./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.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 6b3de547936c1646f60b80d97a1625774e2d4a48db257d02bb1b2f3a0d43e91e --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:45:44,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:45:44,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:45:44,816 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:45:44,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:45:44,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:45:44,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:45:44,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:45:44,820 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:45:44,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:45:44,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:45:44,822 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:45:44,822 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:45:44,822 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:45:44,823 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:45:44,824 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:45:44,825 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:45:44,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:45:44,826 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:45:44,827 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:45:44,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:45:44,829 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:45:44,830 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:45:44,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:45:44,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:45:44,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:45:44,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:45:44,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:45:44,833 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:45:44,834 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:45:44,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:45:44,834 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:45:44,835 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:45:44,835 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:45:44,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:45:44,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:45:44,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:45:44,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:45:44,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:45:44,838 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:45:44,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:45:44,841 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:45:44,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:45:44,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:45:44,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:45:44,866 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:45:44,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:45:44,875 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:45:44,876 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:45:44,876 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:45:44,876 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:45:44,876 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:45:44,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:45:44,877 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:45:44,877 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:45:44,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:45:44,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:45:44,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:45:44,877 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:45:44,878 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:45:44,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:45:44,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:45:44,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:45:44,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:45:44,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:45:44,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:45:44,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:45:44,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:45:44,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:45:44,879 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:45:44,879 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:45:44,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:45:44,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:45:44,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b3de547936c1646f60b80d97a1625774e2d4a48db257d02bb1b2f3a0d43e91e [2021-12-14 17:45:45,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:45:45,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:45:45,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:45:45,101 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:45:45,102 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:45:45,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-12-14 17:45:45,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d27ec7496/434c5522514b4e1ea8a48497046cf89f/FLAGed43914e8 [2021-12-14 17:45:45,806 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:45:45,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-12-14 17:45:45,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d27ec7496/434c5522514b4e1ea8a48497046cf89f/FLAGed43914e8 [2021-12-14 17:45:46,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d27ec7496/434c5522514b4e1ea8a48497046cf89f [2021-12-14 17:45:46,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:45:46,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:45:46,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:45:46,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:45:46,194 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:45:46,195 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:45:46" (1/1) ... [2021-12-14 17:45:46,196 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6274c57f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:46, skipping insertion in model container [2021-12-14 17:45:46,196 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:45:46" (1/1) ... [2021-12-14 17:45:46,201 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:45:46,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:45:46,805 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2021-12-14 17:45:47,204 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:45:47,223 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:45:47,324 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i[154748,154761] [2021-12-14 17:45:47,495 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:45:47,536 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:45:47,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47 WrapperNode [2021-12-14 17:45:47,538 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:45:47,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:45:47,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:45:47,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:45:47,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,621 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,717 INFO L137 Inliner]: procedures = 174, calls = 1111, calls flagged for inlining = 78, calls inlined = 75, statements flattened = 3508 [2021-12-14 17:45:47,718 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:45:47,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:45:47,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:45:47,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:45:47,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,751 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,751 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,820 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,880 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:45:47,881 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:45:47,881 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:45:47,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:45:47,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (1/1) ... [2021-12-14 17:45:47,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:45:47,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:45:47,925 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) [2021-12-14 17:45:47,931 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 [2021-12-14 17:45:47,953 INFO L130 BoogieDeclarations]: Found specification of procedure dlci_to_q922 [2021-12-14 17:45:47,954 INFO L138 BoogieDeclarations]: Found implementation of procedure dlci_to_q922 [2021-12-14 17:45:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:45:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:45:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:45:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 17:45:47,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 17:45:47,954 INFO L130 BoogieDeclarations]: Found specification of procedure dev_queue_xmit [2021-12-14 17:45:47,954 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_queue_xmit [2021-12-14 17:45:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:45:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure state [2021-12-14 17:45:47,955 INFO L138 BoogieDeclarations]: Found implementation of procedure state [2021-12-14 17:45:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure fr_hard_header [2021-12-14 17:45:47,955 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_hard_header [2021-12-14 17:45:47,955 INFO L130 BoogieDeclarations]: Found specification of procedure find_pvc [2021-12-14 17:45:47,955 INFO L138 BoogieDeclarations]: Found implementation of procedure find_pvc [2021-12-14 17:45:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure dev_to_hdlc [2021-12-14 17:45:47,956 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_to_hdlc [2021-12-14 17:45:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-12-14 17:45:47,956 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-12-14 17:45:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:45:47,956 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:45:47,956 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-14 17:45:47,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-14 17:45:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-12-14 17:45:47,957 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-12-14 17:45:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure pvc_carrier [2021-12-14 17:45:47,957 INFO L138 BoogieDeclarations]: Found implementation of procedure pvc_carrier [2021-12-14 17:45:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:45:47,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:45:47,957 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_disconnect_2 [2021-12-14 17:45:47,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_disconnect_2 [2021-12-14 17:45:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure dev_close [2021-12-14 17:45:47,958 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_close [2021-12-14 17:45:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-14 17:45:47,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-14 17:45:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 17:45:47,958 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 17:45:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure fr_rx [2021-12-14 17:45:47,959 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_rx [2021-12-14 17:45:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure pvc_ioctl [2021-12-14 17:45:47,959 INFO L138 BoogieDeclarations]: Found implementation of procedure pvc_ioctl [2021-12-14 17:45:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:45:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-12-14 17:45:47,959 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-12-14 17:45:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:45:47,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:45:47,960 INFO L130 BoogieDeclarations]: Found specification of procedure fr_ioctl [2021-12-14 17:45:47,960 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_ioctl [2021-12-14 17:45:47,960 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-12-14 17:45:47,960 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-12-14 17:45:47,960 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-12-14 17:45:47,961 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-12-14 17:45:47,961 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_on [2021-12-14 17:45:47,961 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_on [2021-12-14 17:45:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:45:47,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:45:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_netdev_mqs [2021-12-14 17:45:47,963 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_netdev_mqs [2021-12-14 17:45:47,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-14 17:45:47,964 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-14 17:45:47,964 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:45:47,964 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:45:47,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:45:47,964 INFO L130 BoogieDeclarations]: Found specification of procedure hdlc_change_mtu [2021-12-14 17:45:47,965 INFO L138 BoogieDeclarations]: Found implementation of procedure hdlc_change_mtu [2021-12-14 17:45:47,965 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-12-14 17:45:47,965 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-12-14 17:45:47,965 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-12-14 17:45:47,965 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-12-14 17:45:47,965 INFO L130 BoogieDeclarations]: Found specification of procedure fr_log_dlci_active [2021-12-14 17:45:47,965 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_log_dlci_active [2021-12-14 17:45:47,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:45:47,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:45:47,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:45:47,966 INFO L130 BoogieDeclarations]: Found specification of procedure delete_unused_pvcs [2021-12-14 17:45:47,966 INFO L138 BoogieDeclarations]: Found implementation of procedure delete_unused_pvcs [2021-12-14 17:45:47,967 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-12-14 17:45:47,967 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-12-14 17:45:47,967 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-12-14 17:45:47,967 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-12-14 17:45:47,967 INFO L130 BoogieDeclarations]: Found specification of procedure pvc_is_used [2021-12-14 17:45:47,968 INFO L138 BoogieDeclarations]: Found implementation of procedure pvc_is_used [2021-12-14 17:45:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:45:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-14 17:45:47,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-14 17:45:47,968 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-12-14 17:45:47,968 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-12-14 17:45:47,969 INFO L130 BoogieDeclarations]: Found specification of procedure fr_set_link_state [2021-12-14 17:45:47,969 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_set_link_state [2021-12-14 17:45:47,969 INFO L130 BoogieDeclarations]: Found specification of procedure fr_lmi_send [2021-12-14 17:45:47,969 INFO L138 BoogieDeclarations]: Found implementation of procedure fr_lmi_send [2021-12-14 17:45:47,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:45:47,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:45:47,970 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-14 17:45:47,970 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-14 17:45:47,970 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-12-14 17:45:47,971 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-12-14 17:45:47,971 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-14 17:45:47,971 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-14 17:45:47,972 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-12-14 17:45:47,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-12-14 17:45:47,972 INFO L130 BoogieDeclarations]: Found specification of procedure get_dev_p [2021-12-14 17:45:47,972 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dev_p [2021-12-14 17:45:47,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:45:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure linkwatch_fire_event [2021-12-14 17:45:47,973 INFO L138 BoogieDeclarations]: Found implementation of procedure linkwatch_fire_event [2021-12-14 17:45:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure add_pvc [2021-12-14 17:45:47,973 INFO L138 BoogieDeclarations]: Found implementation of procedure add_pvc [2021-12-14 17:45:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdevice [2021-12-14 17:45:47,973 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdevice [2021-12-14 17:45:47,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:45:47,974 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-14 17:45:47,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-14 17:45:47,974 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-14 17:45:47,974 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-14 17:45:47,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:45:47,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:45:48,491 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:45:48,495 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:45:48,665 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 17:45:50,210 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:45:50,227 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:45:50,227 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 17:45:50,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:45:50 BoogieIcfgContainer [2021-12-14 17:45:50,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:45:50,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:45:50,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:45:50,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:45:50,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:45:46" (1/3) ... [2021-12-14 17:45:50,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb9ffdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:45:50, skipping insertion in model container [2021-12-14 17:45:50,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:47" (2/3) ... [2021-12-14 17:45:50,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fb9ffdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:45:50, skipping insertion in model container [2021-12-14 17:45:50,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:45:50" (3/3) ... [2021-12-14 17:45:50,242 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wan--hdlc_fr.ko-entry_point.cil.out.i [2021-12-14 17:45:50,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:45:50,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:45:50,289 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:45:50,295 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 [2021-12-14 17:45:50,296 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:45:50,330 INFO L276 IsEmpty]: Start isEmpty. Operand has 1162 states, 845 states have (on average 1.3775147928994083) internal successors, (1164), 861 states have internal predecessors, (1164), 265 states have call successors, (265), 51 states have call predecessors, (265), 50 states have return successors, (261), 260 states have call predecessors, (261), 261 states have call successors, (261) [2021-12-14 17:45:50,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 17:45:50,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:50,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:50,336 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:50,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:50,339 INFO L85 PathProgramCache]: Analyzing trace with hash 16503480, now seen corresponding path program 1 times [2021-12-14 17:45:50,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:50,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695637773] [2021-12-14 17:45:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:50,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:50,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:50,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 17:45:50,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:50,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695637773] [2021-12-14 17:45:50,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695637773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:50,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:50,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:45:50,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426233904] [2021-12-14 17:45:50,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:50,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:45:50,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:50,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:45:50,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:45:50,795 INFO L87 Difference]: Start difference. First operand has 1162 states, 845 states have (on average 1.3775147928994083) internal successors, (1164), 861 states have internal predecessors, (1164), 265 states have call successors, (265), 51 states have call predecessors, (265), 50 states have return successors, (261), 260 states have call predecessors, (261), 261 states have call successors, (261) Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 17:45:53,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:53,910 INFO L93 Difference]: Finished difference Result 3724 states and 5603 transitions. [2021-12-14 17:45:53,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:45:53,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2021-12-14 17:45:53,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:53,933 INFO L225 Difference]: With dead ends: 3724 [2021-12-14 17:45:53,937 INFO L226 Difference]: Without dead ends: 2551 [2021-12-14 17:45:53,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:45:53,967 INFO L933 BasicCegarLoop]: 1890 mSDtfsCounter, 2215 mSDsluCounter, 2122 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2434 SdHoareTripleChecker+Valid, 4012 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:53,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2434 Valid, 4012 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-14 17:45:53,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2551 states. [2021-12-14 17:45:54,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2551 to 2273. [2021-12-14 17:45:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2273 states, 1659 states have (on average 1.3664858348402653) internal successors, (2267), 1679 states have internal predecessors, (2267), 515 states have call successors, (515), 99 states have call predecessors, (515), 98 states have return successors, (514), 512 states have call predecessors, (514), 514 states have call successors, (514) [2021-12-14 17:45:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2273 states to 2273 states and 3296 transitions. [2021-12-14 17:45:54,162 INFO L78 Accepts]: Start accepts. Automaton has 2273 states and 3296 transitions. Word has length 41 [2021-12-14 17:45:54,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:54,163 INFO L470 AbstractCegarLoop]: Abstraction has 2273 states and 3296 transitions. [2021-12-14 17:45:54,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 17:45:54,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2273 states and 3296 transitions. [2021-12-14 17:45:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-14 17:45:54,169 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:54,169 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:54,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:45:54,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:54,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash 202884705, now seen corresponding path program 1 times [2021-12-14 17:45:54,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:54,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251314845] [2021-12-14 17:45:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:54,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:54,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:54,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:54,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:54,296 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-14 17:45:54,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:54,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251314845] [2021-12-14 17:45:54,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251314845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:54,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:54,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:45:54,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389012558] [2021-12-14 17:45:54,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:54,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:45:54,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:54,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:45:54,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:45:54,300 INFO L87 Difference]: Start difference. First operand 2273 states and 3296 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 17:45:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:56,699 INFO L93 Difference]: Finished difference Result 4811 states and 7034 transitions. [2021-12-14 17:45:56,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:45:56,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-14 17:45:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:56,713 INFO L225 Difference]: With dead ends: 4811 [2021-12-14 17:45:56,714 INFO L226 Difference]: Without dead ends: 2550 [2021-12-14 17:45:56,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:56,724 INFO L933 BasicCegarLoop]: 2045 mSDtfsCounter, 2220 mSDsluCounter, 2389 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 654 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2401 SdHoareTripleChecker+Valid, 4434 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 654 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:56,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2401 Valid, 4434 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [654 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-14 17:45:56,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2550 states. [2021-12-14 17:45:56,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2550 to 2272. [2021-12-14 17:45:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 1658 states have (on average 1.3648974668275031) internal successors, (2263), 1678 states have internal predecessors, (2263), 515 states have call successors, (515), 99 states have call predecessors, (515), 98 states have return successors, (514), 512 states have call predecessors, (514), 514 states have call successors, (514) [2021-12-14 17:45:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 3292 transitions. [2021-12-14 17:45:56,806 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 3292 transitions. Word has length 44 [2021-12-14 17:45:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:56,806 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 3292 transitions. [2021-12-14 17:45:56,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 17:45:56,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 3292 transitions. [2021-12-14 17:45:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-14 17:45:56,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:56,816 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-12-14 17:45:56,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:45:56,817 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:56,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash -94841370, now seen corresponding path program 1 times [2021-12-14 17:45:56,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:56,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494575519] [2021-12-14 17:45:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:56,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:56,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:45:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-14 17:45:56,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:56,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494575519] [2021-12-14 17:45:56,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494575519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:56,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:56,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:45:56,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207438207] [2021-12-14 17:45:56,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:56,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:45:56,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:56,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:45:56,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:45:56,953 INFO L87 Difference]: Start difference. First operand 2272 states and 3292 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:46:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:00,179 INFO L93 Difference]: Finished difference Result 7337 states and 10822 transitions. [2021-12-14 17:46:00,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:46:00,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 66 [2021-12-14 17:46:00,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:00,203 INFO L225 Difference]: With dead ends: 7337 [2021-12-14 17:46:00,204 INFO L226 Difference]: Without dead ends: 5072 [2021-12-14 17:46:00,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:46:00,220 INFO L933 BasicCegarLoop]: 1887 mSDtfsCounter, 2199 mSDsluCounter, 5516 mSDsCounter, 0 mSdLazyCounter, 2079 mSolverCounterSat, 757 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2418 SdHoareTripleChecker+Valid, 7403 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 757 IncrementalHoareTripleChecker+Valid, 2079 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:00,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2418 Valid, 7403 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [757 Valid, 2079 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-14 17:46:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-12-14 17:46:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4554. [2021-12-14 17:46:00,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 3324 states have (on average 1.3655234657039712) internal successors, (4539), 3368 states have internal predecessors, (4539), 1025 states have call successors, (1025), 197 states have call predecessors, (1025), 204 states have return successors, (1084), 1024 states have call predecessors, (1084), 1024 states have call successors, (1084) [2021-12-14 17:46:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 6648 transitions. [2021-12-14 17:46:00,427 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 6648 transitions. Word has length 66 [2021-12-14 17:46:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:00,429 INFO L470 AbstractCegarLoop]: Abstraction has 4554 states and 6648 transitions. [2021-12-14 17:46:00,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-14 17:46:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 6648 transitions. [2021-12-14 17:46:00,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-14 17:46:00,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:00,439 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:46:00,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:46:00,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash -248182647, now seen corresponding path program 1 times [2021-12-14 17:46:00,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:00,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939274169] [2021-12-14 17:46:00,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:00,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:00,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:46:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:46:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:46:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:46:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-14 17:46:00,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:00,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939274169] [2021-12-14 17:46:00,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939274169] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:00,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:00,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:46:00,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362523115] [2021-12-14 17:46:00,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:00,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:46:00,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:00,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:46:00,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:46:00,612 INFO L87 Difference]: Start difference. First operand 4554 states and 6648 transitions. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:46:06,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:06,548 INFO L93 Difference]: Finished difference Result 15534 states and 23138 transitions. [2021-12-14 17:46:06,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:46:06,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 103 [2021-12-14 17:46:06,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:06,636 INFO L225 Difference]: With dead ends: 15534 [2021-12-14 17:46:06,636 INFO L226 Difference]: Without dead ends: 10992 [2021-12-14 17:46:06,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:46:06,659 INFO L933 BasicCegarLoop]: 2705 mSDtfsCounter, 2578 mSDsluCounter, 2901 mSDsCounter, 0 mSdLazyCounter, 3478 mSolverCounterSat, 1254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2787 SdHoareTripleChecker+Valid, 5606 SdHoareTripleChecker+Invalid, 4732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1254 IncrementalHoareTripleChecker+Valid, 3478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:06,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2787 Valid, 5606 Invalid, 4732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1254 Valid, 3478 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-14 17:46:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10992 states. [2021-12-14 17:46:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10992 to 9020. [2021-12-14 17:46:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9020 states, 6596 states have (on average 1.3635536688902365) internal successors, (8994), 6698 states have internal predecessors, (8994), 2007 states have call successors, (2007), 389 states have call predecessors, (2007), 416 states have return successors, (2153), 2004 states have call predecessors, (2153), 2006 states have call successors, (2153) [2021-12-14 17:46:07,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9020 states to 9020 states and 13154 transitions. [2021-12-14 17:46:07,112 INFO L78 Accepts]: Start accepts. Automaton has 9020 states and 13154 transitions. Word has length 103 [2021-12-14 17:46:07,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:07,112 INFO L470 AbstractCegarLoop]: Abstraction has 9020 states and 13154 transitions. [2021-12-14 17:46:07,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:46:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 9020 states and 13154 transitions. [2021-12-14 17:46:07,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-14 17:46:07,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:07,124 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:46:07,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:46:07,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1651725426, now seen corresponding path program 1 times [2021-12-14 17:46:07,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:07,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392695270] [2021-12-14 17:46:07,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:07,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:07,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:46:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:46:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-14 17:46:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-14 17:46:07,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-14 17:46:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-14 17:46:07,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:07,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392695270] [2021-12-14 17:46:07,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392695270] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:07,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:07,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:46:07,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942903755] [2021-12-14 17:46:07,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:07,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:46:07,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:07,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:46:07,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:46:07,241 INFO L87 Difference]: Start difference. First operand 9020 states and 13154 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:46:12,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:12,102 INFO L93 Difference]: Finished difference Result 19708 states and 29148 transitions. [2021-12-14 17:46:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:46:12,103 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2021-12-14 17:46:12,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:12,150 INFO L225 Difference]: With dead ends: 19708 [2021-12-14 17:46:12,151 INFO L226 Difference]: Without dead ends: 10700 [2021-12-14 17:46:12,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:46:12,184 INFO L933 BasicCegarLoop]: 1851 mSDtfsCounter, 3137 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 2824 mSolverCounterSat, 1626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3345 SdHoareTripleChecker+Valid, 4094 SdHoareTripleChecker+Invalid, 4450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1626 IncrementalHoareTripleChecker+Valid, 2824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:12,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3345 Valid, 4094 Invalid, 4450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1626 Valid, 2824 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-14 17:46:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10700 states. [2021-12-14 17:46:12,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10700 to 8736. [2021-12-14 17:46:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8736 states, 6368 states have (on average 1.3613379396984924) internal successors, (8669), 6472 states have internal predecessors, (8669), 1957 states have call successors, (1957), 383 states have call predecessors, (1957), 410 states have return successors, (2098), 1952 states have call predecessors, (2098), 1956 states have call successors, (2098) [2021-12-14 17:46:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8736 states to 8736 states and 12724 transitions. [2021-12-14 17:46:12,578 INFO L78 Accepts]: Start accepts. Automaton has 8736 states and 12724 transitions. Word has length 95 [2021-12-14 17:46:12,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:12,579 INFO L470 AbstractCegarLoop]: Abstraction has 8736 states and 12724 transitions. [2021-12-14 17:46:12,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 3 states have internal predecessors, (59), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:46:12,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8736 states and 12724 transitions. [2021-12-14 17:46:12,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-12-14 17:46:12,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:12,590 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:46:12,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:46:12,591 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:12,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:12,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1725212051, now seen corresponding path program 1 times [2021-12-14 17:46:12,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:12,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786306500] [2021-12-14 17:46:12,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:12,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:46:12,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:46:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:12,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:46:12,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-14 17:46:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:12,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-12-14 17:46:12,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:12,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786306500] [2021-12-14 17:46:12,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786306500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:12,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:12,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:46:12,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647819545] [2021-12-14 17:46:12,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:12,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:46:12,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:12,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:46:12,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:46:12,778 INFO L87 Difference]: Start difference. First operand 8736 states and 12724 transitions. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:46:18,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:18,855 INFO L93 Difference]: Finished difference Result 19998 states and 29670 transitions. [2021-12-14 17:46:18,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:46:18,855 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 117 [2021-12-14 17:46:18,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:18,901 INFO L225 Difference]: With dead ends: 19998 [2021-12-14 17:46:18,901 INFO L226 Difference]: Without dead ends: 13371 [2021-12-14 17:46:18,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:46:18,923 INFO L933 BasicCegarLoop]: 2872 mSDtfsCounter, 2477 mSDsluCounter, 3082 mSDsCounter, 0 mSdLazyCounter, 3629 mSolverCounterSat, 1205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2690 SdHoareTripleChecker+Valid, 5954 SdHoareTripleChecker+Invalid, 4834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1205 IncrementalHoareTripleChecker+Valid, 3629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:18,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2690 Valid, 5954 Invalid, 4834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1205 Valid, 3629 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-14 17:46:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13371 states. [2021-12-14 17:46:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13371 to 10917. [2021-12-14 17:46:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10917 states, 7963 states have (on average 1.361170413160869) internal successors, (10839), 8094 states have internal predecessors, (10839), 2438 states have call successors, (2438), 481 states have call predecessors, (2438), 515 states have return successors, (2613), 2431 states have call predecessors, (2613), 2437 states have call successors, (2613) [2021-12-14 17:46:19,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10917 states to 10917 states and 15890 transitions. [2021-12-14 17:46:19,377 INFO L78 Accepts]: Start accepts. Automaton has 10917 states and 15890 transitions. Word has length 117 [2021-12-14 17:46:19,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:19,377 INFO L470 AbstractCegarLoop]: Abstraction has 10917 states and 15890 transitions. [2021-12-14 17:46:19,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 3 states have internal predecessors, (83), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:46:19,377 INFO L276 IsEmpty]: Start isEmpty. Operand 10917 states and 15890 transitions. [2021-12-14 17:46:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-14 17:46:19,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:19,441 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:46:19,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:46:19,441 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:19,442 INFO L85 PathProgramCache]: Analyzing trace with hash -159171181, now seen corresponding path program 1 times [2021-12-14 17:46:19,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:19,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634279017] [2021-12-14 17:46:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:19,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:19,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:46:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:46:19,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:46:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2021-12-14 17:46:19,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:19,570 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-14 17:46:19,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:19,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634279017] [2021-12-14 17:46:19,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634279017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:19,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:19,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:46:19,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353325029] [2021-12-14 17:46:19,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:19,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:46:19,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:19,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:46:19,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:46:19,573 INFO L87 Difference]: Start difference. First operand 10917 states and 15890 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:46:26,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:26,311 INFO L93 Difference]: Finished difference Result 27579 states and 40872 transitions. [2021-12-14 17:46:26,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:46:26,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 122 [2021-12-14 17:46:26,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:26,386 INFO L225 Difference]: With dead ends: 27579 [2021-12-14 17:46:26,386 INFO L226 Difference]: Without dead ends: 18771 [2021-12-14 17:46:26,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:46:26,424 INFO L933 BasicCegarLoop]: 2910 mSDtfsCounter, 2587 mSDsluCounter, 5294 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 1418 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2729 SdHoareTripleChecker+Valid, 8204 SdHoareTripleChecker+Invalid, 6297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1418 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:26,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2729 Valid, 8204 Invalid, 6297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1418 Valid, 4879 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2021-12-14 17:46:26,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18771 states. [2021-12-14 17:46:27,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18771 to 10921. [2021-12-14 17:46:27,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10921 states, 7967 states have (on average 1.3609890799548137) internal successors, (10843), 8098 states have internal predecessors, (10843), 2438 states have call successors, (2438), 481 states have call predecessors, (2438), 515 states have return successors, (2613), 2431 states have call predecessors, (2613), 2437 states have call successors, (2613) [2021-12-14 17:46:27,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10921 states to 10921 states and 15894 transitions. [2021-12-14 17:46:27,056 INFO L78 Accepts]: Start accepts. Automaton has 10921 states and 15894 transitions. Word has length 122 [2021-12-14 17:46:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:27,057 INFO L470 AbstractCegarLoop]: Abstraction has 10921 states and 15894 transitions. [2021-12-14 17:46:27,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 4 states have internal predecessors, (78), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-14 17:46:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 10921 states and 15894 transitions. [2021-12-14 17:46:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-12-14 17:46:27,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:27,077 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:46:27,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:46:27,078 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:27,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:27,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1619034978, now seen corresponding path program 1 times [2021-12-14 17:46:27,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:27,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372303832] [2021-12-14 17:46:27,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:27,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:46:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:46:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:46:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:46:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-14 17:46:27,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:27,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372303832] [2021-12-14 17:46:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372303832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:27,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:27,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:46:27,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124946825] [2021-12-14 17:46:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:46:27,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:46:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:46:27,214 INFO L87 Difference]: Start difference. First operand 10921 states and 15894 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-14 17:46:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:30,739 INFO L93 Difference]: Finished difference Result 19044 states and 28439 transitions. [2021-12-14 17:46:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 17:46:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 132 [2021-12-14 17:46:30,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:30,791 INFO L225 Difference]: With dead ends: 19044 [2021-12-14 17:46:30,791 INFO L226 Difference]: Without dead ends: 13373 [2021-12-14 17:46:30,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:46:30,818 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1010 mSDsluCounter, 2265 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 3806 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:30,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 3806 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-14 17:46:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13373 states. [2021-12-14 17:46:31,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13373 to 10931. [2021-12-14 17:46:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10931 states, 7977 states have (on average 1.3605365425598597) internal successors, (10853), 8108 states have internal predecessors, (10853), 2438 states have call successors, (2438), 481 states have call predecessors, (2438), 515 states have return successors, (2613), 2431 states have call predecessors, (2613), 2437 states have call successors, (2613) [2021-12-14 17:46:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10931 states to 10931 states and 15904 transitions. [2021-12-14 17:46:31,324 INFO L78 Accepts]: Start accepts. Automaton has 10931 states and 15904 transitions. Word has length 132 [2021-12-14 17:46:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:31,324 INFO L470 AbstractCegarLoop]: Abstraction has 10931 states and 15904 transitions. [2021-12-14 17:46:31,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2021-12-14 17:46:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 10931 states and 15904 transitions. [2021-12-14 17:46:31,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-14 17:46:31,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:31,339 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:46:31,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:46:31,340 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:31,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:31,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1510120385, now seen corresponding path program 1 times [2021-12-14 17:46:31,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:31,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461752506] [2021-12-14 17:46:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:31,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:46:31,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:46:31,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:31,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:46:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:46:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:31,554 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-14 17:46:31,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:31,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461752506] [2021-12-14 17:46:31,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461752506] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:31,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:31,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 17:46:31,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281482062] [2021-12-14 17:46:31,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:31,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 17:46:31,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 17:46:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:46:31,557 INFO L87 Difference]: Start difference. First operand 10931 states and 15904 transitions. Second operand has 9 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:46:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:46:42,075 INFO L93 Difference]: Finished difference Result 27272 states and 40484 transitions. [2021-12-14 17:46:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 17:46:42,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 134 [2021-12-14 17:46:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:46:42,141 INFO L225 Difference]: With dead ends: 27272 [2021-12-14 17:46:42,142 INFO L226 Difference]: Without dead ends: 16353 [2021-12-14 17:46:42,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-12-14 17:46:42,172 INFO L933 BasicCegarLoop]: 1779 mSDtfsCounter, 5475 mSDsluCounter, 5129 mSDsCounter, 0 mSdLazyCounter, 9040 mSolverCounterSat, 3162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5768 SdHoareTripleChecker+Valid, 6908 SdHoareTripleChecker+Invalid, 12202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3162 IncrementalHoareTripleChecker+Valid, 9040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-12-14 17:46:42,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5768 Valid, 6908 Invalid, 12202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3162 Valid, 9040 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-12-14 17:46:42,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16353 states. [2021-12-14 17:46:42,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16353 to 12266. [2021-12-14 17:46:42,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12266 states, 8957 states have (on average 1.353466562465111) internal successors, (12123), 9118 states have internal predecessors, (12123), 2688 states have call successors, (2688), 576 states have call predecessors, (2688), 620 states have return successors, (2913), 2681 states have call predecessors, (2913), 2687 states have call successors, (2913) [2021-12-14 17:46:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12266 states to 12266 states and 17724 transitions. [2021-12-14 17:46:42,668 INFO L78 Accepts]: Start accepts. Automaton has 12266 states and 17724 transitions. Word has length 134 [2021-12-14 17:46:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:46:42,669 INFO L470 AbstractCegarLoop]: Abstraction has 12266 states and 17724 transitions. [2021-12-14 17:46:42,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.375) internal successors, (83), 7 states have internal predecessors, (83), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-14 17:46:42,669 INFO L276 IsEmpty]: Start isEmpty. Operand 12266 states and 17724 transitions. [2021-12-14 17:46:42,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-14 17:46:42,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:46:42,696 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 7, 7, 7, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:46:42,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 17:46:42,697 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:46:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:46:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1419893241, now seen corresponding path program 1 times [2021-12-14 17:46:42,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:46:42,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291792448] [2021-12-14 17:46:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:46:42,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:46:42,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:46:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:46:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:46:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:46:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:46:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-14 17:46:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:46:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-14 17:46:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 17:46:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-14 17:46:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-12-14 17:46:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 17:46:42,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-12-14 17:46:42,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:46:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-14 17:46:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:42,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-14 17:46:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 17:46:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-14 17:46:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-14 17:46:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:46:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-14 17:46:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2021-12-14 17:46:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-14 17:46:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-14 17:46:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-14 17:46:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-14 17:46:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 183 [2021-12-14 17:46:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-14 17:46:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:46:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2021-12-14 17:46:42,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:46:42,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291792448] [2021-12-14 17:46:42,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291792448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:46:42,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:46:42,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:46:42,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381814181] [2021-12-14 17:46:42,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:46:42,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:46:42,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:46:42,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:46:42,921 INFO L87 Difference]: Start difference. First operand 12266 states and 17724 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (29), 2 states have call predecessors, (29), 2 states have call successors, (29)