./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5b36d44f 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.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 7a2974a33527a9392dca8d355734fee3e0faaae6e14749128119c28fd0f37e8f --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5b36d44 [2021-11-07 15:47:13,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 15:47:13,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 15:47:13,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 15:47:13,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 15:47:13,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 15:47:13,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 15:47:13,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 15:47:13,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 15:47:13,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 15:47:13,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 15:47:13,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 15:47:13,152 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 15:47:13,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 15:47:13,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 15:47:13,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 15:47:13,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 15:47:13,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 15:47:13,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 15:47:13,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 15:47:13,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 15:47:13,162 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 15:47:13,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 15:47:13,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 15:47:13,166 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 15:47:13,167 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 15:47:13,167 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 15:47:13,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 15:47:13,168 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 15:47:13,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 15:47:13,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 15:47:13,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 15:47:13,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 15:47:13,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 15:47:13,172 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 15:47:13,173 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 15:47:13,173 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 15:47:13,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 15:47:13,174 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 15:47:13,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 15:47:13,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 15:47:13,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-07 15:47:13,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 15:47:13,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 15:47:13,198 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 15:47:13,198 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 15:47:13,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 15:47:13,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 15:47:13,200 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 15:47:13,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 15:47:13,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 15:47:13,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 15:47:13,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 15:47:13,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 15:47:13,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 15:47:13,201 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 15:47:13,201 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 15:47:13,202 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 15:47:13,202 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 15:47:13,202 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 15:47:13,202 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 15:47:13,202 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 15:47:13,203 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 15:47:13,203 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 15:47:13,203 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 15:47:13,203 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 15:47:13,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 15:47:13,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 15:47:13,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 15:47:13,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 15:47:13,204 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 15:47:13,204 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a2974a33527a9392dca8d355734fee3e0faaae6e14749128119c28fd0f37e8f [2021-11-07 15:47:13,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 15:47:13,449 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 15:47:13,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 15:47:13,460 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 15:47:13,461 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 15:47:13,462 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-07 15:47:13,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce11c9d21/b230c07a978e48dba4d49bd8364c8d0d/FLAG87bc67d87 [2021-11-07 15:47:14,277 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 15:47:14,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-07 15:47:14,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce11c9d21/b230c07a978e48dba4d49bd8364c8d0d/FLAG87bc67d87 [2021-11-07 15:47:14,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce11c9d21/b230c07a978e48dba4d49bd8364c8d0d [2021-11-07 15:47:14,546 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 15:47:14,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 15:47:14,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 15:47:14,549 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 15:47:14,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 15:47:14,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:47:14" (1/1) ... [2021-11-07 15:47:14,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf85adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:14, skipping insertion in model container [2021-11-07 15:47:14,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 03:47:14" (1/1) ... [2021-11-07 15:47:14,559 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 15:47:14,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 15:47:16,633 WARN L228 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i[386204,386217] [2021-11-07 15:47:16,711 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 15:47:16,753 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 15:47:17,170 WARN L228 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-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i[386204,386217] [2021-11-07 15:47:17,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 15:47:17,313 INFO L208 MainTranslator]: Completed translation [2021-11-07 15:47:17,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17 WrapperNode [2021-11-07 15:47:17,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 15:47:17,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 15:47:17,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 15:47:17,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 15:47:17,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:17,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:20,114 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 15:47:20,115 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 15:47:20,115 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 15:47:20,115 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 15:47:20,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:20,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:20,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:20,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:22,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:22,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:22,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:23,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 15:47:23,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 15:47:23,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 15:47:23,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 15:47:23,047 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (1/1) ... [2021-11-07 15:47:23,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 15:47:23,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-07 15:47:23,076 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) [2021-11-07 15:47:23,103 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 [2021-11-07 15:47:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure type3_infoblock [2021-11-07 15:47:23,120 INFO L138 BoogieDeclarations]: Found implementation of procedure type3_infoblock [2021-11-07 15:47:23,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 15:47:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 15:47:23,121 INFO L130 BoogieDeclarations]: Found specification of procedure type4_infoblock [2021-11-07 15:47:23,121 INFO L138 BoogieDeclarations]: Found implementation of procedure type4_infoblock [2021-11-07 15:47:23,122 INFO L130 BoogieDeclarations]: Found specification of procedure type5_infoblock [2021-11-07 15:47:23,122 INFO L138 BoogieDeclarations]: Found implementation of procedure type5_infoblock [2021-11-07 15:47:23,122 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140m_autoconf [2021-11-07 15:47:23,122 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140m_autoconf [2021-11-07 15:47:23,122 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_open [2021-11-07 15:47:23,123 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_open [2021-11-07 15:47:23,123 INFO L130 BoogieDeclarations]: Found specification of procedure dc21040_autoconf [2021-11-07 15:47:23,123 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21040_autoconf [2021-11-07 15:47:23,123 INFO L130 BoogieDeclarations]: Found specification of procedure type2_infoblock [2021-11-07 15:47:23,123 INFO L138 BoogieDeclarations]: Found implementation of procedure type2_infoblock [2021-11-07 15:47:23,123 INFO L130 BoogieDeclarations]: Found specification of procedure type0_infoblock [2021-11-07 15:47:23,123 INFO L138 BoogieDeclarations]: Found implementation of procedure type0_infoblock [2021-11-07 15:47:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 15:47:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 15:47:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure autoconf_media [2021-11-07 15:47:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure autoconf_media [2021-11-07 15:47:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure dc21041_autoconf [2021-11-07 15:47:23,124 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21041_autoconf [2021-11-07 15:47:23,124 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_ast [2021-11-07 15:47:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_ast [2021-11-07 15:47:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 15:47:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure dc21143_infoleaf [2021-11-07 15:47:23,125 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21143_infoleaf [2021-11-07 15:47:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-07 15:47:23,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 15:47:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-07 15:47:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u_char~0~X~$Pointer$~TO~int [2021-11-07 15:47:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 15:47:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure type1_infoblock [2021-11-07 15:47:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure type1_infoblock [2021-11-07 15:47:23,126 INFO L130 BoogieDeclarations]: Found specification of procedure dc21140_infoleaf [2021-11-07 15:47:23,126 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21140_infoleaf [2021-11-07 15:47:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-07 15:47:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-07 15:47:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 15:47:23,127 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_init [2021-11-07 15:47:23,127 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_init [2021-11-07 15:47:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure srom_autoconf [2021-11-07 15:47:23,128 INFO L138 BoogieDeclarations]: Found implementation of procedure srom_autoconf [2021-11-07 15:47:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 15:47:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 15:47:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 15:47:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-07 15:47:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-07 15:47:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure de4x5_suspect_state [2021-11-07 15:47:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure de4x5_suspect_state [2021-11-07 15:47:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure compact_infoblock [2021-11-07 15:47:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure compact_infoblock [2021-11-07 15:47:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure dc21142_infoleaf [2021-11-07 15:47:23,130 INFO L138 BoogieDeclarations]: Found implementation of procedure dc21142_infoleaf [2021-11-07 15:47:23,130 INFO L130 BoogieDeclarations]: Found specification of procedure dc2114x_autoconf [2021-11-07 15:47:23,130 INFO L138 BoogieDeclarations]: Found implementation of procedure dc2114x_autoconf [2021-11-07 15:47:23,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 15:47:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-07 15:47:23,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 15:47:23,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 15:48:10,640 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 15:48:10,641 INFO L299 CfgBuilder]: Removed 22054 assume(true) statements. [2021-11-07 15:48:10,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:48:10 BoogieIcfgContainer [2021-11-07 15:48:10,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 15:48:10,658 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 15:48:10,658 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 15:48:10,661 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 15:48:10,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 03:47:14" (1/3) ... [2021-11-07 15:48:10,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33df29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:48:10, skipping insertion in model container [2021-11-07 15:48:10,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 03:47:17" (2/3) ... [2021-11-07 15:48:10,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33df29e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 03:48:10, skipping insertion in model container [2021-11-07 15:48:10,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 03:48:10" (3/3) ... [2021-11-07 15:48:10,664 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--dec--tulip--de4x5.ko-entry_point.cil.out.i [2021-11-07 15:48:10,670 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 15:48:10,670 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-11-07 15:48:10,753 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 15:48:10,761 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 [2021-11-07 15:48:10,761 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-11-07 15:48:10,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 17763 states, 17650 states have (on average 1.301643059490085) internal successors, (22974), 17659 states have internal predecessors, (22974), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-07 15:48:10,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 15:48:10,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:48:10,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:48:10,964 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting de4x5_openErr0ASSERT_VIOLATIONERROR_FUNCTION === [de4x5_openErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 15:48:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:48:10,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1334055758, now seen corresponding path program 1 times [2021-11-07 15:48:10,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:48:10,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012291395] [2021-11-07 15:48:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:48:10,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:48:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:48:11,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:48:11,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:48:11,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012291395] [2021-11-07 15:48:11,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012291395] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:48:11,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:48:11,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-07 15:48:11,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660337511] [2021-11-07 15:48:11,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:48:11,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 15:48:11,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:48:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 15:48:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 15:48:11,651 INFO L87 Difference]: Start difference. First operand has 17763 states, 17650 states have (on average 1.301643059490085) internal successors, (22974), 17659 states have internal predecessors, (22974), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) Second operand has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 15:48:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:48:12,301 INFO L93 Difference]: Finished difference Result 35069 states and 45744 transitions. [2021-11-07 15:48:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 15:48:12,303 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 15:48:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:48:12,438 INFO L225 Difference]: With dead ends: 35069 [2021-11-07 15:48:12,438 INFO L226 Difference]: Without dead ends: 17236 [2021-11-07 15:48:12,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 15:48:12,591 INFO L933 BasicCegarLoop]: 22351 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22351 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-07 15:48:12,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 22351 Invalid, 0 Unknown, 0 Unchecked, 39.31ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-07 15:48:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17236 states. [2021-11-07 15:48:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17236 to 17236. [2021-11-07 15:48:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17236 states, 17124 states have (on average 1.2874328427937398) internal successors, (22046), 17132 states have internal predecessors, (22046), 81 states have call successors, (81), 22 states have call predecessors, (81), 22 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2021-11-07 15:48:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17236 states to 17236 states and 22208 transitions. [2021-11-07 15:48:13,218 INFO L78 Accepts]: Start accepts. Automaton has 17236 states and 22208 transitions. Word has length 50 [2021-11-07 15:48:13,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:48:13,220 INFO L470 AbstractCegarLoop]: Abstraction has 17236 states and 22208 transitions. [2021-11-07 15:48:13,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 24.5) internal successors, (49), 2 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 15:48:13,223 INFO L276 IsEmpty]: Start isEmpty. Operand 17236 states and 22208 transitions. [2021-11-07 15:48:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 15:48:13,227 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:48:13,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:48:13,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 15:48:13,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting de4x5_openErr0ASSERT_VIOLATIONERROR_FUNCTION === [de4x5_openErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 15:48:13,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:48:13,230 INFO L85 PathProgramCache]: Analyzing trace with hash -978942790, now seen corresponding path program 1 times [2021-11-07 15:48:13,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:48:13,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232573350] [2021-11-07 15:48:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:48:13,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:48:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:48:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:48:13,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:48:13,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232573350] [2021-11-07 15:48:13,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232573350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:48:13,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:48:13,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:48:13,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371705236] [2021-11-07 15:48:13,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:48:13,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 15:48:13,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:48:13,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 15:48:13,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 15:48:13,544 INFO L87 Difference]: Start difference. First operand 17236 states and 22208 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 15:48:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:48:14,684 INFO L93 Difference]: Finished difference Result 50711 states and 65285 transitions. [2021-11-07 15:48:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 15:48:14,685 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-07 15:48:14,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:48:14,914 INFO L225 Difference]: With dead ends: 50711 [2021-11-07 15:48:14,915 INFO L226 Difference]: Without dead ends: 33500 [2021-11-07 15:48:15,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.28ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 15:48:15,041 INFO L933 BasicCegarLoop]: 22923 mSDtfsCounter, 20914 mSDsluCounter, 22105 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20914 SdHoareTripleChecker+Valid, 45028 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 87.46ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 136.36ms IncrementalHoareTripleChecker+Time [2021-11-07 15:48:15,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20914 Valid, 45028 Invalid, 76 Unknown, 0 Unchecked, 87.46ms Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 136.36ms Time] [2021-11-07 15:48:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33500 states. [2021-11-07 15:48:15,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33500 to 31559. [2021-11-07 15:48:15,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31559 states, 31345 states have (on average 1.2929334822140692) internal successors, (40527), 31353 states have internal predecessors, (40527), 161 states have call successors, (161), 44 states have call predecessors, (161), 44 states have return successors, (161), 161 states have call predecessors, (161), 161 states have call successors, (161) [2021-11-07 15:48:15,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31559 states to 31559 states and 40849 transitions. [2021-11-07 15:48:15,946 INFO L78 Accepts]: Start accepts. Automaton has 31559 states and 40849 transitions. Word has length 50 [2021-11-07 15:48:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:48:15,947 INFO L470 AbstractCegarLoop]: Abstraction has 31559 states and 40849 transitions. [2021-11-07 15:48:15,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 15:48:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 31559 states and 40849 transitions. [2021-11-07 15:48:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 15:48:15,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:48:15,953 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:48:15,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-07 15:48:15,954 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [de4x5_openErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 15:48:15,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:48:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash -41393822, now seen corresponding path program 1 times [2021-11-07 15:48:15,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:48:15,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108691890] [2021-11-07 15:48:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:48:15,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:48:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:48:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:48:16,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:48:16,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108691890] [2021-11-07 15:48:16,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108691890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:48:16,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:48:16,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:48:16,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650056922] [2021-11-07 15:48:16,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:48:16,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 15:48:16,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:48:16,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 15:48:16,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 15:48:16,223 INFO L87 Difference]: Start difference. First operand 31559 states and 40849 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 15:48:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:48:19,161 INFO L93 Difference]: Finished difference Result 107607 states and 139916 transitions. [2021-11-07 15:48:19,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 15:48:19,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 15:48:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:48:19,683 INFO L225 Difference]: With dead ends: 107607 [2021-11-07 15:48:19,683 INFO L226 Difference]: Without dead ends: 76073 [2021-11-07 15:48:19,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.22ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:48:19,902 INFO L933 BasicCegarLoop]: 34662 mSDtfsCounter, 28075 mSDsluCounter, 44583 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 84.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 28079 SdHoareTripleChecker+Valid, 79245 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 123.79ms SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.19ms IncrementalHoareTripleChecker+Time [2021-11-07 15:48:19,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28079 Valid, 79245 Invalid, 83 Unknown, 0 Unchecked, 123.79ms Time], IncrementalHoareTripleChecker [22 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 104.19ms Time] [2021-11-07 15:48:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76073 states. [2021-11-07 15:48:21,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76073 to 60345. [2021-11-07 15:48:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60345 states, 59926 states have (on average 1.2896739311817909) internal successors, (77285), 59934 states have internal predecessors, (77285), 322 states have call successors, (322), 88 states have call predecessors, (322), 88 states have return successors, (612), 322 states have call predecessors, (612), 322 states have call successors, (612) [2021-11-07 15:48:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60345 states to 60345 states and 78219 transitions. [2021-11-07 15:48:22,433 INFO L78 Accepts]: Start accepts. Automaton has 60345 states and 78219 transitions. Word has length 60 [2021-11-07 15:48:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:48:22,434 INFO L470 AbstractCegarLoop]: Abstraction has 60345 states and 78219 transitions. [2021-11-07 15:48:22,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 15:48:22,434 INFO L276 IsEmpty]: Start isEmpty. Operand 60345 states and 78219 transitions. [2021-11-07 15:48:22,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 15:48:22,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:48:22,438 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:48:22,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-07 15:48:22,439 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [de4x5_openErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 15:48:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:48:22,439 INFO L85 PathProgramCache]: Analyzing trace with hash 631590168, now seen corresponding path program 1 times [2021-11-07 15:48:22,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:48:22,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72928570] [2021-11-07 15:48:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:48:22,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:48:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:48:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:48:23,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:48:23,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72928570] [2021-11-07 15:48:23,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72928570] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:48:23,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:48:23,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:48:23,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945259449] [2021-11-07 15:48:23,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:48:23,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 15:48:23,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:48:23,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 15:48:23,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 15:48:23,020 INFO L87 Difference]: Start difference. First operand 60345 states and 78219 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 15:48:26,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 15:48:26,562 INFO L93 Difference]: Finished difference Result 207593 states and 270694 transitions. [2021-11-07 15:48:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 15:48:26,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 15:48:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 15:48:27,680 INFO L225 Difference]: With dead ends: 207593 [2021-11-07 15:48:27,681 INFO L226 Difference]: Without dead ends: 147273 [2021-11-07 15:48:27,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.26ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 15:48:27,952 INFO L933 BasicCegarLoop]: 28557 mSDtfsCounter, 34183 mSDsluCounter, 48465 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 34187 SdHoareTripleChecker+Valid, 77022 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 97.35ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 106.03ms IncrementalHoareTripleChecker+Time [2021-11-07 15:48:27,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34187 Valid, 77022 Invalid, 78 Unknown, 0 Unchecked, 97.35ms Time], IncrementalHoareTripleChecker [21 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 106.03ms Time] [2021-11-07 15:48:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147273 states. [2021-11-07 15:48:31,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147273 to 119965. [2021-11-07 15:48:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119965 states, 119136 states have (on average 1.2891821112006447) internal successors, (153588), 119144 states have internal predecessors, (153588), 644 states have call successors, (644), 176 states have call predecessors, (644), 176 states have return successors, (1949), 644 states have call predecessors, (1949), 644 states have call successors, (1949) [2021-11-07 15:48:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119965 states to 119965 states and 156181 transitions. [2021-11-07 15:48:32,322 INFO L78 Accepts]: Start accepts. Automaton has 119965 states and 156181 transitions. Word has length 61 [2021-11-07 15:48:32,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 15:48:32,322 INFO L470 AbstractCegarLoop]: Abstraction has 119965 states and 156181 transitions. [2021-11-07 15:48:32,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 15:48:32,323 INFO L276 IsEmpty]: Start isEmpty. Operand 119965 states and 156181 transitions. [2021-11-07 15:48:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 15:48:32,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-07 15:48:32,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 15:48:32,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-07 15:48:32,327 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [de4x5_openErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2021-11-07 15:48:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 15:48:32,328 INFO L85 PathProgramCache]: Analyzing trace with hash 179007938, now seen corresponding path program 1 times [2021-11-07 15:48:32,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 15:48:32,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413328798] [2021-11-07 15:48:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 15:48:32,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 15:48:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 15:48:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 15:48:32,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 15:48:32,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413328798] [2021-11-07 15:48:32,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413328798] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 15:48:32,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 15:48:32,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 15:48:32,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145004888] [2021-11-07 15:48:32,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-07 15:48:32,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 15:48:32,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 15:48:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 15:48:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 15:48:32,608 INFO L87 Difference]: Start difference. First operand 119965 states and 156181 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)