./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-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 64bit --witnessprinter.graph.data.programhash cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:55:13,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:55:13,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:55:13,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:55:13,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:55:13,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:55:13,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:55:13,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:55:13,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:55:13,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:55:13,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:55:13,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:55:13,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:55:13,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:55:13,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:55:13,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:55:13,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:55:13,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:55:13,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:55:13,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:55:13,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:55:13,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:55:13,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:55:13,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:55:13,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:55:13,799 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:55:13,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:55:13,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:55:13,800 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:55:13,801 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:55:13,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:55:13,801 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:55:13,802 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:55:13,802 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:55:13,803 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:55:13,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:55:13,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:55:13,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:55:13,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:55:13,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:55:13,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:55:13,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:55:13,826 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:55:13,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:55:13,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:55:13,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:55:13,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:55:13,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:55:13,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:55:13,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:55:13,830 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:55:13,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:55:13,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:55:13,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:55:13,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:55:13,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:55:13,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:55:13,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:55:13,832 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:55:13,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:55:13,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:55:13,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:55:13,833 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:55:13,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:55:13,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:55:13,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:55:13,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:55:13,834 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:55:13,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:55:13,835 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:55:13,835 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:55:13,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:55:13,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb4cf2f7b619bb65636b8158cc0f6ae5cf90699f1f1c19bf802021a20c422d2c [2021-12-28 03:55:14,134 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:55:14,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:55:14,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:55:14,170 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:55:14,171 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:55:14,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-12-28 03:55:14,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da24ef594/02f63382a7144c6abf84da117cadb0cd/FLAGa043e0834 [2021-12-28 03:55:14,722 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:55:14,723 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-12-28 03:55:14,752 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da24ef594/02f63382a7144c6abf84da117cadb0cd/FLAGa043e0834 [2021-12-28 03:55:14,949 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da24ef594/02f63382a7144c6abf84da117cadb0cd [2021-12-28 03:55:14,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:55:14,954 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:55:14,956 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:55:14,957 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:55:14,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:55:14,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:55:14" (1/1) ... [2021-12-28 03:55:14,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f5a18b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:14, skipping insertion in model container [2021-12-28 03:55:14,963 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:55:14" (1/1) ... [2021-12-28 03:55:14,969 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:55:15,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:55:15,459 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/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-12-28 03:55:15,589 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:55:15,598 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:55:15,718 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/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2021-12-28 03:55:15,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:55:15,790 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:55:15,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15 WrapperNode [2021-12-28 03:55:15,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:55:15,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:55:15,794 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:55:15,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:55:15,799 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,883 INFO L137 Inliner]: procedures = 82, calls = 140, calls flagged for inlining = 26, calls inlined = 23, statements flattened = 461 [2021-12-28 03:55:15,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:55:15,886 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:55:15,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:55:15,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:55:15,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,901 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,938 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:55:15,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:55:15,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:55:15,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:55:15,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (1/1) ... [2021-12-28 03:55:15,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:55:15,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:16,005 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) [2021-12-28 03:55:16,020 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 [2021-12-28 03:55:16,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:55:16,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 03:55:16,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:55:16,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:55:16,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 03:55:16,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 03:55:16,036 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 03:55:16,036 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 03:55:16,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:55:16,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:55:16,037 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-28 03:55:16,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-28 03:55:16,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 03:55:16,037 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 03:55:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:55:16,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:55:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:55:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:55:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-28 03:55:16,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-28 03:55:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:55:16,038 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:55:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:55:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-28 03:55:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-28 03:55:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:55:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:55:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:55:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:55:16,039 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-12-28 03:55:16,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~X~$Pointer$~X~int~TO~VOID [2021-12-28 03:55:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 03:55:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-28 03:55:16,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-28 03:55:16,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:55:16,040 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:55:16,248 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:55:16,250 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:55:16,316 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 03:55:16,704 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:55:16,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:55:16,714 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 03:55:16,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:55:16 BoogieIcfgContainer [2021-12-28 03:55:16,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:55:16,718 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:55:16,718 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:55:16,720 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:55:16,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:55:14" (1/3) ... [2021-12-28 03:55:16,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673150cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:55:16, skipping insertion in model container [2021-12-28 03:55:16,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:55:15" (2/3) ... [2021-12-28 03:55:16,722 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@673150cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:55:16, skipping insertion in model container [2021-12-28 03:55:16,722 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:55:16" (3/3) ... [2021-12-28 03:55:16,724 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2021-12-28 03:55:16,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:55:16,728 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:55:16,769 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:55:16,775 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 [2021-12-28 03:55:16,775 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:55:16,801 INFO L276 IsEmpty]: Start isEmpty. Operand has 164 states, 131 states have (on average 1.4198473282442747) internal successors, (186), 136 states have internal predecessors, (186), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2021-12-28 03:55:16,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-28 03:55:16,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:16,808 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] [2021-12-28 03:55:16,808 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:16,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:16,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1048731652, now seen corresponding path program 1 times [2021-12-28 03:55:16,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:16,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065302903] [2021-12-28 03:55:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:16,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:17,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:55:17,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:17,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065302903] [2021-12-28 03:55:17,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065302903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:17,147 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:17,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:55:17,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798135782] [2021-12-28 03:55:17,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:17,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:17,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:17,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:17,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:17,182 INFO L87 Difference]: Start difference. First operand has 164 states, 131 states have (on average 1.4198473282442747) internal successors, (186), 136 states have internal predecessors, (186), 22 states have call successors, (22), 10 states have call predecessors, (22), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-12-28 03:55:17,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:17,514 INFO L93 Difference]: Finished difference Result 500 states and 731 transitions. [2021-12-28 03:55:17,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:55:17,516 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2021-12-28 03:55:17,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:17,529 INFO L225 Difference]: With dead ends: 500 [2021-12-28 03:55:17,530 INFO L226 Difference]: Without dead ends: 327 [2021-12-28 03:55:17,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:17,540 INFO L933 BasicCegarLoop]: 231 mSDtfsCounter, 275 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:17,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 496 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:17,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-12-28 03:55:17,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 279. [2021-12-28 03:55:17,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 228 states have (on average 1.3421052631578947) internal successors, (306), 228 states have internal predecessors, (306), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-28 03:55:17,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 373 transitions. [2021-12-28 03:55:17,593 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 373 transitions. Word has length 25 [2021-12-28 03:55:17,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:17,593 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 373 transitions. [2021-12-28 03:55:17,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2021-12-28 03:55:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 373 transitions. [2021-12-28 03:55:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-28 03:55:17,597 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:17,597 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] [2021-12-28 03:55:17,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:55:17,598 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:17,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:17,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1324273599, now seen corresponding path program 1 times [2021-12-28 03:55:17,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:17,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982948472] [2021-12-28 03:55:17,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:17,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:17,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:55:17,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:17,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982948472] [2021-12-28 03:55:17,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982948472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:17,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:17,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:55:17,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605638095] [2021-12-28 03:55:17,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:17,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:55:17,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:17,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:55:17,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:17,680 INFO L87 Difference]: Start difference. First operand 279 states and 373 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-12-28 03:55:17,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:17,855 INFO L93 Difference]: Finished difference Result 602 states and 813 transitions. [2021-12-28 03:55:17,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 03:55:17,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2021-12-28 03:55:17,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:17,858 INFO L225 Difference]: With dead ends: 602 [2021-12-28 03:55:17,858 INFO L226 Difference]: Without dead ends: 331 [2021-12-28 03:55:17,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:55:17,859 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 49 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:17,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 458 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 03:55:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-28 03:55:17,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 280. [2021-12-28 03:55:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 229 states have (on average 1.3406113537117903) internal successors, (307), 229 states have internal predecessors, (307), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-28 03:55:17,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 374 transitions. [2021-12-28 03:55:17,874 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 374 transitions. Word has length 30 [2021-12-28 03:55:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:17,875 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 374 transitions. [2021-12-28 03:55:17,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2021-12-28 03:55:17,875 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 374 transitions. [2021-12-28 03:55:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-28 03:55:17,876 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:17,876 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] [2021-12-28 03:55:17,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:55:17,876 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash -115857752, now seen corresponding path program 1 times [2021-12-28 03:55:17,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:17,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156856170] [2021-12-28 03:55:17,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:17,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:17,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:55:17,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:17,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156856170] [2021-12-28 03:55:17,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156856170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086861834] [2021-12-28 03:55:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:17,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:17,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:17,954 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) [2021-12-28 03:55:17,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:55:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:55:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:55:18,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:55:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 03:55:18,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086861834] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:55:18,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:55:18,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-12-28 03:55:18,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726079373] [2021-12-28 03:55:18,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:55:18,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:55:18,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:18,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:55:18,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:55:18,302 INFO L87 Difference]: Start difference. First operand 280 states and 374 transitions. Second operand has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:55:18,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:18,545 INFO L93 Difference]: Finished difference Result 612 states and 827 transitions. [2021-12-28 03:55:18,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:55:18,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-12-28 03:55:18,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:18,549 INFO L225 Difference]: With dead ends: 612 [2021-12-28 03:55:18,549 INFO L226 Difference]: Without dead ends: 340 [2021-12-28 03:55:18,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:55:18,550 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 63 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:18,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 762 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:18,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-28 03:55:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 292. [2021-12-28 03:55:18,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 241 states have (on average 1.3360995850622406) internal successors, (322), 241 states have internal predecessors, (322), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-28 03:55:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 389 transitions. [2021-12-28 03:55:18,578 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 389 transitions. Word has length 34 [2021-12-28 03:55:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:18,579 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 389 transitions. [2021-12-28 03:55:18,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.375) internal successors, (43), 7 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 03:55:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 389 transitions. [2021-12-28 03:55:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-28 03:55:18,580 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:18,580 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:18,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:18,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:18,796 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:18,796 INFO L85 PathProgramCache]: Analyzing trace with hash -124336931, now seen corresponding path program 2 times [2021-12-28 03:55:18,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:18,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911242431] [2021-12-28 03:55:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:18,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-28 03:55:18,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911242431] [2021-12-28 03:55:18,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911242431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:18,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:18,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:55:18,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279946627] [2021-12-28 03:55:18,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:18,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:55:18,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:18,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:55:18,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:18,887 INFO L87 Difference]: Start difference. First operand 292 states and 389 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2021-12-28 03:55:19,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:19,158 INFO L93 Difference]: Finished difference Result 623 states and 837 transitions. [2021-12-28 03:55:19,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:55:19,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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 46 [2021-12-28 03:55:19,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:19,160 INFO L225 Difference]: With dead ends: 623 [2021-12-28 03:55:19,160 INFO L226 Difference]: Without dead ends: 339 [2021-12-28 03:55:19,161 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 [2021-12-28 03:55:19,163 INFO L933 BasicCegarLoop]: 287 mSDtfsCounter, 356 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:19,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 614 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-12-28 03:55:19,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 291. [2021-12-28 03:55:19,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 240 states have (on average 1.325) internal successors, (318), 240 states have internal predecessors, (318), 34 states have call successors, (34), 17 states have call predecessors, (34), 16 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2021-12-28 03:55:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 385 transitions. [2021-12-28 03:55:19,185 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 385 transitions. Word has length 46 [2021-12-28 03:55:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:19,186 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 385 transitions. [2021-12-28 03:55:19,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 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) [2021-12-28 03:55:19,186 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 385 transitions. [2021-12-28 03:55:19,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 03:55:19,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:19,199 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:19,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:55:19,200 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:19,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1440028180, now seen corresponding path program 1 times [2021-12-28 03:55:19,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:19,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172268475] [2021-12-28 03:55:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:19,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:55:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:55:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,324 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-28 03:55:19,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:19,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172268475] [2021-12-28 03:55:19,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172268475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:19,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:19,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:55:19,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911765806] [2021-12-28 03:55:19,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:19,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:55:19,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:19,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:55:19,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:55:19,326 INFO L87 Difference]: Start difference. First operand 291 states and 385 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 03:55:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:19,620 INFO L93 Difference]: Finished difference Result 946 states and 1278 transitions. [2021-12-28 03:55:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:55:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-28 03:55:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:19,623 INFO L225 Difference]: With dead ends: 946 [2021-12-28 03:55:19,623 INFO L226 Difference]: Without dead ends: 658 [2021-12-28 03:55:19,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:55:19,625 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 262 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:19,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 813 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:19,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2021-12-28 03:55:19,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 582. [2021-12-28 03:55:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 479 states have (on average 1.3298538622129437) internal successors, (637), 481 states have internal predecessors, (637), 66 states have call successors, (66), 33 states have call predecessors, (66), 36 states have return successors, (75), 67 states have call predecessors, (75), 65 states have call successors, (75) [2021-12-28 03:55:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 778 transitions. [2021-12-28 03:55:19,677 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 778 transitions. Word has length 67 [2021-12-28 03:55:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:19,678 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 778 transitions. [2021-12-28 03:55:19,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 03:55:19,678 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 778 transitions. [2021-12-28 03:55:19,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-28 03:55:19,680 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:19,680 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:19,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:55:19,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:19,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:19,681 INFO L85 PathProgramCache]: Analyzing trace with hash 338916268, now seen corresponding path program 1 times [2021-12-28 03:55:19,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:19,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552612663] [2021-12-28 03:55:19,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:19,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-28 03:55:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:55:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-28 03:55:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 03:55:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:19,778 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-28 03:55:19,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:19,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552612663] [2021-12-28 03:55:19,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552612663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:19,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:19,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:55:19,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314120955] [2021-12-28 03:55:19,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:19,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:55:19,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:19,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:55:19,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:55:19,780 INFO L87 Difference]: Start difference. First operand 582 states and 778 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:55:20,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:20,019 INFO L93 Difference]: Finished difference Result 1034 states and 1386 transitions. [2021-12-28 03:55:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 03:55:20,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 104 [2021-12-28 03:55:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:20,021 INFO L225 Difference]: With dead ends: 1034 [2021-12-28 03:55:20,021 INFO L226 Difference]: Without dead ends: 460 [2021-12-28 03:55:20,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:55:20,023 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 104 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:20,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 545 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2021-12-28 03:55:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 378. [2021-12-28 03:55:20,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 319 states have (on average 1.3322884012539185) internal successors, (425), 321 states have internal predecessors, (425), 37 states have call successors, (37), 19 states have call predecessors, (37), 21 states have return successors, (43), 37 states have call predecessors, (43), 36 states have call successors, (43) [2021-12-28 03:55:20,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 505 transitions. [2021-12-28 03:55:20,054 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 505 transitions. Word has length 104 [2021-12-28 03:55:20,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:20,055 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 505 transitions. [2021-12-28 03:55:20,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-28 03:55:20,055 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 505 transitions. [2021-12-28 03:55:20,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-12-28 03:55:20,056 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:20,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:20,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:55:20,057 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:20,057 INFO L85 PathProgramCache]: Analyzing trace with hash 335119820, now seen corresponding path program 2 times [2021-12-28 03:55:20,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:20,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14064380] [2021-12-28 03:55:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:20,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:55:20,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:55:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:55:20,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:55:20,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-28 03:55:20,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:20,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14064380] [2021-12-28 03:55:20,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14064380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:20,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:20,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:55:20,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260135397] [2021-12-28 03:55:20,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:20,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:55:20,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:20,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:55:20,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:55:20,224 INFO L87 Difference]: Start difference. First operand 378 states and 505 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 03:55:20,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:20,484 INFO L93 Difference]: Finished difference Result 748 states and 1012 transitions. [2021-12-28 03:55:20,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 03:55:20,485 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) Word has length 104 [2021-12-28 03:55:20,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:20,487 INFO L225 Difference]: With dead ends: 748 [2021-12-28 03:55:20,487 INFO L226 Difference]: Without dead ends: 402 [2021-12-28 03:55:20,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:55:20,488 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 72 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:20,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 743 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:20,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-12-28 03:55:20,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 376. [2021-12-28 03:55:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 316 states have (on average 1.3227848101265822) internal successors, (418), 318 states have internal predecessors, (418), 37 states have call successors, (37), 19 states have call predecessors, (37), 22 states have return successors, (46), 38 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-28 03:55:20,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 501 transitions. [2021-12-28 03:55:20,502 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 501 transitions. Word has length 104 [2021-12-28 03:55:20,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:20,502 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 501 transitions. [2021-12-28 03:55:20,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 4 states have internal predecessors, (71), 2 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 3 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-28 03:55:20,503 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 501 transitions. [2021-12-28 03:55:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-28 03:55:20,503 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:20,504 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:20,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 03:55:20,504 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:20,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:20,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1793628438, now seen corresponding path program 1 times [2021-12-28 03:55:20,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:20,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853335322] [2021-12-28 03:55:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:20,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:55:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:55:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:55:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:55:20,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-28 03:55:20,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:20,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853335322] [2021-12-28 03:55:20,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853335322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:20,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:20,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 03:55:20,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324557002] [2021-12-28 03:55:20,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:20,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:55:20,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:55:20,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:55:20,739 INFO L87 Difference]: Start difference. First operand 376 states and 501 transitions. Second operand has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 03:55:21,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:21,347 INFO L93 Difference]: Finished difference Result 970 states and 1346 transitions. [2021-12-28 03:55:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 03:55:21,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2021-12-28 03:55:21,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:21,350 INFO L225 Difference]: With dead ends: 970 [2021-12-28 03:55:21,350 INFO L226 Difference]: Without dead ends: 626 [2021-12-28 03:55:21,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-12-28 03:55:21,351 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 150 mSDsluCounter, 2333 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:21,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 2649 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 03:55:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-12-28 03:55:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 382. [2021-12-28 03:55:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 321 states have (on average 1.3115264797507789) internal successors, (421), 322 states have internal predecessors, (421), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (47), 40 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-28 03:55:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 505 transitions. [2021-12-28 03:55:21,373 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 505 transitions. Word has length 111 [2021-12-28 03:55:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 505 transitions. [2021-12-28 03:55:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.333333333333333) internal successors, (76), 8 states have internal predecessors, (76), 3 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 03:55:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 505 transitions. [2021-12-28 03:55:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-28 03:55:21,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:21,376 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:21,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 03:55:21,376 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:21,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:21,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1834540397, now seen corresponding path program 1 times [2021-12-28 03:55:21,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:21,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409602871] [2021-12-28 03:55:21,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:21,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-28 03:55:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:55:21,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2021-12-28 03:55:21,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 03:55:21,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:55:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-28 03:55:21,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:21,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409602871] [2021-12-28 03:55:21,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409602871] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:21,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639720622] [2021-12-28 03:55:21,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:21,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:21,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:21,540 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:21,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 03:55:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:21,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 03:55:21,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 03:55:21,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:55:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-28 03:55:22,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639720622] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:55:22,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:55:22,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2021-12-28 03:55:22,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428391833] [2021-12-28 03:55:22,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:55:22,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 03:55:22,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:22,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 03:55:22,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:55:22,097 INFO L87 Difference]: Start difference. First operand 382 states and 505 transitions. Second operand has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:55:22,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:22,373 INFO L93 Difference]: Finished difference Result 800 states and 1076 transitions. [2021-12-28 03:55:22,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 03:55:22,374 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 117 [2021-12-28 03:55:22,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:22,376 INFO L225 Difference]: With dead ends: 800 [2021-12-28 03:55:22,376 INFO L226 Difference]: Without dead ends: 450 [2021-12-28 03:55:22,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-12-28 03:55:22,377 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 117 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:22,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 702 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:22,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-12-28 03:55:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 430. [2021-12-28 03:55:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 369 states have (on average 1.3035230352303524) internal successors, (481), 370 states have internal predecessors, (481), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (47), 40 states have call predecessors, (47), 36 states have call successors, (47) [2021-12-28 03:55:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 565 transitions. [2021-12-28 03:55:22,394 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 565 transitions. Word has length 117 [2021-12-28 03:55:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:22,394 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 565 transitions. [2021-12-28 03:55:22,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 8.6875) internal successors, (139), 13 states have internal predecessors, (139), 2 states have call successors, (22), 5 states have call predecessors, (22), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-28 03:55:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 565 transitions. [2021-12-28 03:55:22,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-12-28 03:55:22,397 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:22,398 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:22,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:22,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-28 03:55:22,618 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1065505129, now seen corresponding path program 2 times [2021-12-28 03:55:22,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:22,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227642254] [2021-12-28 03:55:22,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:22,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:22,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:55:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:55:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 03:55:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:55:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:22,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 03:55:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-28 03:55:22,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:22,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227642254] [2021-12-28 03:55:22,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227642254] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:22,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411867350] [2021-12-28 03:55:22,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:55:22,815 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:22,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:22,816 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:22,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 03:55:22,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 03:55:22,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:55:22,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-28 03:55:22,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:23,457 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-12-28 03:55:23,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:23,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411867350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:23,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:23,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [16] total 29 [2021-12-28 03:55:23,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245397614] [2021-12-28 03:55:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:23,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-28 03:55:23,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-28 03:55:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-12-28 03:55:23,460 INFO L87 Difference]: Start difference. First operand 430 states and 565 transitions. Second operand has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 03:55:23,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:23,823 INFO L93 Difference]: Finished difference Result 1098 states and 1476 transitions. [2021-12-28 03:55:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 03:55:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 141 [2021-12-28 03:55:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:23,827 INFO L225 Difference]: With dead ends: 1098 [2021-12-28 03:55:23,827 INFO L226 Difference]: Without dead ends: 700 [2021-12-28 03:55:23,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 03:55:23,828 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 297 mSDsluCounter, 3516 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 3839 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:23,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 3839 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:23,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-12-28 03:55:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 440. [2021-12-28 03:55:23,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 377 states have (on average 1.297082228116711) internal successors, (489), 378 states have internal predecessors, (489), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (49), 42 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-28 03:55:23,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 577 transitions. [2021-12-28 03:55:23,853 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 577 transitions. Word has length 141 [2021-12-28 03:55:23,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:23,853 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 577 transitions. [2021-12-28 03:55:23,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 5.714285714285714) internal successors, (80), 12 states have internal predecessors, (80), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 03:55:23,853 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 577 transitions. [2021-12-28 03:55:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-12-28 03:55:23,856 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:23,856 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:23,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:24,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:24,072 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:24,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1149357710, now seen corresponding path program 1 times [2021-12-28 03:55:24,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:24,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853045735] [2021-12-28 03:55:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:24,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:55:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:55:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 03:55:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:55:24,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 03:55:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 03:55:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,286 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-28 03:55:24,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:24,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853045735] [2021-12-28 03:55:24,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853045735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:24,287 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:24,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 03:55:24,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744667703] [2021-12-28 03:55:24,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:24,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 03:55:24,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:24,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 03:55:24,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-28 03:55:24,289 INFO L87 Difference]: Start difference. First operand 440 states and 577 transitions. Second operand has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-28 03:55:24,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:24,517 INFO L93 Difference]: Finished difference Result 673 states and 894 transitions. [2021-12-28 03:55:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:55:24,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 154 [2021-12-28 03:55:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:24,526 INFO L225 Difference]: With dead ends: 673 [2021-12-28 03:55:24,526 INFO L226 Difference]: Without dead ends: 462 [2021-12-28 03:55:24,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-12-28 03:55:24,527 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 167 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:24,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 567 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 03:55:24,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-12-28 03:55:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 442. [2021-12-28 03:55:24,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 379 states have (on average 1.2955145118733509) internal successors, (491), 380 states have internal predecessors, (491), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (49), 42 states have call predecessors, (49), 38 states have call successors, (49) [2021-12-28 03:55:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 579 transitions. [2021-12-28 03:55:24,547 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 579 transitions. Word has length 154 [2021-12-28 03:55:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:24,547 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 579 transitions. [2021-12-28 03:55:24,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.125) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-12-28 03:55:24,547 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 579 transitions. [2021-12-28 03:55:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-28 03:55:24,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:24,549 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:24,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 03:55:24,549 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:24,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1983743405, now seen corresponding path program 1 times [2021-12-28 03:55:24,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:24,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137152850] [2021-12-28 03:55:24,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:24,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:55:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:55:24,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 03:55:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:55:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:24,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-28 03:55:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 03:55:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 03:55:24,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-12-28 03:55:24,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:24,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137152850] [2021-12-28 03:55:24,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137152850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:24,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:55:24,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-28 03:55:24,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299099719] [2021-12-28 03:55:24,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:24,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-28 03:55:24,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:24,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-28 03:55:24,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:55:24,759 INFO L87 Difference]: Start difference. First operand 442 states and 579 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 03:55:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:25,282 INFO L93 Difference]: Finished difference Result 880 states and 1161 transitions. [2021-12-28 03:55:25,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 03:55:25,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-12-28 03:55:25,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:25,285 INFO L225 Difference]: With dead ends: 880 [2021-12-28 03:55:25,285 INFO L226 Difference]: Without dead ends: 470 [2021-12-28 03:55:25,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-12-28 03:55:25,286 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 513 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:25,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 808 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:55:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-12-28 03:55:25,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 440. [2021-12-28 03:55:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 377 states have (on average 1.2891246684350133) internal successors, (486), 378 states have internal predecessors, (486), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (48), 42 states have call predecessors, (48), 38 states have call successors, (48) [2021-12-28 03:55:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 573 transitions. [2021-12-28 03:55:25,304 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 573 transitions. Word has length 156 [2021-12-28 03:55:25,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:25,305 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 573 transitions. [2021-12-28 03:55:25,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 4 states have call successors, (10), 7 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-28 03:55:25,305 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 573 transitions. [2021-12-28 03:55:25,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 03:55:25,306 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:25,307 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:25,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 03:55:25,307 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:25,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2106669318, now seen corresponding path program 1 times [2021-12-28 03:55:25,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:25,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767910635] [2021-12-28 03:55:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:25,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 03:55:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-28 03:55:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-28 03:55:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-28 03:55:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:25,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 03:55:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 03:55:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-28 03:55:25,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-28 03:55:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 03:55:25,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:25,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767910635] [2021-12-28 03:55:25,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767910635] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:25,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574609312] [2021-12-28 03:55:25,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:25,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:25,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:25,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:25,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 03:55:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:25,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 03:55:25,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:26,010 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 19 proven. 190 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 03:55:26,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:55:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 03:55:26,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574609312] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:55:26,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:55:26,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 30 [2021-12-28 03:55:26,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207266403] [2021-12-28 03:55:26,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:55:26,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-28 03:55:26,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-28 03:55:26,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=554, Unknown=0, NotChecked=0, Total=870 [2021-12-28 03:55:26,404 INFO L87 Difference]: Start difference. First operand 440 states and 573 transitions. Second operand has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:55:26,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:26,878 INFO L93 Difference]: Finished difference Result 966 states and 1287 transitions. [2021-12-28 03:55:26,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 03:55:26,878 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 168 [2021-12-28 03:55:26,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:26,880 INFO L225 Difference]: With dead ends: 966 [2021-12-28 03:55:26,880 INFO L226 Difference]: Without dead ends: 558 [2021-12-28 03:55:26,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=608, Unknown=0, NotChecked=0, Total=930 [2021-12-28 03:55:26,882 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 178 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 1338 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:26,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 1338 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:55:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-12-28 03:55:26,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 536. [2021-12-28 03:55:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 473 states have (on average 1.2811839323467231) internal successors, (606), 474 states have internal predecessors, (606), 39 states have call successors, (39), 19 states have call predecessors, (39), 23 states have return successors, (48), 42 states have call predecessors, (48), 38 states have call successors, (48) [2021-12-28 03:55:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 693 transitions. [2021-12-28 03:55:26,905 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 693 transitions. Word has length 168 [2021-12-28 03:55:26,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 693 transitions. [2021-12-28 03:55:26,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.2) internal successors, (216), 25 states have internal predecessors, (216), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:55:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 693 transitions. [2021-12-28 03:55:26,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-28 03:55:26,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:26,908 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:26,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:27,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:27,123 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:27,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1303518258, now seen corresponding path program 2 times [2021-12-28 03:55:27,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:27,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258327855] [2021-12-28 03:55:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:27,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:27,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 03:55:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 03:55:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-28 03:55:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-28 03:55:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 03:55:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 03:55:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-28 03:55:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-28 03:55:27,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 03:55:27,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:27,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258327855] [2021-12-28 03:55:27,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258327855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:27,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138784796] [2021-12-28 03:55:27,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:55:27,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:27,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:27,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:27,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 03:55:27,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 03:55:27,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:55:27,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 03:55:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 976 trivial. 0 not checked. [2021-12-28 03:55:28,038 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:28,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138784796] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:28,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:28,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [30] total 31 [2021-12-28 03:55:28,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717624250] [2021-12-28 03:55:28,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:28,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 03:55:28,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 03:55:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-12-28 03:55:28,039 INFO L87 Difference]: Start difference. First operand 536 states and 693 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-28 03:55:28,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:28,103 INFO L93 Difference]: Finished difference Result 1346 states and 1766 transitions. [2021-12-28 03:55:28,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 03:55:28,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 216 [2021-12-28 03:55:28,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:28,106 INFO L225 Difference]: With dead ends: 1346 [2021-12-28 03:55:28,106 INFO L226 Difference]: Without dead ends: 842 [2021-12-28 03:55:28,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-12-28 03:55:28,107 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 83 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:28,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 472 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:55:28,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-12-28 03:55:28,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 532. [2021-12-28 03:55:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 471 states have (on average 1.2781316348195328) internal successors, (602), 472 states have internal predecessors, (602), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-28 03:55:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 685 transitions. [2021-12-28 03:55:28,137 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 685 transitions. Word has length 216 [2021-12-28 03:55:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:28,137 INFO L470 AbstractCegarLoop]: Abstraction has 532 states and 685 transitions. [2021-12-28 03:55:28,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-28 03:55:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 685 transitions. [2021-12-28 03:55:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-28 03:55:28,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:28,139 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:28,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:28,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-28 03:55:28,360 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1768078862, now seen corresponding path program 1 times [2021-12-28 03:55:28,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:28,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771302094] [2021-12-28 03:55:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:28,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 03:55:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 03:55:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-12-28 03:55:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-28 03:55:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 03:55:28,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-28 03:55:28,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-28 03:55:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2021-12-28 03:55:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 03:55:28,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:28,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771302094] [2021-12-28 03:55:28,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771302094] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:28,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722725686] [2021-12-28 03:55:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:28,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:28,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:28,800 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:28,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 03:55:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:29,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-28 03:55:29,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 19 proven. 946 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-28 03:55:29,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:55:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 983 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 03:55:30,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722725686] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:55:30,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:55:30,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 54 [2021-12-28 03:55:30,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491270922] [2021-12-28 03:55:30,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:55:30,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-12-28 03:55:30,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-12-28 03:55:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1192, Invalid=1670, Unknown=0, NotChecked=0, Total=2862 [2021-12-28 03:55:30,270 INFO L87 Difference]: Start difference. First operand 532 states and 685 transitions. Second operand has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:55:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:30,815 INFO L93 Difference]: Finished difference Result 1246 states and 1653 transitions. [2021-12-28 03:55:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-12-28 03:55:30,816 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 216 [2021-12-28 03:55:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:30,818 INFO L225 Difference]: With dead ends: 1246 [2021-12-28 03:55:30,818 INFO L226 Difference]: Without dead ends: 746 [2021-12-28 03:55:30,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1198, Invalid=1772, Unknown=0, NotChecked=0, Total=2970 [2021-12-28 03:55:30,822 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 512 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:30,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 967 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 03:55:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-28 03:55:30,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 724. [2021-12-28 03:55:30,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 663 states have (on average 1.2699849170437405) internal successors, (842), 664 states have internal predecessors, (842), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-28 03:55:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 925 transitions. [2021-12-28 03:55:30,865 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 925 transitions. Word has length 216 [2021-12-28 03:55:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:30,865 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 925 transitions. [2021-12-28 03:55:30,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.777777777777778) internal successors, (312), 49 states have internal predecessors, (312), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:55:30,866 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 925 transitions. [2021-12-28 03:55:30,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-12-28 03:55:30,868 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:30,868 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:30,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:31,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 03:55:31,082 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:31,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1934856118, now seen corresponding path program 2 times [2021-12-28 03:55:31,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:31,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434889485] [2021-12-28 03:55:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:31,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:31,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 03:55:32,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-28 03:55:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-12-28 03:55:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-28 03:55:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:32,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2021-12-28 03:55:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-28 03:55:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-12-28 03:55:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2021-12-28 03:55:32,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-28 03:55:32,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:32,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434889485] [2021-12-28 03:55:32,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434889485] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:32,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366881598] [2021-12-28 03:55:32,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:55:32,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:32,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:32,228 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:32,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 03:55:32,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 03:55:32,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:55:32,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 03:55:32,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4216 trivial. 0 not checked. [2021-12-28 03:55:32,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:32,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366881598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:32,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:32,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [54] total 57 [2021-12-28 03:55:32,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158931086] [2021-12-28 03:55:32,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:32,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:55:32,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:32,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:55:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1198, Invalid=1994, Unknown=0, NotChecked=0, Total=3192 [2021-12-28 03:55:32,890 INFO L87 Difference]: Start difference. First operand 724 states and 925 transitions. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 03:55:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:32,987 INFO L93 Difference]: Finished difference Result 1924 states and 2484 transitions. [2021-12-28 03:55:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:55:32,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 312 [2021-12-28 03:55:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:32,991 INFO L225 Difference]: With dead ends: 1924 [2021-12-28 03:55:32,992 INFO L226 Difference]: Without dead ends: 1228 [2021-12-28 03:55:32,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1202, Invalid=2104, Unknown=0, NotChecked=0, Total=3306 [2021-12-28 03:55:32,994 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 84 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:32,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1020 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:55:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2021-12-28 03:55:33,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 726. [2021-12-28 03:55:33,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 665 states have (on average 1.2691729323308272) internal successors, (844), 666 states have internal predecessors, (844), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-28 03:55:33,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 927 transitions. [2021-12-28 03:55:33,034 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 927 transitions. Word has length 312 [2021-12-28 03:55:33,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:33,034 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 927 transitions. [2021-12-28 03:55:33,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 03:55:33,034 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 927 transitions. [2021-12-28 03:55:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2021-12-28 03:55:33,037 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:33,037 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:33,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:33,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:33,251 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:33,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:33,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1480488866, now seen corresponding path program 1 times [2021-12-28 03:55:33,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:33,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788648548] [2021-12-28 03:55:33,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:33,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:33,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-28 03:55:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2021-12-28 03:55:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 229 [2021-12-28 03:55:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2021-12-28 03:55:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2021-12-28 03:55:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 271 [2021-12-28 03:55:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 279 [2021-12-28 03:55:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 289 [2021-12-28 03:55:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-28 03:55:34,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:34,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788648548] [2021-12-28 03:55:34,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788648548] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:34,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588904273] [2021-12-28 03:55:34,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:34,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:34,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:34,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:34,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 03:55:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:34,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 1875 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-28 03:55:34,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 19 proven. 4186 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-28 03:55:35,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:55:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4224 backedges. 7 proven. 4186 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-28 03:55:37,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588904273] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:55:37,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:55:37,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 49, 49] total 102 [2021-12-28 03:55:37,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765127248] [2021-12-28 03:55:37,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:55:37,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-12-28 03:55:37,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-12-28 03:55:37,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4672, Invalid=5630, Unknown=0, NotChecked=0, Total=10302 [2021-12-28 03:55:37,788 INFO L87 Difference]: Start difference. First operand 726 states and 927 transitions. Second operand has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:55:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:38,908 INFO L93 Difference]: Finished difference Result 1822 states and 2419 transitions. [2021-12-28 03:55:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-28 03:55:38,909 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 313 [2021-12-28 03:55:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:38,915 INFO L225 Difference]: With dead ends: 1822 [2021-12-28 03:55:38,915 INFO L226 Difference]: Without dead ends: 1128 [2021-12-28 03:55:38,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4678, Invalid=5828, Unknown=0, NotChecked=0, Total=10506 [2021-12-28 03:55:38,921 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 968 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 969 SdHoareTripleChecker+Valid, 1384 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:38,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [969 Valid, 1384 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 03:55:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2021-12-28 03:55:38,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 1110. [2021-12-28 03:55:38,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 1049 states have (on average 1.2621544327931362) internal successors, (1324), 1050 states have internal predecessors, (1324), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-28 03:55:38,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1407 transitions. [2021-12-28 03:55:38,996 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1407 transitions. Word has length 313 [2021-12-28 03:55:38,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:38,996 INFO L470 AbstractCegarLoop]: Abstraction has 1110 states and 1407 transitions. [2021-12-28 03:55:38,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 4.96078431372549) internal successors, (506), 97 states have internal predecessors, (506), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:55:38,997 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1407 transitions. [2021-12-28 03:55:39,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2021-12-28 03:55:39,005 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:39,005 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:39,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:39,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 03:55:39,208 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:39,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1574301454, now seen corresponding path program 2 times [2021-12-28 03:55:39,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:39,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726103972] [2021-12-28 03:55:39,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:39,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2021-12-28 03:55:42,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2021-12-28 03:55:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 421 [2021-12-28 03:55:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2021-12-28 03:55:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2021-12-28 03:55:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 463 [2021-12-28 03:55:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2021-12-28 03:55:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 481 [2021-12-28 03:55:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 17616 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-28 03:55:42,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726103972] [2021-12-28 03:55:42,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726103972] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:42,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763572022] [2021-12-28 03:55:42,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 03:55:42,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:42,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:42,539 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:42,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 03:55:42,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-28 03:55:42,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 03:55:42,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 03:55:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 17616 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 17609 trivial. 0 not checked. [2021-12-28 03:55:43,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 03:55:43,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763572022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:55:43,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 03:55:43,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [102] total 105 [2021-12-28 03:55:43,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714023913] [2021-12-28 03:55:43,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:55:43,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:55:43,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:43,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:55:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4678, Invalid=6242, Unknown=0, NotChecked=0, Total=10920 [2021-12-28 03:55:43,600 INFO L87 Difference]: Start difference. First operand 1110 states and 1407 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 03:55:43,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:55:43,777 INFO L93 Difference]: Finished difference Result 3078 states and 3928 transitions. [2021-12-28 03:55:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:55:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 505 [2021-12-28 03:55:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:55:43,786 INFO L225 Difference]: With dead ends: 3078 [2021-12-28 03:55:43,786 INFO L226 Difference]: Without dead ends: 1998 [2021-12-28 03:55:43,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 520 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4682, Invalid=6448, Unknown=0, NotChecked=0, Total=11130 [2021-12-28 03:55:43,794 INFO L933 BasicCegarLoop]: 278 mSDtfsCounter, 83 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 03:55:43,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1020 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 03:55:43,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-12-28 03:55:43,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1112. [2021-12-28 03:55:43,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1051 states have (on average 1.2616555661274975) internal successors, (1326), 1052 states have internal predecessors, (1326), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-28 03:55:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1409 transitions. [2021-12-28 03:55:43,896 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1409 transitions. Word has length 505 [2021-12-28 03:55:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:55:43,897 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1409 transitions. [2021-12-28 03:55:43,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 3 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-28 03:55:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1409 transitions. [2021-12-28 03:55:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-12-28 03:55:43,904 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:55:43,905 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:55:43,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 03:55:44,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 03:55:44,119 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:55:44,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:55:44,120 INFO L85 PathProgramCache]: Analyzing trace with hash -249914232, now seen corresponding path program 1 times [2021-12-28 03:55:44,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:55:44,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038157370] [2021-12-28 03:55:44,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:44,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:55:44,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:55:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2021-12-28 03:55:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2021-12-28 03:55:47,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 421 [2021-12-28 03:55:47,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2021-12-28 03:55:47,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:55:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-28 03:55:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2021-12-28 03:55:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 463 [2021-12-28 03:55:47,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 471 [2021-12-28 03:55:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2021-12-28 03:55:47,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-28 03:55:47,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:55:47,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038157370] [2021-12-28 03:55:47,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038157370] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:55:47,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952174290] [2021-12-28 03:55:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:55:47,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:55:47,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:55:47,434 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:55:47,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 03:55:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:55:48,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 2965 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-28 03:55:48,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:55:48,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 19 proven. 17578 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-28 03:55:48,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:55:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17617 backedges. 7 proven. 17578 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-28 03:55:57,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952174290] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:55:57,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:55:57,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 97, 97] total 198 [2021-12-28 03:55:57,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353222169] [2021-12-28 03:55:57,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:55:57,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2021-12-28 03:55:57,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:55:57,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2021-12-28 03:55:57,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18544, Invalid=20462, Unknown=0, NotChecked=0, Total=39006 [2021-12-28 03:55:57,212 INFO L87 Difference]: Start difference. First operand 1112 states and 1409 transitions. Second operand has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:56:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:56:02,153 INFO L93 Difference]: Finished difference Result 2974 states and 3953 transitions. [2021-12-28 03:56:02,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-12-28 03:56:02,154 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 506 [2021-12-28 03:56:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:56:02,160 INFO L225 Difference]: With dead ends: 2974 [2021-12-28 03:56:02,160 INFO L226 Difference]: Without dead ends: 1894 [2021-12-28 03:56:02,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1131 GetRequests, 934 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=18550, Invalid=20852, Unknown=0, NotChecked=0, Total=39402 [2021-12-28 03:56:02,165 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 1839 mSDsluCounter, 1711 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 1583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 03:56:02,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1840 Valid, 1895 Invalid, 1583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 03:56:02,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1894 states. [2021-12-28 03:56:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1894 to 1880. [2021-12-28 03:56:02,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1880 states, 1819 states have (on average 1.2567344694887301) internal successors, (2286), 1820 states have internal predecessors, (2286), 37 states have call successors, (37), 19 states have call predecessors, (37), 23 states have return successors, (46), 40 states have call predecessors, (46), 36 states have call successors, (46) [2021-12-28 03:56:02,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1880 states to 1880 states and 2369 transitions. [2021-12-28 03:56:02,290 INFO L78 Accepts]: Start accepts. Automaton has 1880 states and 2369 transitions. Word has length 506 [2021-12-28 03:56:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:56:02,291 INFO L470 AbstractCegarLoop]: Abstraction has 1880 states and 2369 transitions. [2021-12-28 03:56:02,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 4.505050505050505) internal successors, (892), 193 states have internal predecessors, (892), 2 states have call successors, (31), 7 states have call predecessors, (31), 2 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:56:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1880 states and 2369 transitions. [2021-12-28 03:56:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 891 [2021-12-28 03:56:02,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:56:02,299 INFO L514 BasicCegarLoop]: trace histogram [190, 190, 190, 190, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:56:02,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 03:56:02,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:56:02,505 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:56:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:56:02,506 INFO L85 PathProgramCache]: Analyzing trace with hash 164952872, now seen corresponding path program 2 times [2021-12-28 03:56:02,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:56:02,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821080527] [2021-12-28 03:56:02,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:56:02,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:56:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat