./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.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 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:42:54,815 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:42:54,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:42:54,872 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:42:54,883 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:42:54,884 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:42:54,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:42:54,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:42:54,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:42:54,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:42:54,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:42:54,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:42:54,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:42:54,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:42:54,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:42:54,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:42:54,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:42:54,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:42:54,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:42:54,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:42:54,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:42:54,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:42:54,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:42:54,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:42:54,901 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:42:54,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:42:54,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:42:54,902 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:42:54,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:42:54,903 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:42:54,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:42:54,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:42:54,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:42:54,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:42:54,905 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:42:54,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:42:54,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:42:54,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:42:54,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:42:54,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:42:54,907 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:42:54,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:42:54,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:42:54,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:42:54,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:42:54,939 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:42:54,939 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:42:54,939 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:42:54,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:42:54,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:42:54,940 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:42:54,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:42:54,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:42:54,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:42:54,941 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:42:54,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:42:54,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:42:54,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:42:54,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:42:54,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:42:54,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:42:54,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:42:54,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:42:54,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:42:54,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:42:54,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:42:54,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:42:54,945 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:42:54,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:42:54,946 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:42:54,947 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:42:54,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:42:54,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:42:54,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 [2021-12-22 14:42:55,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:42:55,124 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:42:55,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:42:55,126 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:42:55,129 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:42:55,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2021-12-22 14:42:55,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04b73c3a/1e07901bc64a420dacdea03ad3c2e088/FLAG81ce55664 [2021-12-22 14:42:55,782 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:42:55,782 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2021-12-22 14:42:55,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04b73c3a/1e07901bc64a420dacdea03ad3c2e088/FLAG81ce55664 [2021-12-22 14:42:56,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04b73c3a/1e07901bc64a420dacdea03ad3c2e088 [2021-12-22 14:42:56,201 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:42:56,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:42:56,214 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:42:56,214 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:42:56,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:42:56,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:42:56" (1/1) ... [2021-12-22 14:42:56,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bcb6899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:56, skipping insertion in model container [2021-12-22 14:42:56,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:42:56" (1/1) ... [2021-12-22 14:42:56,222 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:42:56,303 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:42:56,714 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2021-12-22 14:42:56,715 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6709-6710] [2021-12-22 14:42:56,810 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-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i[192641,192654] [2021-12-22 14:42:57,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:42:57,309 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:42:57,417 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2021-12-22 14:42:57,419 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6709-6710] [2021-12-22 14:42:57,424 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-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i[192641,192654] [2021-12-22 14:42:57,567 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:42:57,609 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:42:57,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57 WrapperNode [2021-12-22 14:42:57,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:42:57,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:42:57,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:42:57,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:42:57,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,681 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,777 INFO L137 Inliner]: procedures = 151, calls = 1509, calls flagged for inlining = 53, calls inlined = 38, statements flattened = 2211 [2021-12-22 14:42:57,778 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:42:57,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:42:57,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:42:57,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:42:57,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,924 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:42:57,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:42:57,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:42:57,925 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:42:57,926 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:42:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:42:57,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:42:57,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:42:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:42:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-22 14:42:57,981 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-22 14:42:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2021-12-22 14:42:57,981 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2021-12-22 14:42:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:42:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:42:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 14:42:57,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 14:42:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:42:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure start_int_fifo [2021-12-22 14:42:57,982 INFO L138 BoogieDeclarations]: Found implementation of procedure start_int_fifo [2021-12-22 14:42:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure symbolic [2021-12-22 14:42:57,982 INFO L138 BoogieDeclarations]: Found implementation of procedure symbolic [2021-12-22 14:42:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:42:57,983 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:42:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-22 14:42:57,983 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-22 14:42:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:42:57,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:42:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-22 14:42:57,983 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-22 14:42:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-12-22 14:42:57,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-12-22 14:42:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 14:42:57,984 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 14:42:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure start_isoc_chain [2021-12-22 14:42:57,984 INFO L138 BoogieDeclarations]: Found implementation of procedure start_isoc_chain [2021-12-22 14:42:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:42:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:42:57,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:42:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 14:42:57,985 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 14:42:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:42:57,985 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:42:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-22 14:42:57,985 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-22 14:42:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2021-12-22 14:42:57,985 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2021-12-22 14:42:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:42:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2021-12-22 14:42:57,986 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2021-12-22 14:42:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:42:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2021-12-22 14:42:57,986 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2021-12-22 14:42:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:42:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:42:57,986 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-12-22 14:42:57,986 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-12-22 14:42:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:42:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-12-22 14:42:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-12-22 14:42:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-22 14:42:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-22 14:42:57,987 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2021-12-22 14:42:57,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2021-12-22 14:42:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure queue_control_request [2021-12-22 14:42:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_control_request [2021-12-22 14:42:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:42:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:42:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-12-22 14:42:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-12-22 14:42:57,988 INFO L130 BoogieDeclarations]: Found specification of procedure fill_isoc_urb [2021-12-22 14:42:57,988 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_isoc_urb [2021-12-22 14:42:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-12-22 14:42:57,989 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-12-22 14:42:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:42:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-22 14:42:57,989 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-22 14:42:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:42:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-22 14:42:57,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-22 14:42:57,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:42:57,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:42:58,297 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:42:58,298 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:42:58,518 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 14:43:02,027 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:43:02,040 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:43:02,040 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 14:43:02,042 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:43:02 BoogieIcfgContainer [2021-12-22 14:43:02,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:43:02,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:43:02,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:43:02,047 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:43:02,047 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:42:56" (1/3) ... [2021-12-22 14:43:02,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38240139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:43:02, skipping insertion in model container [2021-12-22 14:43:02,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (2/3) ... [2021-12-22 14:43:02,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38240139 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:43:02, skipping insertion in model container [2021-12-22 14:43:02,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:43:02" (3/3) ... [2021-12-22 14:43:02,050 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2021-12-22 14:43:02,054 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:43:02,055 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:43:02,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:43:02,113 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:43:02,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:43:02,141 INFO L276 IsEmpty]: Start isEmpty. Operand has 524 states, 389 states have (on average 1.3496143958868894) internal successors, (525), 397 states have internal predecessors, (525), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2021-12-22 14:43:02,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 14:43:02,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:02,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:02,151 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:02,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:02,155 INFO L85 PathProgramCache]: Analyzing trace with hash 453274785, now seen corresponding path program 1 times [2021-12-22 14:43:02,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:02,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970681879] [2021-12-22 14:43:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:02,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:02,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:43:02,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:02,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970681879] [2021-12-22 14:43:02,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970681879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:02,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:02,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:43:02,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281108846] [2021-12-22 14:43:02,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:02,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:43:02,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:02,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:43:02,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:02,567 INFO L87 Difference]: Start difference. First operand has 524 states, 389 states have (on average 1.3496143958868894) internal successors, (525), 397 states have internal predecessors, (525), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:43:05,625 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:06,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:06,881 INFO L93 Difference]: Finished difference Result 1128 states and 1611 transitions. [2021-12-22 14:43:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:43:06,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 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 28 [2021-12-22 14:43:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:06,894 INFO L225 Difference]: With dead ends: 1128 [2021-12-22 14:43:06,895 INFO L226 Difference]: Without dead ends: 586 [2021-12-22 14:43:06,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:06,904 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 178 mSDsluCounter, 866 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 119 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1561 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:06,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1561 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 431 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-22 14:43:06,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-12-22 14:43:06,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 547. [2021-12-22 14:43:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 411 states have (on average 1.340632603406326) internal successors, (551), 414 states have internal predecessors, (551), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2021-12-22 14:43:07,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 760 transitions. [2021-12-22 14:43:07,012 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 760 transitions. Word has length 28 [2021-12-22 14:43:07,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:07,012 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 760 transitions. [2021-12-22 14:43:07,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:43:07,013 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 760 transitions. [2021-12-22 14:43:07,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 14:43:07,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:07,016 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 14:43:07,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:43:07,016 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:07,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash -914067174, now seen corresponding path program 1 times [2021-12-22 14:43:07,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456488475] [2021-12-22 14:43:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:07,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:07,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:07,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 14:43:07,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:07,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456488475] [2021-12-22 14:43:07,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456488475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:07,200 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:07,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:43:07,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231171518] [2021-12-22 14:43:07,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:07,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:07,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:07,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:07,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:07,203 INFO L87 Difference]: Start difference. First operand 547 states and 760 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:10,520 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:12,000 INFO L93 Difference]: Finished difference Result 1119 states and 1564 transitions. [2021-12-22 14:43:12,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:43:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-22 14:43:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:12,004 INFO L225 Difference]: With dead ends: 1119 [2021-12-22 14:43:12,004 INFO L226 Difference]: Without dead ends: 585 [2021-12-22 14:43:12,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:43:12,006 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 114 mSDsluCounter, 1447 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:12,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 2122 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 544 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-12-22 14:43:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-12-22 14:43:12,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 547. [2021-12-22 14:43:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 411 states have (on average 1.338199513381995) internal successors, (550), 414 states have internal predecessors, (550), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2021-12-22 14:43:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 759 transitions. [2021-12-22 14:43:12,032 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 759 transitions. Word has length 48 [2021-12-22 14:43:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:12,033 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 759 transitions. [2021-12-22 14:43:12,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 759 transitions. [2021-12-22 14:43:12,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 14:43:12,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:12,035 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 14:43:12,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:43:12,036 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:12,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:12,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1575461788, now seen corresponding path program 1 times [2021-12-22 14:43:12,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:12,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662620943] [2021-12-22 14:43:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:12,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:12,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:12,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:12,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 14:43:12,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:12,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662620943] [2021-12-22 14:43:12,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662620943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:12,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:12,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:43:12,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348987232] [2021-12-22 14:43:12,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:12,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:43:12,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:43:12,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:12,182 INFO L87 Difference]: Start difference. First operand 547 states and 759 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:15,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:16,478 INFO L93 Difference]: Finished difference Result 1245 states and 1753 transitions. [2021-12-22 14:43:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:43:16,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-22 14:43:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:16,482 INFO L225 Difference]: With dead ends: 1245 [2021-12-22 14:43:16,483 INFO L226 Difference]: Without dead ends: 714 [2021-12-22 14:43:16,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:16,485 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 224 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:16,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 1787 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 459 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-22 14:43:16,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-12-22 14:43:16,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 554. [2021-12-22 14:43:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 418 states have (on average 1.3397129186602872) internal successors, (560), 421 states have internal predecessors, (560), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2021-12-22 14:43:16,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 769 transitions. [2021-12-22 14:43:16,526 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 769 transitions. Word has length 48 [2021-12-22 14:43:16,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:16,527 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 769 transitions. [2021-12-22 14:43:16,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:16,527 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 769 transitions. [2021-12-22 14:43:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 14:43:16,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:16,533 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 14:43:16,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:43:16,533 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:16,534 INFO L85 PathProgramCache]: Analyzing trace with hash -809569934, now seen corresponding path program 1 times [2021-12-22 14:43:16,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:16,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070784712] [2021-12-22 14:43:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:16,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:16,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:16,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:16,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:16,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 14:43:16,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:16,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070784712] [2021-12-22 14:43:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070784712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:16,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:43:16,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131492343] [2021-12-22 14:43:16,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:16,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:43:16,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:16,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:43:16,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:16,665 INFO L87 Difference]: Start difference. First operand 554 states and 769 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:19,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:21,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:21,362 INFO L93 Difference]: Finished difference Result 1292 states and 1826 transitions. [2021-12-22 14:43:21,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:43:21,363 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2021-12-22 14:43:21,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:21,366 INFO L225 Difference]: With dead ends: 1292 [2021-12-22 14:43:21,366 INFO L226 Difference]: Without dead ends: 754 [2021-12-22 14:43:21,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:21,369 INFO L933 BasicCegarLoop]: 821 mSDtfsCounter, 271 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 108 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:21,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 1779 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 464 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-12-22 14:43:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-22 14:43:21,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 594. [2021-12-22 14:43:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 456 states have (on average 1.3530701754385965) internal successors, (617), 459 states have internal predecessors, (617), 107 states have call successors, (107), 31 states have call predecessors, (107), 30 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2021-12-22 14:43:21,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2021-12-22 14:43:21,391 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 54 [2021-12-22 14:43:21,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:21,391 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2021-12-22 14:43:21,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:21,392 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2021-12-22 14:43:21,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 14:43:21,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:21,393 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 14:43:21,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:43:21,393 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:21,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:21,394 INFO L85 PathProgramCache]: Analyzing trace with hash -819742023, now seen corresponding path program 1 times [2021-12-22 14:43:21,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:21,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616012678] [2021-12-22 14:43:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:21,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:21,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:21,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:21,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:43:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 14:43:21,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:21,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616012678] [2021-12-22 14:43:21,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616012678] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:21,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:21,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:43:21,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404617816] [2021-12-22 14:43:21,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:21,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:21,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:21,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:21,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:21,561 INFO L87 Difference]: Start difference. First operand 594 states and 830 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 14:43:25,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:27,163 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:29,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:29,620 INFO L93 Difference]: Finished difference Result 1350 states and 1885 transitions. [2021-12-22 14:43:29,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:43:29,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-22 14:43:29,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:29,623 INFO L225 Difference]: With dead ends: 1350 [2021-12-22 14:43:29,623 INFO L226 Difference]: Without dead ends: 772 [2021-12-22 14:43:29,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:43:29,625 INFO L933 BasicCegarLoop]: 802 mSDtfsCounter, 780 mSDsluCounter, 818 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 273 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1620 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:29,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1620 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 764 Invalid, 2 Unknown, 0 Unchecked, 8.0s Time] [2021-12-22 14:43:29,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-12-22 14:43:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 719. [2021-12-22 14:43:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 550 states have (on average 1.3509090909090908) internal successors, (743), 554 states have internal predecessors, (743), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-22 14:43:29,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 996 transitions. [2021-12-22 14:43:29,645 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 996 transitions. Word has length 68 [2021-12-22 14:43:29,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:29,645 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 996 transitions. [2021-12-22 14:43:29,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-22 14:43:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 996 transitions. [2021-12-22 14:43:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 14:43:29,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:29,648 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:29,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:43:29,648 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash -504486881, now seen corresponding path program 1 times [2021-12-22 14:43:29,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:29,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942298540] [2021-12-22 14:43:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:29,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:29,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:29,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:29,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 14:43:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 14:43:29,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:29,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942298540] [2021-12-22 14:43:29,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942298540] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:29,776 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:29,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:43:29,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098723857] [2021-12-22 14:43:29,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:29,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:29,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:29,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:29,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:29,779 INFO L87 Difference]: Start difference. First operand 719 states and 996 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:33,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:35,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:39,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:41,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:41,139 INFO L93 Difference]: Finished difference Result 1816 states and 2582 transitions. [2021-12-22 14:43:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:43:41,139 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-12-22 14:43:41,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:41,143 INFO L225 Difference]: With dead ends: 1816 [2021-12-22 14:43:41,143 INFO L226 Difference]: Without dead ends: 1113 [2021-12-22 14:43:41,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:43:41,145 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 499 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 345 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:41,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1969 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 862 Invalid, 4 Unknown, 0 Unchecked, 11.3s Time] [2021-12-22 14:43:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-12-22 14:43:41,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 721. [2021-12-22 14:43:41,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 552 states have (on average 1.3496376811594204) internal successors, (745), 556 states have internal predecessors, (745), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-22 14:43:41,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 998 transitions. [2021-12-22 14:43:41,166 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 998 transitions. Word has length 77 [2021-12-22 14:43:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:41,166 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 998 transitions. [2021-12-22 14:43:41,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 998 transitions. [2021-12-22 14:43:41,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-22 14:43:41,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:41,168 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 14:43:41,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 14:43:41,168 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:41,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1854822344, now seen corresponding path program 1 times [2021-12-22 14:43:41,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:41,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835625635] [2021-12-22 14:43:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:41,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:41,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:41,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:41,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-22 14:43:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 14:43:41,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:41,305 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835625635] [2021-12-22 14:43:41,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835625635] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:41,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:41,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:43:41,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746573301] [2021-12-22 14:43:41,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:41,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:43:41,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:41,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:43:41,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:43:41,307 INFO L87 Difference]: Start difference. First operand 721 states and 998 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 14:43:45,665 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:47,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:50,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:52,130 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:55,955 INFO L93 Difference]: Finished difference Result 2001 states and 2790 transitions. [2021-12-22 14:43:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:43:55,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 82 [2021-12-22 14:43:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:55,960 INFO L225 Difference]: With dead ends: 2001 [2021-12-22 14:43:55,960 INFO L226 Difference]: Without dead ends: 1296 [2021-12-22 14:43:55,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:43:55,963 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 829 mSDsluCounter, 2568 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 291 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 3792 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:55,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 3792 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1435 Invalid, 4 Unknown, 0 Unchecked, 14.5s Time] [2021-12-22 14:43:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-12-22 14:43:55,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 723. [2021-12-22 14:43:55,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 554 states have (on average 1.348375451263538) internal successors, (747), 558 states have internal predecessors, (747), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-22 14:43:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1000 transitions. [2021-12-22 14:43:55,988 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1000 transitions. Word has length 82 [2021-12-22 14:43:55,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:55,989 INFO L470 AbstractCegarLoop]: Abstraction has 723 states and 1000 transitions. [2021-12-22 14:43:55,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-22 14:43:55,989 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1000 transitions. [2021-12-22 14:43:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-22 14:43:55,990 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:55,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:55,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 14:43:55,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:55,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:55,991 INFO L85 PathProgramCache]: Analyzing trace with hash 344842123, now seen corresponding path program 1 times [2021-12-22 14:43:55,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:55,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26753040] [2021-12-22 14:43:55,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:55,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:56,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:56,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:56,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-22 14:43:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:56,117 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 14:43:56,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:56,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26753040] [2021-12-22 14:43:56,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26753040] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:56,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:56,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:43:56,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014205558] [2021-12-22 14:43:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:56,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:56,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:56,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:56,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:56,119 INFO L87 Difference]: Start difference. First operand 723 states and 1000 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:59,900 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:44:01,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:44:05,835 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:44:07,872 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:44:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:44:07,965 INFO L93 Difference]: Finished difference Result 1842 states and 2614 transitions. [2021-12-22 14:44:07,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:44:07,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 82 [2021-12-22 14:44:07,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:44:07,969 INFO L225 Difference]: With dead ends: 1842 [2021-12-22 14:44:07,970 INFO L226 Difference]: Without dead ends: 1135 [2021-12-22 14:44:07,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:44:07,972 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 505 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 221 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 2638 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:44:07,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 2638 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1005 Invalid, 4 Unknown, 0 Unchecked, 11.8s Time] [2021-12-22 14:44:07,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-12-22 14:44:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 775. [2021-12-22 14:44:07,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 606 states have (on average 1.3646864686468647) internal successors, (827), 610 states have internal predecessors, (827), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-22 14:44:07,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1080 transitions. [2021-12-22 14:44:07,999 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 1080 transitions. Word has length 82 [2021-12-22 14:44:07,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:44:07,999 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 1080 transitions. [2021-12-22 14:44:07,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:44:08,000 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 1080 transitions. [2021-12-22 14:44:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-22 14:44:08,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:44:08,001 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:44:08,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 14:44:08,001 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:44:08,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:44:08,001 INFO L85 PathProgramCache]: Analyzing trace with hash -676226231, now seen corresponding path program 1 times [2021-12-22 14:44:08,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:44:08,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762771176] [2021-12-22 14:44:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:44:08,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:44:08,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat