./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.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 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 02:56:01,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 02:56:01,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 02:56:01,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 02:56:01,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 02:56:01,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 02:56:01,290 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 02:56:01,291 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 02:56:01,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 02:56:01,293 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 02:56:01,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 02:56:01,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 02:56:01,294 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 02:56:01,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 02:56:01,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 02:56:01,297 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 02:56:01,297 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 02:56:01,298 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 02:56:01,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 02:56:01,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 02:56:01,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 02:56:01,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 02:56:01,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 02:56:01,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 02:56:01,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 02:56:01,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 02:56:01,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 02:56:01,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 02:56:01,308 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 02:56:01,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 02:56:01,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 02:56:01,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 02:56:01,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 02:56:01,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 02:56:01,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 02:56:01,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 02:56:01,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 02:56:01,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 02:56:01,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 02:56:01,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 02:56:01,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 02:56:01,313 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 02:56:01,326 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 02:56:01,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 02:56:01,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 02:56:01,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 02:56:01,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 02:56:01,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 02:56:01,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 02:56:01,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 02:56:01,329 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 02:56:01,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 02:56:01,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 02:56:01,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 02:56:01,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 02:56:01,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 02:56:01,329 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 02:56:01,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 02:56:01,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 02:56:01,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 02:56:01,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 02:56:01,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 02:56:01,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 02:56:01,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 02:56:01,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 02:56:01,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 02:56:01,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:56:01,331 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 02:56:01,331 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 02:56:01,331 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 02:56:01,332 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 02:56:01,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 02:56:01,332 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 02:56:01,332 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 02:56:01,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 02:56:01,332 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 02:56:01,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 13096ecc896a778cf08851ae14dc5c7b87ba00c42e74b90edd25cd2cb7c21f17 [2021-12-17 02:56:01,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 02:56:01,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 02:56:01,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 02:56:01,617 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 02:56:01,618 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 02:56:01,619 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-12-17 02:56:01,684 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e729447e3/0cdc0eac30d147f089630660d9750c62/FLAG4eac04bc7 [2021-12-17 02:56:02,218 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 02:56:02,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/floppy.i.cil-3.c [2021-12-17 02:56:02,243 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e729447e3/0cdc0eac30d147f089630660d9750c62/FLAG4eac04bc7 [2021-12-17 02:56:02,466 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e729447e3/0cdc0eac30d147f089630660d9750c62 [2021-12-17 02:56:02,468 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 02:56:02,470 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 02:56:02,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 02:56:02,472 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 02:56:02,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 02:56:02,474 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:56:02" (1/1) ... [2021-12-17 02:56:02,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40b1038a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:02, skipping insertion in model container [2021-12-17 02:56:02,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 02:56:02" (1/1) ... [2021-12-17 02:56:02,481 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 02:56:02,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 02:56:03,012 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/floppy.i.cil-3.c[77246,77259] [2021-12-17 02:56:03,340 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:56:03,384 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 02:56:03,413 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/floppy.i.cil-3.c[77246,77259] [2021-12-17 02:56:03,580 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 02:56:03,650 INFO L208 MainTranslator]: Completed translation [2021-12-17 02:56:03,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03 WrapperNode [2021-12-17 02:56:03,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 02:56:03,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 02:56:03,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 02:56:03,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 02:56:03,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:03,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:03,843 INFO L137 Inliner]: procedures = 128, calls = 2887, calls flagged for inlining = 37, calls inlined = 26, statements flattened = 3086 [2021-12-17 02:56:03,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 02:56:03,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 02:56:03,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 02:56:03,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 02:56:03,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:03,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:03,889 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:03,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:03,999 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:04,011 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:04,024 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:04,047 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 02:56:04,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 02:56:04,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 02:56:04,048 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 02:56:04,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (1/1) ... [2021-12-17 02:56:04,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 02:56:04,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 02:56:04,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 02:56:04,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 02:56:04,206 INFO L130 BoogieDeclarations]: Found specification of procedure IoGetConfigurationInformation [2021-12-17 02:56:04,206 INFO L138 BoogieDeclarations]: Found implementation of procedure IoGetConfigurationInformation [2021-12-17 02:56:04,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-17 02:56:04,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-17 02:56:04,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-17 02:56:04,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 02:56:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-17 02:56:04,207 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-17 02:56:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure IoSetDeviceInterfaceState [2021-12-17 02:56:04,207 INFO L138 BoogieDeclarations]: Found implementation of procedure IoSetDeviceInterfaceState [2021-12-17 02:56:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyCreateClose [2021-12-17 02:56:04,207 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyCreateClose [2021-12-17 02:56:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 02:56:04,207 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyPnpComplete [2021-12-17 02:56:04,208 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyPnpComplete [2021-12-17 02:56:04,208 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-17 02:56:04,208 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-17 02:56:04,208 INFO L130 BoogieDeclarations]: Found specification of procedure InterlockedExchange [2021-12-17 02:56:04,208 INFO L138 BoogieDeclarations]: Found implementation of procedure InterlockedExchange [2021-12-17 02:56:04,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-17 02:56:04,208 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-17 02:56:04,208 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-17 02:56:04,208 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-17 02:56:04,209 INFO L130 BoogieDeclarations]: Found specification of procedure FlQueueIrpToThread [2021-12-17 02:56:04,209 INFO L138 BoogieDeclarations]: Found implementation of procedure FlQueueIrpToThread [2021-12-17 02:56:04,209 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyDeviceControl [2021-12-17 02:56:04,209 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyDeviceControl [2021-12-17 02:56:04,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 02:56:04,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 02:56:04,209 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyProcessQueuedRequests [2021-12-17 02:56:04,209 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyProcessQueuedRequests [2021-12-17 02:56:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure ExfInterlockedInsertTailList [2021-12-17 02:56:04,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ExfInterlockedInsertTailList [2021-12-17 02:56:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 02:56:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 02:56:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-17 02:56:04,210 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-17 02:56:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 02:56:04,210 INFO L130 BoogieDeclarations]: Found specification of procedure FlFdcDeviceIo [2021-12-17 02:56:04,210 INFO L138 BoogieDeclarations]: Found implementation of procedure FlFdcDeviceIo [2021-12-17 02:56:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 02:56:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure KeWaitForSingleObject [2021-12-17 02:56:04,211 INFO L138 BoogieDeclarations]: Found implementation of procedure KeWaitForSingleObject [2021-12-17 02:56:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memmove [2021-12-17 02:56:04,211 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memmove [2021-12-17 02:56:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 02:56:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy_guard [2021-12-17 02:56:04,211 INFO L138 BoogieDeclarations]: Found implementation of procedure memcpy_guard [2021-12-17 02:56:04,211 INFO L130 BoogieDeclarations]: Found specification of procedure FloppyQueueRequest [2021-12-17 02:56:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure FloppyQueueRequest [2021-12-17 02:56:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-17 02:56:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure ExAllocatePoolWithTag [2021-12-17 02:56:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ExAllocatePoolWithTag [2021-12-17 02:56:04,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 02:56:04,212 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 02:56:04,539 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 02:56:04,541 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 02:56:04,593 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,601 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-17 02:56:04,601 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-17 02:56:04,604 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,723 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-12-17 02:56:04,723 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-12-17 02:56:04,741 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,751 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##16: assume !false; [2021-12-17 02:56:04,751 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##15: assume false; [2021-12-17 02:56:04,810 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,828 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2021-12-17 02:56:04,828 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2021-12-17 02:56:04,829 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,829 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,830 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,897 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2021-12-17 02:56:04,898 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##24: assume !false; [2021-12-17 02:56:04,898 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##23: assume false; [2021-12-17 02:56:04,898 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2021-12-17 02:56:04,898 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2021-12-17 02:56:04,898 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2021-12-17 02:56:04,899 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,903 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:04,904 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,581 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##38: assume !false; [2021-12-17 02:56:07,581 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##37: assume false; [2021-12-17 02:56:07,581 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2021-12-17 02:56:07,581 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2021-12-17 02:56:07,582 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##124: assume !false; [2021-12-17 02:56:07,582 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##123: assume false; [2021-12-17 02:56:07,611 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,638 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2021-12-17 02:56:07,638 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2021-12-17 02:56:07,645 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,646 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,647 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,648 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,648 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,650 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,650 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:07,652 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##97: assume !false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##96: assume false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##76: assume false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##177: assume !false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##176: assume false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##77: assume !false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##48: assume !false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##47: assume false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##27: assume !false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##26: assume false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##162: assume false; [2021-12-17 02:56:10,743 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##163: assume !false; [2021-12-17 02:56:10,744 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##210: assume false; [2021-12-17 02:56:10,744 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##211: assume !false; [2021-12-17 02:56:10,744 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##108: assume !false; [2021-12-17 02:56:10,744 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##107: assume false; [2021-12-17 02:56:10,751 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 02:56:10,768 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 02:56:10,770 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 02:56:10,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:56:10 BoogieIcfgContainer [2021-12-17 02:56:10,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 02:56:10,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 02:56:10,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 02:56:10,779 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 02:56:10,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 02:56:02" (1/3) ... [2021-12-17 02:56:10,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48be3c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:56:10, skipping insertion in model container [2021-12-17 02:56:10,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 02:56:03" (2/3) ... [2021-12-17 02:56:10,785 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48be3c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 02:56:10, skipping insertion in model container [2021-12-17 02:56:10,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 02:56:10" (3/3) ... [2021-12-17 02:56:10,787 INFO L111 eAbstractionObserver]: Analyzing ICFG floppy.i.cil-3.c [2021-12-17 02:56:10,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 02:56:10,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 02:56:10,823 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 02:56:10,829 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 02:56:10,829 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 02:56:10,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2021-12-17 02:56:10,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 02:56:10,851 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:10,851 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] [2021-12-17 02:56:10,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:10,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1811520219, now seen corresponding path program 1 times [2021-12-17 02:56:10,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:10,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055552617] [2021-12-17 02:56:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:10,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:11,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:11,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:11,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:11,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055552617] [2021-12-17 02:56:11,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055552617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:11,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:11,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:56:11,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415233525] [2021-12-17 02:56:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:11,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:56:11,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:56:11,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:56:11,439 INFO L87 Difference]: Start difference. First operand has 580 states, 463 states have (on average 1.4989200863930885) internal successors, (694), 496 states have internal predecessors, (694), 95 states have call successors, (95), 20 states have call predecessors, (95), 20 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:15,724 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:16,057 INFO L93 Difference]: Finished difference Result 1174 states and 1848 transitions. [2021-12-17 02:56:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:56:16,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 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 26 [2021-12-17 02:56:16,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:16,071 INFO L225 Difference]: With dead ends: 1174 [2021-12-17 02:56:16,071 INFO L226 Difference]: Without dead ends: 657 [2021-12-17 02:56:16,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:56:16,079 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 400 mSDsluCounter, 1454 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 238 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:16,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 2225 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 716 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-12-17 02:56:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-12-17 02:56:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2021-12-17 02:56:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4567099567099566) internal successors, (673), 493 states have internal predecessors, (673), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-17 02:56:16,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 840 transitions. [2021-12-17 02:56:16,148 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 840 transitions. Word has length 26 [2021-12-17 02:56:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:16,148 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 840 transitions. [2021-12-17 02:56:16,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 840 transitions. [2021-12-17 02:56:16,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 02:56:16,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:16,150 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] [2021-12-17 02:56:16,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 02:56:16,150 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:16,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:16,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1723209200, now seen corresponding path program 1 times [2021-12-17 02:56:16,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:16,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720792275] [2021-12-17 02:56:16,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:16,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:16,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:16,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:16,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:16,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:16,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720792275] [2021-12-17 02:56:16,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720792275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:16,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:16,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:56:16,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109454940] [2021-12-17 02:56:16,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:16,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:56:16,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:16,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:56:16,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:56:16,366 INFO L87 Difference]: Start difference. First operand 579 states and 840 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:20,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:20,806 INFO L93 Difference]: Finished difference Result 1217 states and 1784 transitions. [2021-12-17 02:56:20,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 02:56:20,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2021-12-17 02:56:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:20,813 INFO L225 Difference]: With dead ends: 1217 [2021-12-17 02:56:20,814 INFO L226 Difference]: Without dead ends: 657 [2021-12-17 02:56:20,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:56:20,821 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 366 mSDsluCounter, 2140 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 228 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:20,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 2901 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 850 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 02:56:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-12-17 02:56:20,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 579. [2021-12-17 02:56:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 462 states have (on average 1.4545454545454546) internal successors, (672), 493 states have internal predecessors, (672), 95 states have call successors, (95), 22 states have call predecessors, (95), 21 states have return successors, (72), 70 states have call predecessors, (72), 72 states have call successors, (72) [2021-12-17 02:56:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 839 transitions. [2021-12-17 02:56:20,871 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 839 transitions. Word has length 29 [2021-12-17 02:56:20,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:20,871 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 839 transitions. [2021-12-17 02:56:20,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:20,871 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 839 transitions. [2021-12-17 02:56:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 02:56:20,872 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:20,872 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:20,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 02:56:20,873 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:20,873 INFO L85 PathProgramCache]: Analyzing trace with hash 51194362, now seen corresponding path program 1 times [2021-12-17 02:56:20,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:20,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973247163] [2021-12-17 02:56:20,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:20,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:21,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:21,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:21,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:21,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:21,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:21,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973247163] [2021-12-17 02:56:21,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973247163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:21,105 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:21,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:56:21,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842462766] [2021-12-17 02:56:21,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:21,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:56:21,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:56:21,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:56:21,108 INFO L87 Difference]: Start difference. First operand 579 states and 839 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:24,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:25,677 INFO L93 Difference]: Finished difference Result 1542 states and 2294 transitions. [2021-12-17 02:56:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:56:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2021-12-17 02:56:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:25,684 INFO L225 Difference]: With dead ends: 1542 [2021-12-17 02:56:25,684 INFO L226 Difference]: Without dead ends: 1127 [2021-12-17 02:56:25,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:56:25,686 INFO L933 BasicCegarLoop]: 940 mSDtfsCounter, 1330 mSDsluCounter, 1544 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 426 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1367 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:25,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1367 Valid, 2484 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 973 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2021-12-17 02:56:25,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2021-12-17 02:56:25,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1008. [2021-12-17 02:56:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 832 states have (on average 1.4399038461538463) internal successors, (1198), 859 states have internal predecessors, (1198), 132 states have call successors, (132), 40 states have call predecessors, (132), 43 states have return successors, (155), 116 states have call predecessors, (155), 117 states have call successors, (155) [2021-12-17 02:56:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1485 transitions. [2021-12-17 02:56:25,722 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1485 transitions. Word has length 33 [2021-12-17 02:56:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:25,723 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1485 transitions. [2021-12-17 02:56:25,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1485 transitions. [2021-12-17 02:56:25,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 02:56:25,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:25,725 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:25,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 02:56:25,725 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:25,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:25,726 INFO L85 PathProgramCache]: Analyzing trace with hash -778149095, now seen corresponding path program 1 times [2021-12-17 02:56:25,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:25,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024997230] [2021-12-17 02:56:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:25,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:25,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:25,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:25,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:25,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 02:56:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:25,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:25,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024997230] [2021-12-17 02:56:25,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024997230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:25,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:25,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:56:25,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788545894] [2021-12-17 02:56:25,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:25,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:56:25,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:56:25,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:56:25,997 INFO L87 Difference]: Start difference. First operand 1008 states and 1485 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:56:29,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:30,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:30,205 INFO L93 Difference]: Finished difference Result 1879 states and 2849 transitions. [2021-12-17 02:56:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:56:30,205 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2021-12-17 02:56:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:30,213 INFO L225 Difference]: With dead ends: 1879 [2021-12-17 02:56:30,213 INFO L226 Difference]: Without dead ends: 1860 [2021-12-17 02:56:30,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:56:30,214 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 1460 mSDsluCounter, 1307 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1530 SdHoareTripleChecker+Valid, 2102 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:30,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1530 Valid, 2102 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 771 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-12-17 02:56:30,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2021-12-17 02:56:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1624. [2021-12-17 02:56:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1348 states have (on average 1.4614243323442135) internal successors, (1970), 1393 states have internal predecessors, (1970), 203 states have call successors, (203), 65 states have call predecessors, (203), 72 states have return successors, (264), 178 states have call predecessors, (264), 188 states have call successors, (264) [2021-12-17 02:56:30,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2437 transitions. [2021-12-17 02:56:30,261 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2437 transitions. Word has length 45 [2021-12-17 02:56:30,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:30,262 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 2437 transitions. [2021-12-17 02:56:30,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:56:30,262 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2437 transitions. [2021-12-17 02:56:30,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 02:56:30,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:30,264 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:30,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 02:56:30,264 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:30,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1291674765, now seen corresponding path program 1 times [2021-12-17 02:56:30,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:30,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318300818] [2021-12-17 02:56:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:30,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:30,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:30,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:30,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:30,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:30,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318300818] [2021-12-17 02:56:30,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318300818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:30,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:30,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:56:30,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854352144] [2021-12-17 02:56:30,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:30,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:56:30,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:30,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:56:30,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:56:30,432 INFO L87 Difference]: Start difference. First operand 1624 states and 2437 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:33,978 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:34,411 INFO L93 Difference]: Finished difference Result 1856 states and 2829 transitions. [2021-12-17 02:56:34,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:56:34,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2021-12-17 02:56:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:34,420 INFO L225 Difference]: With dead ends: 1856 [2021-12-17 02:56:34,421 INFO L226 Difference]: Without dead ends: 1852 [2021-12-17 02:56:34,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:56:34,423 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 467 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 246 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:34,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 2099 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 711 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-12-17 02:56:34,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1852 states. [2021-12-17 02:56:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1852 to 1657. [2021-12-17 02:56:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 1379 states have (on average 1.4612037708484409) internal successors, (2015), 1421 states have internal predecessors, (2015), 204 states have call successors, (204), 67 states have call predecessors, (204), 73 states have return successors, (265), 179 states have call predecessors, (265), 189 states have call successors, (265) [2021-12-17 02:56:34,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2484 transitions. [2021-12-17 02:56:34,471 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2484 transitions. Word has length 43 [2021-12-17 02:56:34,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:34,471 INFO L470 AbstractCegarLoop]: Abstraction has 1657 states and 2484 transitions. [2021-12-17 02:56:34,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:34,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2484 transitions. [2021-12-17 02:56:34,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-17 02:56:34,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:34,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:34,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 02:56:34,474 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:34,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1850160334, now seen corresponding path program 1 times [2021-12-17 02:56:34,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:34,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349055222] [2021-12-17 02:56:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:34,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:34,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:34,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:34,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349055222] [2021-12-17 02:56:34,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349055222] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:34,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:34,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:56:34,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610691405] [2021-12-17 02:56:34,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:34,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:56:34,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:34,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:56:34,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:56:34,627 INFO L87 Difference]: Start difference. First operand 1657 states and 2484 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:38,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:39,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:39,622 INFO L93 Difference]: Finished difference Result 3293 states and 5099 transitions. [2021-12-17 02:56:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:56:39,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2021-12-17 02:56:39,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:39,636 INFO L225 Difference]: With dead ends: 3293 [2021-12-17 02:56:39,636 INFO L226 Difference]: Without dead ends: 3290 [2021-12-17 02:56:39,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:56:39,639 INFO L933 BasicCegarLoop]: 1177 mSDtfsCounter, 925 mSDsluCounter, 1851 mSDsCounter, 0 mSdLazyCounter, 1114 mSolverCounterSat, 310 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 954 SdHoareTripleChecker+Valid, 3028 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 1114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:39,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [954 Valid, 3028 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 1114 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 02:56:39,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3290 states. [2021-12-17 02:56:39,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3290 to 2657. [2021-12-17 02:56:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2657 states, 2246 states have (on average 1.4746215494211932) internal successors, (3312), 2298 states have internal predecessors, (3312), 292 states have call successors, (292), 107 states have call predecessors, (292), 118 states have return successors, (418), 262 states have call predecessors, (418), 277 states have call successors, (418) [2021-12-17 02:56:39,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2657 states to 2657 states and 4022 transitions. [2021-12-17 02:56:39,720 INFO L78 Accepts]: Start accepts. Automaton has 2657 states and 4022 transitions. Word has length 45 [2021-12-17 02:56:39,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:39,721 INFO L470 AbstractCegarLoop]: Abstraction has 2657 states and 4022 transitions. [2021-12-17 02:56:39,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:56:39,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2657 states and 4022 transitions. [2021-12-17 02:56:39,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 02:56:39,722 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:39,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:39,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 02:56:39,723 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:39,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1615003555, now seen corresponding path program 1 times [2021-12-17 02:56:39,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:39,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630691785] [2021-12-17 02:56:39,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:39,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:39,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:39,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:39,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 02:56:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:39,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:56:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:39,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:39,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630691785] [2021-12-17 02:56:39,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630691785] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:39,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:39,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:56:39,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430951117] [2021-12-17 02:56:39,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:39,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:56:39,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:56:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:56:39,917 INFO L87 Difference]: Start difference. First operand 2657 states and 4022 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:56:43,797 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:45,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:45,671 INFO L93 Difference]: Finished difference Result 3942 states and 6165 transitions. [2021-12-17 02:56:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 02:56:45,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-12-17 02:56:45,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:45,685 INFO L225 Difference]: With dead ends: 3942 [2021-12-17 02:56:45,685 INFO L226 Difference]: Without dead ends: 3937 [2021-12-17 02:56:45,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-12-17 02:56:45,687 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1251 mSDsluCounter, 1869 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 602 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1272 SdHoareTripleChecker+Valid, 2952 SdHoareTripleChecker+Invalid, 2193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:45,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1272 Valid, 2952 Invalid, 2193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 1590 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-12-17 02:56:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3937 states. [2021-12-17 02:56:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3937 to 3272. [2021-12-17 02:56:45,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3272 states, 2761 states have (on average 1.4791742122419413) internal successors, (4084), 2832 states have internal predecessors, (4084), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2021-12-17 02:56:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3272 states to 3272 states and 5005 transitions. [2021-12-17 02:56:45,780 INFO L78 Accepts]: Start accepts. Automaton has 3272 states and 5005 transitions. Word has length 48 [2021-12-17 02:56:45,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:45,780 INFO L470 AbstractCegarLoop]: Abstraction has 3272 states and 5005 transitions. [2021-12-17 02:56:45,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:56:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3272 states and 5005 transitions. [2021-12-17 02:56:45,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 02:56:45,781 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:45,782 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:45,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 02:56:45,782 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1759276290, now seen corresponding path program 1 times [2021-12-17 02:56:45,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:45,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260836305] [2021-12-17 02:56:45,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:45,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:45,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:45,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:45,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:45,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:45,940 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:45,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260836305] [2021-12-17 02:56:45,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260836305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:45,940 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:45,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:56:45,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081185108] [2021-12-17 02:56:45,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:45,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:56:45,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:56:45,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:56:45,942 INFO L87 Difference]: Start difference. First operand 3272 states and 5005 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 4 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:49,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:51,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:52,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:52,802 INFO L93 Difference]: Finished difference Result 7046 states and 10914 transitions. [2021-12-17 02:56:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:56:52,803 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2021-12-17 02:56:52,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:52,821 INFO L225 Difference]: With dead ends: 7046 [2021-12-17 02:56:52,821 INFO L226 Difference]: Without dead ends: 4021 [2021-12-17 02:56:52,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:56:52,834 INFO L933 BasicCegarLoop]: 903 mSDtfsCounter, 2317 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 770 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2364 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:52,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2364 Valid, 2288 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 1156 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2021-12-17 02:56:52,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4021 states. [2021-12-17 02:56:52,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4021 to 3266. [2021-12-17 02:56:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3266 states, 2755 states have (on average 1.4773139745916515) internal successors, (4070), 2826 states have internal predecessors, (4070), 364 states have call successors, (364), 126 states have call predecessors, (364), 146 states have return successors, (557), 324 states have call predecessors, (557), 349 states have call successors, (557) [2021-12-17 02:56:52,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3266 states to 3266 states and 4991 transitions. [2021-12-17 02:56:52,999 INFO L78 Accepts]: Start accepts. Automaton has 3266 states and 4991 transitions. Word has length 46 [2021-12-17 02:56:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:53,000 INFO L470 AbstractCegarLoop]: Abstraction has 3266 states and 4991 transitions. [2021-12-17 02:56:53,000 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), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:56:53,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3266 states and 4991 transitions. [2021-12-17 02:56:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-17 02:56:53,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:53,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:53,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 02:56:53,002 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:53,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:53,002 INFO L85 PathProgramCache]: Analyzing trace with hash 436509709, now seen corresponding path program 1 times [2021-12-17 02:56:53,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:53,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268221266] [2021-12-17 02:56:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:53,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:53,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:53,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:53,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:53,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:53,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-17 02:56:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:53,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:53,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268221266] [2021-12-17 02:56:53,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268221266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:53,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:53,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:56:53,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447727360] [2021-12-17 02:56:53,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:53,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:56:53,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:56:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:56:53,183 INFO L87 Difference]: Start difference. First operand 3266 states and 4991 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:56:56,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:56:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:56:58,731 INFO L93 Difference]: Finished difference Result 10834 states and 17245 transitions. [2021-12-17 02:56:58,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:56:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-12-17 02:56:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:56:58,780 INFO L225 Difference]: With dead ends: 10834 [2021-12-17 02:56:58,780 INFO L226 Difference]: Without dead ends: 7785 [2021-12-17 02:56:58,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:56:58,798 INFO L933 BasicCegarLoop]: 954 mSDtfsCounter, 2093 mSDsluCounter, 1816 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 707 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2169 SdHoareTripleChecker+Valid, 2770 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:56:58,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2169 Valid, 2770 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 1180 Invalid, 1 Unknown, 0 Unchecked, 5.1s Time] [2021-12-17 02:56:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7785 states. [2021-12-17 02:56:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7785 to 6900. [2021-12-17 02:56:59,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4893324156916723) internal successors, (8656), 6037 states have internal predecessors, (8656), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2021-12-17 02:56:59,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10848 transitions. [2021-12-17 02:56:59,075 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10848 transitions. Word has length 47 [2021-12-17 02:56:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:56:59,076 INFO L470 AbstractCegarLoop]: Abstraction has 6900 states and 10848 transitions. [2021-12-17 02:56:59,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-17 02:56:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10848 transitions. [2021-12-17 02:56:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 02:56:59,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:56:59,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:56:59,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 02:56:59,078 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:56:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:56:59,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1335861569, now seen corresponding path program 1 times [2021-12-17 02:56:59,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:56:59,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8886654] [2021-12-17 02:56:59,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:56:59,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:56:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:59,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:56:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:59,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:56:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:59,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 02:56:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:59,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:56:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:56:59,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:56:59,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:56:59,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8886654] [2021-12-17 02:56:59,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8886654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:56:59,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:56:59,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:56:59,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478197203] [2021-12-17 02:56:59,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:56:59,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:56:59,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:56:59,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:56:59,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:56:59,278 INFO L87 Difference]: Start difference. First operand 6900 states and 10848 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:57:03,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:05,418 INFO L93 Difference]: Finished difference Result 7819 states and 12472 transitions. [2021-12-17 02:57:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 02:57:05,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-12-17 02:57:05,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:05,442 INFO L225 Difference]: With dead ends: 7819 [2021-12-17 02:57:05,442 INFO L226 Difference]: Without dead ends: 7813 [2021-12-17 02:57:05,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2021-12-17 02:57:05,448 INFO L933 BasicCegarLoop]: 1056 mSDtfsCounter, 2724 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 2034 mSolverCounterSat, 1105 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2786 SdHoareTripleChecker+Valid, 3227 SdHoareTripleChecker+Invalid, 3140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1105 IncrementalHoareTripleChecker+Valid, 2034 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:05,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2786 Valid, 3227 Invalid, 3140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1105 Valid, 2034 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2021-12-17 02:57:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7813 states. [2021-12-17 02:57:05,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7813 to 6900. [2021-12-17 02:57:05,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.4891603578802477) internal successors, (8655), 6037 states have internal predecessors, (8655), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2021-12-17 02:57:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10847 transitions. [2021-12-17 02:57:05,713 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10847 transitions. Word has length 48 [2021-12-17 02:57:05,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:05,714 INFO L470 AbstractCegarLoop]: Abstraction has 6900 states and 10847 transitions. [2021-12-17 02:57:05,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 5 states have internal predecessors, (39), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:57:05,714 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10847 transitions. [2021-12-17 02:57:05,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-17 02:57:05,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:05,716 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:05,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 02:57:05,717 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:05,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:05,717 INFO L85 PathProgramCache]: Analyzing trace with hash 677869713, now seen corresponding path program 1 times [2021-12-17 02:57:05,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:05,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000587006] [2021-12-17 02:57:05,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:05,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:05,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:05,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:57:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:05,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:57:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:05,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 02:57:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:05,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:57:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:05,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:05,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000587006] [2021-12-17 02:57:05,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000587006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:05,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:05,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:57:05,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073979022] [2021-12-17 02:57:05,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:05,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:57:05,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:57:05,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:57:05,925 INFO L87 Difference]: Start difference. First operand 6900 states and 10847 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:57:10,418 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:12,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:15,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:15,224 INFO L93 Difference]: Finished difference Result 7815 states and 12466 transitions. [2021-12-17 02:57:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 02:57:15,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2021-12-17 02:57:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:15,246 INFO L225 Difference]: With dead ends: 7815 [2021-12-17 02:57:15,246 INFO L226 Difference]: Without dead ends: 7809 [2021-12-17 02:57:15,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2021-12-17 02:57:15,251 INFO L933 BasicCegarLoop]: 1056 mSDtfsCounter, 2322 mSDsluCounter, 2516 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 849 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2385 SdHoareTripleChecker+Valid, 3572 SdHoareTripleChecker+Invalid, 3417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:15,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2385 Valid, 3572 Invalid, 3417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 2566 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2021-12-17 02:57:15,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7809 states. [2021-12-17 02:57:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7809 to 6900. [2021-12-17 02:57:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 5812 states have (on average 1.488988300068823) internal successors, (8654), 6037 states have internal predecessors, (8654), 801 states have call successors, (801), 234 states have call predecessors, (801), 286 states have return successors, (1391), 659 states have call predecessors, (1391), 789 states have call successors, (1391) [2021-12-17 02:57:15,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 10846 transitions. [2021-12-17 02:57:15,522 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 10846 transitions. Word has length 49 [2021-12-17 02:57:15,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:15,523 INFO L470 AbstractCegarLoop]: Abstraction has 6900 states and 10846 transitions. [2021-12-17 02:57:15,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 5 states have internal predecessors, (40), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:57:15,523 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 10846 transitions. [2021-12-17 02:57:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-17 02:57:15,524 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:15,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:15,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 02:57:15,524 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:15,525 INFO L85 PathProgramCache]: Analyzing trace with hash -376802648, now seen corresponding path program 1 times [2021-12-17 02:57:15,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:15,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917892710] [2021-12-17 02:57:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:15,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:15,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:57:15,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:15,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:57:15,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:15,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 02:57:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:15,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:57:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:15,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:15,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:15,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917892710] [2021-12-17 02:57:15,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917892710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:15,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:15,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:57:15,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830938924] [2021-12-17 02:57:15,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:15,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:57:15,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:57:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:57:15,715 INFO L87 Difference]: Start difference. First operand 6900 states and 10846 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:57:19,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:21,806 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:22,731 INFO L93 Difference]: Finished difference Result 7824 states and 12487 transitions. [2021-12-17 02:57:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:57:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2021-12-17 02:57:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:22,752 INFO L225 Difference]: With dead ends: 7824 [2021-12-17 02:57:22,752 INFO L226 Difference]: Without dead ends: 7807 [2021-12-17 02:57:22,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:57:22,758 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 683 mSDsluCounter, 3055 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 278 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 3767 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:22,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 3767 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1886 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-12-17 02:57:22,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7807 states. [2021-12-17 02:57:22,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7807 to 6904. [2021-12-17 02:57:22,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 5815 states have (on average 1.4885640584694755) internal successors, (8656), 6042 states have internal predecessors, (8656), 800 states have call successors, (800), 234 states have call predecessors, (800), 288 states have return successors, (1397), 658 states have call predecessors, (1397), 788 states have call successors, (1397) [2021-12-17 02:57:23,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 10853 transitions. [2021-12-17 02:57:23,004 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 10853 transitions. Word has length 50 [2021-12-17 02:57:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:23,005 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 10853 transitions. [2021-12-17 02:57:23,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:57:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 10853 transitions. [2021-12-17 02:57:23,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 02:57:23,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:23,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:23,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 02:57:23,007 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:23,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:23,007 INFO L85 PathProgramCache]: Analyzing trace with hash 286289769, now seen corresponding path program 1 times [2021-12-17 02:57:23,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:23,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330623909] [2021-12-17 02:57:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:23,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:57:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:57:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:23,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 02:57:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:23,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 02:57:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:23,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:23,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330623909] [2021-12-17 02:57:23,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330623909] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:23,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:23,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:57:23,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812069930] [2021-12-17 02:57:23,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:23,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:57:23,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:23,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:57:23,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:57:23,289 INFO L87 Difference]: Start difference. First operand 6904 states and 10853 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:57:27,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:29,998 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:30,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:30,939 INFO L93 Difference]: Finished difference Result 7822 states and 12483 transitions. [2021-12-17 02:57:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:57:30,940 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2021-12-17 02:57:30,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:30,962 INFO L225 Difference]: With dead ends: 7822 [2021-12-17 02:57:30,962 INFO L226 Difference]: Without dead ends: 7800 [2021-12-17 02:57:30,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:57:30,969 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 682 mSDsluCounter, 3049 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 273 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 3761 SdHoareTripleChecker+Invalid, 2161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:30,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 3761 Invalid, 2161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 1886 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2021-12-17 02:57:30,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-12-17 02:57:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6897. [2021-12-17 02:57:31,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6897 states, 5811 states have (on average 1.4887282739631733) internal successors, (8651), 6038 states have internal predecessors, (8651), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2021-12-17 02:57:31,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6897 states to 6897 states and 10844 transitions. [2021-12-17 02:57:31,220 INFO L78 Accepts]: Start accepts. Automaton has 6897 states and 10844 transitions. Word has length 51 [2021-12-17 02:57:31,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:31,220 INFO L470 AbstractCegarLoop]: Abstraction has 6897 states and 10844 transitions. [2021-12-17 02:57:31,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:57:31,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6897 states and 10844 transitions. [2021-12-17 02:57:31,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 02:57:31,222 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:31,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:31,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 02:57:31,222 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:31,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1945256571, now seen corresponding path program 1 times [2021-12-17 02:57:31,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:31,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2153001] [2021-12-17 02:57:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:31,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:31,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:57:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:31,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:57:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:31,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:57:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:31,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:31,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:31,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2153001] [2021-12-17 02:57:31,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2153001] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:31,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:31,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:57:31,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121740083] [2021-12-17 02:57:31,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:31,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:57:31,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:31,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:57:31,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:57:31,427 INFO L87 Difference]: Start difference. First operand 6897 states and 10844 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:57:34,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:35,333 INFO L93 Difference]: Finished difference Result 13804 states and 22175 transitions. [2021-12-17 02:57:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:57:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2021-12-17 02:57:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:35,359 INFO L225 Difference]: With dead ends: 13804 [2021-12-17 02:57:35,360 INFO L226 Difference]: Without dead ends: 8064 [2021-12-17 02:57:35,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:57:35,386 INFO L933 BasicCegarLoop]: 714 mSDtfsCounter, 411 mSDsluCounter, 1426 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 236 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2140 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:35,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 2140 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 851 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-12-17 02:57:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8064 states. [2021-12-17 02:57:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8064 to 7053. [2021-12-17 02:57:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7053 states, 5967 states have (on average 1.4799731858555387) internal successors, (8831), 6194 states have internal predecessors, (8831), 798 states have call successors, (798), 233 states have call predecessors, (798), 287 states have return successors, (1395), 656 states have call predecessors, (1395), 786 states have call successors, (1395) [2021-12-17 02:57:35,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7053 states to 7053 states and 11024 transitions. [2021-12-17 02:57:35,700 INFO L78 Accepts]: Start accepts. Automaton has 7053 states and 11024 transitions. Word has length 52 [2021-12-17 02:57:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:35,700 INFO L470 AbstractCegarLoop]: Abstraction has 7053 states and 11024 transitions. [2021-12-17 02:57:35,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:57:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 7053 states and 11024 transitions. [2021-12-17 02:57:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-17 02:57:35,702 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:35,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:35,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 02:57:35,702 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:35,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:35,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1217127572, now seen corresponding path program 1 times [2021-12-17 02:57:35,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:35,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475227867] [2021-12-17 02:57:35,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:35,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:57:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:35,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:57:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:35,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-17 02:57:35,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:35,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:35,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:35,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475227867] [2021-12-17 02:57:35,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475227867] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:35,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:35,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:57:35,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065139377] [2021-12-17 02:57:35,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:35,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:57:35,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:35,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:57:35,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:57:35,908 INFO L87 Difference]: Start difference. First operand 7053 states and 11024 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, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:57:39,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:40,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:40,905 INFO L93 Difference]: Finished difference Result 8020 states and 12715 transitions. [2021-12-17 02:57:40,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:57:40,906 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, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-12-17 02:57:40,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:40,935 INFO L225 Difference]: With dead ends: 8020 [2021-12-17 02:57:40,935 INFO L226 Difference]: Without dead ends: 8002 [2021-12-17 02:57:40,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:57:40,943 INFO L933 BasicCegarLoop]: 710 mSDtfsCounter, 868 mSDsluCounter, 2259 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 374 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 2969 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:40,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [891 Valid, 2969 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1239 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-12-17 02:57:40,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8002 states. [2021-12-17 02:57:41,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8002 to 7051. [2021-12-17 02:57:41,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7051 states, 5966 states have (on average 1.479886020784445) internal successors, (8829), 6193 states have internal predecessors, (8829), 797 states have call successors, (797), 233 states have call predecessors, (797), 287 states have return successors, (1394), 655 states have call predecessors, (1394), 785 states have call successors, (1394) [2021-12-17 02:57:41,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7051 states to 7051 states and 11020 transitions. [2021-12-17 02:57:41,278 INFO L78 Accepts]: Start accepts. Automaton has 7051 states and 11020 transitions. Word has length 53 [2021-12-17 02:57:41,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:41,278 INFO L470 AbstractCegarLoop]: Abstraction has 7051 states and 11020 transitions. [2021-12-17 02:57:41,278 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, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:57:41,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7051 states and 11020 transitions. [2021-12-17 02:57:41,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-17 02:57:41,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:41,280 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:41,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 02:57:41,280 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:41,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:41,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1937199149, now seen corresponding path program 1 times [2021-12-17 02:57:41,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:41,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169029638] [2021-12-17 02:57:41,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:41,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:41,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:57:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:41,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:57:41,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:41,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:41,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:41,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169029638] [2021-12-17 02:57:41,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169029638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:41,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:41,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:57:41,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606484427] [2021-12-17 02:57:41,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:41,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:57:41,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:41,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:57:41,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:57:41,438 INFO L87 Difference]: Start difference. First operand 7051 states and 11020 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:57:45,133 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:45,944 INFO L93 Difference]: Finished difference Result 11721 states and 18614 transitions. [2021-12-17 02:57:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:57:45,945 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 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 52 [2021-12-17 02:57:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:45,966 INFO L225 Difference]: With dead ends: 11721 [2021-12-17 02:57:45,966 INFO L226 Difference]: Without dead ends: 7953 [2021-12-17 02:57:45,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:57:45,987 INFO L933 BasicCegarLoop]: 690 mSDtfsCounter, 1185 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 900 mSolverCounterSat, 352 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1236 SdHoareTripleChecker+Valid, 1864 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 900 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:45,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1236 Valid, 1864 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 900 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-12-17 02:57:45,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7953 states. [2021-12-17 02:57:46,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7953 to 7041. [2021-12-17 02:57:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7041 states, 5957 states have (on average 1.4787644787644787) internal successors, (8809), 6184 states have internal predecessors, (8809), 797 states have call successors, (797), 233 states have call predecessors, (797), 286 states have return successors, (1393), 654 states have call predecessors, (1393), 784 states have call successors, (1393) [2021-12-17 02:57:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7041 states to 7041 states and 10999 transitions. [2021-12-17 02:57:46,301 INFO L78 Accepts]: Start accepts. Automaton has 7041 states and 10999 transitions. Word has length 52 [2021-12-17 02:57:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:46,301 INFO L470 AbstractCegarLoop]: Abstraction has 7041 states and 10999 transitions. [2021-12-17 02:57:46,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 4 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:57:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7041 states and 10999 transitions. [2021-12-17 02:57:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:57:46,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:46,305 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] [2021-12-17 02:57:46,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 02:57:46,305 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:46,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:46,305 INFO L85 PathProgramCache]: Analyzing trace with hash 872726643, now seen corresponding path program 1 times [2021-12-17 02:57:46,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:46,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561762377] [2021-12-17 02:57:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:46,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:46,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:57:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:46,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:57:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:46,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:57:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:46,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 02:57:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:46,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561762377] [2021-12-17 02:57:46,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561762377] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:46,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:46,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:57:46,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041667223] [2021-12-17 02:57:46,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:46,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:57:46,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:57:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:57:46,581 INFO L87 Difference]: Start difference. First operand 7041 states and 10999 transitions. Second operand has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:57:50,582 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:51,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:51,465 INFO L93 Difference]: Finished difference Result 8024 states and 12754 transitions. [2021-12-17 02:57:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:57:51,465 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-12-17 02:57:51,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:51,484 INFO L225 Difference]: With dead ends: 8024 [2021-12-17 02:57:51,485 INFO L226 Difference]: Without dead ends: 8008 [2021-12-17 02:57:51,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:57:51,490 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 932 mSDsluCounter, 2836 mSDsCounter, 0 mSdLazyCounter, 1510 mSolverCounterSat, 479 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 3539 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1510 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:51,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [955 Valid, 3539 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1510 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-12-17 02:57:51,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2021-12-17 02:57:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 7047. [2021-12-17 02:57:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 5960 states have (on average 1.4785234899328858) internal successors, (8812), 6190 states have internal predecessors, (8812), 797 states have call successors, (797), 233 states have call predecessors, (797), 289 states have return successors, (1415), 654 states have call predecessors, (1415), 784 states have call successors, (1415) [2021-12-17 02:57:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 11024 transitions. [2021-12-17 02:57:51,778 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 11024 transitions. Word has length 55 [2021-12-17 02:57:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:51,778 INFO L470 AbstractCegarLoop]: Abstraction has 7047 states and 11024 transitions. [2021-12-17 02:57:51,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:57:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 11024 transitions. [2021-12-17 02:57:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:57:51,780 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:57:51,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:57:51,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 02:57:51,780 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:57:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:57:51,781 INFO L85 PathProgramCache]: Analyzing trace with hash 555700014, now seen corresponding path program 1 times [2021-12-17 02:57:51,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:57:51,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836941162] [2021-12-17 02:57:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:57:51,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:57:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:51,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:57:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:51,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:57:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:57:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:57:51,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:57:51,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836941162] [2021-12-17 02:57:51,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836941162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:57:51,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:57:51,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 02:57:51,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150849716] [2021-12-17 02:57:51,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:57:51,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 02:57:51,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:57:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 02:57:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 02:57:51,904 INFO L87 Difference]: Start difference. First operand 7047 states and 11024 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:57:55,814 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:57,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:57:59,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:57:59,609 INFO L93 Difference]: Finished difference Result 10992 states and 17757 transitions. [2021-12-17 02:57:59,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:57:59,610 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2021-12-17 02:57:59,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:57:59,642 INFO L225 Difference]: With dead ends: 10992 [2021-12-17 02:57:59,642 INFO L226 Difference]: Without dead ends: 10979 [2021-12-17 02:57:59,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:57:59,648 INFO L933 BasicCegarLoop]: 1203 mSDtfsCounter, 966 mSDsluCounter, 1866 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 308 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 3069 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:57:59,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 3069 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 1119 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-12-17 02:57:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2021-12-17 02:57:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 8362. [2021-12-17 02:57:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8362 states, 7112 states have (on average 1.4822834645669292) internal successors, (10542), 7344 states have internal predecessors, (10542), 910 states have call successors, (910), 275 states have call predecessors, (910), 339 states have return successors, (1687), 773 states have call predecessors, (1687), 897 states have call successors, (1687) [2021-12-17 02:57:59,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8362 states to 8362 states and 13139 transitions. [2021-12-17 02:57:59,999 INFO L78 Accepts]: Start accepts. Automaton has 8362 states and 13139 transitions. Word has length 54 [2021-12-17 02:57:59,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:57:59,999 INFO L470 AbstractCegarLoop]: Abstraction has 8362 states and 13139 transitions. [2021-12-17 02:57:59,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:57:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 8362 states and 13139 transitions. [2021-12-17 02:58:00,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-17 02:58:00,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:00,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:00,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 02:58:00,001 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:00,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1129689134, now seen corresponding path program 1 times [2021-12-17 02:58:00,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:00,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486399742] [2021-12-17 02:58:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:00,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:00,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:00,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:00,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:00,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486399742] [2021-12-17 02:58:00,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486399742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:00,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:00,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:58:00,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220392403] [2021-12-17 02:58:00,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:00,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:58:00,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:58:00,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:58:00,143 INFO L87 Difference]: Start difference. First operand 8362 states and 13139 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:58:03,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:04,571 INFO L93 Difference]: Finished difference Result 13163 states and 20813 transitions. [2021-12-17 02:58:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:58:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 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 54 [2021-12-17 02:58:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:04,596 INFO L225 Difference]: With dead ends: 13163 [2021-12-17 02:58:04,596 INFO L226 Difference]: Without dead ends: 8839 [2021-12-17 02:58:04,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:58:04,614 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1171 mSDsluCounter, 1175 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 333 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1222 SdHoareTripleChecker+Valid, 1872 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:04,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1222 Valid, 1872 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 847 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-12-17 02:58:04,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8839 states. [2021-12-17 02:58:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8839 to 6799. [2021-12-17 02:58:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5772 states have (on average 1.48007623007623) internal successors, (8543), 5976 states have internal predecessors, (8543), 751 states have call successors, (751), 230 states have call predecessors, (751), 275 states have return successors, (1161), 623 states have call predecessors, (1161), 738 states have call successors, (1161) [2021-12-17 02:58:04,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 10455 transitions. [2021-12-17 02:58:04,930 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 10455 transitions. Word has length 54 [2021-12-17 02:58:04,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:04,930 INFO L470 AbstractCegarLoop]: Abstraction has 6799 states and 10455 transitions. [2021-12-17 02:58:04,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:58:04,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 10455 transitions. [2021-12-17 02:58:04,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:58:04,932 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:04,932 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] [2021-12-17 02:58:04,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 02:58:04,932 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:04,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:04,932 INFO L85 PathProgramCache]: Analyzing trace with hash 238766756, now seen corresponding path program 1 times [2021-12-17 02:58:04,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:04,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860658288] [2021-12-17 02:58:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:04,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:04,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:05,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:05,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:05,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 02:58:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:05,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:05,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860658288] [2021-12-17 02:58:05,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860658288] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:05,095 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:05,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:58:05,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173314894] [2021-12-17 02:58:05,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:05,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:58:05,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:05,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:58:05,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:58:05,096 INFO L87 Difference]: Start difference. First operand 6799 states and 10455 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:58:08,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:09,705 INFO L93 Difference]: Finished difference Result 7691 states and 11990 transitions. [2021-12-17 02:58:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:58:09,705 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2021-12-17 02:58:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:09,726 INFO L225 Difference]: With dead ends: 7691 [2021-12-17 02:58:09,727 INFO L226 Difference]: Without dead ends: 7673 [2021-12-17 02:58:09,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:58:09,733 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 861 mSDsluCounter, 2256 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 371 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:09,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 2972 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1241 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-17 02:58:09,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7673 states. [2021-12-17 02:58:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7673 to 6796. [2021-12-17 02:58:10,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6796 states, 5770 states have (on average 1.4800693240901213) internal successors, (8540), 5974 states have internal predecessors, (8540), 750 states have call successors, (750), 230 states have call predecessors, (750), 275 states have return successors, (1160), 622 states have call predecessors, (1160), 737 states have call successors, (1160) [2021-12-17 02:58:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6796 states to 6796 states and 10450 transitions. [2021-12-17 02:58:10,099 INFO L78 Accepts]: Start accepts. Automaton has 6796 states and 10450 transitions. Word has length 55 [2021-12-17 02:58:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:10,099 INFO L470 AbstractCegarLoop]: Abstraction has 6796 states and 10450 transitions. [2021-12-17 02:58:10,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 4 states have internal predecessors, (48), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:58:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 6796 states and 10450 transitions. [2021-12-17 02:58:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:58:10,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:10,101 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] [2021-12-17 02:58:10,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 02:58:10,101 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:10,102 INFO L85 PathProgramCache]: Analyzing trace with hash 499005845, now seen corresponding path program 1 times [2021-12-17 02:58:10,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:10,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572251970] [2021-12-17 02:58:10,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:10,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:10,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:10,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:10,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572251970] [2021-12-17 02:58:10,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572251970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:10,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:10,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:58:10,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670517864] [2021-12-17 02:58:10,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:10,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:58:10,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:10,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:58:10,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:58:10,266 INFO L87 Difference]: Start difference. First operand 6796 states and 10450 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:58:13,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:15,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:15,538 INFO L93 Difference]: Finished difference Result 9126 states and 14313 transitions. [2021-12-17 02:58:15,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 02:58:15,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 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 55 [2021-12-17 02:58:15,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:15,555 INFO L225 Difference]: With dead ends: 9126 [2021-12-17 02:58:15,555 INFO L226 Difference]: Without dead ends: 9122 [2021-12-17 02:58:15,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 02:58:15,557 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 1660 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 534 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1717 SdHoareTripleChecker+Valid, 2798 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:15,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1717 Valid, 2798 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 1254 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 02:58:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9122 states. [2021-12-17 02:58:15,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9122 to 6807. [2021-12-17 02:58:15,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 5780 states have (on average 1.479757785467128) internal successors, (8553), 5982 states have internal predecessors, (8553), 750 states have call successors, (750), 230 states have call predecessors, (750), 276 states have return successors, (1164), 625 states have call predecessors, (1164), 737 states have call successors, (1164) [2021-12-17 02:58:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 10467 transitions. [2021-12-17 02:58:15,815 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 10467 transitions. Word has length 55 [2021-12-17 02:58:15,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:15,815 INFO L470 AbstractCegarLoop]: Abstraction has 6807 states and 10467 transitions. [2021-12-17 02:58:15,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 4 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-17 02:58:15,815 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 10467 transitions. [2021-12-17 02:58:15,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-17 02:58:15,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:15,817 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] [2021-12-17 02:58:15,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 02:58:15,817 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:15,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:15,817 INFO L85 PathProgramCache]: Analyzing trace with hash 499282675, now seen corresponding path program 1 times [2021-12-17 02:58:15,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:15,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045825289] [2021-12-17 02:58:15,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:15,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:15,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:15,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:15,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:15,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045825289] [2021-12-17 02:58:15,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045825289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:15,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:15,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:58:15,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690567859] [2021-12-17 02:58:15,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:15,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:58:15,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:58:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:58:15,954 INFO L87 Difference]: Start difference. First operand 6807 states and 10467 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:58:20,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:21,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:21,259 INFO L93 Difference]: Finished difference Result 7650 states and 11920 transitions. [2021-12-17 02:58:21,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 02:58:21,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2021-12-17 02:58:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:21,277 INFO L225 Difference]: With dead ends: 7650 [2021-12-17 02:58:21,278 INFO L226 Difference]: Without dead ends: 7607 [2021-12-17 02:58:21,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:58:21,282 INFO L933 BasicCegarLoop]: 708 mSDtfsCounter, 410 mSDsluCounter, 3187 mSDsCounter, 0 mSdLazyCounter, 1208 mSolverCounterSat, 192 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 3895 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1208 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:21,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 3895 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1208 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-12-17 02:58:21,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7607 states. [2021-12-17 02:58:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7607 to 6777. [2021-12-17 02:58:21,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6777 states, 5751 states have (on average 1.480264301860546) internal successors, (8513), 5953 states have internal predecessors, (8513), 749 states have call successors, (749), 230 states have call predecessors, (749), 276 states have return successors, (1162), 624 states have call predecessors, (1162), 736 states have call successors, (1162) [2021-12-17 02:58:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6777 states to 6777 states and 10424 transitions. [2021-12-17 02:58:21,583 INFO L78 Accepts]: Start accepts. Automaton has 6777 states and 10424 transitions. Word has length 55 [2021-12-17 02:58:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:21,583 INFO L470 AbstractCegarLoop]: Abstraction has 6777 states and 10424 transitions. [2021-12-17 02:58:21,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-17 02:58:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6777 states and 10424 transitions. [2021-12-17 02:58:21,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 02:58:21,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:21,585 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:21,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 02:58:21,585 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:21,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:21,586 INFO L85 PathProgramCache]: Analyzing trace with hash 948026652, now seen corresponding path program 1 times [2021-12-17 02:58:21,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:21,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818616528] [2021-12-17 02:58:21,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:21,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:21,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:21,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:21,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:21,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:58:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:21,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:58:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:21,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:21,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:21,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818616528] [2021-12-17 02:58:21,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818616528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:21,932 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:21,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:58:21,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820135531] [2021-12-17 02:58:21,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:21,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:58:21,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:58:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:58:21,935 INFO L87 Difference]: Start difference. First operand 6777 states and 10424 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:58:26,311 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:27,245 INFO L93 Difference]: Finished difference Result 13421 states and 21123 transitions. [2021-12-17 02:58:27,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 02:58:27,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2021-12-17 02:58:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:27,266 INFO L225 Difference]: With dead ends: 13421 [2021-12-17 02:58:27,266 INFO L226 Difference]: Without dead ends: 7857 [2021-12-17 02:58:27,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-17 02:58:27,281 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 381 mSDsluCounter, 2614 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 229 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 3264 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:27,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 3264 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1505 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-12-17 02:58:27,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7857 states. [2021-12-17 02:58:27,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7857 to 6853. [2021-12-17 02:58:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5807 states have (on average 1.4756328568968486) internal successors, (8569), 6017 states have internal predecessors, (8569), 749 states have call successors, (749), 230 states have call predecessors, (749), 296 states have return successors, (1233), 636 states have call predecessors, (1233), 736 states have call successors, (1233) [2021-12-17 02:58:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 10551 transitions. [2021-12-17 02:58:27,577 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 10551 transitions. Word has length 60 [2021-12-17 02:58:27,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:27,577 INFO L470 AbstractCegarLoop]: Abstraction has 6853 states and 10551 transitions. [2021-12-17 02:58:27,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:58:27,577 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 10551 transitions. [2021-12-17 02:58:27,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-17 02:58:27,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:27,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:27,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 02:58:27,579 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:27,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:27,579 INFO L85 PathProgramCache]: Analyzing trace with hash -749476623, now seen corresponding path program 1 times [2021-12-17 02:58:27,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:27,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809338793] [2021-12-17 02:58:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:27,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:27,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:27,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:27,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:58:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:27,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-17 02:58:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:27,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:27,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809338793] [2021-12-17 02:58:27,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809338793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:27,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:27,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 02:58:27,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807512610] [2021-12-17 02:58:27,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:27,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 02:58:27,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 02:58:27,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 02:58:27,856 INFO L87 Difference]: Start difference. First operand 6853 states and 10551 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:58:32,991 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:34,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:34,298 INFO L93 Difference]: Finished difference Result 7755 states and 12177 transitions. [2021-12-17 02:58:34,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 02:58:34,298 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2021-12-17 02:58:34,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:34,315 INFO L225 Difference]: With dead ends: 7755 [2021-12-17 02:58:34,315 INFO L226 Difference]: Without dead ends: 7741 [2021-12-17 02:58:34,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-17 02:58:34,318 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 908 mSDsluCounter, 3597 mSDsCounter, 0 mSdLazyCounter, 2781 mSolverCounterSat, 473 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 932 SdHoareTripleChecker+Valid, 4247 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2781 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:34,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [932 Valid, 4247 Invalid, 3255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2781 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-12-17 02:58:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7741 states. [2021-12-17 02:58:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7741 to 6855. [2021-12-17 02:58:34,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6855 states, 5808 states have (on average 1.475550964187328) internal successors, (8570), 6019 states have internal predecessors, (8570), 749 states have call successors, (749), 230 states have call predecessors, (749), 297 states have return successors, (1248), 636 states have call predecessors, (1248), 736 states have call successors, (1248) [2021-12-17 02:58:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6855 states to 6855 states and 10567 transitions. [2021-12-17 02:58:34,599 INFO L78 Accepts]: Start accepts. Automaton has 6855 states and 10567 transitions. Word has length 62 [2021-12-17 02:58:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:34,599 INFO L470 AbstractCegarLoop]: Abstraction has 6855 states and 10567 transitions. [2021-12-17 02:58:34,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 6 states have internal predecessors, (53), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:58:34,600 INFO L276 IsEmpty]: Start isEmpty. Operand 6855 states and 10567 transitions. [2021-12-17 02:58:34,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 02:58:34,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:34,601 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:34,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 02:58:34,602 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:34,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1416668636, now seen corresponding path program 1 times [2021-12-17 02:58:34,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:34,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682949665] [2021-12-17 02:58:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:34,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:34,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:34,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:34,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:58:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:34,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 02:58:34,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:34,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:34,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:58:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:34,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:34,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682949665] [2021-12-17 02:58:34,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682949665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:34,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:34,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:58:34,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052578347] [2021-12-17 02:58:34,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:34,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:58:34,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:34,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:58:34,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:58:34,952 INFO L87 Difference]: Start difference. First operand 6855 states and 10567 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 02:58:39,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:41,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:43,942 INFO L93 Difference]: Finished difference Result 10875 states and 17003 transitions. [2021-12-17 02:58:43,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 02:58:43,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 65 [2021-12-17 02:58:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:43,962 INFO L225 Difference]: With dead ends: 10875 [2021-12-17 02:58:43,962 INFO L226 Difference]: Without dead ends: 7624 [2021-12-17 02:58:43,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:58:43,973 INFO L933 BasicCegarLoop]: 1119 mSDtfsCounter, 914 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 1691 mSolverCounterSat, 401 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 957 SdHoareTripleChecker+Valid, 3039 SdHoareTripleChecker+Invalid, 2094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1691 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:43,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [957 Valid, 3039 Invalid, 2094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1691 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2021-12-17 02:58:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7624 states. [2021-12-17 02:58:44,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7624 to 6723. [2021-12-17 02:58:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6723 states, 5693 states have (on average 1.476725803618479) internal successors, (8407), 5908 states have internal predecessors, (8407), 738 states have call successors, (738), 227 states have call predecessors, (738), 291 states have return successors, (1189), 617 states have call predecessors, (1189), 717 states have call successors, (1189) [2021-12-17 02:58:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6723 states to 6723 states and 10334 transitions. [2021-12-17 02:58:44,267 INFO L78 Accepts]: Start accepts. Automaton has 6723 states and 10334 transitions. Word has length 65 [2021-12-17 02:58:44,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:44,267 INFO L470 AbstractCegarLoop]: Abstraction has 6723 states and 10334 transitions. [2021-12-17 02:58:44,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 02:58:44,267 INFO L276 IsEmpty]: Start isEmpty. Operand 6723 states and 10334 transitions. [2021-12-17 02:58:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 02:58:44,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:44,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:44,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 02:58:44,269 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:44,269 INFO L85 PathProgramCache]: Analyzing trace with hash -340114262, now seen corresponding path program 1 times [2021-12-17 02:58:44,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:44,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284944775] [2021-12-17 02:58:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:44,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:44,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:44,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:44,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:58:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:44,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:44,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 02:58:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:44,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:44,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:44,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284944775] [2021-12-17 02:58:44,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284944775] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:44,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:44,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 02:58:44,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219496409] [2021-12-17 02:58:44,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:44,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 02:58:44,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:44,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 02:58:44,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 02:58:44,465 INFO L87 Difference]: Start difference. First operand 6723 states and 10334 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 02:58:49,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:49,922 INFO L93 Difference]: Finished difference Result 13105 states and 20530 transitions. [2021-12-17 02:58:49,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 02:58:49,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 66 [2021-12-17 02:58:49,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:49,943 INFO L225 Difference]: With dead ends: 13105 [2021-12-17 02:58:49,943 INFO L226 Difference]: Without dead ends: 7568 [2021-12-17 02:58:49,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:58:49,960 INFO L933 BasicCegarLoop]: 663 mSDtfsCounter, 439 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 294 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1887 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:49,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 1887 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 749 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-12-17 02:58:49,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7568 states. [2021-12-17 02:58:50,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7568 to 6629. [2021-12-17 02:58:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6629 states, 5601 states have (on average 1.4767005891805034) internal successors, (8271), 5826 states have internal predecessors, (8271), 744 states have call successors, (744), 227 states have call predecessors, (744), 283 states have return successors, (1184), 605 states have call predecessors, (1184), 723 states have call successors, (1184) [2021-12-17 02:58:50,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6629 states to 6629 states and 10199 transitions. [2021-12-17 02:58:50,308 INFO L78 Accepts]: Start accepts. Automaton has 6629 states and 10199 transitions. Word has length 66 [2021-12-17 02:58:50,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:50,308 INFO L470 AbstractCegarLoop]: Abstraction has 6629 states and 10199 transitions. [2021-12-17 02:58:50,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 3 states have internal predecessors, (55), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 02:58:50,308 INFO L276 IsEmpty]: Start isEmpty. Operand 6629 states and 10199 transitions. [2021-12-17 02:58:50,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 02:58:50,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:50,310 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:58:50,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 02:58:50,310 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:50,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:50,311 INFO L85 PathProgramCache]: Analyzing trace with hash 437037204, now seen corresponding path program 1 times [2021-12-17 02:58:50,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:50,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223631273] [2021-12-17 02:58:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:50,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:50,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:50,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:50,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 02:58:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:50,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:50,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:50,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223631273] [2021-12-17 02:58:50,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223631273] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:50,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:50,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:58:50,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933162635] [2021-12-17 02:58:50,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:50,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:58:50,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:50,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:58:50,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:58:50,500 INFO L87 Difference]: Start difference. First operand 6629 states and 10199 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:58:55,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:58:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:58:56,347 INFO L93 Difference]: Finished difference Result 7477 states and 11670 transitions. [2021-12-17 02:58:56,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 02:58:56,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 65 [2021-12-17 02:58:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:58:56,362 INFO L225 Difference]: With dead ends: 7477 [2021-12-17 02:58:56,362 INFO L226 Difference]: Without dead ends: 7459 [2021-12-17 02:58:56,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:58:56,365 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 861 mSDsluCounter, 3212 mSDsCounter, 0 mSdLazyCounter, 2411 mSolverCounterSat, 372 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 3870 SdHoareTripleChecker+Invalid, 2784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 2411 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 02:58:56,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 3870 Invalid, 2784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 2411 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 02:58:56,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7459 states. [2021-12-17 02:58:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7459 to 6625. [2021-12-17 02:58:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5598 states have (on average 1.476777420507324) internal successors, (8267), 5823 states have internal predecessors, (8267), 743 states have call successors, (743), 227 states have call predecessors, (743), 283 states have return successors, (1183), 604 states have call predecessors, (1183), 722 states have call successors, (1183) [2021-12-17 02:58:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 10193 transitions. [2021-12-17 02:58:56,656 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 10193 transitions. Word has length 65 [2021-12-17 02:58:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:58:56,656 INFO L470 AbstractCegarLoop]: Abstraction has 6625 states and 10193 transitions. [2021-12-17 02:58:56,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 02:58:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 10193 transitions. [2021-12-17 02:58:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-17 02:58:56,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:58:56,658 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] [2021-12-17 02:58:56,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 02:58:56,658 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:58:56,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:58:56,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1869722635, now seen corresponding path program 1 times [2021-12-17 02:58:56,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:58:56,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601976977] [2021-12-17 02:58:56,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:58:56,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:58:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:56,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:58:56,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:56,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:58:56,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:56,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:58:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:56,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-17 02:58:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:58:56,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:58:56,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:58:56,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601976977] [2021-12-17 02:58:56,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601976977] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:58:56,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:58:56,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:58:56,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325365161] [2021-12-17 02:58:56,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:58:56,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:58:56,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:58:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:58:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:58:56,837 INFO L87 Difference]: Start difference. First operand 6625 states and 10193 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:00,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:01,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:01,774 INFO L93 Difference]: Finished difference Result 10441 states and 16350 transitions. [2021-12-17 02:59:01,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:59:01,775 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 67 [2021-12-17 02:59:01,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:01,796 INFO L225 Difference]: With dead ends: 10441 [2021-12-17 02:59:01,796 INFO L226 Difference]: Without dead ends: 7793 [2021-12-17 02:59:01,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:59:01,807 INFO L933 BasicCegarLoop]: 647 mSDtfsCounter, 909 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 406 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 931 SdHoareTripleChecker+Valid, 2063 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:01,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [931 Valid, 2063 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 1067 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2021-12-17 02:59:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7793 states. [2021-12-17 02:59:02,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7793 to 6847. [2021-12-17 02:59:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6847 states, 5810 states have (on average 1.4731497418244406) internal successors, (8559), 6043 states have internal predecessors, (8559), 743 states have call successors, (743), 227 states have call predecessors, (743), 293 states have return successors, (1198), 606 states have call predecessors, (1198), 722 states have call successors, (1198) [2021-12-17 02:59:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6847 states to 6847 states and 10500 transitions. [2021-12-17 02:59:02,157 INFO L78 Accepts]: Start accepts. Automaton has 6847 states and 10500 transitions. Word has length 67 [2021-12-17 02:59:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:02,157 INFO L470 AbstractCegarLoop]: Abstraction has 6847 states and 10500 transitions. [2021-12-17 02:59:02,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 6847 states and 10500 transitions. [2021-12-17 02:59:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 02:59:02,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:02,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:02,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 02:59:02,159 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:02,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:02,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1466440038, now seen corresponding path program 1 times [2021-12-17 02:59:02,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:02,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034854878] [2021-12-17 02:59:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:02,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:02,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:02,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:02,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 02:59:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:02,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 02:59:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:02,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 02:59:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:02,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:02,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034854878] [2021-12-17 02:59:02,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034854878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:02,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:02,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:59:02,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707047259] [2021-12-17 02:59:02,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:02,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:59:02,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:02,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:59:02,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:59:02,324 INFO L87 Difference]: Start difference. First operand 6847 states and 10500 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:59:06,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:08,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:08,660 INFO L93 Difference]: Finished difference Result 9490 states and 14566 transitions. [2021-12-17 02:59:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 02:59:08,661 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-17 02:59:08,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:08,670 INFO L225 Difference]: With dead ends: 9490 [2021-12-17 02:59:08,670 INFO L226 Difference]: Without dead ends: 5437 [2021-12-17 02:59:08,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-12-17 02:59:08,678 INFO L933 BasicCegarLoop]: 990 mSDtfsCounter, 2801 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 1890 mSolverCounterSat, 903 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2861 SdHoareTripleChecker+Valid, 2978 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 1890 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:08,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2861 Valid, 2978 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 1890 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-12-17 02:59:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5437 states. [2021-12-17 02:59:08,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5437 to 4456. [2021-12-17 02:59:08,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4456 states, 3785 states have (on average 1.4544253632760897) internal successors, (5505), 3908 states have internal predecessors, (5505), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2021-12-17 02:59:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4456 states to 4456 states and 6623 transitions. [2021-12-17 02:59:08,880 INFO L78 Accepts]: Start accepts. Automaton has 4456 states and 6623 transitions. Word has length 69 [2021-12-17 02:59:08,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:08,880 INFO L470 AbstractCegarLoop]: Abstraction has 4456 states and 6623 transitions. [2021-12-17 02:59:08,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 4 states have internal predecessors, (57), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:59:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4456 states and 6623 transitions. [2021-12-17 02:59:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 02:59:08,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:08,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:08,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 02:59:08,882 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:08,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:08,882 INFO L85 PathProgramCache]: Analyzing trace with hash -677342089, now seen corresponding path program 1 times [2021-12-17 02:59:08,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:08,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477268357] [2021-12-17 02:59:08,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:08,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:08,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:08,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:09,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:59:09,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:09,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 02:59:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:09,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:09,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477268357] [2021-12-17 02:59:09,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477268357] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:09,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:09,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:59:09,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735467756] [2021-12-17 02:59:09,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:09,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:59:09,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:09,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:59:09,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:59:09,064 INFO L87 Difference]: Start difference. First operand 4456 states and 6623 transitions. Second operand has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:13,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:15,482 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:16,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:16,540 INFO L93 Difference]: Finished difference Result 7882 states and 11879 transitions. [2021-12-17 02:59:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:59:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2021-12-17 02:59:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:16,552 INFO L225 Difference]: With dead ends: 7882 [2021-12-17 02:59:16,552 INFO L226 Difference]: Without dead ends: 5395 [2021-12-17 02:59:16,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:59:16,559 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 793 mSDsluCounter, 1700 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 187 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 2356 SdHoareTripleChecker+Invalid, 1660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:16,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [816 Valid, 2356 Invalid, 1660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1471 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2021-12-17 02:59:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5395 states. [2021-12-17 02:59:16,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5395 to 4432. [2021-12-17 02:59:16,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4432 states, 3761 states have (on average 1.4557298590800318) internal successors, (5475), 3884 states have internal predecessors, (5475), 466 states have call successors, (466), 162 states have call predecessors, (466), 204 states have return successors, (652), 401 states have call predecessors, (652), 449 states have call successors, (652) [2021-12-17 02:59:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4432 states to 4432 states and 6593 transitions. [2021-12-17 02:59:16,786 INFO L78 Accepts]: Start accepts. Automaton has 4432 states and 6593 transitions. Word has length 68 [2021-12-17 02:59:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:16,787 INFO L470 AbstractCegarLoop]: Abstraction has 4432 states and 6593 transitions. [2021-12-17 02:59:16,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.428571428571429) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:16,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4432 states and 6593 transitions. [2021-12-17 02:59:16,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 02:59:16,792 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:16,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:16,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-17 02:59:16,793 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:16,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash -554272668, now seen corresponding path program 1 times [2021-12-17 02:59:16,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:16,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300150685] [2021-12-17 02:59:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:16,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:16,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:16,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:16,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:16,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 02:59:16,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:16,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 02:59:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:16,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-17 02:59:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:16,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 02:59:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:16,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:16,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300150685] [2021-12-17 02:59:16,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300150685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:16,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:16,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 02:59:16,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91000242] [2021-12-17 02:59:16,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:16,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 02:59:16,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 02:59:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 02:59:16,993 INFO L87 Difference]: Start difference. First operand 4432 states and 6593 transitions. Second operand has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 02:59:21,145 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:22,211 INFO L93 Difference]: Finished difference Result 7928 states and 11993 transitions. [2021-12-17 02:59:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 02:59:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 71 [2021-12-17 02:59:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:22,227 INFO L225 Difference]: With dead ends: 7928 [2021-12-17 02:59:22,228 INFO L226 Difference]: Without dead ends: 5377 [2021-12-17 02:59:22,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-12-17 02:59:22,236 INFO L933 BasicCegarLoop]: 639 mSDtfsCounter, 1397 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 611 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 2273 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:22,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1407 Valid, 2273 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 1213 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 02:59:22,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5377 states. [2021-12-17 02:59:22,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5377 to 4423. [2021-12-17 02:59:22,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 3755 states have (on average 1.4561917443408787) internal successors, (5468), 3877 states have internal predecessors, (5468), 464 states have call successors, (464), 161 states have call predecessors, (464), 203 states have return successors, (638), 399 states have call predecessors, (638), 447 states have call successors, (638) [2021-12-17 02:59:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 6570 transitions. [2021-12-17 02:59:22,491 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 6570 transitions. Word has length 71 [2021-12-17 02:59:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:22,491 INFO L470 AbstractCegarLoop]: Abstraction has 4423 states and 6570 transitions. [2021-12-17 02:59:22,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.142857142857142) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 02:59:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 6570 transitions. [2021-12-17 02:59:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 02:59:22,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:22,493 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] [2021-12-17 02:59:22,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-17 02:59:22,493 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:22,493 INFO L85 PathProgramCache]: Analyzing trace with hash 827121083, now seen corresponding path program 1 times [2021-12-17 02:59:22,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:22,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30677674] [2021-12-17 02:59:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:22,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:22,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:22,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:22,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 02:59:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:22,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 02:59:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:22,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:22,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30677674] [2021-12-17 02:59:22,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30677674] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:22,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:22,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:59:22,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209529375] [2021-12-17 02:59:22,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:22,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:59:22,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:59:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:59:22,742 INFO L87 Difference]: Start difference. First operand 4423 states and 6570 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:27,031 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:27,978 INFO L93 Difference]: Finished difference Result 5314 states and 8061 transitions. [2021-12-17 02:59:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 02:59:27,978 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 68 [2021-12-17 02:59:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:27,992 INFO L225 Difference]: With dead ends: 5314 [2021-12-17 02:59:27,992 INFO L226 Difference]: Without dead ends: 5292 [2021-12-17 02:59:27,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-12-17 02:59:27,996 INFO L933 BasicCegarLoop]: 661 mSDtfsCounter, 1072 mSDsluCounter, 2414 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 478 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1128 SdHoareTripleChecker+Valid, 3075 SdHoareTripleChecker+Invalid, 1959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:27,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1128 Valid, 3075 Invalid, 1959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 1480 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 02:59:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5292 states. [2021-12-17 02:59:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5292 to 4430. [2021-12-17 02:59:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 3759 states have (on average 1.4554402766693268) internal successors, (5471), 3882 states have internal predecessors, (5471), 467 states have call successors, (467), 161 states have call predecessors, (467), 203 states have return successors, (647), 401 states have call predecessors, (647), 448 states have call successors, (647) [2021-12-17 02:59:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6585 transitions. [2021-12-17 02:59:28,245 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6585 transitions. Word has length 68 [2021-12-17 02:59:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:28,246 INFO L470 AbstractCegarLoop]: Abstraction has 4430 states and 6585 transitions. [2021-12-17 02:59:28,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 3 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6585 transitions. [2021-12-17 02:59:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 02:59:28,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:28,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:28,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-17 02:59:28,248 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:28,248 INFO L85 PathProgramCache]: Analyzing trace with hash 463590116, now seen corresponding path program 1 times [2021-12-17 02:59:28,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:28,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426746303] [2021-12-17 02:59:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:28,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:28,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:28,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:59:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:28,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 02:59:28,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:28,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:28,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426746303] [2021-12-17 02:59:28,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426746303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:28,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:28,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:59:28,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837948146] [2021-12-17 02:59:28,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:28,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:59:28,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:59:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:59:28,514 INFO L87 Difference]: Start difference. First operand 4430 states and 6585 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:33,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:34,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:34,821 INFO L93 Difference]: Finished difference Result 5370 states and 8183 transitions. [2021-12-17 02:59:34,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 02:59:34,822 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 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 69 [2021-12-17 02:59:34,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:34,833 INFO L225 Difference]: With dead ends: 5370 [2021-12-17 02:59:34,833 INFO L226 Difference]: Without dead ends: 5354 [2021-12-17 02:59:34,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:59:34,835 INFO L933 BasicCegarLoop]: 650 mSDtfsCounter, 848 mSDsluCounter, 3108 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 294 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 3758 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:34,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 3758 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 1912 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2021-12-17 02:59:34,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5354 states. [2021-12-17 02:59:35,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5354 to 4435. [2021-12-17 02:59:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4435 states, 3762 states have (on average 1.4556087187666136) internal successors, (5476), 3886 states have internal predecessors, (5476), 469 states have call successors, (469), 161 states have call predecessors, (469), 203 states have return successors, (649), 402 states have call predecessors, (649), 450 states have call successors, (649) [2021-12-17 02:59:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4435 states to 4435 states and 6594 transitions. [2021-12-17 02:59:35,056 INFO L78 Accepts]: Start accepts. Automaton has 4435 states and 6594 transitions. Word has length 69 [2021-12-17 02:59:35,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:35,057 INFO L470 AbstractCegarLoop]: Abstraction has 4435 states and 6594 transitions. [2021-12-17 02:59:35,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 3 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 02:59:35,057 INFO L276 IsEmpty]: Start isEmpty. Operand 4435 states and 6594 transitions. [2021-12-17 02:59:35,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 02:59:35,058 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:35,058 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:35,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-12-17 02:59:35,058 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:35,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:35,058 INFO L85 PathProgramCache]: Analyzing trace with hash -669900528, now seen corresponding path program 1 times [2021-12-17 02:59:35,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:35,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601081640] [2021-12-17 02:59:35,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:35,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:35,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:35,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:35,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:59:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:35,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:59:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:35,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:35,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601081640] [2021-12-17 02:59:35,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601081640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:35,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:35,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 02:59:35,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889946267] [2021-12-17 02:59:35,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:35,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 02:59:35,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:35,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 02:59:35,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-17 02:59:35,297 INFO L87 Difference]: Start difference. First operand 4435 states and 6594 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:59:39,834 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:41,877 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:42,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:42,866 INFO L93 Difference]: Finished difference Result 9537 states and 14519 transitions. [2021-12-17 02:59:42,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 02:59:42,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2021-12-17 02:59:42,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:42,881 INFO L225 Difference]: With dead ends: 9537 [2021-12-17 02:59:42,881 INFO L226 Difference]: Without dead ends: 5481 [2021-12-17 02:59:42,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:59:42,891 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 382 mSDsluCounter, 2084 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 119 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:42,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 2743 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1241 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2021-12-17 02:59:42,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-12-17 02:59:43,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 4463. [2021-12-17 02:59:43,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3790 states have (on average 1.4522427440633245) internal successors, (5504), 3914 states have internal predecessors, (5504), 469 states have call successors, (469), 161 states have call predecessors, (469), 203 states have return successors, (649), 402 states have call predecessors, (649), 450 states have call successors, (649) [2021-12-17 02:59:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 6622 transitions. [2021-12-17 02:59:43,119 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 6622 transitions. Word has length 69 [2021-12-17 02:59:43,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:43,120 INFO L470 AbstractCegarLoop]: Abstraction has 4463 states and 6622 transitions. [2021-12-17 02:59:43,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:59:43,120 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 6622 transitions. [2021-12-17 02:59:43,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 02:59:43,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:43,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:43,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-17 02:59:43,121 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:43,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:43,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1685614928, now seen corresponding path program 1 times [2021-12-17 02:59:43,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:43,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800904825] [2021-12-17 02:59:43,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:43,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:43,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:43,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:43,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:43,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:43,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:59:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:43,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:59:43,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:43,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:43,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800904825] [2021-12-17 02:59:43,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800904825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:43,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:43,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:59:43,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043072441] [2021-12-17 02:59:43,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:43,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:59:43,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:43,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:59:43,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:59:43,427 INFO L87 Difference]: Start difference. First operand 4463 states and 6622 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:59:47,803 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:48,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:48,660 INFO L93 Difference]: Finished difference Result 9457 states and 14325 transitions. [2021-12-17 02:59:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 02:59:48,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 69 [2021-12-17 02:59:48,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:48,674 INFO L225 Difference]: With dead ends: 9457 [2021-12-17 02:59:48,674 INFO L226 Difference]: Without dead ends: 5392 [2021-12-17 02:59:48,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-12-17 02:59:48,683 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 459 mSDsluCounter, 2890 mSDsCounter, 0 mSdLazyCounter, 1397 mSolverCounterSat, 312 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 3531 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 1397 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:48,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 3531 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 1397 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 02:59:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5392 states. [2021-12-17 02:59:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5392 to 4442. [2021-12-17 02:59:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4442 states, 3776 states have (on average 1.4539194915254237) internal successors, (5490), 3900 states have internal predecessors, (5490), 469 states have call successors, (469), 161 states have call predecessors, (469), 196 states have return successors, (604), 395 states have call predecessors, (604), 450 states have call successors, (604) [2021-12-17 02:59:48,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4442 states to 4442 states and 6563 transitions. [2021-12-17 02:59:48,951 INFO L78 Accepts]: Start accepts. Automaton has 4442 states and 6563 transitions. Word has length 69 [2021-12-17 02:59:48,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:48,952 INFO L470 AbstractCegarLoop]: Abstraction has 4442 states and 6563 transitions. [2021-12-17 02:59:48,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 02:59:48,952 INFO L276 IsEmpty]: Start isEmpty. Operand 4442 states and 6563 transitions. [2021-12-17 02:59:48,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 02:59:48,953 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:48,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 02:59:48,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-12-17 02:59:48,954 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:48,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:48,954 INFO L85 PathProgramCache]: Analyzing trace with hash 277949588, now seen corresponding path program 1 times [2021-12-17 02:59:48,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:48,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041086430] [2021-12-17 02:59:48,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:48,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:49,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:49,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:59:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:49,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 02:59:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:49,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:59:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:49,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:49,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041086430] [2021-12-17 02:59:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041086430] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:49,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:49,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 02:59:49,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774845133] [2021-12-17 02:59:49,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:49,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 02:59:49,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:49,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 02:59:49,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-17 02:59:49,205 INFO L87 Difference]: Start difference. First operand 4442 states and 6563 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:59:54,535 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:56,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 02:59:58,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 02:59:58,084 INFO L93 Difference]: Finished difference Result 7980 states and 12030 transitions. [2021-12-17 02:59:58,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 02:59:58,088 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2021-12-17 02:59:58,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 02:59:58,101 INFO L225 Difference]: With dead ends: 7980 [2021-12-17 02:59:58,101 INFO L226 Difference]: Without dead ends: 5496 [2021-12-17 02:59:58,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-12-17 02:59:58,107 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 737 mSDsluCounter, 3042 mSDsCounter, 0 mSdLazyCounter, 2351 mSolverCounterSat, 183 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 3694 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 2351 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-12-17 02:59:58,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 3694 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 2351 Invalid, 2 Unknown, 0 Unchecked, 8.4s Time] [2021-12-17 02:59:58,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-12-17 02:59:58,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4500. [2021-12-17 02:59:58,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4500 states, 3820 states have (on average 1.4486910994764397) internal successors, (5534), 3946 states have internal predecessors, (5534), 469 states have call successors, (469), 161 states have call predecessors, (469), 210 states have return successors, (649), 407 states have call predecessors, (649), 450 states have call successors, (649) [2021-12-17 02:59:58,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4500 states to 4500 states and 6652 transitions. [2021-12-17 02:59:58,338 INFO L78 Accepts]: Start accepts. Automaton has 4500 states and 6652 transitions. Word has length 71 [2021-12-17 02:59:58,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 02:59:58,338 INFO L470 AbstractCegarLoop]: Abstraction has 4500 states and 6652 transitions. [2021-12-17 02:59:58,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 02:59:58,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4500 states and 6652 transitions. [2021-12-17 02:59:58,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 02:59:58,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 02:59:58,340 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, 1, 1, 1, 1] [2021-12-17 02:59:58,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-12-17 02:59:58,340 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 02:59:58,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 02:59:58,341 INFO L85 PathProgramCache]: Analyzing trace with hash 302497870, now seen corresponding path program 1 times [2021-12-17 02:59:58,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 02:59:58,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319587095] [2021-12-17 02:59:58,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 02:59:58,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 02:59:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 02:59:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 02:59:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 02:59:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 02:59:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 02:59:58,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 02:59:58,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 02:59:58,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319587095] [2021-12-17 02:59:58,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319587095] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 02:59:58,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 02:59:58,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 02:59:58,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463179057] [2021-12-17 02:59:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 02:59:58,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 02:59:58,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 02:59:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 02:59:58,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-12-17 02:59:58,576 INFO L87 Difference]: Start difference. First operand 4500 states and 6652 transitions. Second operand has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 03:00:02,685 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:03,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:03,541 INFO L93 Difference]: Finished difference Result 9776 states and 14787 transitions. [2021-12-17 03:00:03,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:00:03,542 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2021-12-17 03:00:03,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:03,557 INFO L225 Difference]: With dead ends: 9776 [2021-12-17 03:00:03,557 INFO L226 Difference]: Without dead ends: 5674 [2021-12-17 03:00:03,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:00:03,566 INFO L933 BasicCegarLoop]: 634 mSDtfsCounter, 455 mSDsluCounter, 2348 mSDsCounter, 0 mSdLazyCounter, 1206 mSolverCounterSat, 317 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 2982 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1206 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:03,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 2982 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1206 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-12-17 03:00:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5674 states. [2021-12-17 03:00:03,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5674 to 4512. [2021-12-17 03:00:03,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4512 states, 3832 states have (on average 1.447286012526096) internal successors, (5546), 3946 states have internal predecessors, (5546), 469 states have call successors, (469), 161 states have call predecessors, (469), 210 states have return successors, (649), 419 states have call predecessors, (649), 450 states have call successors, (649) [2021-12-17 03:00:03,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4512 states to 4512 states and 6664 transitions. [2021-12-17 03:00:03,809 INFO L78 Accepts]: Start accepts. Automaton has 4512 states and 6664 transitions. Word has length 70 [2021-12-17 03:00:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:03,810 INFO L470 AbstractCegarLoop]: Abstraction has 4512 states and 6664 transitions. [2021-12-17 03:00:03,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.777777777777778) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 03:00:03,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4512 states and 6664 transitions. [2021-12-17 03:00:03,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 03:00:03,811 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:03,811 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:03,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-12-17 03:00:03,811 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:03,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:03,812 INFO L85 PathProgramCache]: Analyzing trace with hash 965591191, now seen corresponding path program 1 times [2021-12-17 03:00:03,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:03,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799283075] [2021-12-17 03:00:03,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:03,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:03,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:04,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:04,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:04,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 03:00:04,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:04,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:04,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799283075] [2021-12-17 03:00:04,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799283075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:04,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:04,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:00:04,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130225541] [2021-12-17 03:00:04,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:04,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:00:04,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:04,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:00:04,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:00:04,064 INFO L87 Difference]: Start difference. First operand 4512 states and 6664 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:00:08,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:09,972 INFO L93 Difference]: Finished difference Result 5386 states and 8121 transitions. [2021-12-17 03:00:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:00:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2021-12-17 03:00:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:09,985 INFO L225 Difference]: With dead ends: 5386 [2021-12-17 03:00:09,985 INFO L226 Difference]: Without dead ends: 5364 [2021-12-17 03:00:09,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:00:09,987 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 871 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 2730 mSolverCounterSat, 359 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 4294 SdHoareTripleChecker+Invalid, 3090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 2730 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:09,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 4294 Invalid, 3090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 2730 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2021-12-17 03:00:09,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-12-17 03:00:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 4507. [2021-12-17 03:00:10,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4507 states, 3828 states have (on average 1.4474921630094044) internal successors, (5541), 3942 states have internal predecessors, (5541), 468 states have call successors, (468), 161 states have call predecessors, (468), 210 states have return successors, (648), 418 states have call predecessors, (648), 449 states have call successors, (648) [2021-12-17 03:00:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4507 states to 4507 states and 6657 transitions. [2021-12-17 03:00:10,249 INFO L78 Accepts]: Start accepts. Automaton has 4507 states and 6657 transitions. Word has length 69 [2021-12-17 03:00:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:10,249 INFO L470 AbstractCegarLoop]: Abstraction has 4507 states and 6657 transitions. [2021-12-17 03:00:10,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:00:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4507 states and 6657 transitions. [2021-12-17 03:00:10,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 03:00:10,250 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:10,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:10,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-12-17 03:00:10,250 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:10,251 INFO L85 PathProgramCache]: Analyzing trace with hash 2005419428, now seen corresponding path program 1 times [2021-12-17 03:00:10,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:10,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452843146] [2021-12-17 03:00:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:10,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:10,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:10,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:10,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:10,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:00:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:10,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:00:10,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:10,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 03:00:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:10,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:10,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:10,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452843146] [2021-12-17 03:00:10,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452843146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:10,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:10,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:00:10,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580996770] [2021-12-17 03:00:10,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:10,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:00:10,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:10,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:00:10,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:00:10,428 INFO L87 Difference]: Start difference. First operand 4507 states and 6657 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:00:14,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:15,209 INFO L93 Difference]: Finished difference Result 9677 states and 14510 transitions. [2021-12-17 03:00:15,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:00:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2021-12-17 03:00:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:15,221 INFO L225 Difference]: With dead ends: 9677 [2021-12-17 03:00:15,221 INFO L226 Difference]: Without dead ends: 5577 [2021-12-17 03:00:15,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-12-17 03:00:15,229 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 1014 mSDsluCounter, 1390 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 391 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 2035 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:15,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1036 Valid, 2035 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 987 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-17 03:00:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5577 states. [2021-12-17 03:00:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5577 to 4523. [2021-12-17 03:00:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4523 states, 3844 states have (on average 1.4456295525494276) internal successors, (5557), 3958 states have internal predecessors, (5557), 468 states have call successors, (468), 161 states have call predecessors, (468), 210 states have return successors, (648), 418 states have call predecessors, (648), 449 states have call successors, (648) [2021-12-17 03:00:15,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4523 states to 4523 states and 6673 transitions. [2021-12-17 03:00:15,479 INFO L78 Accepts]: Start accepts. Automaton has 4523 states and 6673 transitions. Word has length 71 [2021-12-17 03:00:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:15,480 INFO L470 AbstractCegarLoop]: Abstraction has 4523 states and 6673 transitions. [2021-12-17 03:00:15,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:00:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 4523 states and 6673 transitions. [2021-12-17 03:00:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-17 03:00:15,481 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:15,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:15,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-12-17 03:00:15,481 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:15,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:15,482 INFO L85 PathProgramCache]: Analyzing trace with hash 885604175, now seen corresponding path program 1 times [2021-12-17 03:00:15,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:15,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911296114] [2021-12-17 03:00:15,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:15,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:15,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:15,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:15,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:15,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-17 03:00:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:15,668 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:15,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911296114] [2021-12-17 03:00:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911296114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:15,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:15,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:00:15,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411778601] [2021-12-17 03:00:15,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:15,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:00:15,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:15,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:00:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:00:15,670 INFO L87 Difference]: Start difference. First operand 4523 states and 6673 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:00:19,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:21,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:21,150 INFO L93 Difference]: Finished difference Result 5409 states and 8142 transitions. [2021-12-17 03:00:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:00:21,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 69 [2021-12-17 03:00:21,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:21,160 INFO L225 Difference]: With dead ends: 5409 [2021-12-17 03:00:21,160 INFO L226 Difference]: Without dead ends: 5388 [2021-12-17 03:00:21,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:00:21,162 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 872 mSDsluCounter, 3578 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 360 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 896 SdHoareTripleChecker+Valid, 4223 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:21,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [896 Valid, 4223 Invalid, 3071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 2710 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2021-12-17 03:00:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-12-17 03:00:21,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4519. [2021-12-17 03:00:21,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4519 states, 3841 states have (on average 1.445717261129914) internal successors, (5553), 3955 states have internal predecessors, (5553), 467 states have call successors, (467), 161 states have call predecessors, (467), 210 states have return successors, (647), 417 states have call predecessors, (647), 448 states have call successors, (647) [2021-12-17 03:00:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4519 states to 4519 states and 6667 transitions. [2021-12-17 03:00:21,419 INFO L78 Accepts]: Start accepts. Automaton has 4519 states and 6667 transitions. Word has length 69 [2021-12-17 03:00:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:21,419 INFO L470 AbstractCegarLoop]: Abstraction has 4519 states and 6667 transitions. [2021-12-17 03:00:21,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:00:21,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4519 states and 6667 transitions. [2021-12-17 03:00:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-12-17 03:00:21,421 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:21,421 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:21,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-12-17 03:00:21,421 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:21,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:21,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1081372361, now seen corresponding path program 1 times [2021-12-17 03:00:21,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:21,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807153787] [2021-12-17 03:00:21,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:21,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:21,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:21,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:21,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:21,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:21,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:00:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:21,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 03:00:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:21,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:21,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:21,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807153787] [2021-12-17 03:00:21,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807153787] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:21,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:21,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:00:21,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351301495] [2021-12-17 03:00:21,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:21,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:00:21,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:21,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:00:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:00:21,598 INFO L87 Difference]: Start difference. First operand 4519 states and 6667 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:00:25,580 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:27,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:28,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:28,864 INFO L93 Difference]: Finished difference Result 8192 states and 12275 transitions. [2021-12-17 03:00:28,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 03:00:28,865 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 71 [2021-12-17 03:00:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:28,876 INFO L225 Difference]: With dead ends: 8192 [2021-12-17 03:00:28,876 INFO L226 Difference]: Without dead ends: 5661 [2021-12-17 03:00:28,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:00:28,882 INFO L933 BasicCegarLoop]: 624 mSDtfsCounter, 811 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 204 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 2235 SdHoareTripleChecker+Invalid, 1640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:28,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 2235 Invalid, 1640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1434 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2021-12-17 03:00:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-12-17 03:00:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 4579. [2021-12-17 03:00:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 3901 states have (on average 1.4388618302999232) internal successors, (5613), 4015 states have internal predecessors, (5613), 467 states have call successors, (467), 161 states have call predecessors, (467), 210 states have return successors, (647), 417 states have call predecessors, (647), 448 states have call successors, (647) [2021-12-17 03:00:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 6727 transitions. [2021-12-17 03:00:29,170 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 6727 transitions. Word has length 71 [2021-12-17 03:00:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:29,173 INFO L470 AbstractCegarLoop]: Abstraction has 4579 states and 6727 transitions. [2021-12-17 03:00:29,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:00:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 6727 transitions. [2021-12-17 03:00:29,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 03:00:29,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:29,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:29,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-12-17 03:00:29,174 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:29,175 INFO L85 PathProgramCache]: Analyzing trace with hash -100745951, now seen corresponding path program 1 times [2021-12-17 03:00:29,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:29,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793992218] [2021-12-17 03:00:29,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:29,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:29,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:29,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:29,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-17 03:00:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:29,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:29,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793992218] [2021-12-17 03:00:29,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793992218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:29,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:29,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:00:29,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190283025] [2021-12-17 03:00:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:00:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:00:29,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:00:29,375 INFO L87 Difference]: Start difference. First operand 4579 states and 6727 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:00:34,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:35,404 INFO L93 Difference]: Finished difference Result 5465 states and 8196 transitions. [2021-12-17 03:00:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:00:35,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 70 [2021-12-17 03:00:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:35,416 INFO L225 Difference]: With dead ends: 5465 [2021-12-17 03:00:35,416 INFO L226 Difference]: Without dead ends: 5444 [2021-12-17 03:00:35,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:00:35,419 INFO L933 BasicCegarLoop]: 642 mSDtfsCounter, 871 mSDsluCounter, 3553 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 353 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 895 SdHoareTripleChecker+Valid, 4195 SdHoareTripleChecker+Invalid, 3059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:35,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [895 Valid, 4195 Invalid, 3059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 2705 Invalid, 1 Unknown, 0 Unchecked, 5.5s Time] [2021-12-17 03:00:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5444 states. [2021-12-17 03:00:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5444 to 4575. [2021-12-17 03:00:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 3898 states have (on average 1.438943047716778) internal successors, (5609), 4012 states have internal predecessors, (5609), 466 states have call successors, (466), 161 states have call predecessors, (466), 210 states have return successors, (646), 416 states have call predecessors, (646), 447 states have call successors, (646) [2021-12-17 03:00:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 6721 transitions. [2021-12-17 03:00:35,682 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 6721 transitions. Word has length 70 [2021-12-17 03:00:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:35,682 INFO L470 AbstractCegarLoop]: Abstraction has 4575 states and 6721 transitions. [2021-12-17 03:00:35,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-17 03:00:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 6721 transitions. [2021-12-17 03:00:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 03:00:35,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:35,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:35,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-12-17 03:00:35,684 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:35,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:35,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2023695595, now seen corresponding path program 1 times [2021-12-17 03:00:35,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:35,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213844560] [2021-12-17 03:00:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:35,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:35,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:35,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:35,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:00:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:36,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-17 03:00:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:36,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 03:00:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:36,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:36,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213844560] [2021-12-17 03:00:36,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213844560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:36,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:36,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:00:36,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083466851] [2021-12-17 03:00:36,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:36,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:00:36,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:00:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:00:36,057 INFO L87 Difference]: Start difference. First operand 4575 states and 6721 transitions. Second operand has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:00:40,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:40,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:40,587 INFO L93 Difference]: Finished difference Result 5021 states and 7315 transitions. [2021-12-17 03:00:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 03:00:40,588 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2021-12-17 03:00:40,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:40,590 INFO L225 Difference]: With dead ends: 5021 [2021-12-17 03:00:40,590 INFO L226 Difference]: Without dead ends: 770 [2021-12-17 03:00:40,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-12-17 03:00:40,597 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 640 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 240 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 2061 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:40,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [653 Valid, 2061 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1031 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-12-17 03:00:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2021-12-17 03:00:40,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 735. [2021-12-17 03:00:40,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 624 states have (on average 1.3012820512820513) internal successors, (812), 637 states have internal predecessors, (812), 69 states have call successors, (69), 35 states have call predecessors, (69), 41 states have return successors, (85), 65 states have call predecessors, (85), 61 states have call successors, (85) [2021-12-17 03:00:40,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 966 transitions. [2021-12-17 03:00:40,634 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 966 transitions. Word has length 72 [2021-12-17 03:00:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:40,636 INFO L470 AbstractCegarLoop]: Abstraction has 735 states and 966 transitions. [2021-12-17 03:00:40,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.625) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:00:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 966 transitions. [2021-12-17 03:00:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 03:00:40,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:40,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:40,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-12-17 03:00:40,638 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:40,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:40,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1623584585, now seen corresponding path program 1 times [2021-12-17 03:00:40,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:40,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70045581] [2021-12-17 03:00:40,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:40,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:40,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:40,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:40,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:00:40,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:40,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-17 03:00:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:40,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:40,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 03:00:40,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:40,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 03:00:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-17 03:00:40,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:40,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70045581] [2021-12-17 03:00:40,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70045581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:40,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:40,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:00:40,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019985705] [2021-12-17 03:00:40,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:40,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:00:40,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:40,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:00:40,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:00:40,986 INFO L87 Difference]: Start difference. First operand 735 states and 966 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 03:00:46,494 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:47,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:47,058 INFO L93 Difference]: Finished difference Result 779 states and 1025 transitions. [2021-12-17 03:00:47,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 03:00:47,059 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 75 [2021-12-17 03:00:47,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:47,061 INFO L225 Difference]: With dead ends: 779 [2021-12-17 03:00:47,061 INFO L226 Difference]: Without dead ends: 741 [2021-12-17 03:00:47,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:00:47,061 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 669 mSDsluCounter, 3197 mSDsCounter, 0 mSdLazyCounter, 1962 mSolverCounterSat, 180 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 3707 SdHoareTripleChecker+Invalid, 2143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1962 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:47,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 3707 Invalid, 2143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1962 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2021-12-17 03:00:47,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-12-17 03:00:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 715. [2021-12-17 03:00:47,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 610 states have (on average 1.3032786885245902) internal successors, (795), 623 states have internal predecessors, (795), 65 states have call successors, (65), 33 states have call predecessors, (65), 39 states have return successors, (81), 61 states have call predecessors, (81), 57 states have call successors, (81) [2021-12-17 03:00:47,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 941 transitions. [2021-12-17 03:00:47,096 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 941 transitions. Word has length 75 [2021-12-17 03:00:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:47,097 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 941 transitions. [2021-12-17 03:00:47,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 6 states have internal predecessors, (58), 2 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 03:00:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 941 transitions. [2021-12-17 03:00:47,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-17 03:00:47,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:47,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-12-17 03:00:47,098 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:47,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1736062830, now seen corresponding path program 1 times [2021-12-17 03:00:47,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:47,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025271846] [2021-12-17 03:00:47,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:47,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:47,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:47,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:47,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:47,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:00:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:47,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:47,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:47,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 03:00:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:47,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-17 03:00:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:47,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:47,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:47,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025271846] [2021-12-17 03:00:47,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025271846] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:47,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:47,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:00:47,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774169978] [2021-12-17 03:00:47,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:47,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:00:47,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:00:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:00:47,360 INFO L87 Difference]: Start difference. First operand 715 states and 941 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:00:52,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:54,310 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:54,762 INFO L93 Difference]: Finished difference Result 761 states and 1003 transitions. [2021-12-17 03:00:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 03:00:54,762 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 75 [2021-12-17 03:00:54,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:54,764 INFO L225 Difference]: With dead ends: 761 [2021-12-17 03:00:54,764 INFO L226 Difference]: Without dead ends: 715 [2021-12-17 03:00:54,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:00:54,765 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 488 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 111 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 2810 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:54,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 2810 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1586 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2021-12-17 03:00:54,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-12-17 03:00:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 693. [2021-12-17 03:00:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 693 states, 592 states have (on average 1.3057432432432432) internal successors, (773), 605 states have internal predecessors, (773), 61 states have call successors, (61), 33 states have call predecessors, (61), 39 states have return successors, (77), 57 states have call predecessors, (77), 53 states have call successors, (77) [2021-12-17 03:00:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 693 states to 693 states and 911 transitions. [2021-12-17 03:00:54,796 INFO L78 Accepts]: Start accepts. Automaton has 693 states and 911 transitions. Word has length 75 [2021-12-17 03:00:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:54,796 INFO L470 AbstractCegarLoop]: Abstraction has 693 states and 911 transitions. [2021-12-17 03:00:54,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 3 states have call successors, (7), 6 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:00:54,796 INFO L276 IsEmpty]: Start isEmpty. Operand 693 states and 911 transitions. [2021-12-17 03:00:54,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-17 03:00:54,797 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:54,797 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:54,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-12-17 03:00:54,797 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:54,797 INFO L85 PathProgramCache]: Analyzing trace with hash -496016635, now seen corresponding path program 1 times [2021-12-17 03:00:54,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:54,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671657124] [2021-12-17 03:00:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:54,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:54,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:54,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:54,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:00:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:54,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:00:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:54,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:00:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:54,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:55,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:55,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671657124] [2021-12-17 03:00:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671657124] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:55,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:55,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:00:55,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393140952] [2021-12-17 03:00:55,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:55,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:00:55,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:00:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:00:55,006 INFO L87 Difference]: Start difference. First operand 693 states and 911 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 03:00:58,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:00:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:00:58,796 INFO L93 Difference]: Finished difference Result 1098 states and 1473 transitions. [2021-12-17 03:00:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 03:00:58,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 76 [2021-12-17 03:00:58,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:00:58,801 INFO L225 Difference]: With dead ends: 1098 [2021-12-17 03:00:58,801 INFO L226 Difference]: Without dead ends: 748 [2021-12-17 03:00:58,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-12-17 03:00:58,802 INFO L933 BasicCegarLoop]: 456 mSDtfsCounter, 794 mSDsluCounter, 2127 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 271 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 2583 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:00:58,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [802 Valid, 2583 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1165 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-12-17 03:00:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-12-17 03:00:58,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 709. [2021-12-17 03:00:58,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 709 states, 606 states have (on average 1.3036303630363035) internal successors, (790), 619 states have internal predecessors, (790), 61 states have call successors, (61), 33 states have call predecessors, (61), 41 states have return successors, (85), 59 states have call predecessors, (85), 53 states have call successors, (85) [2021-12-17 03:00:58,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 709 states to 709 states and 936 transitions. [2021-12-17 03:00:58,839 INFO L78 Accepts]: Start accepts. Automaton has 709 states and 936 transitions. Word has length 76 [2021-12-17 03:00:58,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:00:58,840 INFO L470 AbstractCegarLoop]: Abstraction has 709 states and 936 transitions. [2021-12-17 03:00:58,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-17 03:00:58,840 INFO L276 IsEmpty]: Start isEmpty. Operand 709 states and 936 transitions. [2021-12-17 03:00:58,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 03:00:58,841 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:00:58,841 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:00:58,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-12-17 03:00:58,841 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:00:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:00:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1257721170, now seen corresponding path program 1 times [2021-12-17 03:00:58,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:00:58,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517011631] [2021-12-17 03:00:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:00:58,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:00:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:00:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:58,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:00:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:59,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:00:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:59,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 03:00:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:00:59,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:00:59,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:00:59,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517011631] [2021-12-17 03:00:59,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517011631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:00:59,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:00:59,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:00:59,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660146555] [2021-12-17 03:00:59,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:00:59,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:00:59,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:00:59,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:00:59,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:00:59,057 INFO L87 Difference]: Start difference. First operand 709 states and 936 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:01:02,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:02,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:02,381 INFO L93 Difference]: Finished difference Result 773 states and 1023 transitions. [2021-12-17 03:01:02,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 03:01:02,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2021-12-17 03:01:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:02,384 INFO L225 Difference]: With dead ends: 773 [2021-12-17 03:01:02,384 INFO L226 Difference]: Without dead ends: 748 [2021-12-17 03:01:02,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:01:02,384 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 509 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 160 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:02,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 1426 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 722 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 03:01:02,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2021-12-17 03:01:02,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 711. [2021-12-17 03:01:02,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 608 states have (on average 1.3108552631578947) internal successors, (797), 621 states have internal predecessors, (797), 61 states have call successors, (61), 33 states have call predecessors, (61), 41 states have return successors, (85), 59 states have call predecessors, (85), 53 states have call successors, (85) [2021-12-17 03:01:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 943 transitions. [2021-12-17 03:01:02,417 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 943 transitions. Word has length 74 [2021-12-17 03:01:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:02,417 INFO L470 AbstractCegarLoop]: Abstraction has 711 states and 943 transitions. [2021-12-17 03:01:02,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:01:02,418 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 943 transitions. [2021-12-17 03:01:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 03:01:02,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:02,418 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] [2021-12-17 03:01:02,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-12-17 03:01:02,419 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:02,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:02,419 INFO L85 PathProgramCache]: Analyzing trace with hash -280765008, now seen corresponding path program 1 times [2021-12-17 03:01:02,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:02,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918725603] [2021-12-17 03:01:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:02,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:02,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:02,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:02,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:02,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:01:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:02,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-17 03:01:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:02,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:02,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:02,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918725603] [2021-12-17 03:01:02,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918725603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:02,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:02,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:01:02,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800641773] [2021-12-17 03:01:02,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:02,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:01:02,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:02,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:01:02,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:01:02,663 INFO L87 Difference]: Start difference. First operand 711 states and 943 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 03:01:06,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:06,651 INFO L93 Difference]: Finished difference Result 746 states and 989 transitions. [2021-12-17 03:01:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:01:06,651 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 74 [2021-12-17 03:01:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:06,653 INFO L225 Difference]: With dead ends: 746 [2021-12-17 03:01:06,653 INFO L226 Difference]: Without dead ends: 726 [2021-12-17 03:01:06,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:01:06,653 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 462 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 143 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 3111 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:06,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 3111 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1813 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-12-17 03:01:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-12-17 03:01:06,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 704. [2021-12-17 03:01:06,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 603 states have (on average 1.3101160862354893) internal successors, (790), 616 states have internal predecessors, (790), 60 states have call successors, (60), 33 states have call predecessors, (60), 40 states have return successors, (83), 57 states have call predecessors, (83), 52 states have call successors, (83) [2021-12-17 03:01:06,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 933 transitions. [2021-12-17 03:01:06,687 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 933 transitions. Word has length 74 [2021-12-17 03:01:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:06,687 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 933 transitions. [2021-12-17 03:01:06,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 6 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 03:01:06,688 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 933 transitions. [2021-12-17 03:01:06,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 03:01:06,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:06,688 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] [2021-12-17 03:01:06,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-12-17 03:01:06,689 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:06,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:06,689 INFO L85 PathProgramCache]: Analyzing trace with hash 480971669, now seen corresponding path program 1 times [2021-12-17 03:01:06,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:06,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816692165] [2021-12-17 03:01:06,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:06,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:06,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:06,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:06,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:01:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:06,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-17 03:01:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:06,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:06,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:06,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816692165] [2021-12-17 03:01:06,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816692165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:06,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:06,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:01:06,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044276358] [2021-12-17 03:01:06,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:06,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:01:06,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:06,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:01:06,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:01:06,867 INFO L87 Difference]: Start difference. First operand 704 states and 933 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:01:09,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:10,060 INFO L93 Difference]: Finished difference Result 767 states and 1014 transitions. [2021-12-17 03:01:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:01:10,060 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2021-12-17 03:01:10,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:10,062 INFO L225 Difference]: With dead ends: 767 [2021-12-17 03:01:10,062 INFO L226 Difference]: Without dead ends: 742 [2021-12-17 03:01:10,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:01:10,062 INFO L933 BasicCegarLoop]: 463 mSDtfsCounter, 500 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 150 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 505 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:10,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [505 Valid, 1484 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 764 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 03:01:10,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 742 states. [2021-12-17 03:01:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 742 to 704. [2021-12-17 03:01:10,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 603 states have (on average 1.3101160862354893) internal successors, (790), 616 states have internal predecessors, (790), 60 states have call successors, (60), 33 states have call predecessors, (60), 40 states have return successors, (83), 57 states have call predecessors, (83), 52 states have call successors, (83) [2021-12-17 03:01:10,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 933 transitions. [2021-12-17 03:01:10,102 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 933 transitions. Word has length 74 [2021-12-17 03:01:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:10,103 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 933 transitions. [2021-12-17 03:01:10,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 03:01:10,103 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 933 transitions. [2021-12-17 03:01:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 03:01:10,104 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:10,104 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] [2021-12-17 03:01:10,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-12-17 03:01:10,104 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:10,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1022183255, now seen corresponding path program 1 times [2021-12-17 03:01:10,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:10,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377293726] [2021-12-17 03:01:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:10,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:10,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:10,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:10,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:01:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:10,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:01:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:10,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:01:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:10,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:10,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:10,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:10,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:10,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377293726] [2021-12-17 03:01:10,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377293726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:10,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:10,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 03:01:10,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420692054] [2021-12-17 03:01:10,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:10,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 03:01:10,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:10,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 03:01:10,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:01:10,310 INFO L87 Difference]: Start difference. First operand 704 states and 933 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:01:13,885 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:16,029 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:18,192 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:18,647 INFO L93 Difference]: Finished difference Result 1416 states and 1930 transitions. [2021-12-17 03:01:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-17 03:01:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 77 [2021-12-17 03:01:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:18,653 INFO L225 Difference]: With dead ends: 1416 [2021-12-17 03:01:18,653 INFO L226 Difference]: Without dead ends: 1065 [2021-12-17 03:01:18,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=206, Invalid=550, Unknown=0, NotChecked=0, Total=756 [2021-12-17 03:01:18,655 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 1746 mSDsluCounter, 1317 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 523 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1775 SdHoareTripleChecker+Valid, 1829 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:18,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1775 Valid, 1829 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 1195 Invalid, 3 Unknown, 0 Unchecked, 7.9s Time] [2021-12-17 03:01:18,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-12-17 03:01:18,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 868. [2021-12-17 03:01:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 746 states have (on average 1.3136729222520107) internal successors, (980), 763 states have internal predecessors, (980), 71 states have call successors, (71), 40 states have call predecessors, (71), 50 states have return successors, (115), 67 states have call predecessors, (115), 63 states have call successors, (115) [2021-12-17 03:01:18,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1166 transitions. [2021-12-17 03:01:18,704 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1166 transitions. Word has length 77 [2021-12-17 03:01:18,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:18,704 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1166 transitions. [2021-12-17 03:01:18,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 03:01:18,705 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1166 transitions. [2021-12-17 03:01:18,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 03:01:18,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:18,706 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] [2021-12-17 03:01:18,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-12-17 03:01:18,706 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:18,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:18,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1282723427, now seen corresponding path program 1 times [2021-12-17 03:01:18,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:18,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412122801] [2021-12-17 03:01:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:18,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:18,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:18,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:18,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:18,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:01:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:18,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 03:01:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:18,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:01:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:18,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:18,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412122801] [2021-12-17 03:01:18,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412122801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:18,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:18,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:01:18,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803499529] [2021-12-17 03:01:18,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:18,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:01:18,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:18,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:01:18,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:01:18,955 INFO L87 Difference]: Start difference. First operand 868 states and 1166 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:01:22,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:24,904 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:25,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:25,389 INFO L93 Difference]: Finished difference Result 915 states and 1226 transitions. [2021-12-17 03:01:25,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:01:25,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 77 [2021-12-17 03:01:25,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:25,392 INFO L225 Difference]: With dead ends: 915 [2021-12-17 03:01:25,392 INFO L226 Difference]: Without dead ends: 831 [2021-12-17 03:01:25,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:01:25,393 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 462 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 141 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 2693 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:25,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 2693 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1626 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2021-12-17 03:01:25,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2021-12-17 03:01:25,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 807. [2021-12-17 03:01:25,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 686 states have (on average 1.2784256559766765) internal successors, (877), 705 states have internal predecessors, (877), 70 states have call successors, (70), 40 states have call predecessors, (70), 50 states have return successors, (112), 64 states have call predecessors, (112), 62 states have call successors, (112) [2021-12-17 03:01:25,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1059 transitions. [2021-12-17 03:01:25,438 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1059 transitions. Word has length 77 [2021-12-17 03:01:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:25,438 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1059 transitions. [2021-12-17 03:01:25,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 5 states have internal predecessors, (66), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:01:25,438 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1059 transitions. [2021-12-17 03:01:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-17 03:01:25,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:25,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:25,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-12-17 03:01:25,439 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:25,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:25,439 INFO L85 PathProgramCache]: Analyzing trace with hash 900956810, now seen corresponding path program 1 times [2021-12-17 03:01:25,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:25,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116173440] [2021-12-17 03:01:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:25,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:25,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:25,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:25,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:01:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:25,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 03:01:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:25,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:25,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116173440] [2021-12-17 03:01:25,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116173440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:25,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:25,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:01:25,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446651705] [2021-12-17 03:01:25,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:25,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:01:25,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:01:25,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:01:25,696 INFO L87 Difference]: Start difference. First operand 807 states and 1059 transitions. Second operand has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 03:01:28,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:28,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:28,942 INFO L93 Difference]: Finished difference Result 873 states and 1142 transitions. [2021-12-17 03:01:28,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:01:28,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 79 [2021-12-17 03:01:28,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:28,944 INFO L225 Difference]: With dead ends: 873 [2021-12-17 03:01:28,944 INFO L226 Difference]: Without dead ends: 821 [2021-12-17 03:01:28,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:01:28,945 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 285 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 161 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 2176 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:28,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 2176 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 760 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 03:01:28,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-12-17 03:01:28,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 799. [2021-12-17 03:01:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 680 states have (on average 1.2779411764705881) internal successors, (869), 698 states have internal predecessors, (869), 69 states have call successors, (69), 40 states have call predecessors, (69), 49 states have return successors, (110), 63 states have call predecessors, (110), 61 states have call successors, (110) [2021-12-17 03:01:28,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1048 transitions. [2021-12-17 03:01:28,987 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1048 transitions. Word has length 79 [2021-12-17 03:01:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:28,988 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1048 transitions. [2021-12-17 03:01:28,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.0) internal successors, (70), 5 states have internal predecessors, (70), 2 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 03:01:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1048 transitions. [2021-12-17 03:01:28,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 03:01:28,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:28,989 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] [2021-12-17 03:01:28,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-12-17 03:01:28,989 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:28,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:28,989 INFO L85 PathProgramCache]: Analyzing trace with hash 788040377, now seen corresponding path program 1 times [2021-12-17 03:01:28,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:28,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028945320] [2021-12-17 03:01:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:28,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:01:29,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:01:29,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:01:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:29,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:29,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:29,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028945320] [2021-12-17 03:01:29,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028945320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:29,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:29,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:01:29,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117609864] [2021-12-17 03:01:29,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:29,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:01:29,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:29,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:01:29,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:01:29,190 INFO L87 Difference]: Start difference. First operand 799 states and 1048 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 03:01:32,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:32,511 INFO L93 Difference]: Finished difference Result 1348 states and 1805 transitions. [2021-12-17 03:01:32,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:01:32,512 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 83 [2021-12-17 03:01:32,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:32,516 INFO L225 Difference]: With dead ends: 1348 [2021-12-17 03:01:32,516 INFO L226 Difference]: Without dead ends: 845 [2021-12-17 03:01:32,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:01:32,517 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 556 mSDsluCounter, 1052 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 250 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:32,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 1449 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 643 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 03:01:32,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-17 03:01:32,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 804. [2021-12-17 03:01:32,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 685 states have (on average 1.2802919708029197) internal successors, (877), 703 states have internal predecessors, (877), 69 states have call successors, (69), 40 states have call predecessors, (69), 49 states have return successors, (110), 63 states have call predecessors, (110), 61 states have call successors, (110) [2021-12-17 03:01:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 1056 transitions. [2021-12-17 03:01:32,565 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 1056 transitions. Word has length 83 [2021-12-17 03:01:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:32,565 INFO L470 AbstractCegarLoop]: Abstraction has 804 states and 1056 transitions. [2021-12-17 03:01:32,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (9), 7 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-17 03:01:32,566 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 1056 transitions. [2021-12-17 03:01:32,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-17 03:01:32,566 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:32,566 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] [2021-12-17 03:01:32,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-12-17 03:01:32,567 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:32,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:32,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1500515065, now seen corresponding path program 1 times [2021-12-17 03:01:32,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:32,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948667830] [2021-12-17 03:01:32,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:32,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:32,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:32,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:32,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:32,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:01:32,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:32,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:01:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:32,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:01:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:32,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:32,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:32,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:32,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:32,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948667830] [2021-12-17 03:01:32,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948667830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:32,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:32,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 03:01:32,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662374854] [2021-12-17 03:01:32,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:32,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 03:01:32,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:32,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 03:01:32,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-17 03:01:32,764 INFO L87 Difference]: Start difference. First operand 804 states and 1056 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:01:35,727 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:37,902 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:38,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:38,251 INFO L93 Difference]: Finished difference Result 1485 states and 1967 transitions. [2021-12-17 03:01:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 03:01:38,251 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 83 [2021-12-17 03:01:38,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:38,256 INFO L225 Difference]: With dead ends: 1485 [2021-12-17 03:01:38,256 INFO L226 Difference]: Without dead ends: 997 [2021-12-17 03:01:38,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:01:38,257 INFO L933 BasicCegarLoop]: 450 mSDtfsCounter, 753 mSDsluCounter, 1036 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 320 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 1486 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:38,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [762 Valid, 1486 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 682 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 03:01:38,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-12-17 03:01:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 941. [2021-12-17 03:01:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 798 states have (on average 1.2744360902255638) internal successors, (1017), 820 states have internal predecessors, (1017), 80 states have call successors, (80), 46 states have call predecessors, (80), 62 states have return successors, (135), 78 states have call predecessors, (135), 73 states have call successors, (135) [2021-12-17 03:01:38,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1232 transitions. [2021-12-17 03:01:38,306 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1232 transitions. Word has length 83 [2021-12-17 03:01:38,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:38,306 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 1232 transitions. [2021-12-17 03:01:38,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 3 states have internal predecessors, (67), 3 states have call successors, (9), 8 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:01:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1232 transitions. [2021-12-17 03:01:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-17 03:01:38,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:38,307 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] [2021-12-17 03:01:38,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-12-17 03:01:38,308 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:38,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:38,308 INFO L85 PathProgramCache]: Analyzing trace with hash 318266731, now seen corresponding path program 1 times [2021-12-17 03:01:38,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:38,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062679679] [2021-12-17 03:01:38,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:38,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:01:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:01:38,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:01:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-17 03:01:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:38,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:38,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:38,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062679679] [2021-12-17 03:01:38,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062679679] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:38,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:38,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:01:38,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870031392] [2021-12-17 03:01:38,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:38,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:01:38,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:38,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:01:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:01:38,563 INFO L87 Difference]: Start difference. First operand 941 states and 1232 transitions. Second operand has 10 states, 10 states have (on average 6.9) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:01:41,936 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:42,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:42,337 INFO L93 Difference]: Finished difference Result 1448 states and 1924 transitions. [2021-12-17 03:01:42,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 03:01:42,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 85 [2021-12-17 03:01:42,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:42,342 INFO L225 Difference]: With dead ends: 1448 [2021-12-17 03:01:42,342 INFO L226 Difference]: Without dead ends: 874 [2021-12-17 03:01:42,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-17 03:01:42,343 INFO L933 BasicCegarLoop]: 392 mSDtfsCounter, 370 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 174 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 2018 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:42,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 2018 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 915 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-12-17 03:01:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2021-12-17 03:01:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 854. [2021-12-17 03:01:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 718 states have (on average 1.2576601671309193) internal successors, (903), 738 states have internal predecessors, (903), 77 states have call successors, (77), 44 states have call predecessors, (77), 58 states have return successors, (129), 75 states have call predecessors, (129), 71 states have call successors, (129) [2021-12-17 03:01:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 1109 transitions. [2021-12-17 03:01:42,393 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 1109 transitions. Word has length 85 [2021-12-17 03:01:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:42,394 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 1109 transitions. [2021-12-17 03:01:42,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.9) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (9), 7 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 03:01:42,394 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 1109 transitions. [2021-12-17 03:01:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 03:01:42,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:42,395 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:42,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-12-17 03:01:42,395 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:42,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:42,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1988792666, now seen corresponding path program 1 times [2021-12-17 03:01:42,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:42,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830549022] [2021-12-17 03:01:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:42,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:01:42,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 03:01:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 03:01:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-17 03:01:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:42,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:42,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830549022] [2021-12-17 03:01:42,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830549022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:42,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:42,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:01:42,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950327744] [2021-12-17 03:01:42,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:42,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:01:42,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:42,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:01:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:01:42,660 INFO L87 Difference]: Start difference. First operand 854 states and 1109 transitions. Second operand has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 03:01:45,929 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:46,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:46,262 INFO L93 Difference]: Finished difference Result 1250 states and 1625 transitions. [2021-12-17 03:01:46,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:01:46,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-17 03:01:46,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:46,266 INFO L225 Difference]: With dead ends: 1250 [2021-12-17 03:01:46,266 INFO L226 Difference]: Without dead ends: 763 [2021-12-17 03:01:46,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-12-17 03:01:46,267 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 942 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 347 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 968 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:46,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [968 Valid, 1549 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 904 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 03:01:46,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-12-17 03:01:46,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 743. [2021-12-17 03:01:46,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 625 states have (on average 1.2448) internal successors, (778), 642 states have internal predecessors, (778), 68 states have call successors, (68), 40 states have call predecessors, (68), 49 states have return successors, (99), 64 states have call predecessors, (99), 62 states have call successors, (99) [2021-12-17 03:01:46,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 945 transitions. [2021-12-17 03:01:46,308 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 945 transitions. Word has length 93 [2021-12-17 03:01:46,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:46,308 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 945 transitions. [2021-12-17 03:01:46,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.818181818181818) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 03:01:46,308 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 945 transitions. [2021-12-17 03:01:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 03:01:46,309 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:46,309 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] [2021-12-17 03:01:46,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-12-17 03:01:46,309 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:46,310 INFO L85 PathProgramCache]: Analyzing trace with hash 868554885, now seen corresponding path program 1 times [2021-12-17 03:01:46,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:46,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680162526] [2021-12-17 03:01:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:46,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:46,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:46,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:46,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:46,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:01:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:46,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-17 03:01:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:46,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 03:01:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:46,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:46,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680162526] [2021-12-17 03:01:46,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680162526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:46,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:46,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:01:46,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311517910] [2021-12-17 03:01:46,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:46,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:01:46,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:01:46,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:01:46,552 INFO L87 Difference]: Start difference. First operand 743 states and 945 transitions. Second operand has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:01:50,113 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:52,150 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:52,614 INFO L93 Difference]: Finished difference Result 780 states and 994 transitions. [2021-12-17 03:01:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:01:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 86 [2021-12-17 03:01:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:52,617 INFO L225 Difference]: With dead ends: 780 [2021-12-17 03:01:52,617 INFO L226 Difference]: Without dead ends: 728 [2021-12-17 03:01:52,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:01:52,617 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 285 mSDsluCounter, 2156 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 88 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 2535 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:52,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 2535 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1732 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-12-17 03:01:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-12-17 03:01:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 708. [2021-12-17 03:01:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 597 states have (on average 1.2479061976549413) internal successors, (745), 614 states have internal predecessors, (745), 64 states have call successors, (64), 37 states have call predecessors, (64), 46 states have return successors, (95), 60 states have call predecessors, (95), 58 states have call successors, (95) [2021-12-17 03:01:52,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 904 transitions. [2021-12-17 03:01:52,655 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 904 transitions. Word has length 86 [2021-12-17 03:01:52,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:52,655 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 904 transitions. [2021-12-17 03:01:52,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.25) internal successors, (75), 7 states have internal predecessors, (75), 3 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 03:01:52,656 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 904 transitions. [2021-12-17 03:01:52,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-12-17 03:01:52,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:52,656 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] [2021-12-17 03:01:52,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-12-17 03:01:52,657 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:52,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:52,657 INFO L85 PathProgramCache]: Analyzing trace with hash 773093388, now seen corresponding path program 1 times [2021-12-17 03:01:52,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:52,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934063906] [2021-12-17 03:01:52,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:52,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:52,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:52,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:52,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 03:01:52,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:52,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 03:01:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-17 03:01:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:52,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:52,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:52,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934063906] [2021-12-17 03:01:52,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934063906] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:52,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:52,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:01:52,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722549233] [2021-12-17 03:01:52,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:52,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:01:52,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:52,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:01:52,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:01:52,863 INFO L87 Difference]: Start difference. First operand 708 states and 904 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 03:01:55,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:58,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:01:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:01:58,545 INFO L93 Difference]: Finished difference Result 1296 states and 1626 transitions. [2021-12-17 03:01:58,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:01:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 86 [2021-12-17 03:01:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:01:58,549 INFO L225 Difference]: With dead ends: 1296 [2021-12-17 03:01:58,549 INFO L226 Difference]: Without dead ends: 901 [2021-12-17 03:01:58,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-17 03:01:58,550 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 1087 mSDsluCounter, 1423 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 346 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:01:58,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 1846 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 918 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-12-17 03:01:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2021-12-17 03:01:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 787. [2021-12-17 03:01:58,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 663 states have (on average 1.2307692307692308) internal successors, (816), 679 states have internal predecessors, (816), 66 states have call successors, (66), 47 states have call predecessors, (66), 57 states have return successors, (88), 65 states have call predecessors, (88), 60 states have call successors, (88) [2021-12-17 03:01:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 970 transitions. [2021-12-17 03:01:58,601 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 970 transitions. Word has length 86 [2021-12-17 03:01:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:01:58,601 INFO L470 AbstractCegarLoop]: Abstraction has 787 states and 970 transitions. [2021-12-17 03:01:58,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 5 states have internal predecessors, (75), 3 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-17 03:01:58,602 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 970 transitions. [2021-12-17 03:01:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-17 03:01:58,602 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:01:58,603 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:01:58,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-12-17 03:01:58,603 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:01:58,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:01:58,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1759913001, now seen corresponding path program 1 times [2021-12-17 03:01:58,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:01:58,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694317681] [2021-12-17 03:01:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:01:58,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:01:58,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:58,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:58,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:01:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:58,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 03:01:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:58,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 03:01:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:58,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:01:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:58,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:01:58,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-17 03:01:59,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:01:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:01:59,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:01:59,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694317681] [2021-12-17 03:01:59,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694317681] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:01:59,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:01:59,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:01:59,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117458914] [2021-12-17 03:01:59,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:01:59,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:01:59,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:01:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:01:59,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:01:59,025 INFO L87 Difference]: Start difference. First operand 787 states and 970 transitions. Second operand has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 03:02:02,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:02,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:02,961 INFO L93 Difference]: Finished difference Result 1204 states and 1507 transitions. [2021-12-17 03:02:02,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 03:02:02,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 96 [2021-12-17 03:02:02,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:02,964 INFO L225 Difference]: With dead ends: 1204 [2021-12-17 03:02:02,964 INFO L226 Difference]: Without dead ends: 797 [2021-12-17 03:02:02,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:02:02,965 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 318 mSDsluCounter, 1944 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 121 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2300 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:02,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 2300 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1142 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-12-17 03:02:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-12-17 03:02:03,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 776. [2021-12-17 03:02:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 655 states have (on average 1.2274809160305344) internal successors, (804), 670 states have internal predecessors, (804), 64 states have call successors, (64), 46 states have call predecessors, (64), 56 states have return successors, (87), 64 states have call predecessors, (87), 59 states have call successors, (87) [2021-12-17 03:02:03,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 955 transitions. [2021-12-17 03:02:03,011 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 955 transitions. Word has length 96 [2021-12-17 03:02:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:03,011 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 955 transitions. [2021-12-17 03:02:03,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.5) internal successors, (78), 5 states have internal predecessors, (78), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 03:02:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 955 transitions. [2021-12-17 03:02:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 03:02:03,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:03,012 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:03,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-12-17 03:02:03,012 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:03,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:03,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1920923923, now seen corresponding path program 1 times [2021-12-17 03:02:03,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:03,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548281214] [2021-12-17 03:02:03,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:03,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:03,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:03,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:03,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 03:02:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:03,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 03:02:03,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:03,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 03:02:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:03,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:03,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548281214] [2021-12-17 03:02:03,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548281214] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:03,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:03,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:02:03,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203179675] [2021-12-17 03:02:03,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:03,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:02:03,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:03,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:02:03,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:02:03,258 INFO L87 Difference]: Start difference. First operand 776 states and 955 transitions. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 03:02:06,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:07,668 INFO L93 Difference]: Finished difference Result 797 states and 985 transitions. [2021-12-17 03:02:07,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:02:07,669 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 87 [2021-12-17 03:02:07,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:07,670 INFO L225 Difference]: With dead ends: 797 [2021-12-17 03:02:07,670 INFO L226 Difference]: Without dead ends: 718 [2021-12-17 03:02:07,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:02:07,671 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 436 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 1947 mSolverCounterSat, 177 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1947 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:07,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 2152 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1947 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-17 03:02:07,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-12-17 03:02:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 703. [2021-12-17 03:02:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 588 states have (on average 1.2261904761904763) internal successors, (721), 603 states have internal predecessors, (721), 61 states have call successors, (61), 43 states have call predecessors, (61), 53 states have return successors, (84), 61 states have call predecessors, (84), 56 states have call successors, (84) [2021-12-17 03:02:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 866 transitions. [2021-12-17 03:02:07,712 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 866 transitions. Word has length 87 [2021-12-17 03:02:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:07,712 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 866 transitions. [2021-12-17 03:02:07,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 7 states have internal predecessors, (76), 2 states have call successors, (6), 6 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-17 03:02:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 866 transitions. [2021-12-17 03:02:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 03:02:07,713 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:07,714 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:07,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-12-17 03:02:07,714 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:07,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:07,714 INFO L85 PathProgramCache]: Analyzing trace with hash 985884663, now seen corresponding path program 1 times [2021-12-17 03:02:07,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400664508] [2021-12-17 03:02:07,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:07,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:07,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:07,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:07,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:02:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:07,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:02:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:07,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:02:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:07,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:08,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 03:02:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:08,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400664508] [2021-12-17 03:02:08,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400664508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:08,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:08,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:02:08,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311818593] [2021-12-17 03:02:08,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:08,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:02:08,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:02:08,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:02:08,037 INFO L87 Difference]: Start difference. First operand 703 states and 866 transitions. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 03:02:10,815 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:11,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:11,173 INFO L93 Difference]: Finished difference Result 1075 states and 1342 transitions. [2021-12-17 03:02:11,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:02:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 92 [2021-12-17 03:02:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:11,176 INFO L225 Difference]: With dead ends: 1075 [2021-12-17 03:02:11,176 INFO L226 Difference]: Without dead ends: 718 [2021-12-17 03:02:11,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:02:11,177 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 288 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 146 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 2031 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:11,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 2031 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 910 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 03:02:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-12-17 03:02:11,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 703. [2021-12-17 03:02:11,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 588 states have (on average 1.2244897959183674) internal successors, (720), 603 states have internal predecessors, (720), 61 states have call successors, (61), 43 states have call predecessors, (61), 53 states have return successors, (84), 61 states have call predecessors, (84), 56 states have call successors, (84) [2021-12-17 03:02:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 865 transitions. [2021-12-17 03:02:11,223 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 865 transitions. Word has length 92 [2021-12-17 03:02:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:11,223 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 865 transitions. [2021-12-17 03:02:11,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 5 states have internal predecessors, (74), 2 states have call successors, (10), 8 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 03:02:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 865 transitions. [2021-12-17 03:02:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-17 03:02:11,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:11,224 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:11,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-12-17 03:02:11,224 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:11,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:11,225 INFO L85 PathProgramCache]: Analyzing trace with hash -751551231, now seen corresponding path program 1 times [2021-12-17 03:02:11,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:11,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637653841] [2021-12-17 03:02:11,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:11,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:02:11,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 03:02:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 03:02:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 03:02:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-17 03:02:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:11,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:11,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637653841] [2021-12-17 03:02:11,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637653841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:11,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:11,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:02:11,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819059904] [2021-12-17 03:02:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:11,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:02:11,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:02:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:02:11,472 INFO L87 Difference]: Start difference. First operand 703 states and 865 transitions. Second operand has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 03:02:14,509 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:15,137 INFO L93 Difference]: Finished difference Result 1053 states and 1309 transitions. [2021-12-17 03:02:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 03:02:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 106 [2021-12-17 03:02:15,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:15,140 INFO L225 Difference]: With dead ends: 1053 [2021-12-17 03:02:15,140 INFO L226 Difference]: Without dead ends: 666 [2021-12-17 03:02:15,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2021-12-17 03:02:15,141 INFO L933 BasicCegarLoop]: 401 mSDtfsCounter, 506 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 206 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 2040 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:15,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 2040 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 980 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 03:02:15,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-17 03:02:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 646. [2021-12-17 03:02:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 545 states have (on average 1.2256880733944955) internal successors, (668), 558 states have internal predecessors, (668), 53 states have call successors, (53), 37 states have call predecessors, (53), 47 states have return successors, (65), 55 states have call predecessors, (65), 49 states have call successors, (65) [2021-12-17 03:02:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 786 transitions. [2021-12-17 03:02:15,175 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 786 transitions. Word has length 106 [2021-12-17 03:02:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:15,175 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 786 transitions. [2021-12-17 03:02:15,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.818181818181818) internal successors, (86), 5 states have internal predecessors, (86), 3 states have call successors, (11), 9 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-17 03:02:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 786 transitions. [2021-12-17 03:02:15,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-17 03:02:15,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:15,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:15,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-12-17 03:02:15,177 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:15,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:15,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1717048505, now seen corresponding path program 1 times [2021-12-17 03:02:15,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:15,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435017389] [2021-12-17 03:02:15,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:15,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:15,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:15,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:02:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:02:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:02:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 03:02:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 03:02:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:15,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:15,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435017389] [2021-12-17 03:02:15,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435017389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:15,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:15,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:02:15,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827602055] [2021-12-17 03:02:15,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:15,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:02:15,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:15,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:02:15,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:02:15,479 INFO L87 Difference]: Start difference. First operand 646 states and 786 transitions. Second operand has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:02:18,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:18,820 INFO L93 Difference]: Finished difference Result 774 states and 966 transitions. [2021-12-17 03:02:18,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:02:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 110 [2021-12-17 03:02:18,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:18,825 INFO L225 Difference]: With dead ends: 774 [2021-12-17 03:02:18,825 INFO L226 Difference]: Without dead ends: 711 [2021-12-17 03:02:18,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-12-17 03:02:18,826 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 472 mSDsluCounter, 1978 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 159 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 2303 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:18,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 2303 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1060 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 03:02:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-12-17 03:02:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 668. [2021-12-17 03:02:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 564 states have (on average 1.2163120567375887) internal successors, (686), 575 states have internal predecessors, (686), 56 states have call successors, (56), 37 states have call predecessors, (56), 47 states have return successors, (67), 57 states have call predecessors, (67), 51 states have call successors, (67) [2021-12-17 03:02:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 809 transitions. [2021-12-17 03:02:18,863 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 809 transitions. Word has length 110 [2021-12-17 03:02:18,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:18,863 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 809 transitions. [2021-12-17 03:02:18,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.0) internal successors, (91), 7 states have internal predecessors, (91), 3 states have call successors, (10), 8 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:02:18,863 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 809 transitions. [2021-12-17 03:02:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-17 03:02:18,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:18,864 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:18,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-12-17 03:02:18,865 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:18,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1277151609, now seen corresponding path program 1 times [2021-12-17 03:02:18,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:18,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662530049] [2021-12-17 03:02:18,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:18,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:18,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:19,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:02:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:02:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:02:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:19,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 03:02:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-17 03:02:19,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:19,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-17 03:02:19,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:19,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662530049] [2021-12-17 03:02:19,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662530049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:19,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:19,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-17 03:02:19,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037324279] [2021-12-17 03:02:19,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:19,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 03:02:19,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 03:02:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-12-17 03:02:19,203 INFO L87 Difference]: Start difference. First operand 668 states and 809 transitions. Second operand has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-17 03:02:22,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:22,465 INFO L93 Difference]: Finished difference Result 708 states and 859 transitions. [2021-12-17 03:02:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:02:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) Word has length 117 [2021-12-17 03:02:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:22,467 INFO L225 Difference]: With dead ends: 708 [2021-12-17 03:02:22,467 INFO L226 Difference]: Without dead ends: 603 [2021-12-17 03:02:22,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:02:22,468 INFO L933 BasicCegarLoop]: 304 mSDtfsCounter, 282 mSDsluCounter, 1709 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 139 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 2013 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:22,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 2013 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 888 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 03:02:22,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2021-12-17 03:02:22,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 467. [2021-12-17 03:02:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 392 states have (on average 1.1862244897959184) internal successors, (465), 398 states have internal predecessors, (465), 41 states have call successors, (41), 28 states have call predecessors, (41), 33 states have return successors, (46), 41 states have call predecessors, (46), 38 states have call successors, (46) [2021-12-17 03:02:22,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 552 transitions. [2021-12-17 03:02:22,500 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 552 transitions. Word has length 117 [2021-12-17 03:02:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:22,500 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 552 transitions. [2021-12-17 03:02:22,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.0) internal successors, (84), 5 states have internal predecessors, (84), 2 states have call successors, (11), 8 states have call predecessors, (11), 3 states have return successors, (9), 3 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-17 03:02:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 552 transitions. [2021-12-17 03:02:22,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 03:02:22,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:22,501 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:22,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-12-17 03:02:22,501 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:22,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:22,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1546029661, now seen corresponding path program 1 times [2021-12-17 03:02:22,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:22,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766856257] [2021-12-17 03:02:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:22,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:02:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 03:02:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:02:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 03:02:22,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 03:02:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 03:02:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 03:02:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 03:02:22,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:22,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766856257] [2021-12-17 03:02:22,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766856257] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:22,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:22,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:02:22,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407374565] [2021-12-17 03:02:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:22,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:02:22,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:22,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:02:22,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:02:22,779 INFO L87 Difference]: Start difference. First operand 467 states and 552 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:02:25,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:27,688 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:28,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:28,132 INFO L93 Difference]: Finished difference Result 532 states and 637 transitions. [2021-12-17 03:02:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 03:02:28,133 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-12-17 03:02:28,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:28,134 INFO L225 Difference]: With dead ends: 532 [2021-12-17 03:02:28,134 INFO L226 Difference]: Without dead ends: 506 [2021-12-17 03:02:28,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:02:28,134 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 159 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 55 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:28,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 1233 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-12-17 03:02:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-12-17 03:02:28,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 484. [2021-12-17 03:02:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 408 states have (on average 1.1862745098039216) internal successors, (484), 414 states have internal predecessors, (484), 42 states have call successors, (42), 28 states have call predecessors, (42), 33 states have return successors, (47), 42 states have call predecessors, (47), 39 states have call successors, (47) [2021-12-17 03:02:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 573 transitions. [2021-12-17 03:02:28,166 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 573 transitions. Word has length 116 [2021-12-17 03:02:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:28,166 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 573 transitions. [2021-12-17 03:02:28,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:02:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 573 transitions. [2021-12-17 03:02:28,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 03:02:28,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:28,168 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:28,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-12-17 03:02:28,168 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:28,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1510565347, now seen corresponding path program 1 times [2021-12-17 03:02:28,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461629885] [2021-12-17 03:02:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:28,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:02:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 03:02:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:02:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 03:02:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 03:02:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 03:02:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 03:02:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 03:02:28,405 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:28,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461629885] [2021-12-17 03:02:28,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461629885] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:28,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:28,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 03:02:28,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600599837] [2021-12-17 03:02:28,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:28,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 03:02:28,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 03:02:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 03:02:28,406 INFO L87 Difference]: Start difference. First operand 484 states and 573 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:02:31,002 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:31,269 INFO L93 Difference]: Finished difference Result 530 states and 628 transitions. [2021-12-17 03:02:31,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 03:02:31,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-12-17 03:02:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:31,270 INFO L225 Difference]: With dead ends: 530 [2021-12-17 03:02:31,270 INFO L226 Difference]: Without dead ends: 463 [2021-12-17 03:02:31,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-17 03:02:31,271 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 161 mSDsluCounter, 775 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 76 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:31,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 1075 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 432 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 03:02:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-12-17 03:02:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 446. [2021-12-17 03:02:31,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 374 states have (on average 1.1764705882352942) internal successors, (440), 378 states have internal predecessors, (440), 39 states have call successors, (39), 28 states have call predecessors, (39), 32 states have return successors, (45), 40 states have call predecessors, (45), 38 states have call successors, (45) [2021-12-17 03:02:31,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 524 transitions. [2021-12-17 03:02:31,295 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 524 transitions. Word has length 116 [2021-12-17 03:02:31,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:31,295 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 524 transitions. [2021-12-17 03:02:31,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-17 03:02:31,296 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 524 transitions. [2021-12-17 03:02:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-17 03:02:31,296 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:31,297 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:31,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-12-17 03:02:31,297 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:31,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:31,297 INFO L85 PathProgramCache]: Analyzing trace with hash -813147539, now seen corresponding path program 1 times [2021-12-17 03:02:31,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:31,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801998253] [2021-12-17 03:02:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:31,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:31,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:02:31,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 03:02:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 03:02:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-17 03:02:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 03:02:31,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 03:02:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:31,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:31,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801998253] [2021-12-17 03:02:31,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801998253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:31,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:31,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:02:31,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658778135] [2021-12-17 03:02:31,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:31,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:02:31,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:31,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:02:31,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:02:31,587 INFO L87 Difference]: Start difference. First operand 446 states and 524 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:02:34,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:35,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:35,262 INFO L93 Difference]: Finished difference Result 516 states and 606 transitions. [2021-12-17 03:02:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 03:02:35,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 122 [2021-12-17 03:02:35,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:35,264 INFO L225 Difference]: With dead ends: 516 [2021-12-17 03:02:35,264 INFO L226 Difference]: Without dead ends: 469 [2021-12-17 03:02:35,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-12-17 03:02:35,265 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 504 mSDsluCounter, 1240 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 175 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 1529 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:35,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 1529 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1002 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 03:02:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-12-17 03:02:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 446. [2021-12-17 03:02:35,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 374 states have (on average 1.1764705882352942) internal successors, (440), 378 states have internal predecessors, (440), 39 states have call successors, (39), 28 states have call predecessors, (39), 32 states have return successors, (44), 40 states have call predecessors, (44), 38 states have call successors, (44) [2021-12-17 03:02:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 523 transitions. [2021-12-17 03:02:35,291 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 523 transitions. Word has length 122 [2021-12-17 03:02:35,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:35,292 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 523 transitions. [2021-12-17 03:02:35,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 5 states have internal predecessors, (101), 2 states have call successors, (11), 9 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:02:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 523 transitions. [2021-12-17 03:02:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-17 03:02:35,293 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:35,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:35,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-12-17 03:02:35,293 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:35,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:35,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2088850613, now seen corresponding path program 1 times [2021-12-17 03:02:35,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:35,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786412594] [2021-12-17 03:02:35,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:35,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 03:02:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-17 03:02:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-17 03:02:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:35,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:35,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 03:02:35,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-17 03:02:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-17 03:02:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:35,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:35,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:35,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786412594] [2021-12-17 03:02:35,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786412594] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:35,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:35,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-17 03:02:35,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733285699] [2021-12-17 03:02:35,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:35,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-17 03:02:35,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:35,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-17 03:02:35,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-17 03:02:35,579 INFO L87 Difference]: Start difference. First operand 446 states and 523 transitions. Second operand has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:02:39,043 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:41,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:41,872 INFO L93 Difference]: Finished difference Result 849 states and 1009 transitions. [2021-12-17 03:02:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-17 03:02:41,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 122 [2021-12-17 03:02:41,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:41,875 INFO L225 Difference]: With dead ends: 849 [2021-12-17 03:02:41,875 INFO L226 Difference]: Without dead ends: 776 [2021-12-17 03:02:41,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-12-17 03:02:41,876 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 824 mSDsluCounter, 2071 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 315 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 2545 SdHoareTripleChecker+Invalid, 2089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:41,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 2545 Invalid, 2089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1772 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-12-17 03:02:41,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-12-17 03:02:41,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 332. [2021-12-17 03:02:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 279 states have (on average 1.1612903225806452) internal successors, (324), 281 states have internal predecessors, (324), 27 states have call successors, (27), 23 states have call predecessors, (27), 25 states have return successors, (29), 27 states have call predecessors, (29), 26 states have call successors, (29) [2021-12-17 03:02:41,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 380 transitions. [2021-12-17 03:02:41,897 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 380 transitions. Word has length 122 [2021-12-17 03:02:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:41,897 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 380 transitions. [2021-12-17 03:02:41,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.769230769230769) internal successors, (101), 6 states have internal predecessors, (101), 4 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 03:02:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 380 transitions. [2021-12-17 03:02:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 03:02:41,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:41,898 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:41,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-12-17 03:02:41,898 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:41,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:41,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1025503595, now seen corresponding path program 1 times [2021-12-17 03:02:41,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:41,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044830420] [2021-12-17 03:02:41,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:41,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-17 03:02:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 03:02:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-17 03:02:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-17 03:02:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-17 03:02:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 03:02:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-17 03:02:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-17 03:02:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:42,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-17 03:02:42,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:42,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044830420] [2021-12-17 03:02:42,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044830420] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:42,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:42,284 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:02:42,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464344189] [2021-12-17 03:02:42,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:42,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:02:42,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:42,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:02:42,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:02:42,285 INFO L87 Difference]: Start difference. First operand 332 states and 380 transitions. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:02:45,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:45,384 INFO L93 Difference]: Finished difference Result 369 states and 427 transitions. [2021-12-17 03:02:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 03:02:45,384 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 125 [2021-12-17 03:02:45,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:45,385 INFO L225 Difference]: With dead ends: 369 [2021-12-17 03:02:45,385 INFO L226 Difference]: Without dead ends: 277 [2021-12-17 03:02:45,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-12-17 03:02:45,385 INFO L933 BasicCegarLoop]: 265 mSDtfsCounter, 338 mSDsluCounter, 1381 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 130 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:45,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 1646 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 769 Invalid, 1 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 03:02:45,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-17 03:02:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2021-12-17 03:02:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 222 states have (on average 1.1756756756756757) internal successors, (261), 224 states have internal predecessors, (261), 19 states have call successors, (19), 19 states have call predecessors, (19), 21 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2021-12-17 03:02:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 301 transitions. [2021-12-17 03:02:45,402 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 301 transitions. Word has length 125 [2021-12-17 03:02:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:45,402 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 301 transitions. [2021-12-17 03:02:45,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 6 states have internal predecessors, (93), 3 states have call successors, (11), 6 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:02:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 301 transitions. [2021-12-17 03:02:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-17 03:02:45,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:45,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:45,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-12-17 03:02:45,404 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:45,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:45,404 INFO L85 PathProgramCache]: Analyzing trace with hash 226053049, now seen corresponding path program 1 times [2021-12-17 03:02:45,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:45,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855606081] [2021-12-17 03:02:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:45,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:02:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:02:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:02:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 03:02:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-17 03:02:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-17 03:02:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:45,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:45,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:45,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855606081] [2021-12-17 03:02:45,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855606081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:45,681 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:45,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-17 03:02:45,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631538109] [2021-12-17 03:02:45,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:45,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 03:02:45,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:45,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 03:02:45,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-17 03:02:45,682 INFO L87 Difference]: Start difference. First operand 263 states and 301 transitions. Second operand has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:02:48,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:50,347 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:50,471 INFO L93 Difference]: Finished difference Result 331 states and 379 transitions. [2021-12-17 03:02:50,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 03:02:50,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 131 [2021-12-17 03:02:50,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:50,473 INFO L225 Difference]: With dead ends: 331 [2021-12-17 03:02:50,473 INFO L226 Difference]: Without dead ends: 277 [2021-12-17 03:02:50,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-17 03:02:50,474 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 253 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 91 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:50,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 955 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 376 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 03:02:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-17 03:02:50,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2021-12-17 03:02:50,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 222 states have (on average 1.1711711711711712) internal successors, (260), 224 states have internal predecessors, (260), 19 states have call successors, (19), 19 states have call predecessors, (19), 21 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2021-12-17 03:02:50,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2021-12-17 03:02:50,490 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 131 [2021-12-17 03:02:50,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:50,490 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2021-12-17 03:02:50,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.0) internal successors, (110), 4 states have internal predecessors, (110), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:02:50,490 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2021-12-17 03:02:50,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-17 03:02:50,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:50,491 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:50,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-12-17 03:02:50,491 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:50,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:50,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1225615896, now seen corresponding path program 1 times [2021-12-17 03:02:50,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:50,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869743747] [2021-12-17 03:02:50,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:50,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 03:02:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-17 03:02:50,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 03:02:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-17 03:02:50,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 03:02:50,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-17 03:02:50,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-17 03:02:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-17 03:02:50,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2021-12-17 03:02:50,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 03:02:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 03:02:50,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 03:02:50,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869743747] [2021-12-17 03:02:50,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869743747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 03:02:50,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 03:02:50,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 03:02:50,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114717875] [2021-12-17 03:02:50,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 03:02:50,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 03:02:50,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 03:02:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 03:02:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-12-17 03:02:50,740 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:02:53,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-17 03:02:53,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 03:02:53,504 INFO L93 Difference]: Finished difference Result 368 states and 424 transitions. [2021-12-17 03:02:53,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 03:02:53,504 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 132 [2021-12-17 03:02:53,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 03:02:53,506 INFO L225 Difference]: With dead ends: 368 [2021-12-17 03:02:53,506 INFO L226 Difference]: Without dead ends: 316 [2021-12-17 03:02:53,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-12-17 03:02:53,506 INFO L933 BasicCegarLoop]: 251 mSDtfsCounter, 307 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 96 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 03:02:53,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 953 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 321 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 03:02:53,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-17 03:02:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 261. [2021-12-17 03:02:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 220 states have (on average 1.1681818181818182) internal successors, (257), 222 states have internal predecessors, (257), 19 states have call successors, (19), 19 states have call predecessors, (19), 21 states have return successors, (21), 19 states have call predecessors, (21), 18 states have call successors, (21) [2021-12-17 03:02:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 297 transitions. [2021-12-17 03:02:53,523 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 297 transitions. Word has length 132 [2021-12-17 03:02:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 03:02:53,524 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 297 transitions. [2021-12-17 03:02:53,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.1) internal successors, (111), 3 states have internal predecessors, (111), 2 states have call successors, (11), 9 states have call predecessors, (11), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-17 03:02:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 297 transitions. [2021-12-17 03:02:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-17 03:02:53,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 03:02:53,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 03:02:53,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-12-17 03:02:53,525 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 03:02:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 03:02:53,525 INFO L85 PathProgramCache]: Analyzing trace with hash -271290531, now seen corresponding path program 1 times [2021-12-17 03:02:53,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 03:02:53,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149398492] [2021-12-17 03:02:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 03:02:53,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms Killed by 15