./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 791fd4c1f54f973c646b3f11f7eb2f654eca269cacf7e504443ee0d13fbe9694 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:35:31,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:35:31,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:35:31,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:35:31,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:35:31,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:35:31,676 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:35:31,678 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:35:31,680 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:35:31,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:35:31,684 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:35:31,685 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:35:31,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:35:31,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:35:31,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:35:31,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:35:31,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:35:31,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:35:31,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:35:31,698 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:35:31,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:35:31,700 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:35:31,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:35:31,702 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:35:31,707 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:35:31,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:35:31,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:35:31,709 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:35:31,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:35:31,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:35:31,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:35:31,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:35:31,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:35:31,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:35:31,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:35:31,714 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:35:31,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:35:31,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:35:31,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:35:31,715 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:35:31,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:35:31,717 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:35:31,748 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:35:31,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:35:31,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:35:31,749 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:35:31,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:35:31,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:35:31,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:35:31,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:35:31,750 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:35:31,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:35:31,751 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:35:31,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:35:31,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:35:31,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:35:31,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:35:31,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:35:31,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:35:31,752 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:35:31,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:35:31,752 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:35:31,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:35:31,753 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:35:31,753 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:35:31,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:35:31,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:35:31,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:35:31,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:35:31,754 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:35:31,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:35:31,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:35:31,754 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:35:31,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:35:31,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:35:31,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:35:31,755 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 791fd4c1f54f973c646b3f11f7eb2f654eca269cacf7e504443ee0d13fbe9694 [2021-12-22 08:35:31,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:35:31,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:35:31,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:35:31,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:35:31,971 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:35:31,972 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c [2021-12-22 08:35:32,015 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e14ad521/b315e663ae0b4ae7ae45d912149cf3cc/FLAGcd306fc86 [2021-12-22 08:35:32,485 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:35:32,486 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ntdrivers/kbfiltr.i.cil-2.c [2021-12-22 08:35:32,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e14ad521/b315e663ae0b4ae7ae45d912149cf3cc/FLAGcd306fc86 [2021-12-22 08:35:32,780 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e14ad521/b315e663ae0b4ae7ae45d912149cf3cc [2021-12-22 08:35:32,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:35:32,784 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:35:32,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:35:32,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:35:32,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:35:32,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:32" (1/1) ... [2021-12-22 08:35:32,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@272ed78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:32, skipping insertion in model container [2021-12-22 08:35:32,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:35:32" (1/1) ... [2021-12-22 08:35:32,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:35:32,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:35:33,157 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/kbfiltr.i.cil-2.c[62209,62222] [2021-12-22 08:35:33,337 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:35:33,345 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:35:33,394 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/kbfiltr.i.cil-2.c[62209,62222] [2021-12-22 08:35:33,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:35:33,510 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:35:33,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33 WrapperNode [2021-12-22 08:35:33,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:35:33,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:35:33,511 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:35:33,511 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:35:33,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,617 INFO L137 Inliner]: procedures = 109, calls = 328, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 1084 [2021-12-22 08:35:33,617 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:35:33,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:35:33,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:35:33,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:35:33,623 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,705 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,718 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:35:33,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:35:33,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:35:33,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:35:33,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (1/1) ... [2021-12-22 08:35:33,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:35:33,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:35:33,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 08:35:33,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 08:35:33,783 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_Complete [2021-12-22 08:35:33,783 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_Complete [2021-12-22 08:35:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 08:35:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 08:35:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 08:35:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 08:35:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure errorFn [2021-12-22 08:35:33,784 INFO L138 BoogieDeclarations]: Found implementation of procedure errorFn [2021-12-22 08:35:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 08:35:33,784 INFO L130 BoogieDeclarations]: Found specification of procedure IofCompleteRequest [2021-12-22 08:35:33,784 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCompleteRequest [2021-12-22 08:35:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure IofCallDriver [2021-12-22 08:35:33,785 INFO L138 BoogieDeclarations]: Found implementation of procedure IofCallDriver [2021-12-22 08:35:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 08:35:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:35:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 08:35:33,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 08:35:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure stubMoreProcessingRequired [2021-12-22 08:35:33,786 INFO L138 BoogieDeclarations]: Found implementation of procedure stubMoreProcessingRequired [2021-12-22 08:35:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_CreateClose [2021-12-22 08:35:33,786 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_CreateClose [2021-12-22 08:35:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 08:35:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 08:35:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:35:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 08:35:33,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:35:33,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:35:33,787 INFO L130 BoogieDeclarations]: Found specification of procedure KbFilter_DispatchPassThrough [2021-12-22 08:35:33,787 INFO L138 BoogieDeclarations]: Found implementation of procedure KbFilter_DispatchPassThrough [2021-12-22 08:35:34,017 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:35:34,018 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:35:34,094 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:34,132 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##12: assume !false; [2021-12-22 08:35:34,132 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume false; [2021-12-22 08:35:34,194 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:34,196 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:34,197 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:34,200 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:34,202 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:34,205 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:34,206 WARN L813 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-12-22 08:35:35,694 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##83: assume false; [2021-12-22 08:35:35,694 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##84: assume !false; [2021-12-22 08:35:35,694 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##36: assume !false; [2021-12-22 08:35:35,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##35: assume false; [2021-12-22 08:35:35,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##139: assume false; [2021-12-22 08:35:35,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##140: assume !false; [2021-12-22 08:35:35,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##20: assume !false; [2021-12-22 08:35:35,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##19: assume false; [2021-12-22 08:35:35,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume false; [2021-12-22 08:35:35,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##157: assume !false; [2021-12-22 08:35:35,695 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##11: assume !false; [2021-12-22 08:35:35,696 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##156: assume false; [2021-12-22 08:35:35,696 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##114: assume !false; [2021-12-22 08:35:35,696 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##113: assume false; [2021-12-22 08:35:35,716 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:35:35,723 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:35:35,725 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 08:35:35,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:35:35 BoogieIcfgContainer [2021-12-22 08:35:35,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:35:35,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:35:35,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:35:35,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:35:35,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:35:32" (1/3) ... [2021-12-22 08:35:35,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722d57db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:35:35, skipping insertion in model container [2021-12-22 08:35:35,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:35:33" (2/3) ... [2021-12-22 08:35:35,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@722d57db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:35:35, skipping insertion in model container [2021-12-22 08:35:35,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:35:35" (3/3) ... [2021-12-22 08:35:35,734 INFO L111 eAbstractionObserver]: Analyzing ICFG kbfiltr.i.cil-2.c [2021-12-22 08:35:35,738 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:35:35,739 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:35:35,770 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:35:35,775 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:35:35,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:35:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 239 states, 201 states have (on average 1.572139303482587) internal successors, (316), 219 states have internal predecessors, (316), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-22 08:35:35,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 08:35:35,803 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:35,803 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:35,804 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:35,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:35,808 INFO L85 PathProgramCache]: Analyzing trace with hash -660511979, now seen corresponding path program 1 times [2021-12-22 08:35:35,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:35,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261357274] [2021-12-22 08:35:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:35,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:36,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:36,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261357274] [2021-12-22 08:35:36,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261357274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:36,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:36,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 08:35:36,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084710397] [2021-12-22 08:35:36,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:36,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 08:35:36,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:36,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 08:35:36,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:35:36,203 INFO L87 Difference]: Start difference. First operand has 239 states, 201 states have (on average 1.572139303482587) internal successors, (316), 219 states have internal predecessors, (316), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:36,270 INFO L93 Difference]: Finished difference Result 472 states and 755 transitions. [2021-12-22 08:35:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 08:35:36,272 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 08:35:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:36,284 INFO L225 Difference]: With dead ends: 472 [2021-12-22 08:35:36,284 INFO L226 Difference]: Without dead ends: 231 [2021-12-22 08:35:36,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 08:35:36,294 INFO L933 BasicCegarLoop]: 355 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:36,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-22 08:35:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-12-22 08:35:36,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.5128205128205128) internal successors, (295), 211 states have internal predecessors, (295), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 08:35:36,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 339 transitions. [2021-12-22 08:35:36,371 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 339 transitions. Word has length 16 [2021-12-22 08:35:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:36,372 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 339 transitions. [2021-12-22 08:35:36,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 339 transitions. [2021-12-22 08:35:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 08:35:36,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:36,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:36,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:35:36,378 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:36,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1247317993, now seen corresponding path program 1 times [2021-12-22 08:35:36,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:36,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857334947] [2021-12-22 08:35:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:36,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:36,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:36,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:36,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857334947] [2021-12-22 08:35:36,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857334947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:36,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:36,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:36,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129364624] [2021-12-22 08:35:36,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:36,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:36,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:36,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:36,579 INFO L87 Difference]: Start difference. First operand 231 states and 339 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:38,597 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 [] [2021-12-22 08:35:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:38,665 INFO L93 Difference]: Finished difference Result 248 states and 360 transitions. [2021-12-22 08:35:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:38,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-22 08:35:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:38,666 INFO L225 Difference]: With dead ends: 248 [2021-12-22 08:35:38,667 INFO L226 Difference]: Without dead ends: 231 [2021-12-22 08:35:38,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:38,668 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 249 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:38,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 737 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 08:35:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-12-22 08:35:38,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-12-22 08:35:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 195 states have (on average 1.5076923076923077) internal successors, (294), 211 states have internal predecessors, (294), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 08:35:38,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 338 transitions. [2021-12-22 08:35:38,677 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 338 transitions. Word has length 16 [2021-12-22 08:35:38,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:38,677 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 338 transitions. [2021-12-22 08:35:38,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 338 transitions. [2021-12-22 08:35:38,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:35:38,678 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:38,678 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:38,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:35:38,679 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:38,679 INFO L85 PathProgramCache]: Analyzing trace with hash 8900389, now seen corresponding path program 1 times [2021-12-22 08:35:38,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:38,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724928164] [2021-12-22 08:35:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:38,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:38,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:38,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724928164] [2021-12-22 08:35:38,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724928164] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:38,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:38,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:38,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092892657] [2021-12-22 08:35:38,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:38,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:38,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:38,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:38,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:38,855 INFO L87 Difference]: Start difference. First operand 231 states and 338 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:39,973 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:40,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:40,159 INFO L93 Difference]: Finished difference Result 603 states and 904 transitions. [2021-12-22 08:35:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:40,160 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-22 08:35:40,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:40,162 INFO L225 Difference]: With dead ends: 603 [2021-12-22 08:35:40,163 INFO L226 Difference]: Without dead ends: 392 [2021-12-22 08:35:40,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:40,167 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 442 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:40,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 1254 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 08:35:40,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-22 08:35:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 233. [2021-12-22 08:35:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 197 states have (on average 1.50253807106599) internal successors, (296), 213 states have internal predecessors, (296), 29 states have call successors, (29), 7 states have call predecessors, (29), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-12-22 08:35:40,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 340 transitions. [2021-12-22 08:35:40,200 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 340 transitions. Word has length 28 [2021-12-22 08:35:40,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:40,200 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 340 transitions. [2021-12-22 08:35:40,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 340 transitions. [2021-12-22 08:35:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 08:35:40,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:40,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:40,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 08:35:40,206 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:40,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:40,206 INFO L85 PathProgramCache]: Analyzing trace with hash 620779237, now seen corresponding path program 1 times [2021-12-22 08:35:40,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:40,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122477217] [2021-12-22 08:35:40,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:40,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:40,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:40,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122477217] [2021-12-22 08:35:40,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122477217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:40,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:40,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:40,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592031931] [2021-12-22 08:35:40,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:40,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:40,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:40,339 INFO L87 Difference]: Start difference. First operand 233 states and 340 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:40,999 INFO L93 Difference]: Finished difference Result 354 states and 506 transitions. [2021-12-22 08:35:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-22 08:35:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:41,002 INFO L225 Difference]: With dead ends: 354 [2021-12-22 08:35:41,002 INFO L226 Difference]: Without dead ends: 299 [2021-12-22 08:35:41,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:41,010 INFO L933 BasicCegarLoop]: 366 mSDtfsCounter, 244 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:41,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 477 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 08:35:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-12-22 08:35:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 283. [2021-12-22 08:35:41,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 246 states have (on average 1.4308943089430894) internal successors, (352), 249 states have internal predecessors, (352), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (27), 25 states have call predecessors, (27), 18 states have call successors, (27) [2021-12-22 08:35:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 405 transitions. [2021-12-22 08:35:41,027 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 405 transitions. Word has length 28 [2021-12-22 08:35:41,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:41,028 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 405 transitions. [2021-12-22 08:35:41,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 405 transitions. [2021-12-22 08:35:41,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 08:35:41,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:41,030 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:41,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 08:35:41,030 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:41,031 INFO L85 PathProgramCache]: Analyzing trace with hash -451775854, now seen corresponding path program 1 times [2021-12-22 08:35:41,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:41,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384853825] [2021-12-22 08:35:41,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:41,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:41,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:41,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384853825] [2021-12-22 08:35:41,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384853825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:41,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:41,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:41,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195703838] [2021-12-22 08:35:41,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:41,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:41,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:41,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:41,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:41,173 INFO L87 Difference]: Start difference. First operand 283 states and 405 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:41,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:41,197 INFO L93 Difference]: Finished difference Result 439 states and 613 transitions. [2021-12-22 08:35:41,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:41,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-12-22 08:35:41,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:41,200 INFO L225 Difference]: With dead ends: 439 [2021-12-22 08:35:41,200 INFO L226 Difference]: Without dead ends: 340 [2021-12-22 08:35:41,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:41,201 INFO L933 BasicCegarLoop]: 338 mSDtfsCounter, 281 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:41,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 426 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:41,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-22 08:35:41,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 317. [2021-12-22 08:35:41,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 282 states have (on average 1.425531914893617) internal successors, (402), 283 states have internal predecessors, (402), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2021-12-22 08:35:41,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 450 transitions. [2021-12-22 08:35:41,211 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 450 transitions. Word has length 30 [2021-12-22 08:35:41,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:41,212 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 450 transitions. [2021-12-22 08:35:41,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:41,212 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 450 transitions. [2021-12-22 08:35:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-22 08:35:41,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:41,213 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:41,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 08:35:41,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:41,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:41,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1294247663, now seen corresponding path program 1 times [2021-12-22 08:35:41,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:41,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992403286] [2021-12-22 08:35:41,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:41,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:41,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:41,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992403286] [2021-12-22 08:35:41,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992403286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:41,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:41,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:41,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99575389] [2021-12-22 08:35:41,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:41,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:41,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:41,381 INFO L87 Difference]: Start difference. First operand 317 states and 450 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:43,395 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 [] [2021-12-22 08:35:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:43,539 INFO L93 Difference]: Finished difference Result 341 states and 477 transitions. [2021-12-22 08:35:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-22 08:35:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:43,541 INFO L225 Difference]: With dead ends: 341 [2021-12-22 08:35:43,541 INFO L226 Difference]: Without dead ends: 333 [2021-12-22 08:35:43,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:43,541 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 526 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 46 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:43,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 400 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 107 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 08:35:43,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-22 08:35:43,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 322. [2021-12-22 08:35:43,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 287 states have (on average 1.421602787456446) internal successors, (408), 288 states have internal predecessors, (408), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2021-12-22 08:35:43,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 456 transitions. [2021-12-22 08:35:43,551 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 456 transitions. Word has length 32 [2021-12-22 08:35:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:43,551 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 456 transitions. [2021-12-22 08:35:43,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 456 transitions. [2021-12-22 08:35:43,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-22 08:35:43,552 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:43,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:43,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 08:35:43,553 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:43,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1059548875, now seen corresponding path program 1 times [2021-12-22 08:35:43,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:43,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019358442] [2021-12-22 08:35:43,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:43,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:43,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:43,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019358442] [2021-12-22 08:35:43,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019358442] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:43,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:43,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:43,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69721926] [2021-12-22 08:35:43,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:43,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:43,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:43,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:43,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:43,733 INFO L87 Difference]: Start difference. First operand 322 states and 456 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:44,763 INFO L93 Difference]: Finished difference Result 341 states and 476 transitions. [2021-12-22 08:35:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:44,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-22 08:35:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:44,765 INFO L225 Difference]: With dead ends: 341 [2021-12-22 08:35:44,765 INFO L226 Difference]: Without dead ends: 333 [2021-12-22 08:35:44,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:44,766 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 523 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:44,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 403 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 08:35:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-12-22 08:35:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 323. [2021-12-22 08:35:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 288 states have (on average 1.4201388888888888) internal successors, (409), 289 states have internal predecessors, (409), 22 states have call successors, (22), 11 states have call predecessors, (22), 12 states have return successors, (26), 23 states have call predecessors, (26), 16 states have call successors, (26) [2021-12-22 08:35:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 457 transitions. [2021-12-22 08:35:44,776 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 457 transitions. Word has length 33 [2021-12-22 08:35:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:44,776 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 457 transitions. [2021-12-22 08:35:44,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 457 transitions. [2021-12-22 08:35:44,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 08:35:44,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:44,778 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:44,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 08:35:44,778 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:44,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1752141914, now seen corresponding path program 1 times [2021-12-22 08:35:44,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:44,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222205869] [2021-12-22 08:35:44,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:44,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:44,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:44,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:44,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222205869] [2021-12-22 08:35:44,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222205869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:44,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:44,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:44,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033703989] [2021-12-22 08:35:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:44,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:44,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:44,904 INFO L87 Difference]: Start difference. First operand 323 states and 457 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:45,054 INFO L93 Difference]: Finished difference Result 335 states and 468 transitions. [2021-12-22 08:35:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:45,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-22 08:35:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:45,055 INFO L225 Difference]: With dead ends: 335 [2021-12-22 08:35:45,056 INFO L226 Difference]: Without dead ends: 293 [2021-12-22 08:35:45,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:45,057 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 513 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:45,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 401 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:35:45,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-12-22 08:35:45,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 290. [2021-12-22 08:35:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 258 states have (on average 1.441860465116279) internal successors, (372), 264 states have internal predecessors, (372), 22 states have call successors, (22), 11 states have call predecessors, (22), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-22 08:35:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 412 transitions. [2021-12-22 08:35:45,068 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 412 transitions. Word has length 34 [2021-12-22 08:35:45,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:45,068 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 412 transitions. [2021-12-22 08:35:45,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:45,069 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 412 transitions. [2021-12-22 08:35:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 08:35:45,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:45,070 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:45,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 08:35:45,070 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:45,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:45,083 INFO L85 PathProgramCache]: Analyzing trace with hash 350835753, now seen corresponding path program 1 times [2021-12-22 08:35:45,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:45,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230337081] [2021-12-22 08:35:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:45,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:45,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:45,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:45,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230337081] [2021-12-22 08:35:45,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230337081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:45,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:45,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:45,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115762327] [2021-12-22 08:35:45,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:45,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:45,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:45,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:45,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:45,192 INFO L87 Difference]: Start difference. First operand 290 states and 412 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:47,042 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:47,104 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2021-12-22 08:35:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:47,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-22 08:35:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:47,106 INFO L225 Difference]: With dead ends: 293 [2021-12-22 08:35:47,106 INFO L226 Difference]: Without dead ends: 289 [2021-12-22 08:35:47,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:47,107 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 26 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:47,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 535 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 08:35:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-22 08:35:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2021-12-22 08:35:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 258 states have (on average 1.434108527131783) internal successors, (370), 263 states have internal predecessors, (370), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-22 08:35:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 409 transitions. [2021-12-22 08:35:47,117 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 409 transitions. Word has length 34 [2021-12-22 08:35:47,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:47,117 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 409 transitions. [2021-12-22 08:35:47,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 409 transitions. [2021-12-22 08:35:47,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 08:35:47,118 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:47,118 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:47,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 08:35:47,119 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:47,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:47,119 INFO L85 PathProgramCache]: Analyzing trace with hash 407921745, now seen corresponding path program 1 times [2021-12-22 08:35:47,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:47,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493378163] [2021-12-22 08:35:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:47,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:47,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:47,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493378163] [2021-12-22 08:35:47,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493378163] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:47,235 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:47,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:47,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861868350] [2021-12-22 08:35:47,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:47,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:47,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:47,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:47,237 INFO L87 Difference]: Start difference. First operand 289 states and 409 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:47,345 INFO L93 Difference]: Finished difference Result 343 states and 476 transitions. [2021-12-22 08:35:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:47,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-22 08:35:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:47,347 INFO L225 Difference]: With dead ends: 343 [2021-12-22 08:35:47,347 INFO L226 Difference]: Without dead ends: 304 [2021-12-22 08:35:47,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:47,348 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 325 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:47,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 498 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:35:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-12-22 08:35:47,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 289. [2021-12-22 08:35:47,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 258 states have (on average 1.426356589147287) internal successors, (368), 263 states have internal predecessors, (368), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-22 08:35:47,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 407 transitions. [2021-12-22 08:35:47,358 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 407 transitions. Word has length 43 [2021-12-22 08:35:47,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:47,359 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 407 transitions. [2021-12-22 08:35:47,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:47,359 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 407 transitions. [2021-12-22 08:35:47,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 08:35:47,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:47,360 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:47,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 08:35:47,360 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:47,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:47,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1067937794, now seen corresponding path program 1 times [2021-12-22 08:35:47,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:47,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792602781] [2021-12-22 08:35:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:47,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:47,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:35:47,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:47,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:47,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792602781] [2021-12-22 08:35:47,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792602781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:47,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:47,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:35:47,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399033543] [2021-12-22 08:35:47,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:47,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:35:47,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:47,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:35:47,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:35:47,564 INFO L87 Difference]: Start difference. First operand 289 states and 407 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:35:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:48,878 INFO L93 Difference]: Finished difference Result 316 states and 439 transitions. [2021-12-22 08:35:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:35:48,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-12-22 08:35:48,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:48,880 INFO L225 Difference]: With dead ends: 316 [2021-12-22 08:35:48,880 INFO L226 Difference]: Without dead ends: 308 [2021-12-22 08:35:48,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:35:48,881 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 371 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:48,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 727 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 08:35:48,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-22 08:35:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 300. [2021-12-22 08:35:48,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 269 states have (on average 1.420074349442379) internal successors, (382), 273 states have internal predecessors, (382), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-22 08:35:48,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 421 transitions. [2021-12-22 08:35:48,899 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 421 transitions. Word has length 44 [2021-12-22 08:35:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:48,899 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 421 transitions. [2021-12-22 08:35:48,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:35:48,900 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 421 transitions. [2021-12-22 08:35:48,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 08:35:48,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:48,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:48,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 08:35:48,902 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:48,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:48,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1661089768, now seen corresponding path program 1 times [2021-12-22 08:35:48,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:48,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87757334] [2021-12-22 08:35:48,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:48,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:49,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:35:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:49,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:49,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87757334] [2021-12-22 08:35:49,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87757334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:49,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:49,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:35:49,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567951627] [2021-12-22 08:35:49,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:49,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:35:49,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:49,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:35:49,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:35:49,104 INFO L87 Difference]: Start difference. First operand 300 states and 421 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:35:50,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:51,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:51,894 INFO L93 Difference]: Finished difference Result 316 states and 438 transitions. [2021-12-22 08:35:51,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:35:51,895 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-22 08:35:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:51,896 INFO L225 Difference]: With dead ends: 316 [2021-12-22 08:35:51,896 INFO L226 Difference]: Without dead ends: 308 [2021-12-22 08:35:51,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:35:51,897 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 367 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:51,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 729 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-22 08:35:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-12-22 08:35:51,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 301. [2021-12-22 08:35:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 270 states have (on average 1.4185185185185185) internal successors, (383), 274 states have internal predecessors, (383), 21 states have call successors, (21), 11 states have call predecessors, (21), 9 states have return successors, (18), 15 states have call predecessors, (18), 16 states have call successors, (18) [2021-12-22 08:35:51,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 422 transitions. [2021-12-22 08:35:51,909 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 422 transitions. Word has length 45 [2021-12-22 08:35:51,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:51,909 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 422 transitions. [2021-12-22 08:35:51,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 5 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:35:51,910 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 422 transitions. [2021-12-22 08:35:51,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 08:35:51,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:51,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:51,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 08:35:51,911 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:51,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:51,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1877198546, now seen corresponding path program 1 times [2021-12-22 08:35:51,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:51,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098585997] [2021-12-22 08:35:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:51,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:52,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:35:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:52,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:52,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098585997] [2021-12-22 08:35:52,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098585997] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:52,020 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:52,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:35:52,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491494268] [2021-12-22 08:35:52,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:52,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:35:52,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:52,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:35:52,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:52,021 INFO L87 Difference]: Start difference. First operand 301 states and 422 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:35:53,352 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:55,369 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:55,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:55,546 INFO L93 Difference]: Finished difference Result 348 states and 473 transitions. [2021-12-22 08:35:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:35:55,546 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-12-22 08:35:55,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:55,548 INFO L225 Difference]: With dead ends: 348 [2021-12-22 08:35:55,548 INFO L226 Difference]: Without dead ends: 289 [2021-12-22 08:35:55,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:35:55,548 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 362 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:55,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 844 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 130 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-12-22 08:35:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-22 08:35:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 271. [2021-12-22 08:35:55,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 242 states have (on average 1.4049586776859504) internal successors, (340), 246 states have internal predecessors, (340), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-12-22 08:35:55,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 374 transitions. [2021-12-22 08:35:55,560 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 374 transitions. Word has length 45 [2021-12-22 08:35:55,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:55,560 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 374 transitions. [2021-12-22 08:35:55,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:35:55,560 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 374 transitions. [2021-12-22 08:35:55,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 08:35:55,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:55,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:55,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 08:35:55,561 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:55,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash 859522540, now seen corresponding path program 1 times [2021-12-22 08:35:55,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:55,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441457990] [2021-12-22 08:35:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:55,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:55,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:55,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441457990] [2021-12-22 08:35:55,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441457990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:55,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:55,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:35:55,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912094085] [2021-12-22 08:35:55,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:55,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:35:55,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:55,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:35:55,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:35:55,714 INFO L87 Difference]: Start difference. First operand 271 states and 374 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:56,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:56,389 INFO L93 Difference]: Finished difference Result 310 states and 423 transitions. [2021-12-22 08:35:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:35:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-22 08:35:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:56,391 INFO L225 Difference]: With dead ends: 310 [2021-12-22 08:35:56,391 INFO L226 Difference]: Without dead ends: 269 [2021-12-22 08:35:56,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:35:56,393 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 303 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:56,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 500 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 08:35:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-12-22 08:35:56,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2021-12-22 08:35:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 240 states have (on average 1.4) internal successors, (336), 244 states have internal predecessors, (336), 19 states have call successors, (19), 10 states have call predecessors, (19), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-12-22 08:35:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 370 transitions. [2021-12-22 08:35:56,408 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 370 transitions. Word has length 45 [2021-12-22 08:35:56,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:56,409 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 370 transitions. [2021-12-22 08:35:56,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:56,409 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 370 transitions. [2021-12-22 08:35:56,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 08:35:56,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:56,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:56,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 08:35:56,410 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:56,411 INFO L85 PathProgramCache]: Analyzing trace with hash 285533420, now seen corresponding path program 1 times [2021-12-22 08:35:56,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:56,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698545796] [2021-12-22 08:35:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:56,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:56,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:56,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698545796] [2021-12-22 08:35:56,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698545796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:56,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:56,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:35:56,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982380277] [2021-12-22 08:35:56,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:56,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:35:56,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:35:56,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:56,513 INFO L87 Difference]: Start difference. First operand 269 states and 370 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:56,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:56,534 INFO L93 Difference]: Finished difference Result 286 states and 391 transitions. [2021-12-22 08:35:56,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:35:56,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-12-22 08:35:56,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:56,536 INFO L225 Difference]: With dead ends: 286 [2021-12-22 08:35:56,536 INFO L226 Difference]: Without dead ends: 263 [2021-12-22 08:35:56,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:35:56,538 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 285 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:56,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:35:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-12-22 08:35:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2021-12-22 08:35:56,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 235 states have (on average 1.3872340425531915) internal successors, (326), 238 states have internal predecessors, (326), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-12-22 08:35:56,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 359 transitions. [2021-12-22 08:35:56,552 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 359 transitions. Word has length 45 [2021-12-22 08:35:56,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:56,552 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 359 transitions. [2021-12-22 08:35:56,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:56,552 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 359 transitions. [2021-12-22 08:35:56,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-22 08:35:56,553 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:56,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:56,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 08:35:56,553 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:56,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:56,554 INFO L85 PathProgramCache]: Analyzing trace with hash 270131950, now seen corresponding path program 1 times [2021-12-22 08:35:56,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:56,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003843551] [2021-12-22 08:35:56,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:56,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:56,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:56,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:56,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003843551] [2021-12-22 08:35:56,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003843551] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:56,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:56,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:35:56,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350097405] [2021-12-22 08:35:56,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:56,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:35:56,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:56,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:35:56,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:35:56,654 INFO L87 Difference]: Start difference. First operand 263 states and 359 transitions. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:58,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:35:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:35:58,709 INFO L93 Difference]: Finished difference Result 283 states and 381 transitions. [2021-12-22 08:35:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:35:58,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-12-22 08:35:58,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:35:58,711 INFO L225 Difference]: With dead ends: 283 [2021-12-22 08:35:58,711 INFO L226 Difference]: Without dead ends: 262 [2021-12-22 08:35:58,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:35:58,712 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 50 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:35:58,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1444 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 08:35:58,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-12-22 08:35:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2021-12-22 08:35:58,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 234 states have (on average 1.3846153846153846) internal successors, (324), 237 states have internal predecessors, (324), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-12-22 08:35:58,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 357 transitions. [2021-12-22 08:35:58,722 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 357 transitions. Word has length 46 [2021-12-22 08:35:58,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:35:58,723 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 357 transitions. [2021-12-22 08:35:58,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:35:58,723 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 357 transitions. [2021-12-22 08:35:58,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 08:35:58,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:35:58,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:35:58,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 08:35:58,724 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:35:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:35:58,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1666913919, now seen corresponding path program 1 times [2021-12-22 08:35:58,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:35:58,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572314224] [2021-12-22 08:35:58,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:35:58,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:35:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:58,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 08:35:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:35:58,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:35:58,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:35:58,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572314224] [2021-12-22 08:35:58,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572314224] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:35:58,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:35:58,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:35:58,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128312305] [2021-12-22 08:35:58,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:35:58,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:35:58,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:35:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:35:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:35:58,832 INFO L87 Difference]: Start difference. First operand 262 states and 357 transitions. Second operand has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:36:00,541 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:01,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:01,597 INFO L93 Difference]: Finished difference Result 314 states and 416 transitions. [2021-12-22 08:36:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:36:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-12-22 08:36:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:01,599 INFO L225 Difference]: With dead ends: 314 [2021-12-22 08:36:01,599 INFO L226 Difference]: Without dead ends: 261 [2021-12-22 08:36:01,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:36:01,600 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 65 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:01,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1297 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 08:36:01,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-12-22 08:36:01,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2021-12-22 08:36:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 233 states have (on average 1.3690987124463518) internal successors, (319), 236 states have internal predecessors, (319), 18 states have call successors, (18), 10 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2021-12-22 08:36:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 352 transitions. [2021-12-22 08:36:01,612 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 352 transitions. Word has length 47 [2021-12-22 08:36:01,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:01,612 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 352 transitions. [2021-12-22 08:36:01,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.333333333333333) internal successors, (44), 5 states have internal predecessors, (44), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:36:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 352 transitions. [2021-12-22 08:36:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 08:36:01,613 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:01,613 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:01,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 08:36:01,614 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:01,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:01,614 INFO L85 PathProgramCache]: Analyzing trace with hash 110253154, now seen corresponding path program 1 times [2021-12-22 08:36:01,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:01,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025301015] [2021-12-22 08:36:01,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:01,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:01,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:01,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025301015] [2021-12-22 08:36:01,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025301015] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:01,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:01,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:36:01,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485191717] [2021-12-22 08:36:01,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:01,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:36:01,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:36:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:36:01,737 INFO L87 Difference]: Start difference. First operand 261 states and 352 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:01,871 INFO L93 Difference]: Finished difference Result 293 states and 392 transitions. [2021-12-22 08:36:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:36:01,872 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-12-22 08:36:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:01,873 INFO L225 Difference]: With dead ends: 293 [2021-12-22 08:36:01,873 INFO L226 Difference]: Without dead ends: 179 [2021-12-22 08:36:01,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:36:01,874 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 298 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:01,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 511 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:36:01,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-22 08:36:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 156. [2021-12-22 08:36:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 139 states have (on average 1.3237410071942446) internal successors, (184), 142 states have internal predecessors, (184), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2021-12-22 08:36:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 201 transitions. [2021-12-22 08:36:01,883 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 201 transitions. Word has length 47 [2021-12-22 08:36:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:01,883 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 201 transitions. [2021-12-22 08:36:01,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 08:36:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 201 transitions. [2021-12-22 08:36:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 08:36:01,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:01,884 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:01,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 08:36:01,884 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:01,885 INFO L85 PathProgramCache]: Analyzing trace with hash 2127433471, now seen corresponding path program 1 times [2021-12-22 08:36:01,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:01,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998603278] [2021-12-22 08:36:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:01,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:01,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 08:36:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:01,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:01,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998603278] [2021-12-22 08:36:01,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998603278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:01,973 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:01,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:36:01,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903387525] [2021-12-22 08:36:01,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:01,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:36:01,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:01,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:36:01,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:36:01,976 INFO L87 Difference]: Start difference. First operand 156 states and 201 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:36:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:02,449 INFO L93 Difference]: Finished difference Result 170 states and 215 transitions. [2021-12-22 08:36:02,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:36:02,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-12-22 08:36:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:02,450 INFO L225 Difference]: With dead ends: 170 [2021-12-22 08:36:02,450 INFO L226 Difference]: Without dead ends: 126 [2021-12-22 08:36:02,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:36:02,451 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 42 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:02,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 374 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 08:36:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-22 08:36:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-12-22 08:36:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 111 states have (on average 1.3063063063063063) internal successors, (145), 114 states have internal predecessors, (145), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-22 08:36:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 160 transitions. [2021-12-22 08:36:02,457 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 160 transitions. Word has length 48 [2021-12-22 08:36:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:02,458 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 160 transitions. [2021-12-22 08:36:02,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 08:36:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 160 transitions. [2021-12-22 08:36:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 08:36:02,458 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:02,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:02,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 08:36:02,458 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:02,459 INFO L85 PathProgramCache]: Analyzing trace with hash 752958033, now seen corresponding path program 1 times [2021-12-22 08:36:02,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:02,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118329662] [2021-12-22 08:36:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:02,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:02,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 08:36:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:02,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 08:36:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:02,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:02,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:02,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118329662] [2021-12-22 08:36:02,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118329662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:02,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:02,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:36:02,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273218016] [2021-12-22 08:36:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:02,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:36:02,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:36:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:36:02,557 INFO L87 Difference]: Start difference. First operand 126 states and 160 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 08:36:04,564 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:05,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:07,841 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 [] [2021-12-22 08:36:07,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:07,925 INFO L93 Difference]: Finished difference Result 175 states and 222 transitions. [2021-12-22 08:36:07,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:36:07,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2021-12-22 08:36:07,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:07,926 INFO L225 Difference]: With dead ends: 175 [2021-12-22 08:36:07,926 INFO L226 Difference]: Without dead ends: 124 [2021-12-22 08:36:07,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:36:07,927 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 31 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:07,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 367 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 80 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2021-12-22 08:36:07,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-22 08:36:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-22 08:36:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 110 states have (on average 1.290909090909091) internal successors, (142), 112 states have internal predecessors, (142), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-22 08:36:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2021-12-22 08:36:07,935 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 50 [2021-12-22 08:36:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:07,935 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2021-12-22 08:36:07,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 3 states have internal predecessors, (44), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 08:36:07,936 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2021-12-22 08:36:07,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 08:36:07,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:07,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:07,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 08:36:07,938 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:07,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1478509685, now seen corresponding path program 1 times [2021-12-22 08:36:07,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:07,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3383793] [2021-12-22 08:36:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:07,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:08,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:36:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:08,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:08,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:08,097 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:08,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3383793] [2021-12-22 08:36:08,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3383793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:08,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:08,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 08:36:08,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775593706] [2021-12-22 08:36:08,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:08,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 08:36:08,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:08,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 08:36:08,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:36:08,099 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 08:36:09,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:09,322 INFO L93 Difference]: Finished difference Result 213 states and 273 transitions. [2021-12-22 08:36:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:36:09,323 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 52 [2021-12-22 08:36:09,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:09,323 INFO L225 Difference]: With dead ends: 213 [2021-12-22 08:36:09,323 INFO L226 Difference]: Without dead ends: 160 [2021-12-22 08:36:09,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:36:09,324 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 46 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:09,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 583 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 08:36:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-22 08:36:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2021-12-22 08:36:09,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 124 states have (on average 1.2661290322580645) internal successors, (157), 126 states have internal predecessors, (157), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 08:36:09,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions. [2021-12-22 08:36:09,332 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 52 [2021-12-22 08:36:09,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:09,332 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 173 transitions. [2021-12-22 08:36:09,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 08:36:09,333 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions. [2021-12-22 08:36:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 08:36:09,333 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:09,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:09,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 08:36:09,334 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:09,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:09,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2078113571, now seen corresponding path program 1 times [2021-12-22 08:36:09,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:09,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61007102] [2021-12-22 08:36:09,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:09,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:09,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:36:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:09,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:09,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:09,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61007102] [2021-12-22 08:36:09,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61007102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:09,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:09,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:36:09,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331564618] [2021-12-22 08:36:09,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:09,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:36:09,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:09,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:36:09,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:36:09,460 INFO L87 Difference]: Start difference. First operand 140 states and 173 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-12-22 08:36:11,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:11,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:11,393 INFO L93 Difference]: Finished difference Result 166 states and 209 transitions. [2021-12-22 08:36:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:36:11,393 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 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 53 [2021-12-22 08:36:11,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:11,394 INFO L225 Difference]: With dead ends: 166 [2021-12-22 08:36:11,394 INFO L226 Difference]: Without dead ends: 163 [2021-12-22 08:36:11,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:36:11,395 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 31 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:11,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 312 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 08:36:11,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-12-22 08:36:11,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 144. [2021-12-22 08:36:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 128 states have (on average 1.2734375) internal successors, (163), 130 states have internal predecessors, (163), 8 states have call successors, (8), 6 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-22 08:36:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 179 transitions. [2021-12-22 08:36:11,404 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 179 transitions. Word has length 53 [2021-12-22 08:36:11,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:11,404 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 179 transitions. [2021-12-22 08:36:11,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-12-22 08:36:11,405 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 179 transitions. [2021-12-22 08:36:11,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 08:36:11,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:11,405 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:11,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 08:36:11,406 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:11,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:11,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1458733262, now seen corresponding path program 1 times [2021-12-22 08:36:11,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:11,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108972311] [2021-12-22 08:36:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:11,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:11,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:36:11,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:11,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:11,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:11,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:11,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108972311] [2021-12-22 08:36:11,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108972311] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:11,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:11,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:36:11,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971589827] [2021-12-22 08:36:11,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:11,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:36:11,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:11,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:36:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:36:11,546 INFO L87 Difference]: Start difference. First operand 144 states and 179 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 08:36:13,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:13,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:13,625 INFO L93 Difference]: Finished difference Result 284 states and 352 transitions. [2021-12-22 08:36:13,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 08:36:13,625 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), 3 states have call successors, (4), 3 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 55 [2021-12-22 08:36:13,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:13,627 INFO L225 Difference]: With dead ends: 284 [2021-12-22 08:36:13,627 INFO L226 Difference]: Without dead ends: 257 [2021-12-22 08:36:13,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:36:13,628 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 76 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 24 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:13,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 312 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 34 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 08:36:13,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-22 08:36:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 252. [2021-12-22 08:36:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 227 states have (on average 1.2863436123348018) internal successors, (292), 229 states have internal predecessors, (292), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-22 08:36:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 317 transitions. [2021-12-22 08:36:13,648 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 317 transitions. Word has length 55 [2021-12-22 08:36:13,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:13,649 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 317 transitions. [2021-12-22 08:36:13,649 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 08:36:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 317 transitions. [2021-12-22 08:36:13,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 08:36:13,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:13,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:13,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 08:36:13,650 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:13,650 INFO L85 PathProgramCache]: Analyzing trace with hash 316274100, now seen corresponding path program 1 times [2021-12-22 08:36:13,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:13,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855598228] [2021-12-22 08:36:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:13,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:13,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 08:36:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:13,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:13,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:13,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:13,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855598228] [2021-12-22 08:36:13,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855598228] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:13,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:13,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:36:13,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015323865] [2021-12-22 08:36:13,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:13,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:36:13,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:13,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:36:13,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:36:13,781 INFO L87 Difference]: Start difference. First operand 252 states and 317 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 4 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 08:36:15,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:16,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:16,509 INFO L93 Difference]: Finished difference Result 468 states and 589 transitions. [2021-12-22 08:36:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:36:16,509 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), 2 states have call successors, (4), 3 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 55 [2021-12-22 08:36:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:16,510 INFO L225 Difference]: With dead ends: 468 [2021-12-22 08:36:16,510 INFO L226 Difference]: Without dead ends: 252 [2021-12-22 08:36:16,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:36:16,511 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 14 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:16,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 414 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 08:36:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-22 08:36:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2021-12-22 08:36:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 223 states have (on average 1.2825112107623318) internal successors, (286), 225 states have internal predecessors, (286), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-22 08:36:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 311 transitions. [2021-12-22 08:36:16,525 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 311 transitions. Word has length 55 [2021-12-22 08:36:16,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:16,525 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 311 transitions. [2021-12-22 08:36:16,525 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), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 08:36:16,525 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 311 transitions. [2021-12-22 08:36:16,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-22 08:36:16,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:16,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:16,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 08:36:16,526 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 2072682020, now seen corresponding path program 1 times [2021-12-22 08:36:16,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627911780] [2021-12-22 08:36:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:16,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:16,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-22 08:36:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:16,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:16,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:16,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:16,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627911780] [2021-12-22 08:36:16,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627911780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:16,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:16,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 08:36:16,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032591292] [2021-12-22 08:36:16,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:16,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:36:16,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:16,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:36:16,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:36:16,784 INFO L87 Difference]: Start difference. First operand 248 states and 311 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 08:36:17,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:19,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:19,443 INFO L93 Difference]: Finished difference Result 476 states and 599 transitions. [2021-12-22 08:36:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:36:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (4), 3 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 60 [2021-12-22 08:36:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:19,445 INFO L225 Difference]: With dead ends: 476 [2021-12-22 08:36:19,445 INFO L226 Difference]: Without dead ends: 250 [2021-12-22 08:36:19,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 08:36:19,447 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 7 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:19,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 381 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-22 08:36:19,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-22 08:36:19,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2021-12-22 08:36:19,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 225 states have (on average 1.28) internal successors, (288), 227 states have internal predecessors, (288), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-22 08:36:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 313 transitions. [2021-12-22 08:36:19,462 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 313 transitions. Word has length 60 [2021-12-22 08:36:19,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:19,462 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 313 transitions. [2021-12-22 08:36:19,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-22 08:36:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 313 transitions. [2021-12-22 08:36:19,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-22 08:36:19,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:19,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:19,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 08:36:19,464 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:19,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1685978785, now seen corresponding path program 1 times [2021-12-22 08:36:19,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:19,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501400] [2021-12-22 08:36:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:19,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:19,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 08:36:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:19,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:19,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 08:36:19,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501400] [2021-12-22 08:36:19,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:36:19,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076674059] [2021-12-22 08:36:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:19,850 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:36:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:36:19,852 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 08:36:19,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:36:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:20,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1470 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 08:36:20,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:36:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:36:20,737 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:36:20,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076674059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:20,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:36:20,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-12-22 08:36:20,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725823942] [2021-12-22 08:36:20,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:20,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:36:20,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:20,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:36:20,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:36:20,738 INFO L87 Difference]: Start difference. First operand 250 states and 313 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 08:36:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:20,755 INFO L93 Difference]: Finished difference Result 336 states and 423 transitions. [2021-12-22 08:36:20,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:36:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 61 [2021-12-22 08:36:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:20,757 INFO L225 Difference]: With dead ends: 336 [2021-12-22 08:36:20,757 INFO L226 Difference]: Without dead ends: 236 [2021-12-22 08:36:20,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:36:20,757 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 15 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:20,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 437 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:36:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-12-22 08:36:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2021-12-22 08:36:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 211 states have (on average 1.2701421800947867) internal successors, (268), 213 states have internal predecessors, (268), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-22 08:36:20,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 293 transitions. [2021-12-22 08:36:20,772 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 293 transitions. Word has length 61 [2021-12-22 08:36:20,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:20,772 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 293 transitions. [2021-12-22 08:36:20,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 08:36:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 293 transitions. [2021-12-22 08:36:20,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 08:36:20,773 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:20,773 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:20,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 08:36:20,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-22 08:36:21,000 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1919232474, now seen corresponding path program 1 times [2021-12-22 08:36:21,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:21,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358303801] [2021-12-22 08:36:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:21,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:21,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 08:36:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:21,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:21,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:36:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:36:21,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:21,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358303801] [2021-12-22 08:36:21,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358303801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:21,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:21,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 08:36:21,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216075840] [2021-12-22 08:36:21,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:21,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:36:21,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:21,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:36:21,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:36:21,233 INFO L87 Difference]: Start difference. First operand 236 states and 293 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:36:23,246 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:25,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:26,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:27,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:27,678 INFO L93 Difference]: Finished difference Result 310 states and 391 transitions. [2021-12-22 08:36:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:36:27,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 65 [2021-12-22 08:36:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:27,679 INFO L225 Difference]: With dead ends: 310 [2021-12-22 08:36:27,679 INFO L226 Difference]: Without dead ends: 224 [2021-12-22 08:36:27,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-12-22 08:36:27,680 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 105 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 30 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:27,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 409 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 123 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-12-22 08:36:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-22 08:36:27,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-12-22 08:36:27,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 201 states have (on average 1.263681592039801) internal successors, (254), 203 states have internal predecessors, (254), 11 states have call successors, (11), 9 states have call predecessors, (11), 11 states have return successors, (12), 11 states have call predecessors, (12), 8 states have call successors, (12) [2021-12-22 08:36:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 277 transitions. [2021-12-22 08:36:27,693 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 277 transitions. Word has length 65 [2021-12-22 08:36:27,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:27,693 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 277 transitions. [2021-12-22 08:36:27,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 6 states have internal predecessors, (57), 3 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:36:27,693 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 277 transitions. [2021-12-22 08:36:27,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 08:36:27,694 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:27,694 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:27,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 08:36:27,694 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1018080202, now seen corresponding path program 1 times [2021-12-22 08:36:27,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:27,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859812460] [2021-12-22 08:36:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:27,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:27,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 08:36:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:27,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:27,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:27,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:36:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:36:27,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:27,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859812460] [2021-12-22 08:36:27,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859812460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:27,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:27,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 08:36:27,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811335920] [2021-12-22 08:36:27,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:27,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:36:27,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:27,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:36:27,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:36:27,927 INFO L87 Difference]: Start difference. First operand 224 states and 277 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 5 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 08:36:29,934 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:30,068 INFO L93 Difference]: Finished difference Result 287 states and 351 transitions. [2021-12-22 08:36:30,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:36:30,068 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), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 67 [2021-12-22 08:36:30,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:30,069 INFO L225 Difference]: With dead ends: 287 [2021-12-22 08:36:30,069 INFO L226 Difference]: Without dead ends: 260 [2021-12-22 08:36:30,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:36:30,070 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 52 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:30,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 765 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 162 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 08:36:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-22 08:36:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 240. [2021-12-22 08:36:30,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 215 states have (on average 1.255813953488372) internal successors, (270), 217 states have internal predecessors, (270), 11 states have call successors, (11), 9 states have call predecessors, (11), 13 states have return successors, (14), 13 states have call predecessors, (14), 8 states have call successors, (14) [2021-12-22 08:36:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 295 transitions. [2021-12-22 08:36:30,083 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 295 transitions. Word has length 67 [2021-12-22 08:36:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:30,083 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 295 transitions. [2021-12-22 08:36:30,084 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), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 08:36:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 295 transitions. [2021-12-22 08:36:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 08:36:30,084 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:30,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:30,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 08:36:30,085 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:30,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:30,085 INFO L85 PathProgramCache]: Analyzing trace with hash 555821410, now seen corresponding path program 1 times [2021-12-22 08:36:30,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:30,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875143613] [2021-12-22 08:36:30,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:30,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:30,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 08:36:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:30,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:30,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:36:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:30,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:36:30,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:30,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875143613] [2021-12-22 08:36:30,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875143613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:30,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:30,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:36:30,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558276653] [2021-12-22 08:36:30,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:30,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:36:30,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:30,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:36:30,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:36:30,232 INFO L87 Difference]: Start difference. First operand 240 states and 295 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:36:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:33,229 INFO L93 Difference]: Finished difference Result 325 states and 391 transitions. [2021-12-22 08:36:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 08:36:33,230 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 66 [2021-12-22 08:36:33,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:33,231 INFO L225 Difference]: With dead ends: 325 [2021-12-22 08:36:33,231 INFO L226 Difference]: Without dead ends: 265 [2021-12-22 08:36:33,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:36:33,235 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 56 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:33,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 419 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 08:36:33,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-12-22 08:36:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 247. [2021-12-22 08:36:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 221 states have (on average 1.2081447963800904) internal successors, (267), 223 states have internal predecessors, (267), 11 states have call successors, (11), 10 states have call predecessors, (11), 14 states have return successors, (15), 13 states have call predecessors, (15), 9 states have call successors, (15) [2021-12-22 08:36:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 293 transitions. [2021-12-22 08:36:33,249 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 293 transitions. Word has length 66 [2021-12-22 08:36:33,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:33,250 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 293 transitions. [2021-12-22 08:36:33,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 3 states have internal predecessors, (59), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 08:36:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 293 transitions. [2021-12-22 08:36:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 08:36:33,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:33,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:33,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 08:36:33,252 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash -118230121, now seen corresponding path program 1 times [2021-12-22 08:36:33,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:33,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001933628] [2021-12-22 08:36:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:33,253 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:33,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:33,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 08:36:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:33,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:33,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:36:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:36:33,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001933628] [2021-12-22 08:36:33,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001933628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:33,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:33,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 08:36:33,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229694488] [2021-12-22 08:36:33,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:33,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 08:36:33,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:33,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 08:36:33,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:36:33,454 INFO L87 Difference]: Start difference. First operand 247 states and 293 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 08:36:34,556 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:35,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:37,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 08:36:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:36:37,698 INFO L93 Difference]: Finished difference Result 336 states and 398 transitions. [2021-12-22 08:36:37,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 08:36:37,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 68 [2021-12-22 08:36:37,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:36:37,700 INFO L225 Difference]: With dead ends: 336 [2021-12-22 08:36:37,700 INFO L226 Difference]: Without dead ends: 257 [2021-12-22 08:36:37,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 08:36:37,701 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 44 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-22 08:36:37,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 833 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-22 08:36:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-12-22 08:36:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 237. [2021-12-22 08:36:37,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 213 states have (on average 1.187793427230047) internal successors, (253), 215 states have internal predecessors, (253), 11 states have call successors, (11), 10 states have call predecessors, (11), 12 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2021-12-22 08:36:37,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 277 transitions. [2021-12-22 08:36:37,715 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 277 transitions. Word has length 68 [2021-12-22 08:36:37,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:36:37,715 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 277 transitions. [2021-12-22 08:36:37,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 08:36:37,715 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 277 transitions. [2021-12-22 08:36:37,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 08:36:37,716 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:36:37,716 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 08:36:37,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 08:36:37,716 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorFnErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:36:37,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:36:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1748301759, now seen corresponding path program 1 times [2021-12-22 08:36:37,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:36:37,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314551304] [2021-12-22 08:36:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:36:37,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:36:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:37,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 08:36:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:37,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:36:37,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:37,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:36:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:36:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-22 08:36:37,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:36:37,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314551304] [2021-12-22 08:36:37,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314551304] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:36:37,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:36:37,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:36:37,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864829814] [2021-12-22 08:36:37,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:36:37,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:36:37,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:36:37,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:36:37,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:36:37,855 INFO L87 Difference]: Start difference. First operand 237 states and 277 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 08:36:40,669 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []