./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--ppp--ppp_async.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.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 f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 03:57:16,728 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 03:57:16,730 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 03:57:16,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 03:57:16,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 03:57:16,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 03:57:16,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 03:57:16,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 03:57:16,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 03:57:16,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 03:57:16,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 03:57:16,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 03:57:16,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 03:57:16,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 03:57:16,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 03:57:16,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 03:57:16,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 03:57:16,769 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 03:57:16,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 03:57:16,776 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 03:57:16,778 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 03:57:16,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 03:57:16,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 03:57:16,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 03:57:16,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 03:57:16,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 03:57:16,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 03:57:16,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 03:57:16,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 03:57:16,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 03:57:16,789 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 03:57:16,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 03:57:16,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 03:57:16,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 03:57:16,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 03:57:16,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 03:57:16,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 03:57:16,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 03:57:16,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 03:57:16,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 03:57:16,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 03:57:16,798 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 03:57:16,835 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 03:57:16,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 03:57:16,837 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 03:57:16,838 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 03:57:16,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 03:57:16,839 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 03:57:16,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 03:57:16,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 03:57:16,840 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 03:57:16,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 03:57:16,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 03:57:16,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 03:57:16,841 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 03:57:16,841 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 03:57:16,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 03:57:16,842 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 03:57:16,842 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 03:57:16,842 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 03:57:16,842 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 03:57:16,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 03:57:16,843 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 03:57:16,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:57:16,843 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 03:57:16,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 03:57:16,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 03:57:16,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 03:57:16,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 03:57:16,844 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 03:57:16,844 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 03:57:16,844 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 03:57:16,844 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f78e25bf76e2d1d395e5e41868c5ddb628a36f1efdf095bb509ea6a3a366617b [2021-12-28 03:57:17,098 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 03:57:17,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 03:57:17,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 03:57:17,123 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 03:57:17,139 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 03:57:17,141 INFO L432 ainManager$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--ppp--ppp_async.ko-entry_point.cil.out.i [2021-12-28 03:57:17,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e18488a7b/2da71b55e6ec4b5dab8c7a7e09d2897d/FLAG658ae6717 [2021-12-28 03:57:17,815 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 03:57:17,815 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--ppp--ppp_async.ko-entry_point.cil.out.i [2021-12-28 03:57:17,851 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e18488a7b/2da71b55e6ec4b5dab8c7a7e09d2897d/FLAG658ae6717 [2021-12-28 03:57:18,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e18488a7b/2da71b55e6ec4b5dab8c7a7e09d2897d [2021-12-28 03:57:18,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 03:57:18,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 03:57:18,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 03:57:18,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 03:57:18,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 03:57:18,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:57:18" (1/1) ... [2021-12-28 03:57:18,236 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a5e5ba0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:18, skipping insertion in model container [2021-12-28 03:57:18,236 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 03:57:18" (1/1) ... [2021-12-28 03:57:18,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 03:57:18,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 03:57:19,005 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--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-12-28 03:57:19,326 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:57:19,339 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 03:57:19,438 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--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2021-12-28 03:57:19,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 03:57:19,592 INFO L208 MainTranslator]: Completed translation [2021-12-28 03:57:19,592 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19 WrapperNode [2021-12-28 03:57:19,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 03:57:19,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 03:57:19,595 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 03:57:19,595 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 03:57:19,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,656 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,738 INFO L137 Inliner]: procedures = 180, calls = 578, calls flagged for inlining = 99, calls inlined = 93, statements flattened = 2364 [2021-12-28 03:57:19,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 03:57:19,739 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 03:57:19,739 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 03:57:19,739 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 03:57:19,745 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,907 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 03:57:19,908 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 03:57:19,909 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 03:57:19,909 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 03:57:19,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (1/1) ... [2021-12-28 03:57:19,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 03:57:19,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:57:19,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 03:57:19,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 03:57:19,981 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-28 03:57:19,982 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-28 03:57:19,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 03:57:19,982 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_async_push [2021-12-28 03:57:19,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_async_push [2021-12-28 03:57:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-12-28 03:57:19,983 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-12-28 03:57:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 03:57:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 03:57:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 03:57:19,983 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 03:57:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 03:57:19,983 INFO L130 BoogieDeclarations]: Found specification of procedure crc_ccitt_byte [2021-12-28 03:57:19,984 INFO L138 BoogieDeclarations]: Found implementation of procedure crc_ccitt_byte [2021-12-28 03:57:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure ap_put [2021-12-28 03:57:19,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_put [2021-12-28 03:57:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-12-28 03:57:19,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-12-28 03:57:19,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 03:57:19,985 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 03:57:19,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-28 03:57:19,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-28 03:57:19,985 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 03:57:19,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 03:57:19,985 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_hangup [2021-12-28 03:57:19,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_hangup [2021-12-28 03:57:19,985 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-28 03:57:19,985 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-28 03:57:19,986 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-12-28 03:57:19,986 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-12-28 03:57:19,986 INFO L130 BoogieDeclarations]: Found specification of procedure get_unaligned_be16 [2021-12-28 03:57:19,986 INFO L138 BoogieDeclarations]: Found implementation of procedure get_unaligned_be16 [2021-12-28 03:57:19,986 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-28 03:57:19,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-28 03:57:19,986 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-28 03:57:19,986 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-28 03:57:19,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 03:57:19,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 03:57:19,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 03:57:19,987 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-28 03:57:19,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-28 03:57:19,988 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-28 03:57:19,988 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-28 03:57:19,988 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 03:57:19,988 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 03:57:19,988 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_close [2021-12-28 03:57:19,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_close [2021-12-28 03:57:19,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 03:57:19,989 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_poll [2021-12-28 03:57:19,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_poll [2021-12-28 03:57:19,989 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-12-28 03:57:19,989 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-12-28 03:57:19,989 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-28 03:57:19,989 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-28 03:57:19,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 03:57:19,990 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 03:57:19,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 03:57:19,990 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-12-28 03:57:19,991 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-12-28 03:57:19,991 INFO L130 BoogieDeclarations]: Found specification of procedure ap_get [2021-12-28 03:57:19,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ap_get [2021-12-28 03:57:19,991 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-12-28 03:57:19,992 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-12-28 03:57:19,992 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 03:57:19,992 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-28 03:57:19,992 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-28 03:57:19,992 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-12-28 03:57:19,992 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-12-28 03:57:19,992 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 03:57:19,992 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 03:57:19,992 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-28 03:57:19,993 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-28 03:57:19,993 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-28 03:57:19,993 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-28 03:57:19,993 INFO L130 BoogieDeclarations]: Found specification of procedure async_lcp_peek [2021-12-28 03:57:19,993 INFO L138 BoogieDeclarations]: Found implementation of procedure async_lcp_peek [2021-12-28 03:57:19,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 03:57:19,994 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-12-28 03:57:19,994 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-12-28 03:57:19,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 03:57:19,994 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-28 03:57:19,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-28 03:57:19,994 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-28 03:57:19,994 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-28 03:57:19,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 03:57:19,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 03:57:19,995 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_asynctty_ioctl [2021-12-28 03:57:19,995 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_asynctty_ioctl [2021-12-28 03:57:19,995 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-12-28 03:57:19,995 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-12-28 03:57:20,373 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 03:57:20,375 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 03:57:20,757 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 03:57:23,809 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 03:57:23,836 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 03:57:23,836 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-28 03:57:23,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:57:23 BoogieIcfgContainer [2021-12-28 03:57:23,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 03:57:23,840 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 03:57:23,840 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 03:57:23,842 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 03:57:23,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 03:57:18" (1/3) ... [2021-12-28 03:57:23,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dbc6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:57:23, skipping insertion in model container [2021-12-28 03:57:23,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 03:57:19" (2/3) ... [2021-12-28 03:57:23,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47dbc6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 03:57:23, skipping insertion in model container [2021-12-28 03:57:23,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 03:57:23" (3/3) ... [2021-12-28 03:57:23,843 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2021-12-28 03:57:23,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 03:57:23,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 03:57:23,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 03:57:23,900 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 03:57:23,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 03:57:23,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 723 states, 569 states have (on average 1.437609841827768) internal successors, (818), 583 states have internal predecessors, (818), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2021-12-28 03:57:23,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 03:57:23,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:57:23,941 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:57:23,942 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:57:23,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:57:23,945 INFO L85 PathProgramCache]: Analyzing trace with hash 678107625, now seen corresponding path program 1 times [2021-12-28 03:57:23,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:57:23,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543460258] [2021-12-28 03:57:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:57:23,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:57:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:57:24,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:57:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:57:24,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:57:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:24,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:57:24,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:57:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:57:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 03:57:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:57:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-28 03:57:24,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:57:24,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543460258] [2021-12-28 03:57:24,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543460258] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:57:24,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:57:24,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 03:57:24,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818663626] [2021-12-28 03:57:24,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:57:24,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 03:57:24,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:57:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 03:57:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 03:57:24,343 INFO L87 Difference]: Start difference. First operand has 723 states, 569 states have (on average 1.437609841827768) internal successors, (818), 583 states have internal predecessors, (818), 116 states have call successors, (116), 37 states have call predecessors, (116), 36 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-28 03:57:27,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:27,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:57:27,965 INFO L93 Difference]: Finished difference Result 2286 states and 3408 transitions. [2021-12-28 03:57:27,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 03:57:27,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 78 [2021-12-28 03:57:27,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:57:27,983 INFO L225 Difference]: With dead ends: 2286 [2021-12-28 03:57:27,984 INFO L226 Difference]: Without dead ends: 1552 [2021-12-28 03:57:27,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:57:27,992 INFO L933 BasicCegarLoop]: 1102 mSDtfsCounter, 1440 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 308 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 2192 SdHoareTripleChecker+Invalid, 1203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-28 03:57:27,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 2192 Invalid, 1203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 894 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-12-28 03:57:28,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2021-12-28 03:57:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1380. [2021-12-28 03:57:28,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1098 states have (on average 1.424408014571949) internal successors, (1564), 1114 states have internal predecessors, (1564), 211 states have call successors, (211), 71 states have call predecessors, (211), 70 states have return successors, (210), 210 states have call predecessors, (210), 210 states have call successors, (210) [2021-12-28 03:57:28,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1985 transitions. [2021-12-28 03:57:28,113 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1985 transitions. Word has length 78 [2021-12-28 03:57:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:57:28,113 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 1985 transitions. [2021-12-28 03:57:28,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-28 03:57:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1985 transitions. [2021-12-28 03:57:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 03:57:28,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:57:28,118 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:57:28,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 03:57:28,118 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:57:28,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:57:28,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1376133839, now seen corresponding path program 1 times [2021-12-28 03:57:28,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:57:28,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220487130] [2021-12-28 03:57:28,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:57:28,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:57:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:57:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:57:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:57:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:57:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:28,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:57:28,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:57:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:57:28,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 03:57:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:57:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-28 03:57:28,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:57:28,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220487130] [2021-12-28 03:57:28,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220487130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:57:28,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:57:28,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:57:28,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176365382] [2021-12-28 03:57:28,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:57:28,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:57:28,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:57:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:57:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:57:28,265 INFO L87 Difference]: Start difference. First operand 1380 states and 1985 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-28 03:57:31,971 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:32,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:57:32,292 INFO L93 Difference]: Finished difference Result 4425 states and 6457 transitions. [2021-12-28 03:57:32,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:57:32,292 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), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 82 [2021-12-28 03:57:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:57:32,305 INFO L225 Difference]: With dead ends: 4425 [2021-12-28 03:57:32,305 INFO L226 Difference]: Without dead ends: 3063 [2021-12-28 03:57:32,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:57:32,310 INFO L933 BasicCegarLoop]: 1103 mSDtfsCounter, 1460 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 1896 mSolverCounterSat, 307 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 1896 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-28 03:57:32,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1559 Valid, 3585 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 1896 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-12-28 03:57:32,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2021-12-28 03:57:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2799. [2021-12-28 03:57:32,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2799 states, 2229 states have (on average 1.4262000897263347) internal successors, (3179), 2267 states have internal predecessors, (3179), 421 states have call successors, (421), 141 states have call predecessors, (421), 148 states have return successors, (464), 422 states have call predecessors, (464), 420 states have call successors, (464) [2021-12-28 03:57:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2799 states to 2799 states and 4064 transitions. [2021-12-28 03:57:32,404 INFO L78 Accepts]: Start accepts. Automaton has 2799 states and 4064 transitions. Word has length 82 [2021-12-28 03:57:32,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:57:32,406 INFO L470 AbstractCegarLoop]: Abstraction has 2799 states and 4064 transitions. [2021-12-28 03:57:32,406 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), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-12-28 03:57:32,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2799 states and 4064 transitions. [2021-12-28 03:57:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-28 03:57:32,416 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:57:32,416 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:57:32,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 03:57:32,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:57:32,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:57:32,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2115293044, now seen corresponding path program 1 times [2021-12-28 03:57:32,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:57:32,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050841027] [2021-12-28 03:57:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:57:32,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:57:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:57:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:57:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:57:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:57:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:57:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:57:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:57:32,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 03:57:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:57:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 03:57:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 03:57:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:57:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:57:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-12-28 03:57:32,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:57:32,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050841027] [2021-12-28 03:57:32,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050841027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:57:32,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:57:32,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:57:32,655 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311469957] [2021-12-28 03:57:32,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:57:32,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:57:32,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:57:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:57:32,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:57:32,657 INFO L87 Difference]: Start difference. First operand 2799 states and 4064 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 03:57:36,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:38,473 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:38,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:57:38,620 INFO L93 Difference]: Finished difference Result 7425 states and 10855 transitions. [2021-12-28 03:57:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 03:57:38,621 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 140 [2021-12-28 03:57:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:57:38,638 INFO L225 Difference]: With dead ends: 7425 [2021-12-28 03:57:38,639 INFO L226 Difference]: Without dead ends: 4650 [2021-12-28 03:57:38,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 03:57:38,647 INFO L933 BasicCegarLoop]: 976 mSDtfsCounter, 1955 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 1386 mSolverCounterSat, 767 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 2155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 1386 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:57:38,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 2326 Invalid, 2155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 1386 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-12-28 03:57:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2021-12-28 03:57:38,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 4161. [2021-12-28 03:57:38,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4161 states, 3313 states have (on average 1.43284032598853) internal successors, (4747), 3367 states have internal predecessors, (4747), 613 states have call successors, (613), 213 states have call predecessors, (613), 234 states have return successors, (696), 618 states have call predecessors, (696), 612 states have call successors, (696) [2021-12-28 03:57:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4161 states to 4161 states and 6056 transitions. [2021-12-28 03:57:38,776 INFO L78 Accepts]: Start accepts. Automaton has 4161 states and 6056 transitions. Word has length 140 [2021-12-28 03:57:38,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:57:38,778 INFO L470 AbstractCegarLoop]: Abstraction has 4161 states and 6056 transitions. [2021-12-28 03:57:38,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 3 states have internal predecessors, (72), 2 states have call successors, (17), 6 states have call predecessors, (17), 1 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 03:57:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4161 states and 6056 transitions. [2021-12-28 03:57:38,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-12-28 03:57:38,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:57:38,786 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:57:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 03:57:38,787 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:57:38,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:57:38,790 INFO L85 PathProgramCache]: Analyzing trace with hash 840633849, now seen corresponding path program 1 times [2021-12-28 03:57:38,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:57:38,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585814158] [2021-12-28 03:57:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:57:38,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:57:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:57:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:57:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:57:38,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:57:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:57:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:57:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:57:38,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 03:57:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:57:38,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-28 03:57:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-12-28 03:57:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-12-28 03:57:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:38,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-28 03:57:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-28 03:57:38,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 03:57:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:38,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-28 03:57:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:39,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:39,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-12-28 03:57:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-28 03:57:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-28 03:57:39,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:57:39,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585814158] [2021-12-28 03:57:39,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585814158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:57:39,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:57:39,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 03:57:39,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342592690] [2021-12-28 03:57:39,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:57:39,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 03:57:39,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:57:39,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 03:57:39,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 03:57:39,021 INFO L87 Difference]: Start difference. First operand 4161 states and 6056 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:57:42,606 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:44,629 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:46,701 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:48,723 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:57:48,977 INFO L93 Difference]: Finished difference Result 10882 states and 15769 transitions. [2021-12-28 03:57:48,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 03:57:48,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 169 [2021-12-28 03:57:48,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:57:49,005 INFO L225 Difference]: With dead ends: 10882 [2021-12-28 03:57:49,005 INFO L226 Difference]: Without dead ends: 6745 [2021-12-28 03:57:49,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:57:49,016 INFO L933 BasicCegarLoop]: 1466 mSDtfsCounter, 1247 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 1442 mSolverCounterSat, 371 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1301 SdHoareTripleChecker+Valid, 3313 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1442 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-12-28 03:57:49,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1301 Valid, 3313 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1442 Invalid, 4 Unknown, 0 Unchecked, 9.7s Time] [2021-12-28 03:57:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6745 states. [2021-12-28 03:57:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6745 to 6110. [2021-12-28 03:57:49,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6110 states, 4891 states have (on average 1.418523819259865) internal successors, (6938), 4975 states have internal predecessors, (6938), 848 states have call successors, (848), 335 states have call predecessors, (848), 370 states have return successors, (977), 859 states have call predecessors, (977), 847 states have call successors, (977) [2021-12-28 03:57:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6110 states to 6110 states and 8763 transitions. [2021-12-28 03:57:49,245 INFO L78 Accepts]: Start accepts. Automaton has 6110 states and 8763 transitions. Word has length 169 [2021-12-28 03:57:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:57:49,245 INFO L470 AbstractCegarLoop]: Abstraction has 6110 states and 8763 transitions. [2021-12-28 03:57:49,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (22), 4 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-28 03:57:49,246 INFO L276 IsEmpty]: Start isEmpty. Operand 6110 states and 8763 transitions. [2021-12-28 03:57:49,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-28 03:57:49,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:57:49,254 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:57:49,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 03:57:49,255 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:57:49,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:57:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1912369058, now seen corresponding path program 1 times [2021-12-28 03:57:49,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:57:49,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219247350] [2021-12-28 03:57:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:57:49,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:57:49,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:57:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:57:49,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:57:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:57:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:57:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:57:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:57:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 03:57:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:57:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:57:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 03:57:49,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 03:57:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 03:57:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:57:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:57:49,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-12-28 03:57:49,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:57:49,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219247350] [2021-12-28 03:57:49,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219247350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:57:49,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:57:49,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:57:49,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108654404] [2021-12-28 03:57:49,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:57:49,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:57:49,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:57:49,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:57:49,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:57:49,447 INFO L87 Difference]: Start difference. First operand 6110 states and 8763 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-28 03:57:53,600 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:55,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:57:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:57:55,707 INFO L93 Difference]: Finished difference Result 15870 states and 22783 transitions. [2021-12-28 03:57:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 03:57:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 163 [2021-12-28 03:57:55,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:57:55,755 INFO L225 Difference]: With dead ends: 15870 [2021-12-28 03:57:55,756 INFO L226 Difference]: Without dead ends: 9795 [2021-12-28 03:57:55,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-28 03:57:55,773 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 2851 mSDsluCounter, 1350 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 1126 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2926 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 2630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:57:55,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2926 Valid, 2342 Invalid, 2630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1126 Valid, 1502 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-12-28 03:57:55,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9795 states. [2021-12-28 03:57:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9795 to 8838. [2021-12-28 03:57:56,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8838 states, 7071 states have (on average 1.410550134351577) internal successors, (9974), 7191 states have internal predecessors, (9974), 1184 states have call successors, (1184), 525 states have call predecessors, (1184), 582 states have return successors, (1368), 1201 states have call predecessors, (1368), 1183 states have call successors, (1368) [2021-12-28 03:57:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8838 states to 8838 states and 12526 transitions. [2021-12-28 03:57:56,051 INFO L78 Accepts]: Start accepts. Automaton has 8838 states and 12526 transitions. Word has length 163 [2021-12-28 03:57:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:57:56,052 INFO L470 AbstractCegarLoop]: Abstraction has 8838 states and 12526 transitions. [2021-12-28 03:57:56,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (19), 6 states have call predecessors, (19), 1 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-12-28 03:57:56,053 INFO L276 IsEmpty]: Start isEmpty. Operand 8838 states and 12526 transitions. [2021-12-28 03:57:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 03:57:56,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:57:56,063 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:57:56,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 03:57:56,064 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:57:56,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:57:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1253354754, now seen corresponding path program 1 times [2021-12-28 03:57:56,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:57:56,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115668789] [2021-12-28 03:57:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:57:56,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:57:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:57:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:57:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:57:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:57:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:57:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:57:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:57:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 03:57:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:57:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:57:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 03:57:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:57:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 03:57:56,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:57:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:57:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:57:56,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-28 03:57:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:57:56,319 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-28 03:57:56,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:57:56,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115668789] [2021-12-28 03:57:56,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115668789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:57:56,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:57:56,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 03:57:56,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570756690] [2021-12-28 03:57:56,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:57:56,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 03:57:56,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:57:56,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 03:57:56,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-28 03:57:56,321 INFO L87 Difference]: Start difference. First operand 8838 states and 12526 transitions. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-28 03:57:59,972 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:58:01,989 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:58:04,012 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:58:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:04,071 INFO L93 Difference]: Finished difference Result 14382 states and 20629 transitions. [2021-12-28 03:58:04,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 03:58:04,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 168 [2021-12-28 03:58:04,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:04,100 INFO L225 Difference]: With dead ends: 14382 [2021-12-28 03:58:04,100 INFO L226 Difference]: Without dead ends: 9802 [2021-12-28 03:58:04,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 03:58:04,112 INFO L933 BasicCegarLoop]: 935 mSDtfsCounter, 918 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 1363 mSolverCounterSat, 449 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 953 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 449 IncrementalHoareTripleChecker+Valid, 1363 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:04,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [953 Valid, 2712 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [449 Valid, 1363 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2021-12-28 03:58:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9802 states. [2021-12-28 03:58:04,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9802 to 8858. [2021-12-28 03:58:04,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8858 states, 7091 states have (on average 1.4093921872796502) internal successors, (9994), 7211 states have internal predecessors, (9994), 1184 states have call successors, (1184), 525 states have call predecessors, (1184), 582 states have return successors, (1368), 1201 states have call predecessors, (1368), 1183 states have call successors, (1368) [2021-12-28 03:58:04,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8858 states to 8858 states and 12546 transitions. [2021-12-28 03:58:04,325 INFO L78 Accepts]: Start accepts. Automaton has 8858 states and 12546 transitions. Word has length 168 [2021-12-28 03:58:04,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:04,325 INFO L470 AbstractCegarLoop]: Abstraction has 8858 states and 12546 transitions. [2021-12-28 03:58:04,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 3 states have internal predecessors, (92), 2 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-12-28 03:58:04,326 INFO L276 IsEmpty]: Start isEmpty. Operand 8858 states and 12546 transitions. [2021-12-28 03:58:04,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-28 03:58:04,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:04,335 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:58:04,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 03:58:04,336 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1255892641, now seen corresponding path program 1 times [2021-12-28 03:58:04,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:04,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52331117] [2021-12-28 03:58:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:04,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:04,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:58:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:58:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:58:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:58:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 03:58:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:58:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:58:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 03:58:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-28 03:58:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 03:58:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-28 03:58:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:58:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 03:58:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:04,688 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2021-12-28 03:58:04,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:04,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52331117] [2021-12-28 03:58:04,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52331117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 03:58:04,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642880092] [2021-12-28 03:58:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:04,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:58:04,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 03:58:04,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 03:58:04,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 03:58:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:05,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-28 03:58:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 03:58:05,396 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 89 proven. 5 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-28 03:58:05,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 03:58:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-28 03:58:06,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642880092] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 03:58:06,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 03:58:06,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 17 [2021-12-28 03:58:06,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605107083] [2021-12-28 03:58:06,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 03:58:06,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 03:58:06,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:06,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 03:58:06,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-12-28 03:58:06,326 INFO L87 Difference]: Start difference. First operand 8858 states and 12546 transitions. Second operand has 17 states, 16 states have (on average 11.3125) internal successors, (181), 13 states have internal predecessors, (181), 8 states have call successors, (48), 9 states have call predecessors, (48), 6 states have return successors, (38), 7 states have call predecessors, (38), 8 states have call successors, (38) [2021-12-28 03:58:13,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:58:15,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:58:18,462 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:58:20,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 03:58:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 03:58:21,134 INFO L93 Difference]: Finished difference Result 25915 states and 37319 transitions. [2021-12-28 03:58:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-28 03:58:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 11.3125) internal successors, (181), 13 states have internal predecessors, (181), 8 states have call successors, (48), 9 states have call predecessors, (48), 6 states have return successors, (38), 7 states have call predecessors, (38), 8 states have call successors, (38) Word has length 170 [2021-12-28 03:58:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 03:58:21,189 INFO L225 Difference]: With dead ends: 25915 [2021-12-28 03:58:21,189 INFO L226 Difference]: Without dead ends: 17092 [2021-12-28 03:58:21,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 378 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=407, Invalid=1399, Unknown=0, NotChecked=0, Total=1806 [2021-12-28 03:58:21,215 INFO L933 BasicCegarLoop]: 1290 mSDtfsCounter, 6584 mSDsluCounter, 4474 mSDsCounter, 0 mSdLazyCounter, 8256 mSolverCounterSat, 2624 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6718 SdHoareTripleChecker+Valid, 5764 SdHoareTripleChecker+Invalid, 10884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2624 IncrementalHoareTripleChecker+Valid, 8256 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2021-12-28 03:58:21,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6718 Valid, 5764 Invalid, 10884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2624 Valid, 8256 Invalid, 4 Unknown, 0 Unchecked, 13.9s Time] [2021-12-28 03:58:21,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17092 states. [2021-12-28 03:58:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17092 to 15079. [2021-12-28 03:58:21,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15079 states, 12027 states have (on average 1.4122391286272553) internal successors, (16985), 12237 states have internal predecessors, (16985), 2108 states have call successors, (2108), 888 states have call predecessors, (2108), 943 states have return successors, (2377), 2103 states have call predecessors, (2377), 2107 states have call successors, (2377) [2021-12-28 03:58:21,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15079 states to 15079 states and 21470 transitions. [2021-12-28 03:58:21,769 INFO L78 Accepts]: Start accepts. Automaton has 15079 states and 21470 transitions. Word has length 170 [2021-12-28 03:58:21,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 03:58:21,770 INFO L470 AbstractCegarLoop]: Abstraction has 15079 states and 21470 transitions. [2021-12-28 03:58:21,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 11.3125) internal successors, (181), 13 states have internal predecessors, (181), 8 states have call successors, (48), 9 states have call predecessors, (48), 6 states have return successors, (38), 7 states have call predecessors, (38), 8 states have call successors, (38) [2021-12-28 03:58:21,770 INFO L276 IsEmpty]: Start isEmpty. Operand 15079 states and 21470 transitions. [2021-12-28 03:58:21,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-12-28 03:58:21,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 03:58:21,783 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 03:58:21,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 03:58:21,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 03:58:22,000 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 03:58:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 03:58:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash -221570316, now seen corresponding path program 1 times [2021-12-28 03:58:22,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 03:58:22,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571502914] [2021-12-28 03:58:22,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 03:58:22,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 03:58:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 03:58:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-28 03:58:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-28 03:58:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-28 03:58:22,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 03:58:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-28 03:58:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-28 03:58:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-28 03:58:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-28 03:58:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-28 03:58:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 03:58:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 03:58:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-28 03:58:22,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-28 03:58:22,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-12-28 03:58:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2021-12-28 03:58:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 03:58:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 03:58:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2021-12-28 03:58:22,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 03:58:22,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571502914] [2021-12-28 03:58:22,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571502914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 03:58:22,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 03:58:22,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 03:58:22,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004758241] [2021-12-28 03:58:22,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 03:58:22,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 03:58:22,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 03:58:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 03:58:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 03:58:22,179 INFO L87 Difference]: Start difference. First operand 15079 states and 21470 transitions. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 4 states have internal predecessors, (120), 2 states have call successors, (19), 4 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18)