 INFO L225 Difference]: With dead ends: 691 [2021-12-22 08:34:09,489 INFO L226 Difference]: Without dead ends: 683 [2021-12-22 08:34:09,489 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 [2021-12-22 08:34:09,489 INFO L933 BasicCegarLoop]: 452 mSDtfsCounter, 217 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 1299 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:09,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 1299 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:34:09,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-12-22 08:34:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 602. [2021-12-22 08:34:09,518 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) [2021-12-22 08:34:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 781 transitions. [2021-12-22 08:34:09,519 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 781 transitions. Word has length 52 [2021-12-22 08:34:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:09,520 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 781 transitions. [2021-12-22 08:34:09,520 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) [2021-12-22 08:34:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 781 transitions. [2021-12-22 08:34:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 08:34:09,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:09,521 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] [2021-12-22 08:34:09,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-22 08:34:09,522 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:09,522 INFO L85 PathProgramCache]: Analyzing trace with hash -2032610889, now seen corresponding path program 1 times [2021-12-22 08:34:09,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:09,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921662682] [2021-12-22 08:34:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:09,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:09,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:09,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:09,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:09,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:09,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:09,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:09,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921662682] [2021-12-22 08:34:09,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921662682] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:09,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:09,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:09,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832913837] [2021-12-22 08:34:09,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:09,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:09,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:09,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:09,574 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) [2021-12-22 08:34:09,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:09,986 INFO L93 Difference]: Finished difference Result 687 states and 894 transitions. [2021-12-22 08:34:09,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:34:09,986 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 [2021-12-22 08:34:09,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:09,987 INFO L225 Difference]: With dead ends: 687 [2021-12-22 08:34:09,987 INFO L226 Difference]: Without dead ends: 681 [2021-12-22 08:34:09,988 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 [2021-12-22 08:34:09,988 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:09,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [752 Valid, 1535 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:34:09,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-22 08:34:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 602. [2021-12-22 08:34:10,038 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) [2021-12-22 08:34:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 780 transitions. [2021-12-22 08:34:10,039 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 780 transitions. Word has length 53 [2021-12-22 08:34:10,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:10,039 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 780 transitions. [2021-12-22 08:34:10,040 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) [2021-12-22 08:34:10,040 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 780 transitions. [2021-12-22 08:34:10,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 08:34:10,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:10,042 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] [2021-12-22 08:34:10,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-22 08:34:10,042 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:10,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2028580847, now seen corresponding path program 1 times [2021-12-22 08:34:10,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:10,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283303978] [2021-12-22 08:34:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:10,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:10,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:10,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 08:34:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:10,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:10,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:10,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283303978] [2021-12-22 08:34:10,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283303978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:10,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:10,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-12-22 08:34:10,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744368859] [2021-12-22 08:34:10,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:10,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-22 08:34:10,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-22 08:34:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2021-12-22 08:34:10,184 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) [2021-12-22 08:34:10,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:10,808 INFO L93 Difference]: Finished difference Result 634 states and 819 transitions. [2021-12-22 08:34:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 08:34:10,808 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 [2021-12-22 08:34:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:10,810 INFO L225 Difference]: With dead ends: 634 [2021-12-22 08:34:10,810 INFO L226 Difference]: Without dead ends: 610 [2021-12-22 08:34:10,810 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 [2021-12-22 08:34:10,810 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 [2021-12-22 08:34:10,810 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] [2021-12-22 08:34:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-12-22 08:34:10,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 598. [2021-12-22 08:34:10,839 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) [2021-12-22 08:34:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 774 transitions. [2021-12-22 08:34:10,840 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 774 transitions. Word has length 55 [2021-12-22 08:34:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:10,841 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 774 transitions. [2021-12-22 08:34:10,841 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) [2021-12-22 08:34:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 774 transitions. [2021-12-22 08:34:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 08:34:10,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:10,842 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] [2021-12-22 08:34:10,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-22 08:34:10,842 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:10,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:10,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1717160597, now seen corresponding path program 1 times [2021-12-22 08:34:10,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:10,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821459762] [2021-12-22 08:34:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:10,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:10,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 08:34:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:10,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 08:34:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:10,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:10,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821459762] [2021-12-22 08:34:10,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821459762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:10,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:10,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:10,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613681090] [2021-12-22 08:34:10,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:10,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:10,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:10,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:10,892 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) [2021-12-22 08:34:11,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:11,140 INFO L93 Difference]: Finished difference Result 637 states and 820 transitions. [2021-12-22 08:34:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:11,140 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 [2021-12-22 08:34:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:11,142 INFO L225 Difference]: With dead ends: 637 [2021-12-22 08:34:11,142 INFO L226 Difference]: Without dead ends: 605 [2021-12-22 08:34:11,142 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 [2021-12-22 08:34:11,142 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 171 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-22 08:34:11,142 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] [2021-12-22 08:34:11,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2021-12-22 08:34:11,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 593. [2021-12-22 08:34:11,166 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) [2021-12-22 08:34:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 767 transitions. [2021-12-22 08:34:11,167 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 767 transitions. Word has length 54 [2021-12-22 08:34:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:11,168 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 767 transitions. [2021-12-22 08:34:11,168 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) [2021-12-22 08:34:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 767 transitions. [2021-12-22 08:34:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 08:34:11,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:11,169 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] [2021-12-22 08:34:11,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-22 08:34:11,169 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:11,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:11,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1513646241, now seen corresponding path program 1 times [2021-12-22 08:34:11,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:11,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034155343] [2021-12-22 08:34:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:11,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:11,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 08:34:11,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:11,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 08:34:11,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:11,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:11,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:11,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034155343] [2021-12-22 08:34:11,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034155343] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:11,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:11,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 08:34:11,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256381794] [2021-12-22 08:34:11,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:11,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:34:11,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:11,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:34:11,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:11,236 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) [2021-12-22 08:34:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:11,589 INFO L93 Difference]: Finished difference Result 628 states and 810 transitions. [2021-12-22 08:34:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 08:34:11,590 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 [2021-12-22 08:34:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:11,591 INFO L225 Difference]: With dead ends: 628 [2021-12-22 08:34:11,591 INFO L226 Difference]: Without dead ends: 602 [2021-12-22 08:34:11,591 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 [2021-12-22 08:34:11,591 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 [2021-12-22 08:34:11,592 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] [2021-12-22 08:34:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-12-22 08:34:11,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 590. [2021-12-22 08:34:11,626 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) [2021-12-22 08:34:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 762 transitions. [2021-12-22 08:34:11,628 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 762 transitions. Word has length 54 [2021-12-22 08:34:11,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:11,628 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 762 transitions. [2021-12-22 08:34:11,629 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) [2021-12-22 08:34:11,629 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 762 transitions. [2021-12-22 08:34:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 08:34:11,630 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:11,630 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] [2021-12-22 08:34:11,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-22 08:34:11,630 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:11,631 INFO L85 PathProgramCache]: Analyzing trace with hash 773886590, now seen corresponding path program 1 times [2021-12-22 08:34:11,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:11,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303493948] [2021-12-22 08:34:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:11,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:11,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:11,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:11,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:11,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:11,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:11,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303493948] [2021-12-22 08:34:11,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303493948] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:11,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:11,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:11,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174003561] [2021-12-22 08:34:11,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:11,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:11,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:11,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:11,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:11,682 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) [2021-12-22 08:34:12,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:12,129 INFO L93 Difference]: Finished difference Result 673 states and 872 transitions. [2021-12-22 08:34:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 08:34:12,130 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 [2021-12-22 08:34:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:12,131 INFO L225 Difference]: With dead ends: 673 [2021-12-22 08:34:12,132 INFO L226 Difference]: Without dead ends: 669 [2021-12-22 08:34:12,132 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 [2021-12-22 08:34:12,132 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 696 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1461 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:12,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [729 Valid, 1461 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:34:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-12-22 08:34:12,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 588. [2021-12-22 08:34:12,162 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) [2021-12-22 08:34:12,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 759 transitions. [2021-12-22 08:34:12,163 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 759 transitions. Word has length 54 [2021-12-22 08:34:12,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:12,164 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 759 transitions. [2021-12-22 08:34:12,164 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) [2021-12-22 08:34:12,164 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 759 transitions. [2021-12-22 08:34:12,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 08:34:12,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:12,165 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] [2021-12-22 08:34:12,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-22 08:34:12,165 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash 774163420, now seen corresponding path program 1 times [2021-12-22 08:34:12,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:12,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577521778] [2021-12-22 08:34:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:12,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:12,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:12,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:12,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:12,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577521778] [2021-12-22 08:34:12,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577521778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:12,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:12,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 08:34:12,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161812442] [2021-12-22 08:34:12,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:12,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:34:12,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:12,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:34:12,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:12,264 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) [2021-12-22 08:34:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:12,825 INFO L93 Difference]: Finished difference Result 610 states and 786 transitions. [2021-12-22 08:34:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:34:12,825 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 [2021-12-22 08:34:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:12,827 INFO L225 Difference]: With dead ends: 610 [2021-12-22 08:34:12,827 INFO L226 Difference]: Without dead ends: 562 [2021-12-22 08:34:12,827 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 [2021-12-22 08:34:12,827 INFO L933 BasicCegarLoop]: 383 mSDtfsCounter, 211 mSDsluCounter, 2443 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:12,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 2826 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:34:12,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-12-22 08:34:12,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 546. [2021-12-22 08:34:12,853 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) [2021-12-22 08:34:12,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 701 transitions. [2021-12-22 08:34:12,854 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 701 transitions. Word has length 54 [2021-12-22 08:34:12,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:12,854 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 701 transitions. [2021-12-22 08:34:12,855 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) [2021-12-22 08:34:12,855 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 701 transitions. [2021-12-22 08:34:12,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 08:34:12,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:12,856 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] [2021-12-22 08:34:12,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-22 08:34:12,856 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:12,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1350619309, now seen corresponding path program 1 times [2021-12-22 08:34:12,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:12,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762924583] [2021-12-22 08:34:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:12,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:12,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:12,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:12,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:34:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:12,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:12,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:12,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762924583] [2021-12-22 08:34:12,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762924583] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:12,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:12,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 08:34:12,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828243238] [2021-12-22 08:34:12,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:12,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:34:12,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:12,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:34:12,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:34:12,905 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) [2021-12-22 08:34:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:13,314 INFO L93 Difference]: Finished difference Result 607 states and 771 transitions. [2021-12-22 08:34:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:34:13,315 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 [2021-12-22 08:34:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:13,317 INFO L225 Difference]: With dead ends: 607 [2021-12-22 08:34:13,317 INFO L226 Difference]: Without dead ends: 576 [2021-12-22 08:34:13,317 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 [2021-12-22 08:34:13,320 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 187 mSDsluCounter, 1458 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:13,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 1863 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 08:34:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2021-12-22 08:34:13,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 546. [2021-12-22 08:34:13,345 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) [2021-12-22 08:34:13,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 700 transitions. [2021-12-22 08:34:13,346 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 700 transitions. Word has length 56 [2021-12-22 08:34:13,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:13,346 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 700 transitions. [2021-12-22 08:34:13,346 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) [2021-12-22 08:34:13,347 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 700 transitions. [2021-12-22 08:34:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 08:34:13,348 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:13,348 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] [2021-12-22 08:34:13,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-22 08:34:13,348 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1373251563, now seen corresponding path program 1 times [2021-12-22 08:34:13,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:13,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546765173] [2021-12-22 08:34:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:13,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:13,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:13,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:34:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:13,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:13,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:13,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546765173] [2021-12-22 08:34:13,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546765173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:13,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:13,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 08:34:13,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094041581] [2021-12-22 08:34:13,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:13,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:34:13,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:34:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:13,475 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) [2021-12-22 08:34:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:14,027 INFO L93 Difference]: Finished difference Result 601 states and 767 transitions. [2021-12-22 08:34:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:34:14,028 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 [2021-12-22 08:34:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:14,029 INFO L225 Difference]: With dead ends: 601 [2021-12-22 08:34:14,029 INFO L226 Difference]: Without dead ends: 571 [2021-12-22 08:34:14,030 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 [2021-12-22 08:34:14,030 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 276 mSDsluCounter, 3093 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2021-12-22 08:34:14,030 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] [2021-12-22 08:34:14,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-22 08:34:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 541. [2021-12-22 08:34:14,054 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) [2021-12-22 08:34:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 690 transitions. [2021-12-22 08:34:14,055 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 690 transitions. Word has length 56 [2021-12-22 08:34:14,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:14,061 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 690 transitions. [2021-12-22 08:34:14,061 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) [2021-12-22 08:34:14,061 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 690 transitions. [2021-12-22 08:34:14,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 08:34:14,062 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:14,062 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] [2021-12-22 08:34:14,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-22 08:34:14,063 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:14,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:14,063 INFO L85 PathProgramCache]: Analyzing trace with hash -801787505, now seen corresponding path program 1 times [2021-12-22 08:34:14,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:14,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042992003] [2021-12-22 08:34:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:14,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:34:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:14,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:14,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:14,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042992003] [2021-12-22 08:34:14,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042992003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:14,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:14,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 08:34:14,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494694897] [2021-12-22 08:34:14,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:14,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:34:14,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:14,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:34:14,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:34:14,140 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) [2021-12-22 08:34:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:14,414 INFO L93 Difference]: Finished difference Result 584 states and 740 transitions. [2021-12-22 08:34:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:34:14,415 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 [2021-12-22 08:34:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:14,416 INFO L225 Difference]: With dead ends: 584 [2021-12-22 08:34:14,416 INFO L226 Difference]: Without dead ends: 547 [2021-12-22 08:34:14,417 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 [2021-12-22 08:34:14,417 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 [2021-12-22 08:34:14,417 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] [2021-12-22 08:34:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-12-22 08:34:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 535. [2021-12-22 08:34:14,440 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) [2021-12-22 08:34:14,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 682 transitions. [2021-12-22 08:34:14,442 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 682 transitions. Word has length 56 [2021-12-22 08:34:14,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:14,442 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 682 transitions. [2021-12-22 08:34:14,442 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) [2021-12-22 08:34:14,442 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 682 transitions. [2021-12-22 08:34:14,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 08:34:14,444 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:14,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:34:14,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-22 08:34:14,445 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:14,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:14,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1511727278, now seen corresponding path program 1 times [2021-12-22 08:34:14,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:14,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57740372] [2021-12-22 08:34:14,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:14,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-22 08:34:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:34:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:14,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:14,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57740372] [2021-12-22 08:34:14,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57740372] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:14,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:14,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 08:34:14,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966411821] [2021-12-22 08:34:14,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:14,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:34:14,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:14,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:34:14,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:34:14,491 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) [2021-12-22 08:34:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:14,811 INFO L93 Difference]: Finished difference Result 578 states and 732 transitions. [2021-12-22 08:34:14,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:34:14,812 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 [2021-12-22 08:34:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:14,814 INFO L225 Difference]: With dead ends: 578 [2021-12-22 08:34:14,814 INFO L226 Difference]: Without dead ends: 535 [2021-12-22 08:34:14,814 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 [2021-12-22 08:34:14,814 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:14,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 1894 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 08:34:14,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-12-22 08:34:14,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2021-12-22 08:34:14,838 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) [2021-12-22 08:34:14,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 664 transitions. [2021-12-22 08:34:14,839 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 664 transitions. Word has length 58 [2021-12-22 08:34:14,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:14,840 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 664 transitions. [2021-12-22 08:34:14,840 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) [2021-12-22 08:34:14,840 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 664 transitions. [2021-12-22 08:34:14,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 08:34:14,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:14,841 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] [2021-12-22 08:34:14,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-22 08:34:14,841 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:14,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:14,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1341431007, now seen corresponding path program 1 times [2021-12-22 08:34:14,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:14,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177228057] [2021-12-22 08:34:14,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:14,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:14,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:14,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 08:34:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 08:34:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:14,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:14,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177228057] [2021-12-22 08:34:14,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177228057] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:14,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:14,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 08:34:14,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121401201] [2021-12-22 08:34:14,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:14,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:34:14,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:14,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:34:14,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:14,944 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) [2021-12-22 08:34:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:15,499 INFO L93 Difference]: Finished difference Result 571 states and 720 transitions. [2021-12-22 08:34:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:34:15,500 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 [2021-12-22 08:34:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:15,501 INFO L225 Difference]: With dead ends: 571 [2021-12-22 08:34:15,501 INFO L226 Difference]: Without dead ends: 551 [2021-12-22 08:34:15,501 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 [2021-12-22 08:34:15,502 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:15,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [251 Valid, 3515 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 08:34:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-12-22 08:34:15,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 521. [2021-12-22 08:34:15,526 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) [2021-12-22 08:34:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 660 transitions. [2021-12-22 08:34:15,529 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 660 transitions. Word has length 59 [2021-12-22 08:34:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:15,529 INFO L470 AbstractCegarLoop]: Abstraction has 521 states and 660 transitions. [2021-12-22 08:34:15,529 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) [2021-12-22 08:34:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 660 transitions. [2021-12-22 08:34:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 08:34:15,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:15,530 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] [2021-12-22 08:34:15,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-22 08:34:15,531 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash 477751716, now seen corresponding path program 1 times [2021-12-22 08:34:15,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:15,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114087092] [2021-12-22 08:34:15,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:15,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:15,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 08:34:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:15,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:15,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:15,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114087092] [2021-12-22 08:34:15,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114087092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:15,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:15,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 08:34:15,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049577772] [2021-12-22 08:34:15,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:15,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 08:34:15,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:15,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 08:34:15,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:34:15,651 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) [2021-12-22 08:34:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:16,295 INFO L93 Difference]: Finished difference Result 549 states and 694 transitions. [2021-12-22 08:34:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:34:16,296 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 [2021-12-22 08:34:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:16,297 INFO L225 Difference]: With dead ends: 549 [2021-12-22 08:34:16,297 INFO L226 Difference]: Without dead ends: 531 [2021-12-22 08:34:16,298 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 [2021-12-22 08:34:16,298 INFO L933 BasicCegarLoop]: 349 mSDtfsCounter, 115 mSDsluCounter, 2538 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:16,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 2887 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:34:16,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-12-22 08:34:16,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 519. [2021-12-22 08:34:16,337 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) [2021-12-22 08:34:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 656 transitions. [2021-12-22 08:34:16,338 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 656 transitions. Word has length 57 [2021-12-22 08:34:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:16,338 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 656 transitions. [2021-12-22 08:34:16,338 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) [2021-12-22 08:34:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 656 transitions. [2021-12-22 08:34:16,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 08:34:16,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:16,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:34:16,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-22 08:34:16,339 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash 999008539, now seen corresponding path program 1 times [2021-12-22 08:34:16,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:16,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470085627] [2021-12-22 08:34:16,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:16,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:16,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:16,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:16,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:16,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:16,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:16,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470085627] [2021-12-22 08:34:16,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470085627] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:16,462 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:16,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 08:34:16,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135616325] [2021-12-22 08:34:16,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:16,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:34:16,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:16,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:34:16,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:16,463 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) [2021-12-22 08:34:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:17,508 INFO L93 Difference]: Finished difference Result 1057 states and 1338 transitions. [2021-12-22 08:34:17,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 08:34:17,508 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 [2021-12-22 08:34:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:17,510 INFO L225 Difference]: With dead ends: 1057 [2021-12-22 08:34:17,510 INFO L226 Difference]: Without dead ends: 940 [2021-12-22 08:34:17,511 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 [2021-12-22 08:34:17,511 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 [2021-12-22 08:34:17,512 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] [2021-12-22 08:34:17,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-12-22 08:34:17,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 716. [2021-12-22 08:34:17,564 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) [2021-12-22 08:34:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 912 transitions. [2021-12-22 08:34:17,565 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 912 transitions. Word has length 58 [2021-12-22 08:34:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:17,565 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 912 transitions. [2021-12-22 08:34:17,566 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) [2021-12-22 08:34:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 912 transitions. [2021-12-22 08:34:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 08:34:17,567 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:17,567 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] [2021-12-22 08:34:17,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-22 08:34:17,567 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:17,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1875027545, now seen corresponding path program 1 times [2021-12-22 08:34:17,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:17,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943097800] [2021-12-22 08:34:17,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:17,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:17,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:17,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:17,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:17,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:17,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:17,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:17,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943097800] [2021-12-22 08:34:17,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943097800] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:17,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:17,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:17,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550129067] [2021-12-22 08:34:17,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:17,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:17,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:17,609 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) [2021-12-22 08:34:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:18,121 INFO L93 Difference]: Finished difference Result 1041 states and 1317 transitions. [2021-12-22 08:34:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:34:18,121 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 [2021-12-22 08:34:18,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:18,123 INFO L225 Difference]: With dead ends: 1041 [2021-12-22 08:34:18,123 INFO L226 Difference]: Without dead ends: 957 [2021-12-22 08:34:18,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:18,124 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 [2021-12-22 08:34:18,124 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] [2021-12-22 08:34:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-12-22 08:34:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 532. [2021-12-22 08:34:18,159 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) [2021-12-22 08:34:18,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 669 transitions. [2021-12-22 08:34:18,160 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 669 transitions. Word has length 58 [2021-12-22 08:34:18,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:18,160 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 669 transitions. [2021-12-22 08:34:18,161 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) [2021-12-22 08:34:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 669 transitions. [2021-12-22 08:34:18,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 08:34:18,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:18,162 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] [2021-12-22 08:34:18,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-22 08:34:18,162 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:18,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:18,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1125550286, now seen corresponding path program 1 times [2021-12-22 08:34:18,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:18,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979178010] [2021-12-22 08:34:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:18,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:18,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:18,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:18,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:18,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 08:34:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:18,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:34:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:18,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:18,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:18,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979178010] [2021-12-22 08:34:18,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979178010] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:18,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:18,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 08:34:18,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439067591] [2021-12-22 08:34:18,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:18,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:34:18,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:18,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:34:18,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:18,271 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) [2021-12-22 08:34:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:18,798 INFO L93 Difference]: Finished difference Result 567 states and 713 transitions. [2021-12-22 08:34:18,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:34:18,798 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 [2021-12-22 08:34:18,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:18,800 INFO L225 Difference]: With dead ends: 567 [2021-12-22 08:34:18,800 INFO L226 Difference]: Without dead ends: 535 [2021-12-22 08:34:18,800 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 [2021-12-22 08:34:18,800 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 303 mSDsluCounter, 2663 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2021-12-22 08:34:18,801 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] [2021-12-22 08:34:18,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-12-22 08:34:18,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 523. [2021-12-22 08:34:18,833 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) [2021-12-22 08:34:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 654 transitions. [2021-12-22 08:34:18,834 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 654 transitions. Word has length 60 [2021-12-22 08:34:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:18,834 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 654 transitions. [2021-12-22 08:34:18,834 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) [2021-12-22 08:34:18,834 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 654 transitions. [2021-12-22 08:34:18,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 08:34:18,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:18,835 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] [2021-12-22 08:34:18,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-22 08:34:18,836 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:18,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:18,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2088220112, now seen corresponding path program 1 times [2021-12-22 08:34:18,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:18,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343590399] [2021-12-22 08:34:18,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:18,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:18,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:34:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:18,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 08:34:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:18,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:18,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:18,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343590399] [2021-12-22 08:34:18,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343590399] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:18,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:18,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:18,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200081710] [2021-12-22 08:34:18,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:18,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:18,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:18,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:18,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:18,876 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) [2021-12-22 08:34:19,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:19,050 INFO L93 Difference]: Finished difference Result 562 states and 699 transitions. [2021-12-22 08:34:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:19,051 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 [2021-12-22 08:34:19,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:19,052 INFO L225 Difference]: With dead ends: 562 [2021-12-22 08:34:19,052 INFO L226 Difference]: Without dead ends: 527 [2021-12-22 08:34:19,052 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 [2021-12-22 08:34:19,052 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, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:19,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1614 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:34:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-22 08:34:19,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 515. [2021-12-22 08:34:19,083 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) [2021-12-22 08:34:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 642 transitions. [2021-12-22 08:34:19,083 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 642 transitions. Word has length 58 [2021-12-22 08:34:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:19,084 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 642 transitions. [2021-12-22 08:34:19,084 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) [2021-12-22 08:34:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 642 transitions. [2021-12-22 08:34:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 08:34:19,085 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:19,085 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] [2021-12-22 08:34:19,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-22 08:34:19,085 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:19,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1074633973, now seen corresponding path program 1 times [2021-12-22 08:34:19,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:19,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739934403] [2021-12-22 08:34:19,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:19,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:19,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:19,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:34:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:19,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 08:34:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 08:34:19,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:19,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739934403] [2021-12-22 08:34:19,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739934403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:19,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:19,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 08:34:19,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226260834] [2021-12-22 08:34:19,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:19,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 08:34:19,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:19,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 08:34:19,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:19,148 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) [2021-12-22 08:34:19,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:19,308 INFO L93 Difference]: Finished difference Result 554 states and 687 transitions. [2021-12-22 08:34:19,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:19,309 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 [2021-12-22 08:34:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:19,310 INFO L225 Difference]: With dead ends: 554 [2021-12-22 08:34:19,310 INFO L226 Difference]: Without dead ends: 517 [2021-12-22 08:34:19,310 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 [2021-12-22 08:34:19,311 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 [2021-12-22 08:34:19,311 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] [2021-12-22 08:34:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-12-22 08:34:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 505. [2021-12-22 08:34:19,341 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) [2021-12-22 08:34:19,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 628 transitions. [2021-12-22 08:34:19,342 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 628 transitions. Word has length 60 [2021-12-22 08:34:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:19,342 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 628 transitions. [2021-12-22 08:34:19,342 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) [2021-12-22 08:34:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 628 transitions. [2021-12-22 08:34:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 08:34:19,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:19,344 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, 1, 1] [2021-12-22 08:34:19,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-22 08:34:19,344 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:19,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:19,344 INFO L85 PathProgramCache]: Analyzing trace with hash 175179390, now seen corresponding path program 1 times [2021-12-22 08:34:19,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:19,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527506765] [2021-12-22 08:34:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:19,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:19,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:34:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:19,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:19,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:34:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:19,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:19,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527506765] [2021-12-22 08:34:19,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527506765] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:19,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:19,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 08:34:19,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612645320] [2021-12-22 08:34:19,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:19,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 08:34:19,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:19,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 08:34:19,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:34:19,442 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) [2021-12-22 08:34:20,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:20,214 INFO L93 Difference]: Finished difference Result 892 states and 1122 transitions. [2021-12-22 08:34:20,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 08:34:20,214 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 [2021-12-22 08:34:20,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:20,216 INFO L225 Difference]: With dead ends: 892 [2021-12-22 08:34:20,216 INFO L226 Difference]: Without dead ends: 787 [2021-12-22 08:34:20,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:34:20,216 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 [2021-12-22 08:34:20,217 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] [2021-12-22 08:34:20,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-12-22 08:34:20,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 399. [2021-12-22 08:34:20,243 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) [2021-12-22 08:34:20,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 502 transitions. [2021-12-22 08:34:20,244 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 502 transitions. Word has length 60 [2021-12-22 08:34:20,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:20,244 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 502 transitions. [2021-12-22 08:34:20,245 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) [2021-12-22 08:34:20,245 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 502 transitions. [2021-12-22 08:34:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 08:34:20,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:20,246 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] [2021-12-22 08:34:20,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-22 08:34:20,246 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:20,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:20,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1562268864, now seen corresponding path program 1 times [2021-12-22 08:34:20,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:20,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631367924] [2021-12-22 08:34:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:20,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:20,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:34:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:20,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:34:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:20,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 08:34:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:20,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:20,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:20,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631367924] [2021-12-22 08:34:20,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631367924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:20,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:20,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 08:34:20,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647807988] [2021-12-22 08:34:20,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:20,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:34:20,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:34:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:20,338 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) [2021-12-22 08:34:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:20,863 INFO L93 Difference]: Finished difference Result 431 states and 540 transitions. [2021-12-22 08:34:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 08:34:20,863 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 [2021-12-22 08:34:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:20,864 INFO L225 Difference]: With dead ends: 431 [2021-12-22 08:34:20,865 INFO L226 Difference]: Without dead ends: 409 [2021-12-22 08:34:20,865 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 [2021-12-22 08:34:20,865 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 [2021-12-22 08:34:20,866 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] [2021-12-22 08:34:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-12-22 08:34:20,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 397. [2021-12-22 08:34:20,891 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) [2021-12-22 08:34:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 499 transitions. [2021-12-22 08:34:20,892 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 499 transitions. Word has length 62 [2021-12-22 08:34:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:20,892 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 499 transitions. [2021-12-22 08:34:20,892 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) [2021-12-22 08:34:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 499 transitions. [2021-12-22 08:34:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 08:34:20,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:20,893 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] [2021-12-22 08:34:20,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-22 08:34:20,893 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash 224602701, now seen corresponding path program 1 times [2021-12-22 08:34:20,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:20,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858122274] [2021-12-22 08:34:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:20,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:20,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:20,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:20,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 08:34:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:21,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:21,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858122274] [2021-12-22 08:34:21,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858122274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:21,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:21,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 08:34:21,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783989394] [2021-12-22 08:34:21,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:21,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 08:34:21,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 08:34:21,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:34:21,075 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) [2021-12-22 08:34:21,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:21,299 INFO L93 Difference]: Finished difference Result 594 states and 758 transitions. [2021-12-22 08:34:21,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:34:21,300 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 [2021-12-22 08:34:21,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:21,301 INFO L225 Difference]: With dead ends: 594 [2021-12-22 08:34:21,301 INFO L226 Difference]: Without dead ends: 402 [2021-12-22 08:34:21,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:34:21,302 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 236 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2021-12-22 08:34:21,306 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] [2021-12-22 08:34:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-22 08:34:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 390. [2021-12-22 08:34:21,337 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) [2021-12-22 08:34:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 488 transitions. [2021-12-22 08:34:21,338 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 488 transitions. Word has length 64 [2021-12-22 08:34:21,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:21,339 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 488 transitions. [2021-12-22 08:34:21,339 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) [2021-12-22 08:34:21,339 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 488 transitions. [2021-12-22 08:34:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 08:34:21,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:21,340 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] [2021-12-22 08:34:21,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-22 08:34:21,340 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:21,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:21,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1555287307, now seen corresponding path program 1 times [2021-12-22 08:34:21,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:21,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307994037] [2021-12-22 08:34:21,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:21,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 08:34:21,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:34:21,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 08:34:21,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:21,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:21,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:21,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307994037] [2021-12-22 08:34:21,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307994037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:21,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:21,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 08:34:21,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126778406] [2021-12-22 08:34:21,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:21,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:34:21,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:21,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:34:21,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:34:21,387 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) [2021-12-22 08:34:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:21,636 INFO L93 Difference]: Finished difference Result 423 states and 525 transitions. [2021-12-22 08:34:21,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:34:21,637 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 [2021-12-22 08:34:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:21,638 INFO L225 Difference]: With dead ends: 423 [2021-12-22 08:34:21,638 INFO L226 Difference]: Without dead ends: 373 [2021-12-22 08:34:21,638 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 [2021-12-22 08:34:21,639 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 121 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-22 08:34:21,639 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] [2021-12-22 08:34:21,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-12-22 08:34:21,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 361. [2021-12-22 08:34:21,667 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) [2021-12-22 08:34:21,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 449 transitions. [2021-12-22 08:34:21,668 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 449 transitions. Word has length 66 [2021-12-22 08:34:21,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:21,668 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 449 transitions. [2021-12-22 08:34:21,668 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) [2021-12-22 08:34:21,668 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 449 transitions. [2021-12-22 08:34:21,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 08:34:21,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:21,669 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] [2021-12-22 08:34:21,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-22 08:34:21,669 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:21,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:21,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1823600415, now seen corresponding path program 1 times [2021-12-22 08:34:21,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:21,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463766949] [2021-12-22 08:34:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:21,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:21,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 08:34:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:34:21,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 08:34:21,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 08:34:21,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463766949] [2021-12-22 08:34:21,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463766949] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:34:21,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421010208] [2021-12-22 08:34:21,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:21,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:34:21,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:34:21,732 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) [2021-12-22 08:34:21,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:34:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:21,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:34:21,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:34:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:21,983 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:34:21,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421010208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:21,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:34:21,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-22 08:34:21,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724571168] [2021-12-22 08:34:21,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:21,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:34:21,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:21,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:34:21,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:34:21,990 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) [2021-12-22 08:34:22,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:22,030 INFO L93 Difference]: Finished difference Result 384 states and 471 transitions. [2021-12-22 08:34:22,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:34:22,030 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 [2021-12-22 08:34:22,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:22,031 INFO L225 Difference]: With dead ends: 384 [2021-12-22 08:34:22,031 INFO L226 Difference]: Without dead ends: 332 [2021-12-22 08:34:22,031 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 [2021-12-22 08:34:22,031 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 [2021-12-22 08:34:22,032 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] [2021-12-22 08:34:22,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-12-22 08:34:22,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2021-12-22 08:34:22,055 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) [2021-12-22 08:34:22,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 416 transitions. [2021-12-22 08:34:22,055 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 416 transitions. Word has length 62 [2021-12-22 08:34:22,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:22,056 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 416 transitions. [2021-12-22 08:34:22,056 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) [2021-12-22 08:34:22,056 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 416 transitions. [2021-12-22 08:34:22,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 08:34:22,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:22,056 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] [2021-12-22 08:34:22,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 08:34:22,276 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 [2021-12-22 08:34:22,277 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:22,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:22,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2069212948, now seen corresponding path program 1 times [2021-12-22 08:34:22,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:22,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684018262] [2021-12-22 08:34:22,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:22,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-22 08:34:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 08:34:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 08:34:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:22,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:22,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684018262] [2021-12-22 08:34:22,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684018262] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:22,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:22,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-22 08:34:22,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657989708] [2021-12-22 08:34:22,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:22,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:34:22,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:22,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:34:22,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:34:22,431 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) [2021-12-22 08:34:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:22,867 INFO L93 Difference]: Finished difference Result 346 states and 433 transitions. [2021-12-22 08:34:22,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:34:22,867 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 [2021-12-22 08:34:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:22,868 INFO L225 Difference]: With dead ends: 346 [2021-12-22 08:34:22,868 INFO L226 Difference]: Without dead ends: 270 [2021-12-22 08:34:22,868 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 [2021-12-22 08:34:22,868 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 [2021-12-22 08:34:22,869 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] [2021-12-22 08:34:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-22 08:34:22,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-12-22 08:34:22,886 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) [2021-12-22 08:34:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 336 transitions. [2021-12-22 08:34:22,887 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 336 transitions. Word has length 64 [2021-12-22 08:34:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:22,887 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 336 transitions. [2021-12-22 08:34:22,887 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) [2021-12-22 08:34:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 336 transitions. [2021-12-22 08:34:22,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 08:34:22,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:22,888 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] [2021-12-22 08:34:22,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-22 08:34:22,888 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 585691284, now seen corresponding path program 1 times [2021-12-22 08:34:22,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:22,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445252036] [2021-12-22 08:34:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:22,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:22,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 08:34:22,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:22,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:22,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:22,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445252036] [2021-12-22 08:34:22,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445252036] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:22,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:22,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 08:34:22,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952884342] [2021-12-22 08:34:22,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:22,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:34:22,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:22,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:34:22,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:22,970 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) [2021-12-22 08:34:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:23,208 INFO L93 Difference]: Finished difference Result 455 states and 585 transitions. [2021-12-22 08:34:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 08:34:23,209 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 [2021-12-22 08:34:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:23,210 INFO L225 Difference]: With dead ends: 455 [2021-12-22 08:34:23,210 INFO L226 Difference]: Without dead ends: 270 [2021-12-22 08:34:23,210 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 [2021-12-22 08:34:23,210 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:23,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 733 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:34:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-12-22 08:34:23,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 264. [2021-12-22 08:34:23,229 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) [2021-12-22 08:34:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 335 transitions. [2021-12-22 08:34:23,229 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 335 transitions. Word has length 68 [2021-12-22 08:34:23,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:23,230 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 335 transitions. [2021-12-22 08:34:23,230 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) [2021-12-22 08:34:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 335 transitions. [2021-12-22 08:34:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-22 08:34:23,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:23,231 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] [2021-12-22 08:34:23,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-12-22 08:34:23,231 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:23,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:23,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1800918031, now seen corresponding path program 1 times [2021-12-22 08:34:23,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:23,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067651617] [2021-12-22 08:34:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:23,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:34:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:23,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:23,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067651617] [2021-12-22 08:34:23,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067651617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:23,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:23,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 08:34:23,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747769021] [2021-12-22 08:34:23,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:23,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:34:23,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:23,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:34:23,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:34:23,296 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) [2021-12-22 08:34:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:23,487 INFO L93 Difference]: Finished difference Result 343 states and 431 transitions. [2021-12-22 08:34:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 08:34:23,488 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 [2021-12-22 08:34:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:23,489 INFO L225 Difference]: With dead ends: 343 [2021-12-22 08:34:23,489 INFO L226 Difference]: Without dead ends: 216 [2021-12-22 08:34:23,489 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 [2021-12-22 08:34:23,489 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 [2021-12-22 08:34:23,489 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] [2021-12-22 08:34:23,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-22 08:34:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 175. [2021-12-22 08:34:23,502 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) [2021-12-22 08:34:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2021-12-22 08:34:23,503 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 70 [2021-12-22 08:34:23,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:23,503 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2021-12-22 08:34:23,503 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) [2021-12-22 08:34:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2021-12-22 08:34:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 08:34:23,504 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:23,504 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] [2021-12-22 08:34:23,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-22 08:34:23,504 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:23,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1069664757, now seen corresponding path program 1 times [2021-12-22 08:34:23,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:23,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912582129] [2021-12-22 08:34:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:23,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:34:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 08:34:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:23,580 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:23,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912582129] [2021-12-22 08:34:23,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912582129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:23,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:23,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 08:34:23,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431162428] [2021-12-22 08:34:23,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:23,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:34:23,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:34:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:23,582 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) [2021-12-22 08:34:23,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:23,782 INFO L93 Difference]: Finished difference Result 224 states and 267 transitions. [2021-12-22 08:34:23,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 08:34:23,782 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 [2021-12-22 08:34:23,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:23,783 INFO L225 Difference]: With dead ends: 224 [2021-12-22 08:34:23,783 INFO L226 Difference]: Without dead ends: 185 [2021-12-22 08:34:23,783 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 [2021-12-22 08:34:23,783 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 [2021-12-22 08:34:23,783 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] [2021-12-22 08:34:23,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-22 08:34:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 173. [2021-12-22 08:34:23,797 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) [2021-12-22 08:34:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 204 transitions. [2021-12-22 08:34:23,797 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 204 transitions. Word has length 84 [2021-12-22 08:34:23,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:23,798 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 204 transitions. [2021-12-22 08:34:23,798 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) [2021-12-22 08:34:23,798 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 204 transitions. [2021-12-22 08:34:23,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-22 08:34:23,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:23,799 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] [2021-12-22 08:34:23,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-12-22 08:34:23,799 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:23,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:23,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1463540250, now seen corresponding path program 1 times [2021-12-22 08:34:23,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:23,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081870109] [2021-12-22 08:34:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:23,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-22 08:34:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:34:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-22 08:34:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:23,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:34:23,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:23,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081870109] [2021-12-22 08:34:23,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081870109] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:23,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:23,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 08:34:23,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693308381] [2021-12-22 08:34:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:23,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:34:23,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:34:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:23,882 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) [2021-12-22 08:34:24,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:24,089 INFO L93 Difference]: Finished difference Result 201 states and 234 transitions. [2021-12-22 08:34:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 08:34:24,090 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 [2021-12-22 08:34:24,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:24,090 INFO L225 Difference]: With dead ends: 201 [2021-12-22 08:34:24,090 INFO L226 Difference]: Without dead ends: 153 [2021-12-22 08:34:24,091 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 [2021-12-22 08:34:24,091 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:24,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 989 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:34:24,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-22 08:34:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2021-12-22 08:34:24,102 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) [2021-12-22 08:34:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 160 transitions. [2021-12-22 08:34:24,102 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 160 transitions. Word has length 86 [2021-12-22 08:34:24,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:24,103 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 160 transitions. [2021-12-22 08:34:24,103 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) [2021-12-22 08:34:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 160 transitions. [2021-12-22 08:34:24,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 08:34:24,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:24,104 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] [2021-12-22 08:34:24,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-12-22 08:34:24,104 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:24,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1416419599, now seen corresponding path program 1 times [2021-12-22 08:34:24,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:24,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438752082] [2021-12-22 08:34:24,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:24,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 08:34:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 08:34:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:34:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 08:34:24,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 08:34:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:34:24,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438752082] [2021-12-22 08:34:24,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438752082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:34:24,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521655152] [2021-12-22 08:34:24,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:24,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:34:24,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:34:24,179 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) [2021-12-22 08:34:24,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 08:34:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:34:24,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:34:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 08:34:24,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:34:24,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521655152] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:24,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:34:24,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-22 08:34:24,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573027835] [2021-12-22 08:34:24,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:24,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:34:24,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:34:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:24,441 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) [2021-12-22 08:34:24,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:24,460 INFO L93 Difference]: Finished difference Result 205 states and 238 transitions. [2021-12-22 08:34:24,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:34:24,460 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 [2021-12-22 08:34:24,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:24,461 INFO L225 Difference]: With dead ends: 205 [2021-12-22 08:34:24,461 INFO L226 Difference]: Without dead ends: 170 [2021-12-22 08:34:24,461 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 [2021-12-22 08:34:24,461 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 [2021-12-22 08:34:24,461 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] [2021-12-22 08:34:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-22 08:34:24,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2021-12-22 08:34:24,473 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) [2021-12-22 08:34:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2021-12-22 08:34:24,473 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 103 [2021-12-22 08:34:24,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:24,473 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2021-12-22 08:34:24,474 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) [2021-12-22 08:34:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2021-12-22 08:34:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 08:34:24,474 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:24,475 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] [2021-12-22 08:34:24,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 08:34:24,677 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 [2021-12-22 08:34:24,678 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:24,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:24,678 INFO L85 PathProgramCache]: Analyzing trace with hash -479392400, now seen corresponding path program 1 times [2021-12-22 08:34:24,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:24,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144293266] [2021-12-22 08:34:24,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:24,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:24,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 08:34:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 08:34:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:34:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 08:34:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 08:34:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:34:24,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144293266] [2021-12-22 08:34:24,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144293266] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:34:24,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253471668] [2021-12-22 08:34:24,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:24,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:34:24,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:34:24,799 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) [2021-12-22 08:34:24,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 08:34:24,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:24,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:34:24,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:34:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 08:34:25,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:34:25,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253471668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:25,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:34:25,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-22 08:34:25,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782592702] [2021-12-22 08:34:25,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:25,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:34:25,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:25,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:34:25,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:34:25,058 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) [2021-12-22 08:34:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:25,100 INFO L93 Difference]: Finished difference Result 203 states and 228 transitions. [2021-12-22 08:34:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:34:25,103 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 [2021-12-22 08:34:25,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:25,104 INFO L225 Difference]: With dead ends: 203 [2021-12-22 08:34:25,104 INFO L226 Difference]: Without dead ends: 170 [2021-12-22 08:34:25,104 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 [2021-12-22 08:34:25,105 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 [2021-12-22 08:34:25,105 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] [2021-12-22 08:34:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-12-22 08:34:25,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2021-12-22 08:34:25,120 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) [2021-12-22 08:34:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 168 transitions. [2021-12-22 08:34:25,121 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 168 transitions. Word has length 103 [2021-12-22 08:34:25,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:25,121 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 168 transitions. [2021-12-22 08:34:25,121 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) [2021-12-22 08:34:25,121 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 168 transitions. [2021-12-22 08:34:25,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-22 08:34:25,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:25,122 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] [2021-12-22 08:34:25,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:34:25,339 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 [2021-12-22 08:34:25,340 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:25,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:25,340 INFO L85 PathProgramCache]: Analyzing trace with hash 506808435, now seen corresponding path program 1 times [2021-12-22 08:34:25,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:25,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323280182] [2021-12-22 08:34:25,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:25,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 08:34:25,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 08:34:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:34:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 08:34:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 08:34:25,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 08:34:25,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:25,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323280182] [2021-12-22 08:34:25,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323280182] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:34:25,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491562441] [2021-12-22 08:34:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:25,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:34:25,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:34:25,408 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) [2021-12-22 08:34:25,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 08:34:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:25,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:34:25,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:34:25,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-22 08:34:25,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:34:25,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491562441] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:25,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:34:25,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2021-12-22 08:34:25,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065924466] [2021-12-22 08:34:25,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:25,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:34:25,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:34:25,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:34:25,670 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) [2021-12-22 08:34:25,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:25,743 INFO L93 Difference]: Finished difference Result 283 states and 318 transitions. [2021-12-22 08:34:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:34:25,743 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 [2021-12-22 08:34:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:25,744 INFO L225 Difference]: With dead ends: 283 [2021-12-22 08:34:25,744 INFO L226 Difference]: Without dead ends: 151 [2021-12-22 08:34:25,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:25,745 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 [2021-12-22 08:34:25,745 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] [2021-12-22 08:34:25,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-22 08:34:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-22 08:34:25,757 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) [2021-12-22 08:34:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 166 transitions. [2021-12-22 08:34:25,758 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 166 transitions. Word has length 103 [2021-12-22 08:34:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:25,758 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 166 transitions. [2021-12-22 08:34:25,758 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) [2021-12-22 08:34:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 166 transitions. [2021-12-22 08:34:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-22 08:34:25,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:25,759 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] [2021-12-22 08:34:25,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-22 08:34:25,976 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 [2021-12-22 08:34:25,976 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:25,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:25,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1772033550, now seen corresponding path program 1 times [2021-12-22 08:34:25,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:25,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799827021] [2021-12-22 08:34:25,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:25,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 08:34:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:34:26,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:34:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 08:34:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 08:34:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 08:34:26,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:26,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799827021] [2021-12-22 08:34:26,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799827021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:26,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:26,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-22 08:34:26,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555666493] [2021-12-22 08:34:26,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:26,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 08:34:26,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 08:34:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-12-22 08:34:26,077 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) [2021-12-22 08:34:26,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:26,340 INFO L93 Difference]: Finished difference Result 300 states and 328 transitions. [2021-12-22 08:34:26,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 08:34:26,341 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 [2021-12-22 08:34:26,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:26,341 INFO L225 Difference]: With dead ends: 300 [2021-12-22 08:34:26,341 INFO L226 Difference]: Without dead ends: 151 [2021-12-22 08:34:26,342 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 [2021-12-22 08:34:26,342 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 [2021-12-22 08:34:26,342 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] [2021-12-22 08:34:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-12-22 08:34:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2021-12-22 08:34:26,355 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) [2021-12-22 08:34:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 165 transitions. [2021-12-22 08:34:26,355 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 165 transitions. Word has length 104 [2021-12-22 08:34:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:26,355 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 165 transitions. [2021-12-22 08:34:26,355 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) [2021-12-22 08:34:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 165 transitions. [2021-12-22 08:34:26,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-22 08:34:26,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:34:26,356 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] [2021-12-22 08:34:26,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-12-22 08:34:26,356 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:34:26,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:34:26,357 INFO L85 PathProgramCache]: Analyzing trace with hash 125463216, now seen corresponding path program 1 times [2021-12-22 08:34:26,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:34:26,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879104264] [2021-12-22 08:34:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:34:26,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:34:26,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 08:34:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:34:26,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 08:34:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 08:34:26,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:34:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:34:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 08:34:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 08:34:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:34:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 08:34:26,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:34:26,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879104264] [2021-12-22 08:34:26,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879104264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:34:26,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:34:26,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-12-22 08:34:26,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623758293] [2021-12-22 08:34:26,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:34:26,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:34:26,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:34:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:34:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:34:26,488 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) [2021-12-22 08:34:26,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:34:26,740 INFO L93 Difference]: Finished difference Result 151 states and 165 transitions. [2021-12-22 08:34:26,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:34:26,741 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 [2021-12-22 08:34:26,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:34:26,741 INFO L225 Difference]: With dead ends: 151 [2021-12-22 08:34:26,741 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 08:34:26,741 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 [2021-12-22 08:34:26,742 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:34:26,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 564 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 08:34:26,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 08:34:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 08:34:26,743 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) [2021-12-22 08:34:26,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 08:34:26,743 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 104 [2021-12-22 08:34:26,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:34:26,743 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 08:34:26,744 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) [2021-12-22 08:34:26,744 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 08:34:26,744 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 08:34:26,746 INFO L764 garLoopResultBuilder]: Registering result SAFE for location errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-22 08:34:26,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-12-22 08:34:26,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.