./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.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 a18a7daf593dd77ad555545ec10f677585469ecf569b445600fb5f502940bb67 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:37:39,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:37:39,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:37:39,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:37:39,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:37:39,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:37:39,975 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:37:39,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:37:39,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:37:39,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:37:39,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:37:39,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:37:39,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:37:39,982 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:37:39,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:37:39,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:37:39,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:37:39,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:37:39,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:37:39,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:37:39,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:37:39,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:37:39,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:37:39,994 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:37:39,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:37:39,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:37:39,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:37:39,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:37:39,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:37:39,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:37:39,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:37:39,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:37:40,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:37:40,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:37:40,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:37:40,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:37:40,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:37:40,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:37:40,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:37:40,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:37:40,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:37:40,008 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:37:40,030 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:37:40,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:37:40,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:37:40,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:37:40,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:37:40,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:37:40,033 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:37:40,033 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:37:40,033 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:37:40,033 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:37:40,034 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:37:40,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:37:40,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:37:40,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:37:40,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:37:40,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:37:40,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:37:40,035 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:37:40,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:37:40,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:37:40,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:37:40,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:37:40,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:37:40,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:37:40,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:37:40,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:37:40,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:37:40,037 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:37:40,037 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:37:40,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:37:40,038 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:37:40,038 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a18a7daf593dd77ad555545ec10f677585469ecf569b445600fb5f502940bb67 [2021-12-22 14:37:40,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:37:40,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:37:40,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:37:40,328 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:37:40,329 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:37:40,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i [2021-12-22 14:37:40,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a3cf2e/fcd3629084fc44f3b52eb353c220b293/FLAG464eac1cc [2021-12-22 14:37:41,075 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:37:41,076 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i [2021-12-22 14:37:41,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a3cf2e/fcd3629084fc44f3b52eb353c220b293/FLAG464eac1cc [2021-12-22 14:37:41,239 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/783a3cf2e/fcd3629084fc44f3b52eb353c220b293 [2021-12-22 14:37:41,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:37:41,244 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:37:41,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:37:41,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:37:41,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:37:41,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:37:41" (1/1) ... [2021-12-22 14:37:41,252 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39fde98d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:41, skipping insertion in model container [2021-12-22 14:37:41,252 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:37:41" (1/1) ... [2021-12-22 14:37:41,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:37:41,361 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:37:42,141 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i[161211,161224] [2021-12-22 14:37:42,709 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:37:42,740 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:37:42,862 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i[161211,161224] [2021-12-22 14:37:42,990 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:37:43,064 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:37:43,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43 WrapperNode [2021-12-22 14:37:43,065 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:37:43,067 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:37:43,067 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:37:43,067 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:37:43,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,243 INFO L137 Inliner]: procedures = 199, calls = 723, calls flagged for inlining = 106, calls inlined = 103, statements flattened = 2213 [2021-12-22 14:37:43,243 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:37:43,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:37:43,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:37:43,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:37:43,252 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,393 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,409 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:37:43,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:37:43,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:37:43,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:37:43,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (1/1) ... [2021-12-22 14:37:43,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:37:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:37:43,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:37:43,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:37:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:37:43,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:37:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure pci_release_regions [2021-12-22 14:37:43,502 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_release_regions [2021-12-22 14:37:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 14:37:43,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 14:37:43,502 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:37:43,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:37:43,503 INFO L130 BoogieDeclarations]: Found specification of procedure setup_descriptors [2021-12-22 14:37:43,503 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_descriptors [2021-12-22 14:37:43,503 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-22 14:37:43,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-22 14:37:43,504 INFO L130 BoogieDeclarations]: Found specification of procedure disable_all_interrupts [2021-12-22 14:37:43,504 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_all_interrupts [2021-12-22 14:37:43,504 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:37:43,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:37:43,504 INFO L130 BoogieDeclarations]: Found specification of procedure xircom_interrupt [2021-12-22 14:37:43,504 INFO L138 BoogieDeclarations]: Found implementation of procedure xircom_interrupt [2021-12-22 14:37:43,505 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 14:37:43,505 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 14:37:43,505 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:37:43,505 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:37:43,505 INFO L130 BoogieDeclarations]: Found specification of procedure ioread32 [2021-12-22 14:37:43,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ioread32 [2021-12-22 14:37:43,505 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-12-22 14:37:43,506 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-12-22 14:37:43,506 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-22 14:37:43,506 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-22 14:37:43,506 INFO L130 BoogieDeclarations]: Found specification of procedure investigate_write_descriptor [2021-12-22 14:37:43,506 INFO L138 BoogieDeclarations]: Found implementation of procedure investigate_write_descriptor [2021-12-22 14:37:43,506 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-12-22 14:37:43,506 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-12-22 14:37:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:37:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-12-22 14:37:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-12-22 14:37:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:37:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-12-22 14:37:43,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-12-22 14:37:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure iowrite32 [2021-12-22 14:37:43,508 INFO L138 BoogieDeclarations]: Found implementation of procedure iowrite32 [2021-12-22 14:37:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-12-22 14:37:43,508 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-12-22 14:37:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-22 14:37:43,508 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-22 14:37:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:37:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:37:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure investigate_read_descriptor [2021-12-22 14:37:43,509 INFO L138 BoogieDeclarations]: Found implementation of procedure investigate_read_descriptor [2021-12-22 14:37:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-12-22 14:37:43,510 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-12-22 14:37:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-12-22 14:37:43,510 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-12-22 14:37:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-12-22 14:37:43,510 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-12-22 14:37:43,510 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-12-22 14:37:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-12-22 14:37:43,511 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-22 14:37:43,512 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-22 14:37:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure trigger_transmit [2021-12-22 14:37:43,513 INFO L138 BoogieDeclarations]: Found implementation of procedure trigger_transmit [2021-12-22 14:37:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:37:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-22 14:37:43,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-22 14:37:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure pci_write_config_dword [2021-12-22 14:37:43,514 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_write_config_dword [2021-12-22 14:37:43,514 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-12-22 14:37:43,514 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-12-22 14:37:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:37:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-12-22 14:37:43,515 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-12-22 14:37:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:37:43,515 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-12-22 14:37:43,516 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-12-22 14:37:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:37:43,516 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:37:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure xircom_poll_controller [2021-12-22 14:37:43,516 INFO L138 BoogieDeclarations]: Found implementation of procedure xircom_poll_controller [2021-12-22 14:37:43,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:37:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure pci_disable_device [2021-12-22 14:37:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_disable_device [2021-12-22 14:37:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:37:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:37:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure receive_active [2021-12-22 14:37:43,517 INFO L138 BoogieDeclarations]: Found implementation of procedure receive_active [2021-12-22 14:37:43,517 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:37:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:37:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-22 14:37:43,518 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-22 14:37:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:37:43,518 INFO L130 BoogieDeclarations]: Found specification of procedure transmit_active [2021-12-22 14:37:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit_active [2021-12-22 14:37:43,519 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_irq_1 [2021-12-22 14:37:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_irq_1 [2021-12-22 14:37:43,519 INFO L130 BoogieDeclarations]: Found specification of procedure trigger_receive [2021-12-22 14:37:43,519 INFO L138 BoogieDeclarations]: Found implementation of procedure trigger_receive [2021-12-22 14:37:43,520 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-12-22 14:37:43,520 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-12-22 14:37:43,520 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-12-22 14:37:43,521 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-12-22 14:37:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-12-22 14:37:43,521 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-12-22 14:37:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:37:43,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:37:43,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:37:43,997 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:37:43,999 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:37:44,195 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 14:37:45,334 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:37:45,351 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:37:45,352 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-22 14:37:45,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:37:45 BoogieIcfgContainer [2021-12-22 14:37:45,355 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:37:45,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:37:45,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:37:45,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:37:45,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:37:41" (1/3) ... [2021-12-22 14:37:45,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a78e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:37:45, skipping insertion in model container [2021-12-22 14:37:45,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:37:43" (2/3) ... [2021-12-22 14:37:45,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a78e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:37:45, skipping insertion in model container [2021-12-22 14:37:45,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:37:45" (3/3) ... [2021-12-22 14:37:45,362 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--dec--tulip--xircom_cb.ko-entry_point.cil.out.i [2021-12-22 14:37:45,366 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:37:45,366 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:37:45,407 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:37:45,413 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:37:45,413 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:37:45,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 798 states, 554 states have (on average 1.3068592057761732) internal successors, (724), 569 states have internal predecessors, (724), 199 states have call successors, (199), 44 states have call predecessors, (199), 43 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) [2021-12-22 14:37:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-22 14:37:45,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:37:45,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:37:45,449 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:37:45,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:37:45,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1359452381, now seen corresponding path program 1 times [2021-12-22 14:37:45,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:37:45,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365591401] [2021-12-22 14:37:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:45,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:37:45,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:45,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:37:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:45,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:45,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:45,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:45,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:37:45,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:37:45,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365591401] [2021-12-22 14:37:45,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365591401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:37:45,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:37:45,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:37:45,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165275904] [2021-12-22 14:37:45,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:37:45,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:37:45,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:37:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:37:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:37:45,877 INFO L87 Difference]: Start difference. First operand has 798 states, 554 states have (on average 1.3068592057761732) internal successors, (724), 569 states have internal predecessors, (724), 199 states have call successors, (199), 44 states have call predecessors, (199), 43 states have return successors, (193), 192 states have call predecessors, (193), 193 states have call successors, (193) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:37:48,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:37:48,088 INFO L93 Difference]: Finished difference Result 2457 states and 3514 transitions. [2021-12-22 14:37:48,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:37:48,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2021-12-22 14:37:48,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:37:48,112 INFO L225 Difference]: With dead ends: 2457 [2021-12-22 14:37:48,113 INFO L226 Difference]: Without dead ends: 1638 [2021-12-22 14:37:48,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:37:48,126 INFO L933 BasicCegarLoop]: 1235 mSDtfsCounter, 1340 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 2572 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:37:48,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 2572 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 14:37:48,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-12-22 14:37:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1540. [2021-12-22 14:37:48,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1074 states have (on average 1.2793296089385475) internal successors, (1374), 1088 states have internal predecessors, (1374), 381 states have call successors, (381), 85 states have call predecessors, (381), 84 states have return successors, (380), 378 states have call predecessors, (380), 380 states have call successors, (380) [2021-12-22 14:37:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 2135 transitions. [2021-12-22 14:37:48,275 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 2135 transitions. Word has length 35 [2021-12-22 14:37:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:37:48,276 INFO L470 AbstractCegarLoop]: Abstraction has 1540 states and 2135 transitions. [2021-12-22 14:37:48,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:37:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 2135 transitions. [2021-12-22 14:37:48,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-22 14:37:48,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:37:48,280 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:37:48,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:37:48,281 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:37:48,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:37:48,282 INFO L85 PathProgramCache]: Analyzing trace with hash -241261671, now seen corresponding path program 1 times [2021-12-22 14:37:48,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:37:48,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485780009] [2021-12-22 14:37:48,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:48,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:37:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:48,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:37:48,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:48,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:48,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:48,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:37:48,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:37:48,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485780009] [2021-12-22 14:37:48,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485780009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:37:48,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:37:48,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:37:48,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304961064] [2021-12-22 14:37:48,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:37:48,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:37:48,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:37:48,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:37:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:37:48,437 INFO L87 Difference]: Start difference. First operand 1540 states and 2135 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:37:51,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:37:51,004 INFO L93 Difference]: Finished difference Result 4789 states and 6734 transitions. [2021-12-22 14:37:51,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:37:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2021-12-22 14:37:51,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:37:51,032 INFO L225 Difference]: With dead ends: 4789 [2021-12-22 14:37:51,032 INFO L226 Difference]: Without dead ends: 3254 [2021-12-22 14:37:51,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:37:51,047 INFO L933 BasicCegarLoop]: 1226 mSDtfsCounter, 1307 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 489 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1484 SdHoareTripleChecker+Valid, 4671 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 489 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:37:51,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1484 Valid, 4671 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [489 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-22 14:37:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2021-12-22 14:37:51,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 3086. [2021-12-22 14:37:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3086 states, 2151 states have (on average 1.2794049279404929) internal successors, (2752), 2183 states have internal predecessors, (2752), 758 states have call successors, (758), 169 states have call predecessors, (758), 176 states have return successors, (802), 755 states have call predecessors, (802), 757 states have call successors, (802) [2021-12-22 14:37:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3086 states to 3086 states and 4312 transitions. [2021-12-22 14:37:51,225 INFO L78 Accepts]: Start accepts. Automaton has 3086 states and 4312 transitions. Word has length 38 [2021-12-22 14:37:51,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:37:51,227 INFO L470 AbstractCegarLoop]: Abstraction has 3086 states and 4312 transitions. [2021-12-22 14:37:51,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:37:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3086 states and 4312 transitions. [2021-12-22 14:37:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-22 14:37:51,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:37:51,245 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:37:51,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:37:51,246 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:37:51,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:37:51,247 INFO L85 PathProgramCache]: Analyzing trace with hash -832829450, now seen corresponding path program 1 times [2021-12-22 14:37:51,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:37:51,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483103176] [2021-12-22 14:37:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:51,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:37:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:37:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:51,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:37:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:51,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-12-22 14:37:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:37:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 14:37:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:37:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:51,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:37:51,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:51,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 14:37:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-22 14:37:51,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:37:51,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483103176] [2021-12-22 14:37:51,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483103176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:37:51,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:37:51,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 14:37:51,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222645257] [2021-12-22 14:37:51,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:37:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 14:37:51,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:37:51,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 14:37:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 14:37:51,586 INFO L87 Difference]: Start difference. First operand 3086 states and 4312 transitions. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:37:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:37:53,845 INFO L93 Difference]: Finished difference Result 8394 states and 11721 transitions. [2021-12-22 14:37:53,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:37:53,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 143 [2021-12-22 14:37:53,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:37:53,873 INFO L225 Difference]: With dead ends: 8394 [2021-12-22 14:37:53,873 INFO L226 Difference]: Without dead ends: 5318 [2021-12-22 14:37:53,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:37:53,890 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1359 mSDsluCounter, 2148 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1466 SdHoareTripleChecker+Valid, 3231 SdHoareTripleChecker+Invalid, 1694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:37:53,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1466 Valid, 3231 Invalid, 1694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 14:37:53,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5318 states. [2021-12-22 14:37:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5318 to 4930. [2021-12-22 14:37:54,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 3493 states have (on average 1.2719725164614943) internal successors, (4443), 3561 states have internal predecessors, (4443), 1108 states have call successors, (1108), 309 states have call predecessors, (1108), 328 states have return successors, (1187), 1095 states have call predecessors, (1187), 1107 states have call successors, (1187) [2021-12-22 14:37:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 6738 transitions. [2021-12-22 14:37:54,167 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 6738 transitions. Word has length 143 [2021-12-22 14:37:54,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:37:54,169 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 6738 transitions. [2021-12-22 14:37:54,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 4 states have internal predecessors, (95), 2 states have call successors, (17), 4 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:37:54,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 6738 transitions. [2021-12-22 14:37:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-12-22 14:37:54,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:37:54,175 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-22 14:37:54,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:37:54,175 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:37:54,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:37:54,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1350491809, now seen corresponding path program 1 times [2021-12-22 14:37:54,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:37:54,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503450353] [2021-12-22 14:37:54,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:54,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:37:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:37:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 14:37:54,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:37:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:54,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:54,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:37:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 14:37:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 14:37:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:37:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:37:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:37:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-22 14:37:54,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:37:54,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503450353] [2021-12-22 14:37:54,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503450353] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:37:54,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168430788] [2021-12-22 14:37:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:54,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:37:54,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:37:54,559 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) [2021-12-22 14:37:54,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 14:37:54,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:55,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 1456 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 14:37:55,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:37:55,425 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-22 14:37:55,426 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:37:55,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168430788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:37:55,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:37:55,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2021-12-22 14:37:55,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555267539] [2021-12-22 14:37:55,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:37:55,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:37:55,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:37:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:37:55,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:37:55,430 INFO L87 Difference]: Start difference. First operand 4930 states and 6738 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:37:56,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:37:56,505 INFO L93 Difference]: Finished difference Result 14778 states and 20208 transitions. [2021-12-22 14:37:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:37:56,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 139 [2021-12-22 14:37:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:37:56,562 INFO L225 Difference]: With dead ends: 14778 [2021-12-22 14:37:56,563 INFO L226 Difference]: Without dead ends: 9858 [2021-12-22 14:37:56,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:37:56,591 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 986 mSDsluCounter, 2729 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 990 SdHoareTripleChecker+Valid, 4094 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:37:56,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [990 Valid, 4094 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 14:37:56,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9858 states. [2021-12-22 14:37:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9858 to 9850. [2021-12-22 14:37:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9850 states, 6977 states have (on average 1.2723233481439014) internal successors, (8877), 7117 states have internal predecessors, (8877), 2212 states have call successors, (2212), 617 states have call predecessors, (2212), 660 states have return successors, (2375), 2187 states have call predecessors, (2375), 2211 states have call successors, (2375) [2021-12-22 14:37:57,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9850 states to 9850 states and 13464 transitions. [2021-12-22 14:37:57,103 INFO L78 Accepts]: Start accepts. Automaton has 9850 states and 13464 transitions. Word has length 139 [2021-12-22 14:37:57,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:37:57,106 INFO L470 AbstractCegarLoop]: Abstraction has 9850 states and 13464 transitions. [2021-12-22 14:37:57,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 4 states have internal predecessors, (93), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:37:57,107 INFO L276 IsEmpty]: Start isEmpty. Operand 9850 states and 13464 transitions. [2021-12-22 14:37:57,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-22 14:37:57,112 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:37:57,112 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:37:57,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 14:37:57,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:37:57,332 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:37:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:37:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1890485240, now seen corresponding path program 1 times [2021-12-22 14:37:57,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:37:57,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623409587] [2021-12-22 14:37:57,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:57,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:37:57,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:37:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:57,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:57,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 14:37:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:37:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:37:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:37:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:37:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 14:37:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 14:37:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:37:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:37:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:37:57,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:37:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-22 14:37:57,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:37:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623409587] [2021-12-22 14:37:57,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623409587] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:37:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812283764] [2021-12-22 14:37:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:37:57,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:37:57,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:37:57,677 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) [2021-12-22 14:37:57,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 14:37:58,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:37:58,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 1452 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 14:37:58,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:37:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-22 14:37:58,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:37:58,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812283764] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:37:58,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:37:58,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2021-12-22 14:37:58,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227826741] [2021-12-22 14:37:58,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:37:58,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:37:58,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:37:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:37:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:37:58,574 INFO L87 Difference]: Start difference. First operand 9850 states and 13464 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:37:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:37:59,976 INFO L93 Difference]: Finished difference Result 29538 states and 40386 transitions. [2021-12-22 14:37:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:37:59,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 137 [2021-12-22 14:37:59,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:38:00,103 INFO L225 Difference]: With dead ends: 29538 [2021-12-22 14:38:00,103 INFO L226 Difference]: Without dead ends: 19698 [2021-12-22 14:38:00,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:38:00,153 INFO L933 BasicCegarLoop]: 1365 mSDtfsCounter, 978 mSDsluCounter, 2732 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 4097 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:38:00,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [982 Valid, 4097 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 14:38:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19698 states. [2021-12-22 14:38:01,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19698 to 19690. [2021-12-22 14:38:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19690 states, 13945 states have (on average 1.2724991036213698) internal successors, (17745), 14229 states have internal predecessors, (17745), 4420 states have call successors, (4420), 1233 states have call predecessors, (4420), 1324 states have return successors, (4739), 4371 states have call predecessors, (4739), 4419 states have call successors, (4739) [2021-12-22 14:38:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19690 states to 19690 states and 26904 transitions. [2021-12-22 14:38:01,157 INFO L78 Accepts]: Start accepts. Automaton has 19690 states and 26904 transitions. Word has length 137 [2021-12-22 14:38:01,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:38:01,157 INFO L470 AbstractCegarLoop]: Abstraction has 19690 states and 26904 transitions. [2021-12-22 14:38:01,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 4 states have internal predecessors, (91), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:38:01,158 INFO L276 IsEmpty]: Start isEmpty. Operand 19690 states and 26904 transitions. [2021-12-22 14:38:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-22 14:38:01,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:38:01,163 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-22 14:38:01,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 14:38:01,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:38:01,386 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:38:01,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:38:01,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1553717310, now seen corresponding path program 1 times [2021-12-22 14:38:01,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:38:01,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917612275] [2021-12-22 14:38:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:38:01,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:38:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:38:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:38:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:38:01,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 14:38:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:38:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:38:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:38:01,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:38:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 14:38:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 14:38:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:38:01,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:38:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:38:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-22 14:38:01,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:38:01,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917612275] [2021-12-22 14:38:01,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917612275] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:38:01,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313863255] [2021-12-22 14:38:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:38:01,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:38:01,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:38:01,710 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:38:01,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 14:38:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:02,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 14:38:02,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:38:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-22 14:38:02,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:38:02,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313863255] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:38:02,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:38:02,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2021-12-22 14:38:02,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160391250] [2021-12-22 14:38:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:38:02,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:38:02,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:38:02,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:38:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:38:02,508 INFO L87 Difference]: Start difference. First operand 19690 states and 26904 transitions. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:38:04,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:38:04,543 INFO L93 Difference]: Finished difference Result 59058 states and 80706 transitions. [2021-12-22 14:38:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:38:04,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 138 [2021-12-22 14:38:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:38:04,745 INFO L225 Difference]: With dead ends: 59058 [2021-12-22 14:38:04,745 INFO L226 Difference]: Without dead ends: 39378 [2021-12-22 14:38:04,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:38:04,831 INFO L933 BasicCegarLoop]: 1258 mSDtfsCounter, 987 mSDsluCounter, 2433 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 991 SdHoareTripleChecker+Valid, 3691 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:38:04,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [991 Valid, 3691 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 14:38:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39378 states. [2021-12-22 14:38:06,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39378 to 39370. [2021-12-22 14:38:06,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39370 states, 27881 states have (on average 1.2725870664610308) internal successors, (35481), 28453 states have internal predecessors, (35481), 8836 states have call successors, (8836), 2465 states have call predecessors, (8836), 2652 states have return successors, (9443), 8739 states have call predecessors, (9443), 8835 states have call successors, (9443) [2021-12-22 14:38:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39370 states to 39370 states and 53760 transitions. [2021-12-22 14:38:06,554 INFO L78 Accepts]: Start accepts. Automaton has 39370 states and 53760 transitions. Word has length 138 [2021-12-22 14:38:06,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:38:06,555 INFO L470 AbstractCegarLoop]: Abstraction has 39370 states and 53760 transitions. [2021-12-22 14:38:06,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 4 states have internal predecessors, (92), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:38:06,556 INFO L276 IsEmpty]: Start isEmpty. Operand 39370 states and 53760 transitions. [2021-12-22 14:38:06,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-22 14:38:06,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:38:06,561 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-22 14:38:06,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 14:38:06,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:38:06,775 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:38:06,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:38:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -741737467, now seen corresponding path program 1 times [2021-12-22 14:38:06,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:38:06,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13194923] [2021-12-22 14:38:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:38:06,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:38:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:06,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:38:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:06,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:38:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:06,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:38:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:06,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:38:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:06,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:38:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:06,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:38:07,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:38:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:38:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 14:38:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 14:38:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:38:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:38:07,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:38:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-22 14:38:07,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:38:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13194923] [2021-12-22 14:38:07,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13194923] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:38:07,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883057340] [2021-12-22 14:38:07,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:38:07,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:38:07,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:38:07,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:38:07,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 14:38:07,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:07,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1450 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 14:38:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:38:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-22 14:38:08,085 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:38:08,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883057340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:38:08,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:38:08,086 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2021-12-22 14:38:08,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506785868] [2021-12-22 14:38:08,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:38:08,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:38:08,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:38:08,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:38:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:38:08,088 INFO L87 Difference]: Start difference. First operand 39370 states and 53760 transitions. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:38:11,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:38:11,070 INFO L93 Difference]: Finished difference Result 118098 states and 161274 transitions. [2021-12-22 14:38:11,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:38:11,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 136 [2021-12-22 14:38:11,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:38:11,425 INFO L225 Difference]: With dead ends: 118098 [2021-12-22 14:38:11,425 INFO L226 Difference]: Without dead ends: 78174 [2021-12-22 14:38:11,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-12-22 14:38:11,544 INFO L933 BasicCegarLoop]: 1303 mSDtfsCounter, 985 mSDsluCounter, 2655 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 3958 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:38:11,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [989 Valid, 3958 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 14:38:11,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78174 states. [2021-12-22 14:38:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78174 to 77908. [2021-12-22 14:38:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77908 states, 55063 states have (on average 1.2739044367361023) internal successors, (70145), 56451 states have internal predecessors, (70145), 17590 states have call successors, (17590), 4891 states have call predecessors, (17590), 5254 states have return successors, (18706), 17139 states have call predecessors, (18706), 17589 states have call successors, (18706) [2021-12-22 14:38:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77908 states to 77908 states and 106441 transitions. [2021-12-22 14:38:14,783 INFO L78 Accepts]: Start accepts. Automaton has 77908 states and 106441 transitions. Word has length 136 [2021-12-22 14:38:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:38:14,784 INFO L470 AbstractCegarLoop]: Abstraction has 77908 states and 106441 transitions. [2021-12-22 14:38:14,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 4 states have internal predecessors, (90), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 14:38:14,785 INFO L276 IsEmpty]: Start isEmpty. Operand 77908 states and 106441 transitions. [2021-12-22 14:38:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-22 14:38:14,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:38:14,790 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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] [2021-12-22 14:38:14,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 14:38:15,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:38:15,004 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:38:15,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:38:15,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1817425076, now seen corresponding path program 1 times [2021-12-22 14:38:15,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:38:15,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543529740] [2021-12-22 14:38:15,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:38:15,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:38:15,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:38:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:38:15,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:38:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 14:38:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:38:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:38:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:15,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:38:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:38:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:38:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-22 14:38:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 14:38:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 14:38:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 14:38:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:38:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2021-12-22 14:38:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,333 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-22 14:38:15,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:38:15,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543529740] [2021-12-22 14:38:15,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543529740] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:38:15,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993687679] [2021-12-22 14:38:15,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:38:15,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:38:15,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:38:15,336 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:38:15,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 14:38:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:38:15,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 14:38:15,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:38:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-22 14:38:16,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:38:16,633 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-22 14:38:16,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993687679] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:38:16,633 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:38:16,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 20 [2021-12-22 14:38:16,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640619877] [2021-12-22 14:38:16,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:38:16,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 14:38:16,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:38:16,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 14:38:16,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-12-22 14:38:16,636 INFO L87 Difference]: Start difference. First operand 77908 states and 106441 transitions. Second operand has 20 states, 20 states have (on average 10.0) internal successors, (200), 14 states have internal predecessors, (200), 7 states have call successors, (41), 7 states have call predecessors, (41), 7 states have return successors, (39), 9 states have call predecessors, (39), 7 states have call successors, (39) [2021-12-22 14:38:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:38:27,941 INFO L93 Difference]: Finished difference Result 231100 states and 326264 transitions. [2021-12-22 14:38:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-22 14:38:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 10.0) internal successors, (200), 14 states have internal predecessors, (200), 7 states have call successors, (41), 7 states have call predecessors, (41), 7 states have return successors, (39), 9 states have call predecessors, (39), 7 states have call successors, (39) Word has length 148 [2021-12-22 14:38:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:38:28,833 INFO L225 Difference]: With dead ends: 231100 [2021-12-22 14:38:28,833 INFO L226 Difference]: Without dead ends: 152356 [2021-12-22 14:38:29,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 14:38:29,202 INFO L933 BasicCegarLoop]: 1917 mSDtfsCounter, 1861 mSDsluCounter, 19455 mSDsCounter, 0 mSdLazyCounter, 8614 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2234 SdHoareTripleChecker+Valid, 21372 SdHoareTripleChecker+Invalid, 9228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 8614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:38:29,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2234 Valid, 21372 Invalid, 9228 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [614 Valid, 8614 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-22 14:38:29,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152356 states.