./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_synctty.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.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 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 17:45:11,697 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 17:45:11,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 17:45:11,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 17:45:11,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 17:45:11,766 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 17:45:11,767 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 17:45:11,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 17:45:11,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 17:45:11,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 17:45:11,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 17:45:11,772 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 17:45:11,772 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 17:45:11,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 17:45:11,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 17:45:11,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 17:45:11,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 17:45:11,776 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 17:45:11,777 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 17:45:11,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 17:45:11,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 17:45:11,784 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 17:45:11,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 17:45:11,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 17:45:11,788 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 17:45:11,788 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 17:45:11,788 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 17:45:11,789 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 17:45:11,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 17:45:11,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 17:45:11,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 17:45:11,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 17:45:11,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 17:45:11,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 17:45:11,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 17:45:11,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 17:45:11,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 17:45:11,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 17:45:11,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 17:45:11,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 17:45:11,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 17:45:11,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-14 17:45:11,809 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 17:45:11,812 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 17:45:11,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 17:45:11,814 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 17:45:11,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 17:45:11,815 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 17:45:11,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 17:45:11,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 17:45:11,816 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 17:45:11,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 17:45:11,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 17:45:11,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 17:45:11,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 17:45:11,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 17:45:11,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 17:45:11,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 17:45:11,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 17:45:11,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 17:45:11,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 17:45:11,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 17:45:11,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 17:45:11,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:45:11,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 17:45:11,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 17:45:11,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 17:45:11,819 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 17:45:11,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 17:45:11,820 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 17:45:11,820 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 17:45:11,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 17:45:11,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 17:45:11,821 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 389f662f7096bd36438270dc54f296be4073de8eeb864b893c17044d6fb4cc06 [2021-12-14 17:45:12,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 17:45:12,056 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 17:45:12,058 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 17:45:12,059 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 17:45:12,060 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 17:45:12,061 INFO L432 ainManager$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_synctty.ko-entry_point.cil.out.i [2021-12-14 17:45:12,108 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1531961/6db43bec06a0495fbbbea23528ad96fd/FLAG2f1928e6c [2021-12-14 17:45:12,740 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 17:45:12,740 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_synctty.ko-entry_point.cil.out.i [2021-12-14 17:45:12,775 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1531961/6db43bec06a0495fbbbea23528ad96fd/FLAG2f1928e6c [2021-12-14 17:45:13,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1531961/6db43bec06a0495fbbbea23528ad96fd [2021-12-14 17:45:13,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 17:45:13,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 17:45:13,138 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 17:45:13,138 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 17:45:13,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 17:45:13,141 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:45:13" (1/1) ... [2021-12-14 17:45:13,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17ea6f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:13, skipping insertion in model container [2021-12-14 17:45:13,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:45:13" (1/1) ... [2021-12-14 17:45:13,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 17:45:13,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 17:45:13,875 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_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-12-14 17:45:14,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:45:14,103 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 17:45:14,229 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_synctty.ko-entry_point.cil.out.i[163507,163520] [2021-12-14 17:45:14,325 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 17:45:14,444 INFO L208 MainTranslator]: Completed translation [2021-12-14 17:45:14,446 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14 WrapperNode [2021-12-14 17:45:14,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 17:45:14,447 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 17:45:14,448 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 17:45:14,448 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 17:45:14,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,594 INFO L137 Inliner]: procedures = 176, calls = 448, calls flagged for inlining = 92, calls inlined = 85, statements flattened = 1769 [2021-12-14 17:45:14,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 17:45:14,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 17:45:14,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 17:45:14,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 17:45:14,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,623 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,670 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 17:45:14,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 17:45:14,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 17:45:14,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 17:45:14,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (1/1) ... [2021-12-14 17:45:14,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 17:45:14,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:45:14,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-14 17:45:14,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-14 17:45:14,785 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-14 17:45:14,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-14 17:45:14,786 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_15 [2021-12-14 17:45:14,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_15 [2021-12-14 17:45:14,786 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_poll [2021-12-14 17:45:14,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_poll [2021-12-14 17:45:14,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-14 17:45:14,786 INFO L130 BoogieDeclarations]: Found specification of procedure skb_reserve [2021-12-14 17:45:14,786 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_reserve [2021-12-14 17:45:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-14 17:45:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-14 17:45:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-14 17:45:14,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-14 17:45:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 17:45:14,787 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-12-14 17:45:14,787 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-12-14 17:45:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_output_wakeup [2021-12-14 17:45:14,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_output_wakeup [2021-12-14 17:45:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-14 17:45:14,788 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-14 17:45:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-12-14 17:45:14,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-12-14 17:45:14,788 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-14 17:45:14,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-14 17:45:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure spin_trylock_bh [2021-12-14 17:45:14,789 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_trylock_bh [2021-12-14 17:45:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-12-14 17:45:14,789 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-12-14 17:45:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure skb_trim [2021-12-14 17:45:14,789 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_trim [2021-12-14 17:45:14,789 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-14 17:45:14,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-14 17:45:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_synctty_ioctl [2021-12-14 17:45:14,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_synctty_ioctl [2021-12-14 17:45:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-14 17:45:14,790 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-14 17:45:14,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 17:45:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-14 17:45:14,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-14 17:45:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure skb_pull [2021-12-14 17:45:14,791 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_pull [2021-12-14 17:45:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_close [2021-12-14 17:45:14,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_close [2021-12-14 17:45:14,791 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-14 17:45:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-14 17:45:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-12-14 17:45:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-12-14 17:45:14,792 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_print_buffer [2021-12-14 17:45:14,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_print_buffer [2021-12-14 17:45:14,793 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-14 17:45:14,793 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-14 17:45:14,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 17:45:14,793 INFO L130 BoogieDeclarations]: Found specification of procedure test_and_set_bit [2021-12-14 17:45:14,793 INFO L138 BoogieDeclarations]: Found implementation of procedure test_and_set_bit [2021-12-14 17:45:14,793 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-14 17:45:14,794 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-14 17:45:14,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 17:45:14,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 17:45:14,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 17:45:14,795 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_to_user [2021-12-14 17:45:14,795 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_to_user [2021-12-14 17:45:14,795 INFO L130 BoogieDeclarations]: Found specification of procedure tasklet_schedule [2021-12-14 17:45:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure tasklet_schedule [2021-12-14 17:45:14,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 17:45:14,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-14 17:45:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-14 17:45:14,796 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2021-12-14 17:45:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2021-12-14 17:45:14,796 INFO L130 BoogieDeclarations]: Found specification of procedure sp_put [2021-12-14 17:45:14,796 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_put [2021-12-14 17:45:14,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 17:45:14,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 17:45:14,797 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-12-14 17:45:14,797 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-12-14 17:45:14,797 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_hangup [2021-12-14 17:45:14,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_hangup [2021-12-14 17:45:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-12-14 17:45:14,798 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-12-14 17:45:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure skb_put [2021-12-14 17:45:14,798 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_put [2021-12-14 17:45:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure sp_get [2021-12-14 17:45:14,798 INFO L138 BoogieDeclarations]: Found implementation of procedure sp_get [2021-12-14 17:45:14,798 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-12-14 17:45:14,799 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-12-14 17:45:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 17:45:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-12-14 17:45:14,799 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-12-14 17:45:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-14 17:45:14,799 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-14 17:45:14,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-14 17:45:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-12-14 17:45:14,800 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-12-14 17:45:14,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 17:45:14,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 17:45:14,801 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_sync_push [2021-12-14 17:45:14,801 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_sync_push [2021-12-14 17:45:15,212 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 17:45:15,216 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 17:45:15,286 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-14 17:45:16,094 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 17:45:16,102 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 17:45:16,103 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 17:45:16,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:45:16 BoogieIcfgContainer [2021-12-14 17:45:16,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 17:45:16,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 17:45:16,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 17:45:16,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 17:45:16,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:45:13" (1/3) ... [2021-12-14 17:45:16,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfa881c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:45:16, skipping insertion in model container [2021-12-14 17:45:16,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:45:14" (2/3) ... [2021-12-14 17:45:16,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfa881c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:45:16, skipping insertion in model container [2021-12-14 17:45:16,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:45:16" (3/3) ... [2021-12-14 17:45:16,111 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_synctty.ko-entry_point.cil.out.i [2021-12-14 17:45:16,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 17:45:16,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 17:45:16,178 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 17:45:16,184 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 17:45:16,184 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 17:45:16,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 644 states, 483 states have (on average 1.391304347826087) internal successors, (672), 499 states have internal predecessors, (672), 120 states have call successors, (120), 40 states have call predecessors, (120), 39 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) [2021-12-14 17:45:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-14 17:45:16,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:16,211 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] [2021-12-14 17:45:16,212 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:16,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:16,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1758611482, now seen corresponding path program 1 times [2021-12-14 17:45:16,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:16,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991668245] [2021-12-14 17:45:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:16,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:16,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:16,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:16,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-14 17:45:16,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:16,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991668245] [2021-12-14 17:45:16,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991668245] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:16,665 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:16,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 17:45:16,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439572443] [2021-12-14 17:45:16,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:16,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 17:45:16,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:16,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 17:45:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 17:45:16,702 INFO L87 Difference]: Start difference. First operand has 644 states, 483 states have (on average 1.391304347826087) internal successors, (672), 499 states have internal predecessors, (672), 120 states have call successors, (120), 40 states have call predecessors, (120), 39 states have return successors, (116), 114 states have call predecessors, (116), 116 states have call successors, (116) 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) [2021-12-14 17:45:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:17,968 INFO L93 Difference]: Finished difference Result 2033 states and 2996 transitions. [2021-12-14 17:45:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-14 17:45:17,970 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 [2021-12-14 17:45:17,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:17,992 INFO L225 Difference]: With dead ends: 2033 [2021-12-14 17:45:17,993 INFO L226 Difference]: Without dead ends: 1378 [2021-12-14 17:45:18,000 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 [2021-12-14 17:45:18,006 INFO L933 BasicCegarLoop]: 983 mSDtfsCounter, 1248 mSDsluCounter, 1074 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:18,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1335 Valid, 2057 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:45:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2021-12-14 17:45:18,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1222. [2021-12-14 17:45:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 926 states have (on average 1.3736501079913608) internal successors, (1272), 946 states have internal predecessors, (1272), 219 states have call successors, (219), 77 states have call predecessors, (219), 76 states have return successors, (218), 214 states have call predecessors, (218), 218 states have call successors, (218) [2021-12-14 17:45:18,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1709 transitions. [2021-12-14 17:45:18,119 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1709 transitions. Word has length 78 [2021-12-14 17:45:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:18,120 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 1709 transitions. [2021-12-14 17:45:18,120 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) [2021-12-14 17:45:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1709 transitions. [2021-12-14 17:45:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-14 17:45:18,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:18,124 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] [2021-12-14 17:45:18,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 17:45:18,125 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash -152487068, now seen corresponding path program 1 times [2021-12-14 17:45:18,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:18,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394787445] [2021-12-14 17:45:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:18,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:18,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-14 17:45:18,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:18,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394787445] [2021-12-14 17:45:18,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394787445] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:18,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:18,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:45:18,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722334117] [2021-12-14 17:45:18,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:18,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:45:18,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:18,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:45:18,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:45:18,278 INFO L87 Difference]: Start difference. First operand 1222 states and 1709 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) [2021-12-14 17:45:19,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:19,645 INFO L93 Difference]: Finished difference Result 3917 states and 5611 transitions. [2021-12-14 17:45:19,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:45:19,645 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 [2021-12-14 17:45:19,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:19,664 INFO L225 Difference]: With dead ends: 3917 [2021-12-14 17:45:19,664 INFO L226 Difference]: Without dead ends: 2713 [2021-12-14 17:45:19,668 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 [2021-12-14 17:45:19,672 INFO L933 BasicCegarLoop]: 962 mSDtfsCounter, 1267 mSDsluCounter, 2585 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1359 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:19,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1359 Valid, 3547 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 17:45:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-12-14 17:45:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 2509. [2021-12-14 17:45:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1903 states have (on average 1.3751970572779821) internal successors, (2617), 1951 states have internal predecessors, (2617), 443 states have call successors, (443), 153 states have call predecessors, (443), 162 states have return successors, (500), 438 states have call predecessors, (500), 442 states have call successors, (500) [2021-12-14 17:45:19,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3560 transitions. [2021-12-14 17:45:19,781 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3560 transitions. Word has length 82 [2021-12-14 17:45:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:19,783 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3560 transitions. [2021-12-14 17:45:19,783 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) [2021-12-14 17:45:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3560 transitions. [2021-12-14 17:45:19,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-14 17:45:19,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:19,795 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2021-12-14 17:45:19,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 17:45:19,796 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:19,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash -950375967, now seen corresponding path program 1 times [2021-12-14 17:45:19,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:19,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747554383] [2021-12-14 17:45:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:19,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:19,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:19,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-14 17:45:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:45:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 17:45:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-14 17:45:19,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:19,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747554383] [2021-12-14 17:45:19,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747554383] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:19,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:19,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:45:19,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112305680] [2021-12-14 17:45:19,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:19,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:45:19,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:19,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:45:19,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:19,981 INFO L87 Difference]: Start difference. First operand 2509 states and 3560 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:45:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:21,619 INFO L93 Difference]: Finished difference Result 6827 states and 9761 transitions. [2021-12-14 17:45:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:45:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 128 [2021-12-14 17:45:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:21,637 INFO L225 Difference]: With dead ends: 6827 [2021-12-14 17:45:21,638 INFO L226 Difference]: Without dead ends: 4342 [2021-12-14 17:45:21,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:45:21,649 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 1615 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 790 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1687 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 2004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 790 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:21,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1687 Valid, 2610 Invalid, 2004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [790 Valid, 1214 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 17:45:21,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-12-14 17:45:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3931. [2021-12-14 17:45:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 2993 states have (on average 1.3742064817908453) internal successors, (4113), 3055 states have internal predecessors, (4113), 659 states have call successors, (659), 249 states have call predecessors, (659), 278 states have return successors, (777), 662 states have call predecessors, (777), 658 states have call successors, (777) [2021-12-14 17:45:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 5549 transitions. [2021-12-14 17:45:21,777 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 5549 transitions. Word has length 128 [2021-12-14 17:45:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:21,777 INFO L470 AbstractCegarLoop]: Abstraction has 3931 states and 5549 transitions. [2021-12-14 17:45:21,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-14 17:45:21,778 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 5549 transitions. [2021-12-14 17:45:21,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-14 17:45:21,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:21,783 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 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] [2021-12-14 17:45:21,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 17:45:21,785 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:21,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:21,786 INFO L85 PathProgramCache]: Analyzing trace with hash -944835305, now seen corresponding path program 1 times [2021-12-14 17:45:21,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:21,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35335816] [2021-12-14 17:45:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:21,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:21,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:21,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-14 17:45:21,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 17:45:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-14 17:45:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-14 17:45:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-14 17:45:21,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:21,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35335816] [2021-12-14 17:45:21,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35335816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:21,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:21,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-14 17:45:21,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191979752] [2021-12-14 17:45:21,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:21,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-14 17:45:21,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:21,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-14 17:45:21,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-14 17:45:21,998 INFO L87 Difference]: Start difference. First operand 3931 states and 5549 transitions. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-12-14 17:45:23,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:23,232 INFO L93 Difference]: Finished difference Result 9990 states and 14092 transitions. [2021-12-14 17:45:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:45:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 3 states have internal predecessors, (85), 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) Word has length 149 [2021-12-14 17:45:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:23,266 INFO L225 Difference]: With dead ends: 9990 [2021-12-14 17:45:23,266 INFO L226 Difference]: Without dead ends: 6083 [2021-12-14 17:45:23,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:45:23,281 INFO L933 BasicCegarLoop]: 1195 mSDtfsCounter, 1046 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 413 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 2846 SdHoareTripleChecker+Invalid, 1434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:23,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1101 Valid, 2846 Invalid, 1434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [413 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:45:23,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6083 states. [2021-12-14 17:45:23,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6083 to 5590. [2021-12-14 17:45:23,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 4255 states have (on average 1.3635722679200941) internal successors, (5802), 4361 states have internal predecessors, (5802), 906 states have call successors, (906), 383 states have call predecessors, (906), 428 states have return successors, (1074), 909 states have call predecessors, (1074), 905 states have call successors, (1074) [2021-12-14 17:45:23,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 7782 transitions. [2021-12-14 17:45:23,533 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 7782 transitions. Word has length 149 [2021-12-14 17:45:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:23,534 INFO L470 AbstractCegarLoop]: Abstraction has 5590 states and 7782 transitions. [2021-12-14 17:45:23,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-12-14 17:45:23,536 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 7782 transitions. [2021-12-14 17:45:23,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-14 17:45:23,545 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:23,546 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:23,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 17:45:23,546 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:23,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1643009203, now seen corresponding path program 1 times [2021-12-14 17:45:23,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:23,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780746878] [2021-12-14 17:45:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:23,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:23,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:23,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-14 17:45:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:45:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:23,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 17:45:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-14 17:45:23,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:23,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780746878] [2021-12-14 17:45:23,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780746878] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:23,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:23,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:45:23,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142301598] [2021-12-14 17:45:23,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:23,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:45:23,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:23,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:45:23,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:23,717 INFO L87 Difference]: Start difference. First operand 5590 states and 7782 transitions. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (18), 6 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-14 17:45:25,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:25,735 INFO L93 Difference]: Finished difference Result 14712 states and 20604 transitions. [2021-12-14 17:45:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-14 17:45:25,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (18), 6 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 151 [2021-12-14 17:45:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:25,786 INFO L225 Difference]: With dead ends: 14712 [2021-12-14 17:45:25,786 INFO L226 Difference]: Without dead ends: 9157 [2021-12-14 17:45:25,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:45:25,803 INFO L933 BasicCegarLoop]: 899 mSDtfsCounter, 1619 mSDsluCounter, 2122 mSDsCounter, 0 mSdLazyCounter, 1709 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 1709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:25,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1696 Valid, 3021 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 1709 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 17:45:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9157 states. [2021-12-14 17:45:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9157 to 8330. [2021-12-14 17:45:26,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8330 states, 6415 states have (on average 1.3624318004676539) internal successors, (8740), 6559 states have internal predecessors, (8740), 1254 states have call successors, (1254), 587 states have call predecessors, (1254), 660 states have return successors, (1489), 1267 states have call predecessors, (1489), 1253 states have call successors, (1489) [2021-12-14 17:45:26,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8330 states to 8330 states and 11483 transitions. [2021-12-14 17:45:26,173 INFO L78 Accepts]: Start accepts. Automaton has 8330 states and 11483 transitions. Word has length 151 [2021-12-14 17:45:26,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:26,173 INFO L470 AbstractCegarLoop]: Abstraction has 8330 states and 11483 transitions. [2021-12-14 17:45:26,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (18), 6 states have call predecessors, (18), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-12-14 17:45:26,174 INFO L276 IsEmpty]: Start isEmpty. Operand 8330 states and 11483 transitions. [2021-12-14 17:45:26,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-14 17:45:26,183 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:26,183 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:26,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 17:45:26,184 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:26,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1373098194, now seen corresponding path program 1 times [2021-12-14 17:45:26,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:26,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964215492] [2021-12-14 17:45:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:26,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:26,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:26,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:45:26,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:45:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 17:45:26,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-12-14 17:45:26,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:26,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964215492] [2021-12-14 17:45:26,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964215492] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:26,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:26,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:45:26,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747537865] [2021-12-14 17:45:26,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:26,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:45:26,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:26,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:45:26,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:26,376 INFO L87 Difference]: Start difference. First operand 8330 states and 11483 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-14 17:45:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:27,846 INFO L93 Difference]: Finished difference Result 13560 states and 19023 transitions. [2021-12-14 17:45:27,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:45:27,855 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), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 156 [2021-12-14 17:45:27,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:27,900 INFO L225 Difference]: With dead ends: 13560 [2021-12-14 17:45:27,900 INFO L226 Difference]: Without dead ends: 9164 [2021-12-14 17:45:27,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:45:27,913 INFO L933 BasicCegarLoop]: 823 mSDtfsCounter, 530 mSDsluCounter, 2125 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:27,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [550 Valid, 2948 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-14 17:45:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9164 states. [2021-12-14 17:45:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9164 to 8350. [2021-12-14 17:45:28,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8350 states, 6435 states have (on average 1.3613053613053614) internal successors, (8760), 6579 states have internal predecessors, (8760), 1254 states have call successors, (1254), 587 states have call predecessors, (1254), 660 states have return successors, (1489), 1267 states have call predecessors, (1489), 1253 states have call successors, (1489) [2021-12-14 17:45:28,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8350 states to 8350 states and 11503 transitions. [2021-12-14 17:45:28,140 INFO L78 Accepts]: Start accepts. Automaton has 8350 states and 11503 transitions. Word has length 156 [2021-12-14 17:45:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:28,141 INFO L470 AbstractCegarLoop]: Abstraction has 8350 states and 11503 transitions. [2021-12-14 17:45:28,141 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), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-14 17:45:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 8350 states and 11503 transitions. [2021-12-14 17:45:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-14 17:45:28,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:28,152 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:28,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 17:45:28,152 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:28,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:28,153 INFO L85 PathProgramCache]: Analyzing trace with hash 554198863, now seen corresponding path program 1 times [2021-12-14 17:45:28,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:28,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153795031] [2021-12-14 17:45:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:28,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:28,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-14 17:45:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-14 17:45:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-14 17:45:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:28,506 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2021-12-14 17:45:28,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:28,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153795031] [2021-12-14 17:45:28,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153795031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:28,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:28,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-12-14 17:45:28,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661698109] [2021-12-14 17:45:28,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:28,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-14 17:45:28,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:28,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-14 17:45:28,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-14 17:45:28,509 INFO L87 Difference]: Start difference. First operand 8350 states and 11503 transitions. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 8 states have internal predecessors, (87), 5 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-14 17:45:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:31,938 INFO L93 Difference]: Finished difference Result 18695 states and 25902 transitions. [2021-12-14 17:45:31,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-14 17:45:31,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 8 states have internal predecessors, (87), 5 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) Word has length 158 [2021-12-14 17:45:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:31,966 INFO L225 Difference]: With dead ends: 18695 [2021-12-14 17:45:31,966 INFO L226 Difference]: Without dead ends: 10380 [2021-12-14 17:45:31,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=527, Unknown=0, NotChecked=0, Total=702 [2021-12-14 17:45:31,983 INFO L933 BasicCegarLoop]: 970 mSDtfsCounter, 3198 mSDsluCounter, 2794 mSDsCounter, 0 mSdLazyCounter, 3258 mSolverCounterSat, 1705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3287 SdHoareTripleChecker+Valid, 3764 SdHoareTripleChecker+Invalid, 4963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1705 IncrementalHoareTripleChecker+Valid, 3258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:31,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3287 Valid, 3764 Invalid, 4963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1705 Valid, 3258 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-14 17:45:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10380 states. [2021-12-14 17:45:32,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10380 to 8726. [2021-12-14 17:45:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8726 states, 6679 states have (on average 1.3505015720916305) internal successors, (9020), 6821 states have internal predecessors, (9020), 1346 states have call successors, (1346), 665 states have call predecessors, (1346), 700 states have return successors, (1519), 1331 states have call predecessors, (1519), 1345 states have call successors, (1519) [2021-12-14 17:45:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8726 states to 8726 states and 11885 transitions. [2021-12-14 17:45:32,214 INFO L78 Accepts]: Start accepts. Automaton has 8726 states and 11885 transitions. Word has length 158 [2021-12-14 17:45:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:32,215 INFO L470 AbstractCegarLoop]: Abstraction has 8726 states and 11885 transitions. [2021-12-14 17:45:32,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 8 states have internal predecessors, (87), 5 states have call successors, (19), 6 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 4 states have call successors, (18) [2021-12-14 17:45:32,223 INFO L276 IsEmpty]: Start isEmpty. Operand 8726 states and 11885 transitions. [2021-12-14 17:45:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-12-14 17:45:32,236 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:32,236 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:32,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 17:45:32,236 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:32,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:32,237 INFO L85 PathProgramCache]: Analyzing trace with hash -3224619, now seen corresponding path program 1 times [2021-12-14 17:45:32,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:32,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14154648] [2021-12-14 17:45:32,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:32,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:32,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:32,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:45:32,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:32,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:45:32,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 17:45:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:32,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-14 17:45:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2021-12-14 17:45:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:32,535 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2021-12-14 17:45:32,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14154648] [2021-12-14 17:45:32,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14154648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:32,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:32,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:45:32,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630792883] [2021-12-14 17:45:32,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:32,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:45:32,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:45:32,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:45:32,537 INFO L87 Difference]: Start difference. First operand 8726 states and 11885 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-14 17:45:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:33,921 INFO L93 Difference]: Finished difference Result 18475 states and 25394 transitions. [2021-12-14 17:45:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:45:33,922 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) Word has length 193 [2021-12-14 17:45:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:33,954 INFO L225 Difference]: With dead ends: 18475 [2021-12-14 17:45:33,954 INFO L226 Difference]: Without dead ends: 9784 [2021-12-14 17:45:33,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:45:33,977 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 426 mSDsluCounter, 2722 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 3563 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:33,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 3563 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:45:33,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9784 states. [2021-12-14 17:45:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9784 to 8790. [2021-12-14 17:45:34,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8790 states, 6727 states have (on average 1.3480005946187008) internal successors, (9068), 6869 states have internal predecessors, (9068), 1346 states have call successors, (1346), 665 states have call predecessors, (1346), 716 states have return successors, (1543), 1347 states have call predecessors, (1543), 1345 states have call successors, (1543) [2021-12-14 17:45:34,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8790 states to 8790 states and 11957 transitions. [2021-12-14 17:45:34,233 INFO L78 Accepts]: Start accepts. Automaton has 8790 states and 11957 transitions. Word has length 193 [2021-12-14 17:45:34,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:34,234 INFO L470 AbstractCegarLoop]: Abstraction has 8790 states and 11957 transitions. [2021-12-14 17:45:34,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 4 states have internal predecessors, (105), 2 states have call successors, (22), 5 states have call predecessors, (22), 3 states have return successors, (21), 3 states have call predecessors, (21), 2 states have call successors, (21) [2021-12-14 17:45:34,234 INFO L276 IsEmpty]: Start isEmpty. Operand 8790 states and 11957 transitions. [2021-12-14 17:45:34,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2021-12-14 17:45:34,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:34,249 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:34,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 17:45:34,250 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:34,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:34,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1088928772, now seen corresponding path program 1 times [2021-12-14 17:45:34,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:34,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135227927] [2021-12-14 17:45:34,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:34,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:34,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-14 17:45:34,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-12-14 17:45:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-14 17:45:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-12-14 17:45:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2021-12-14 17:45:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2021-12-14 17:45:34,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:34,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135227927] [2021-12-14 17:45:34,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135227927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:34,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:34,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 17:45:34,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739532661] [2021-12-14 17:45:34,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:34,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 17:45:34,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:34,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 17:45:34,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-14 17:45:34,447 INFO L87 Difference]: Start difference. First operand 8790 states and 11957 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 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) [2021-12-14 17:45:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:36,497 INFO L93 Difference]: Finished difference Result 22136 states and 30222 transitions. [2021-12-14 17:45:36,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:45:36,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 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 215 [2021-12-14 17:45:36,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:36,595 INFO L225 Difference]: With dead ends: 22136 [2021-12-14 17:45:36,596 INFO L226 Difference]: Without dead ends: 13381 [2021-12-14 17:45:36,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-14 17:45:36,615 INFO L933 BasicCegarLoop]: 1444 mSDtfsCounter, 1149 mSDsluCounter, 2709 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 4153 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:36,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1190 Valid, 4153 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-14 17:45:36,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13381 states. [2021-12-14 17:45:36,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13381 to 8806. [2021-12-14 17:45:36,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8806 states, 6743 states have (on average 1.3471748479905086) internal successors, (9084), 6885 states have internal predecessors, (9084), 1346 states have call successors, (1346), 665 states have call predecessors, (1346), 716 states have return successors, (1543), 1347 states have call predecessors, (1543), 1345 states have call successors, (1543) [2021-12-14 17:45:36,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8806 states to 8806 states and 11973 transitions. [2021-12-14 17:45:36,998 INFO L78 Accepts]: Start accepts. Automaton has 8806 states and 11973 transitions. Word has length 215 [2021-12-14 17:45:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:36,999 INFO L470 AbstractCegarLoop]: Abstraction has 8806 states and 11973 transitions. [2021-12-14 17:45:36,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 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) [2021-12-14 17:45:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 8806 states and 11973 transitions. [2021-12-14 17:45:37,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-14 17:45:37,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:37,012 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:37,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 17:45:37,013 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:37,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:37,013 INFO L85 PathProgramCache]: Analyzing trace with hash 2069474836, now seen corresponding path program 1 times [2021-12-14 17:45:37,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:37,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321152426] [2021-12-14 17:45:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:37,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:37,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:37,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:45:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:45:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 17:45:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-14 17:45:37,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-14 17:45:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 320 trivial. 0 not checked. [2021-12-14 17:45:37,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:37,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321152426] [2021-12-14 17:45:37,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321152426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:45:37,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538402318] [2021-12-14 17:45:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:37,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:45:37,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:45:37,340 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) [2021-12-14 17:45:37,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 17:45:37,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:37,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 17:45:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:45:38,143 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 8 refuted. 0 times theorem prover too weak. 227 trivial. 0 not checked. [2021-12-14 17:45:38,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:45:38,642 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2021-12-14 17:45:38,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538402318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:45:38,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:45:38,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 20 [2021-12-14 17:45:38,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495268029] [2021-12-14 17:45:38,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:45:38,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-14 17:45:38,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-14 17:45:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-12-14 17:45:38,644 INFO L87 Difference]: Start difference. First operand 8806 states and 11973 transitions. Second operand has 20 states, 20 states have (on average 10.4) internal successors, (208), 17 states have internal predecessors, (208), 9 states have call successors, (57), 9 states have call predecessors, (57), 11 states have return successors, (44), 13 states have call predecessors, (44), 9 states have call successors, (44) [2021-12-14 17:45:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:45,182 INFO L93 Difference]: Finished difference Result 31956 states and 44216 transitions. [2021-12-14 17:45:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-12-14 17:45:45,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 10.4) internal successors, (208), 17 states have internal predecessors, (208), 9 states have call successors, (57), 9 states have call predecessors, (57), 11 states have return successors, (44), 13 states have call predecessors, (44), 9 states have call successors, (44) Word has length 200 [2021-12-14 17:45:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:45,396 INFO L225 Difference]: With dead ends: 31956 [2021-12-14 17:45:45,396 INFO L226 Difference]: Without dead ends: 27104 [2021-12-14 17:45:45,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 443 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1994, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 17:45:45,434 INFO L933 BasicCegarLoop]: 1622 mSDtfsCounter, 9411 mSDsluCounter, 5886 mSDsCounter, 0 mSdLazyCounter, 7766 mSolverCounterSat, 4384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9687 SdHoareTripleChecker+Valid, 7508 SdHoareTripleChecker+Invalid, 12150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4384 IncrementalHoareTripleChecker+Valid, 7766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:45,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9687 Valid, 7508 Invalid, 12150 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4384 Valid, 7766 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-14 17:45:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27104 states. [2021-12-14 17:45:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27104 to 24845. [2021-12-14 17:45:46,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24845 states, 18848 states have (on average 1.3417869269949065) internal successors, (25290), 19360 states have internal predecessors, (25290), 3884 states have call successors, (3884), 1849 states have call predecessors, (3884), 2112 states have return successors, (5009), 3909 states have call predecessors, (5009), 3883 states have call successors, (5009) [2021-12-14 17:45:46,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24845 states to 24845 states and 34183 transitions. [2021-12-14 17:45:46,327 INFO L78 Accepts]: Start accepts. Automaton has 24845 states and 34183 transitions. Word has length 200 [2021-12-14 17:45:46,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:46,328 INFO L470 AbstractCegarLoop]: Abstraction has 24845 states and 34183 transitions. [2021-12-14 17:45:46,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 10.4) internal successors, (208), 17 states have internal predecessors, (208), 9 states have call successors, (57), 9 states have call predecessors, (57), 11 states have return successors, (44), 13 states have call predecessors, (44), 9 states have call successors, (44) [2021-12-14 17:45:46,328 INFO L276 IsEmpty]: Start isEmpty. Operand 24845 states and 34183 transitions. [2021-12-14 17:45:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-12-14 17:45:46,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:46,341 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:46,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 17:45:46,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-14 17:45:46,562 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:46,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:46,562 INFO L85 PathProgramCache]: Analyzing trace with hash -872421549, now seen corresponding path program 1 times [2021-12-14 17:45:46,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:46,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099727514] [2021-12-14 17:45:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:46,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:46,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:46,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:46,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:45:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:45:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 17:45:46,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:46,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-14 17:45:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-14 17:45:46,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:46,752 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-12-14 17:45:46,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:46,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099727514] [2021-12-14 17:45:46,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099727514] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:46,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:46,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:45:46,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310537266] [2021-12-14 17:45:46,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:46,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:45:46,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:46,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:45:46,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:46,755 INFO L87 Difference]: Start difference. First operand 24845 states and 34183 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:45:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:48,593 INFO L93 Difference]: Finished difference Result 47218 states and 65947 transitions. [2021-12-14 17:45:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 17:45:48,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 202 [2021-12-14 17:45:48,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:48,702 INFO L225 Difference]: With dead ends: 47218 [2021-12-14 17:45:48,703 INFO L226 Difference]: Without dead ends: 26319 [2021-12-14 17:45:48,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:45:48,762 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 443 mSDsluCounter, 2078 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 2919 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:48,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 2919 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 17:45:48,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26319 states. [2021-12-14 17:45:49,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26319 to 24829. [2021-12-14 17:45:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24829 states, 18832 states have (on average 1.3396346644010195) internal successors, (25228), 19344 states have internal predecessors, (25228), 3884 states have call successors, (3884), 1849 states have call predecessors, (3884), 2112 states have return successors, (4997), 3909 states have call predecessors, (4997), 3883 states have call successors, (4997) [2021-12-14 17:45:49,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24829 states to 24829 states and 34109 transitions. [2021-12-14 17:45:49,645 INFO L78 Accepts]: Start accepts. Automaton has 24829 states and 34109 transitions. Word has length 202 [2021-12-14 17:45:49,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:49,645 INFO L470 AbstractCegarLoop]: Abstraction has 24829 states and 34109 transitions. [2021-12-14 17:45:49,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 4 states have internal predecessors, (111), 2 states have call successors, (23), 5 states have call predecessors, (23), 2 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:45:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 24829 states and 34109 transitions. [2021-12-14 17:45:49,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-12-14 17:45:49,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:49,659 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:49,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-14 17:45:49,659 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:49,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:49,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1114922220, now seen corresponding path program 1 times [2021-12-14 17:45:49,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:49,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433920476] [2021-12-14 17:45:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:49,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:49,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:49,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:49,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:49,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:49,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:49,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:49,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:45:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:45:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 17:45:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:49,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-14 17:45:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:49,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-14 17:45:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-12-14 17:45:49,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:49,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433920476] [2021-12-14 17:45:49,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433920476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:49,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:49,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 17:45:49,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891326322] [2021-12-14 17:45:49,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:49,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 17:45:49,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 17:45:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-14 17:45:49,860 INFO L87 Difference]: Start difference. First operand 24829 states and 34109 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (23), 5 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:45:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:52,193 INFO L93 Difference]: Finished difference Result 66761 states and 96168 transitions. [2021-12-14 17:45:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-14 17:45:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (23), 5 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 204 [2021-12-14 17:45:52,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:52,329 INFO L225 Difference]: With dead ends: 66761 [2021-12-14 17:45:52,329 INFO L226 Difference]: Without dead ends: 41967 [2021-12-14 17:45:52,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:45:52,393 INFO L933 BasicCegarLoop]: 1409 mSDtfsCounter, 1366 mSDsluCounter, 3282 mSDsCounter, 0 mSdLazyCounter, 1322 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 4691 SdHoareTripleChecker+Invalid, 1763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 1322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:52,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1456 Valid, 4691 Invalid, 1763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 1322 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-14 17:45:52,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41967 states. [2021-12-14 17:45:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41967 to 24889. [2021-12-14 17:45:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24889 states, 18892 states have (on average 1.338556002540758) internal successors, (25288), 19404 states have internal predecessors, (25288), 3884 states have call successors, (3884), 1849 states have call predecessors, (3884), 2112 states have return successors, (4997), 3909 states have call predecessors, (4997), 3883 states have call successors, (4997) [2021-12-14 17:45:53,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24889 states to 24889 states and 34169 transitions. [2021-12-14 17:45:53,418 INFO L78 Accepts]: Start accepts. Automaton has 24889 states and 34169 transitions. Word has length 204 [2021-12-14 17:45:53,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:53,418 INFO L470 AbstractCegarLoop]: Abstraction has 24889 states and 34169 transitions. [2021-12-14 17:45:53,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (23), 5 states have call predecessors, (23), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-12-14 17:45:53,419 INFO L276 IsEmpty]: Start isEmpty. Operand 24889 states and 34169 transitions. [2021-12-14 17:45:53,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-14 17:45:53,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:53,432 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:53,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-14 17:45:53,432 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:53,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1099484298, now seen corresponding path program 1 times [2021-12-14 17:45:53,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:53,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119702403] [2021-12-14 17:45:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:53,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:45:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:45:53,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 17:45:53,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:53,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:53,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:53,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-14 17:45:53,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-14 17:45:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-14 17:45:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-12-14 17:45:53,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:53,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119702403] [2021-12-14 17:45:53,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119702403] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 17:45:53,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 17:45:53,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-14 17:45:53,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014609244] [2021-12-14 17:45:53,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 17:45:53,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 17:45:53,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:45:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 17:45:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-14 17:45:53,819 INFO L87 Difference]: Start difference. First operand 24889 states and 34169 transitions. Second operand has 8 states, 8 states have (on average 14.25) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (24), 5 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:45:55,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 17:45:55,468 INFO L93 Difference]: Finished difference Result 38316 states and 52807 transitions. [2021-12-14 17:45:55,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 17:45:55,469 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (24), 5 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 208 [2021-12-14 17:45:55,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 17:45:55,512 INFO L225 Difference]: With dead ends: 38316 [2021-12-14 17:45:55,512 INFO L226 Difference]: Without dead ends: 13432 [2021-12-14 17:45:55,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-12-14 17:45:55,562 INFO L933 BasicCegarLoop]: 844 mSDtfsCounter, 657 mSDsluCounter, 2718 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 3562 SdHoareTripleChecker+Invalid, 1702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 17:45:55,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 3562 Invalid, 1702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 17:45:55,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13432 states. [2021-12-14 17:45:56,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13432 to 12493. [2021-12-14 17:45:56,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12493 states, 9477 states have (on average 1.3408251556399704) internal successors, (12707), 9738 states have internal predecessors, (12707), 1958 states have call successors, (1958), 926 states have call predecessors, (1958), 1057 states have return successors, (2524), 1965 states have call predecessors, (2524), 1957 states have call successors, (2524) [2021-12-14 17:45:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12493 states to 12493 states and 17189 transitions. [2021-12-14 17:45:56,126 INFO L78 Accepts]: Start accepts. Automaton has 12493 states and 17189 transitions. Word has length 208 [2021-12-14 17:45:56,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 17:45:56,126 INFO L470 AbstractCegarLoop]: Abstraction has 12493 states and 17189 transitions. [2021-12-14 17:45:56,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.25) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (24), 5 states have call predecessors, (24), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-12-14 17:45:56,127 INFO L276 IsEmpty]: Start isEmpty. Operand 12493 states and 17189 transitions. [2021-12-14 17:45:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-12-14 17:45:56,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 17:45:56,137 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 17:45:56,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-14 17:45:56,137 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 17:45:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 17:45:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1517373000, now seen corresponding path program 1 times [2021-12-14 17:45:56,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 17:45:56,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969958028] [2021-12-14 17:45:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:56,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 17:45:56,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 17:45:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-14 17:45:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 17:45:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-14 17:45:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-14 17:45:56,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-14 17:45:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-14 17:45:56,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-12-14 17:45:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-12-14 17:45:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-14 17:45:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-14 17:45:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-14 17:45:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-14 17:45:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-14 17:45:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2021-12-14 17:45:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 17:45:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:56,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2021-12-14 17:45:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 177 [2021-12-14 17:45:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-14 17:45:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-14 17:45:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 48 proven. 13 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2021-12-14 17:45:57,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 17:45:57,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969958028] [2021-12-14 17:45:57,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969958028] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 17:45:57,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699893637] [2021-12-14 17:45:57,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 17:45:57,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 17:45:57,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 17:45:57,405 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 17:45:57,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 17:45:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 17:45:57,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 158 conjunts are in the unsatisfiable core [2021-12-14 17:45:57,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 17:45:58,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 17:45:58,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-14 17:45:59,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-14 17:45:59,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2021-12-14 17:45:59,768 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2021-12-14 17:45:59,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 17:46:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-12-14 17:46:00,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 62 [2021-12-14 17:46:00,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-12-14 17:46:00,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2021-12-14 17:46:01,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 31 [2021-12-14 17:46:01,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 54 [2021-12-14 17:46:01,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-12-14 17:46:01,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2021-12-14 17:46:01,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-12-14 17:46:01,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2021-12-14 17:46:01,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 50 [2021-12-14 17:46:01,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 82 [2021-12-14 17:46:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-12-14 17:46:02,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699893637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 17:46:02,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 17:46:02,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28, 25] total 81 [2021-12-14 17:46:02,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225292789] [2021-12-14 17:46:02,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 17:46:02,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-12-14 17:46:02,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 17:46:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-12-14 17:46:02,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=6090, Unknown=0, NotChecked=0, Total=6480 [2021-12-14 17:46:02,467 INFO L87 Difference]: Start difference. First operand 12493 states and 17189 transitions. Second operand has 81 states, 74 states have (on average 4.175675675675675) internal successors, (309), 63 states have internal predecessors, (309), 24 states have call successors, (71), 12 states have call predecessors, (71), 24 states have return successors, (60), 29 states have call predecessors, (60), 24 states have call successors, (60)