./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.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 dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 12:46:10,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 12:46:10,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 12:46:10,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 12:46:10,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 12:46:10,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 12:46:10,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 12:46:10,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 12:46:10,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 12:46:10,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 12:46:10,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 12:46:10,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 12:46:10,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 12:46:10,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 12:46:10,330 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 12:46:10,331 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 12:46:10,332 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 12:46:10,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 12:46:10,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 12:46:10,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 12:46:10,336 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 12:46:10,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 12:46:10,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 12:46:10,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 12:46:10,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 12:46:10,341 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 12:46:10,342 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 12:46:10,342 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 12:46:10,343 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 12:46:10,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 12:46:10,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 12:46:10,344 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 12:46:10,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 12:46:10,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 12:46:10,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 12:46:10,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 12:46:10,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 12:46:10,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 12:46:10,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 12:46:10,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 12:46:10,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 12:46:10,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 12:46:10,349 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-12 12:46:10,364 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 12:46:10,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 12:46:10,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 12:46:10,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 12:46:10,366 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 12:46:10,366 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 12:46:10,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 12:46:10,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 12:46:10,367 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 12:46:10,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 12:46:10,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 12:46:10,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 12:46:10,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 12:46:10,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 12:46:10,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 12:46:10,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 12:46:10,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 12:46:10,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 12:46:10,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 12:46:10,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 12:46:10,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 12:46:10,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 12:46:10,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 12:46:10,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 12:46:10,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 12:46:10,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 12:46:10,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 12:46:10,370 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 12:46:10,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 12:46:10,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 12:46:10,370 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2022-07-12 12:46:10,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 12:46:10,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 12:46:10,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 12:46:10,563 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 12:46:10,564 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 12:46:10,565 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-07-12 12:46:10,629 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81495e0e1/c5a0eb7a5a5c4edf985b6348e1ced6f1/FLAG33fb259cd [2022-07-12 12:46:11,229 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 12:46:11,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-07-12 12:46:11,272 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81495e0e1/c5a0eb7a5a5c4edf985b6348e1ced6f1/FLAG33fb259cd [2022-07-12 12:46:11,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81495e0e1/c5a0eb7a5a5c4edf985b6348e1ced6f1 [2022-07-12 12:46:11,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 12:46:11,422 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 12:46:11,424 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 12:46:11,424 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 12:46:11,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 12:46:11,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 12:46:11" (1/1) ... [2022-07-12 12:46:11,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75cf095c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:11, skipping insertion in model container [2022-07-12 12:46:11,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 12:46:11" (1/1) ... [2022-07-12 12:46:11,433 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 12:46:11,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 12:46:11,842 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2022-07-12 12:46:11,843 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2022-07-12 12:46:11,971 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-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2022-07-12 12:46:12,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 12:46:12,603 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 12:46:12,705 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2022-07-12 12:46:12,706 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2022-07-12 12:46:12,712 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-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2022-07-12 12:46:12,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 12:46:12,931 INFO L208 MainTranslator]: Completed translation [2022-07-12 12:46:12,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12 WrapperNode [2022-07-12 12:46:12,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 12:46:12,933 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 12:46:12,933 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 12:46:12,933 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 12:46:12,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,011 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,101 INFO L137 Inliner]: procedures = 202, calls = 1968, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2095 [2022-07-12 12:46:13,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 12:46:13,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 12:46:13,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 12:46:13,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 12:46:13,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,223 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,229 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 12:46:13,277 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 12:46:13,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 12:46:13,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 12:46:13,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (1/1) ... [2022-07-12 12:46:13,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 12:46:13,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 12:46:13,325 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) [2022-07-12 12:46:13,343 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 [2022-07-12 12:46:13,354 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2022-07-12 12:46:13,354 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2022-07-12 12:46:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-07-12 12:46:13,355 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-07-12 12:46:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-12 12:46:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-12 12:46:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-12 12:46:13,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-12 12:46:13,355 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-07-12 12:46:13,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-07-12 12:46:13,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-12 12:46:13,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-12 12:46:13,356 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-12 12:46:13,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-12 12:46:13,356 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-12 12:46:13,356 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-12 12:46:13,356 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2022-07-12 12:46:13,356 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2022-07-12 12:46:13,357 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-12 12:46:13,357 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-12 12:46:13,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 12:46:13,357 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-12 12:46:13,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-07-12 12:46:13,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-07-12 12:46:13,357 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-12 12:46:13,357 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-12 12:46:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2022-07-12 12:46:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2022-07-12 12:46:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 12:46:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-12 12:46:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-07-12 12:46:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-07-12 12:46:13,358 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-07-12 12:46:13,358 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-07-12 12:46:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2022-07-12 12:46:13,359 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2022-07-12 12:46:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-07-12 12:46:13,359 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-07-12 12:46:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-12 12:46:13,359 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-12 12:46:13,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-12 12:46:13,360 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2022-07-12 12:46:13,360 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2022-07-12 12:46:13,360 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2022-07-12 12:46:13,360 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2022-07-12 12:46:13,360 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-07-12 12:46:13,360 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-07-12 12:46:13,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-12 12:46:13,361 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2022-07-12 12:46:13,362 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2022-07-12 12:46:13,362 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2022-07-12 12:46:13,362 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2022-07-12 12:46:13,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 12:46:13,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-12 12:46:13,363 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-12 12:46:13,363 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2022-07-12 12:46:13,364 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2022-07-12 12:46:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-07-12 12:46:13,364 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-07-12 12:46:13,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-07-12 12:46:13,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-07-12 12:46:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-07-12 12:46:13,365 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-07-12 12:46:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 12:46:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2022-07-12 12:46:13,365 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2022-07-12 12:46:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 12:46:13,365 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-12 12:46:13,366 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-12 12:46:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 12:46:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2022-07-12 12:46:13,366 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2022-07-12 12:46:13,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-12 12:46:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2022-07-12 12:46:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2022-07-12 12:46:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2022-07-12 12:46:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2022-07-12 12:46:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2022-07-12 12:46:13,367 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2022-07-12 12:46:13,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 12:46:13,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 12:46:13,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 12:46:13,667 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 12:46:13,669 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 12:46:13,996 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-12 12:46:17,470 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 12:46:17,484 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 12:46:17,485 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 12:46:17,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 12:46:17 BoogieIcfgContainer [2022-07-12 12:46:17,488 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 12:46:17,490 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 12:46:17,490 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 12:46:17,493 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 12:46:17,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 12:46:11" (1/3) ... [2022-07-12 12:46:17,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fd9dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 12:46:17, skipping insertion in model container [2022-07-12 12:46:17,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:46:12" (2/3) ... [2022-07-12 12:46:17,494 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29fd9dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 12:46:17, skipping insertion in model container [2022-07-12 12:46:17,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 12:46:17" (3/3) ... [2022-07-12 12:46:17,495 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2022-07-12 12:46:17,504 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 12:46:17,504 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 12:46:17,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 12:46:17,544 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@790b4b14, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@652219f5 [2022-07-12 12:46:17,544 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 12:46:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-12 12:46:17,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-12 12:46:17,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:46:17,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 12:46:17,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:46:17,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:46:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2015975527, now seen corresponding path program 1 times [2022-07-12 12:46:17,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:46:17,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402807868] [2022-07-12 12:46:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:46:17,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:46:17,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:17,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:46:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:18,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 12:46:18,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:46:18,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402807868] [2022-07-12 12:46:18,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402807868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:46:18,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:46:18,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 12:46:18,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367103348] [2022-07-12 12:46:18,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:46:18,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 12:46:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:46:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 12:46:18,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 12:46:18,056 INFO L87 Difference]: Start difference. First operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 12:46:21,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:46:21,495 INFO L93 Difference]: Finished difference Result 1083 states and 1544 transitions. [2022-07-12 12:46:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 12:46:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-07-12 12:46:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:46:21,513 INFO L225 Difference]: With dead ends: 1083 [2022-07-12 12:46:21,513 INFO L226 Difference]: Without dead ends: 563 [2022-07-12 12:46:21,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 12:46:21,528 INFO L413 NwaCegarLoop]: 640 mSDtfsCounter, 216 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1246 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-12 12:46:21,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 1246 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 599 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2022-07-12 12:46:21,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-12 12:46:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2022-07-12 12:46:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 385 states have (on average 1.3428571428571427) internal successors, (517), 389 states have internal predecessors, (517), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-12 12:46:21,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 702 transitions. [2022-07-12 12:46:21,619 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 702 transitions. Word has length 30 [2022-07-12 12:46:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:46:21,619 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 702 transitions. [2022-07-12 12:46:21,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-12 12:46:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 702 transitions. [2022-07-12 12:46:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-12 12:46:21,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:46:21,622 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 12:46:21,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 12:46:21,623 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:46:21,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:46:21,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1592596621, now seen corresponding path program 1 times [2022-07-12 12:46:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:46:21,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685080809] [2022-07-12 12:46:21,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:46:21,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:46:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:21,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:46:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:21,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:46:21,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 12:46:21,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:46:21,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685080809] [2022-07-12 12:46:21,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685080809] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:46:21,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:46:21,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 12:46:21,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961888134] [2022-07-12 12:46:21,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:46:21,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 12:46:21,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:46:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 12:46:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 12:46:21,791 INFO L87 Difference]: Start difference. First operand 512 states and 702 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 12:46:25,251 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:46:25,418 INFO L93 Difference]: Finished difference Result 1067 states and 1492 transitions. [2022-07-12 12:46:25,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 12:46:25,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2022-07-12 12:46:25,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:46:25,424 INFO L225 Difference]: With dead ends: 1067 [2022-07-12 12:46:25,424 INFO L226 Difference]: Without dead ends: 571 [2022-07-12 12:46:25,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 12:46:25,431 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 173 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-12 12:46:25,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1217 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 592 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2022-07-12 12:46:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-07-12 12:46:25,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 519. [2022-07-12 12:46:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 392 states have (on average 1.344387755102041) internal successors, (527), 396 states have internal predecessors, (527), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2022-07-12 12:46:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 712 transitions. [2022-07-12 12:46:25,461 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 712 transitions. Word has length 49 [2022-07-12 12:46:25,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:46:25,462 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 712 transitions. [2022-07-12 12:46:25,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 12:46:25,462 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 712 transitions. [2022-07-12 12:46:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-12 12:46:25,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:46:25,464 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 12:46:25,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 12:46:25,465 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:46:25,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:46:25,465 INFO L85 PathProgramCache]: Analyzing trace with hash -725279773, now seen corresponding path program 1 times [2022-07-12 12:46:25,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:46:25,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207067656] [2022-07-12 12:46:25,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:46:25,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:46:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:25,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:46:25,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:25,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:46:25,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 12:46:25,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:46:25,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207067656] [2022-07-12 12:46:25,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207067656] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:46:25,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:46:25,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 12:46:25,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788621113] [2022-07-12 12:46:25,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:46:25,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 12:46:25,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:46:25,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 12:46:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 12:46:25,632 INFO L87 Difference]: Start difference. First operand 519 states and 712 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 12:46:28,753 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:46:28,888 INFO L93 Difference]: Finished difference Result 1115 states and 1567 transitions. [2022-07-12 12:46:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 12:46:28,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2022-07-12 12:46:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:46:28,892 INFO L225 Difference]: With dead ends: 1115 [2022-07-12 12:46:28,893 INFO L226 Difference]: Without dead ends: 612 [2022-07-12 12:46:28,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 12:46:28,895 INFO L413 NwaCegarLoop]: 625 mSDtfsCounter, 222 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 12:46:28,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1218 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 598 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2022-07-12 12:46:28,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-07-12 12:46:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 560. [2022-07-12 12:46:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 431 states have (on average 1.359628770301624) internal successors, (586), 435 states have internal predecessors, (586), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-12 12:46:28,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 775 transitions. [2022-07-12 12:46:28,916 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 775 transitions. Word has length 55 [2022-07-12 12:46:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:46:28,916 INFO L495 AbstractCegarLoop]: Abstraction has 560 states and 775 transitions. [2022-07-12 12:46:28,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-12 12:46:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 775 transitions. [2022-07-12 12:46:28,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-12 12:46:28,920 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:46:28,920 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 12:46:28,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 12:46:28,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:46:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:46:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash -232463337, now seen corresponding path program 1 times [2022-07-12 12:46:28,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:46:28,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820979632] [2022-07-12 12:46:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:46:28,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:46:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:29,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:46:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:29,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:46:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:29,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 12:46:29,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:29,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 12:46:29,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:46:29,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820979632] [2022-07-12 12:46:29,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820979632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:46:29,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:46:29,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 12:46:29,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904800093] [2022-07-12 12:46:29,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:46:29,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 12:46:29,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:46:29,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 12:46:29,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 12:46:29,112 INFO L87 Difference]: Start difference. First operand 560 states and 775 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 12:46:33,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:35,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:35,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:46:35,796 INFO L93 Difference]: Finished difference Result 1531 states and 2229 transitions. [2022-07-12 12:46:35,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 12:46:35,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2022-07-12 12:46:35,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:46:35,801 INFO L225 Difference]: With dead ends: 1531 [2022-07-12 12:46:35,801 INFO L226 Difference]: Without dead ends: 987 [2022-07-12 12:46:35,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 12:46:35,805 INFO L413 NwaCegarLoop]: 635 mSDtfsCounter, 701 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 346 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 1387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-07-12 12:46:35,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 1442 Invalid, 1387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 1039 Invalid, 2 Unknown, 0 Unchecked, 6.6s Time] [2022-07-12 12:46:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-07-12 12:46:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 562. [2022-07-12 12:46:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 433 states have (on average 1.3579676674364896) internal successors, (588), 437 states have internal predecessors, (588), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-07-12 12:46:35,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 777 transitions. [2022-07-12 12:46:35,840 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 777 transitions. Word has length 78 [2022-07-12 12:46:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:46:35,841 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 777 transitions. [2022-07-12 12:46:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 12:46:35,841 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 777 transitions. [2022-07-12 12:46:35,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-12 12:46:35,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:46:35,845 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 12:46:35,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 12:46:35,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:46:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:46:35,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1595880674, now seen corresponding path program 1 times [2022-07-12 12:46:35,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:46:35,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805040843] [2022-07-12 12:46:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:46:35,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:46:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:36,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:46:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:36,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:46:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:36,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-12 12:46:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:36,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:46:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 12:46:36,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:46:36,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805040843] [2022-07-12 12:46:36,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805040843] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:46:36,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:46:36,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 12:46:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387794772] [2022-07-12 12:46:36,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:46:36,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 12:46:36,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:46:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 12:46:36,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 12:46:36,088 INFO L87 Difference]: Start difference. First operand 562 states and 777 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 12:46:39,292 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:39,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:46:39,817 INFO L93 Difference]: Finished difference Result 1344 states and 1870 transitions. [2022-07-12 12:46:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 12:46:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 81 [2022-07-12 12:46:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:46:39,821 INFO L225 Difference]: With dead ends: 1344 [2022-07-12 12:46:39,822 INFO L226 Difference]: Without dead ends: 798 [2022-07-12 12:46:39,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-12 12:46:39,824 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 944 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 424 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-12 12:46:39,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [979 Valid, 1233 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 847 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2022-07-12 12:46:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2022-07-12 12:46:39,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 703. [2022-07-12 12:46:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 537 states have (on average 1.3463687150837989) internal successors, (723), 542 states have internal predecessors, (723), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-07-12 12:46:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 958 transitions. [2022-07-12 12:46:39,850 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 958 transitions. Word has length 81 [2022-07-12 12:46:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:46:39,851 INFO L495 AbstractCegarLoop]: Abstraction has 703 states and 958 transitions. [2022-07-12 12:46:39,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-12 12:46:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 958 transitions. [2022-07-12 12:46:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 12:46:39,852 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:46:39,852 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 12:46:39,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 12:46:39,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:46:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:46:39,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1746632066, now seen corresponding path program 1 times [2022-07-12 12:46:39,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:46:39,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917299123] [2022-07-12 12:46:39,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:46:39,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:46:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:46:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:40,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:46:40,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:40,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 12:46:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 12:46:40,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:46:40,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917299123] [2022-07-12 12:46:40,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917299123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:46:40,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:46:40,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 12:46:40,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025117520] [2022-07-12 12:46:40,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:46:40,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 12:46:40,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:46:40,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 12:46:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 12:46:40,036 INFO L87 Difference]: Start difference. First operand 703 states and 958 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 12:46:44,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:46,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:48,395 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:50,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:46:50,592 INFO L93 Difference]: Finished difference Result 1869 states and 2665 transitions. [2022-07-12 12:46:50,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 12:46:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2022-07-12 12:46:50,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:46:50,598 INFO L225 Difference]: With dead ends: 1869 [2022-07-12 12:46:50,598 INFO L226 Difference]: Without dead ends: 1182 [2022-07-12 12:46:50,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-12 12:46:50,603 INFO L413 NwaCegarLoop]: 875 mSDtfsCounter, 620 mSDsluCounter, 1100 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 258 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 1975 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-07-12 12:46:50,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [680 Valid, 1975 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1190 Invalid, 4 Unknown, 0 Unchecked, 10.5s Time] [2022-07-12 12:46:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-07-12 12:46:50,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 757. [2022-07-12 12:46:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 591 states have (on average 1.365482233502538) internal successors, (807), 596 states have internal predecessors, (807), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-07-12 12:46:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1042 transitions. [2022-07-12 12:46:50,633 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1042 transitions. Word has length 83 [2022-07-12 12:46:50,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:46:50,634 INFO L495 AbstractCegarLoop]: Abstraction has 757 states and 1042 transitions. [2022-07-12 12:46:50,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 12:46:50,634 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1042 transitions. [2022-07-12 12:46:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-12 12:46:50,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:46:50,637 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-12 12:46:50,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 12:46:50,637 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:46:50,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:46:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash -247512640, now seen corresponding path program 1 times [2022-07-12 12:46:50,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:46:50,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686308968] [2022-07-12 12:46:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:46:50,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:46:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:50,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:46:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:50,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:46:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:50,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 12:46:50,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 12:46:50,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:46:50,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686308968] [2022-07-12 12:46:50,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686308968] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 12:46:50,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942312681] [2022-07-12 12:46:50,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:46:50,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 12:46:50,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 12:46:50,823 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) [2022-07-12 12:46:50,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 12:46:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:46:51,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 2884 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 12:46:51,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 12:46:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 12:46:51,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 12:46:51,511 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-12 12:46:51,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942312681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 12:46:51,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 12:46:51,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-12 12:46:51,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324906392] [2022-07-12 12:46:51,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 12:46:51,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 12:46:51,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:46:51,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 12:46:51,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-12 12:46:51,513 INFO L87 Difference]: Start difference. First operand 757 states and 1042 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 12:46:56,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:46:58,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:00,300 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:01,401 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:01,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:47:01,878 INFO L93 Difference]: Finished difference Result 3177 states and 4755 transitions. [2022-07-12 12:47:01,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 12:47:01,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2022-07-12 12:47:01,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:47:01,887 INFO L225 Difference]: With dead ends: 3177 [2022-07-12 12:47:01,887 INFO L226 Difference]: Without dead ends: 2436 [2022-07-12 12:47:01,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-07-12 12:47:01,891 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 2119 mSDsluCounter, 1564 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 836 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2334 SdHoareTripleChecker+Valid, 2312 SdHoareTripleChecker+Invalid, 2860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-07-12 12:47:01,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2334 Valid, 2312 Invalid, 2860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 2021 Invalid, 3 Unknown, 0 Unchecked, 10.2s Time] [2022-07-12 12:47:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2022-07-12 12:47:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 817. [2022-07-12 12:47:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 651 states have (on average 1.368663594470046) internal successors, (891), 656 states have internal predecessors, (891), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2022-07-12 12:47:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1126 transitions. [2022-07-12 12:47:01,955 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1126 transitions. Word has length 83 [2022-07-12 12:47:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:47:01,956 INFO L495 AbstractCegarLoop]: Abstraction has 817 states and 1126 transitions. [2022-07-12 12:47:01,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 12:47:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1126 transitions. [2022-07-12 12:47:01,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-12 12:47:01,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:47:01,961 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-12 12:47:01,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 12:47:02,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 12:47:02,182 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:47:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:47:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash -2050556224, now seen corresponding path program 1 times [2022-07-12 12:47:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:47:02,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696216392] [2022-07-12 12:47:02,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:47:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:02,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:47:02,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:02,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:47:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:02,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 12:47:02,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:02,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-12 12:47:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:02,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:02,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-12 12:47:02,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:47:02,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696216392] [2022-07-12 12:47:02,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696216392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:47:02,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:47:02,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-12 12:47:02,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389070057] [2022-07-12 12:47:02,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:47:02,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 12:47:02,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:47:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 12:47:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-12 12:47:02,410 INFO L87 Difference]: Start difference. First operand 817 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 12:47:05,308 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:07,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:08,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:47:08,552 INFO L93 Difference]: Finished difference Result 1685 states and 2342 transitions. [2022-07-12 12:47:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 12:47:08,553 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 96 [2022-07-12 12:47:08,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:47:08,557 INFO L225 Difference]: With dead ends: 1685 [2022-07-12 12:47:08,557 INFO L226 Difference]: Without dead ends: 884 [2022-07-12 12:47:08,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-07-12 12:47:08,560 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 772 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 442 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 1852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-07-12 12:47:08,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [808 Valid, 2058 Invalid, 1852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1408 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-07-12 12:47:08,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-12 12:47:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 798. [2022-07-12 12:47:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 638 states have (on average 1.365203761755486) internal successors, (871), 643 states have internal predecessors, (871), 112 states have call successors, (112), 48 states have call predecessors, (112), 47 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-07-12 12:47:08,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1094 transitions. [2022-07-12 12:47:08,589 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1094 transitions. Word has length 96 [2022-07-12 12:47:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:47:08,589 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1094 transitions. [2022-07-12 12:47:08,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-12 12:47:08,590 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1094 transitions. [2022-07-12 12:47:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-12 12:47:08,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:47:08,591 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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] [2022-07-12 12:47:08,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 12:47:08,591 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:47:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:47:08,592 INFO L85 PathProgramCache]: Analyzing trace with hash 2089394007, now seen corresponding path program 2 times [2022-07-12 12:47:08,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:47:08,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795780048] [2022-07-12 12:47:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:08,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:47:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:08,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:47:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:08,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:47:08,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:08,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 12:47:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-12 12:47:08,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:47:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795780048] [2022-07-12 12:47:08,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795780048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:47:08,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:47:08,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 12:47:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386409011] [2022-07-12 12:47:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:47:08,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 12:47:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:47:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 12:47:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 12:47:08,780 INFO L87 Difference]: Start difference. First operand 798 states and 1094 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 12:47:11,816 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:13,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:14,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:47:14,352 INFO L93 Difference]: Finished difference Result 1092 states and 1550 transitions. [2022-07-12 12:47:14,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 12:47:14,353 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 98 [2022-07-12 12:47:14,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:47:14,368 INFO L225 Difference]: With dead ends: 1092 [2022-07-12 12:47:14,371 INFO L226 Difference]: Without dead ends: 1089 [2022-07-12 12:47:14,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 12:47:14,375 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 1021 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 325 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-12 12:47:14,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1054 Valid, 1081 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 624 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2022-07-12 12:47:14,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-12 12:47:14,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 802. [2022-07-12 12:47:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 641 states have (on average 1.3634945397815912) internal successors, (874), 646 states have internal predecessors, (874), 112 states have call successors, (112), 49 states have call predecessors, (112), 48 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2022-07-12 12:47:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1097 transitions. [2022-07-12 12:47:14,402 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1097 transitions. Word has length 98 [2022-07-12 12:47:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:47:14,402 INFO L495 AbstractCegarLoop]: Abstraction has 802 states and 1097 transitions. [2022-07-12 12:47:14,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-12 12:47:14,402 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1097 transitions. [2022-07-12 12:47:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-12 12:47:14,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:47:14,404 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 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] [2022-07-12 12:47:14,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 12:47:14,404 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:47:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:47:14,405 INFO L85 PathProgramCache]: Analyzing trace with hash -853712003, now seen corresponding path program 1 times [2022-07-12 12:47:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:47:14,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992943845] [2022-07-12 12:47:14,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:47:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:47:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:47:14,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-12 12:47:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-12 12:47:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-12 12:47:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-12 12:47:14,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-07-12 12:47:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-12 12:47:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:14,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 12:47:14,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:47:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992943845] [2022-07-12 12:47:14,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992943845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 12:47:14,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32494144] [2022-07-12 12:47:14,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:14,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 12:47:14,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 12:47:14,673 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) [2022-07-12 12:47:14,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 12:47:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 3801 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 12:47:15,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 12:47:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 12:47:15,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 12:47:15,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32494144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:47:15,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 12:47:15,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2022-07-12 12:47:15,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247243890] [2022-07-12 12:47:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:47:15,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 12:47:15,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:47:15,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 12:47:15,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-12 12:47:15,468 INFO L87 Difference]: Start difference. First operand 802 states and 1097 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 12:47:15,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:47:15,637 INFO L93 Difference]: Finished difference Result 2141 states and 2940 transitions. [2022-07-12 12:47:15,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 12:47:15,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2022-07-12 12:47:15,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:47:15,641 INFO L225 Difference]: With dead ends: 2141 [2022-07-12 12:47:15,641 INFO L226 Difference]: Without dead ends: 1355 [2022-07-12 12:47:15,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-12 12:47:15,644 INFO L413 NwaCegarLoop]: 1178 mSDtfsCounter, 510 mSDsluCounter, 3009 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 4187 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 12:47:15,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 4187 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 12:47:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-07-12 12:47:15,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 806. [2022-07-12 12:47:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 644 states have (on average 1.3618012422360248) internal successors, (877), 649 states have internal predecessors, (877), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2022-07-12 12:47:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1101 transitions. [2022-07-12 12:47:15,679 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1101 transitions. Word has length 116 [2022-07-12 12:47:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:47:15,679 INFO L495 AbstractCegarLoop]: Abstraction has 806 states and 1101 transitions. [2022-07-12 12:47:15,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-12 12:47:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1101 transitions. [2022-07-12 12:47:15,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-07-12 12:47:15,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:47:15,681 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 12:47:15,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 12:47:15,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 12:47:15,888 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:47:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:47:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2124736263, now seen corresponding path program 1 times [2022-07-12 12:47:15,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:47:15,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438771470] [2022-07-12 12:47:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:15,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:47:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:47:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:47:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 12:47:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 12:47:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-12 12:47:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-12 12:47:16,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-12 12:47:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-12 12:47:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:16,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-12 12:47:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-07-12 12:47:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-12 12:47:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-12 12:47:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-12 12:47:16,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-12 12:47:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-12 12:47:16,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:47:16,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438771470] [2022-07-12 12:47:16,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438771470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:47:16,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:47:16,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-12 12:47:16,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443208649] [2022-07-12 12:47:16,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:47:16,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-12 12:47:16,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:47:16,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-12 12:47:16,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-12 12:47:16,250 INFO L87 Difference]: Start difference. First operand 806 states and 1101 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-12 12:47:19,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:47:20,275 INFO L93 Difference]: Finished difference Result 1919 states and 2684 transitions. [2022-07-12 12:47:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-12 12:47:20,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 197 [2022-07-12 12:47:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:47:20,280 INFO L225 Difference]: With dead ends: 1919 [2022-07-12 12:47:20,280 INFO L226 Difference]: Without dead ends: 1129 [2022-07-12 12:47:20,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-07-12 12:47:20,282 INFO L413 NwaCegarLoop]: 590 mSDtfsCounter, 1070 mSDsluCounter, 885 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 551 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 1812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-12 12:47:20,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1112 Valid, 1475 Invalid, 1812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 1260 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2022-07-12 12:47:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2022-07-12 12:47:20,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 807. [2022-07-12 12:47:20,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 645 states have (on average 1.3612403100775194) internal successors, (878), 650 states have internal predecessors, (878), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2022-07-12 12:47:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1102 transitions. [2022-07-12 12:47:20,312 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1102 transitions. Word has length 197 [2022-07-12 12:47:20,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:47:20,312 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1102 transitions. [2022-07-12 12:47:20,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-12 12:47:20,313 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1102 transitions. [2022-07-12 12:47:20,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-12 12:47:20,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:47:20,315 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 12:47:20,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 12:47:20,315 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:47:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:47:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1201117839, now seen corresponding path program 1 times [2022-07-12 12:47:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:47:20,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876227199] [2022-07-12 12:47:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:47:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:47:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:47:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 12:47:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-12 12:47:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-12 12:47:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-07-12 12:47:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-12 12:47:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-12 12:47:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-12 12:47:20,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2022-07-12 12:47:20,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-12 12:47:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-07-12 12:47:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-07-12 12:47:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-07-12 12:47:20,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-12 12:47:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-12 12:47:20,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:47:20,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876227199] [2022-07-12 12:47:20,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876227199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 12:47:20,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480087157] [2022-07-12 12:47:20,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:20,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 12:47:20,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 12:47:20,650 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) [2022-07-12 12:47:20,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 12:47:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:21,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 4803 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 12:47:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 12:47:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-12 12:47:21,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 12:47:21,885 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 12:47:21,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480087157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 12:47:21,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 12:47:21,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-07-12 12:47:21,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634364746] [2022-07-12 12:47:21,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 12:47:21,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 12:47:21,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:47:21,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 12:47:21,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-07-12 12:47:21,887 INFO L87 Difference]: Start difference. First operand 807 states and 1102 transitions. Second operand has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-07-12 12:47:28,096 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:32,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:47:33,440 INFO L93 Difference]: Finished difference Result 5881 states and 8943 transitions. [2022-07-12 12:47:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-12 12:47:33,441 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 207 [2022-07-12 12:47:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:47:33,462 INFO L225 Difference]: With dead ends: 5881 [2022-07-12 12:47:33,463 INFO L226 Difference]: Without dead ends: 5090 [2022-07-12 12:47:33,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=932, Invalid=3100, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 12:47:33,467 INFO L413 NwaCegarLoop]: 754 mSDtfsCounter, 7508 mSDsluCounter, 3319 mSDsCounter, 0 mSdLazyCounter, 7198 mSolverCounterSat, 3532 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7879 SdHoareTripleChecker+Valid, 4073 SdHoareTripleChecker+Invalid, 10732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3532 IncrementalHoareTripleChecker+Valid, 7198 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-07-12 12:47:33,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7879 Valid, 4073 Invalid, 10732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3532 Valid, 7198 Invalid, 2 Unknown, 0 Unchecked, 10.6s Time] [2022-07-12 12:47:33,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2022-07-12 12:47:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 934. [2022-07-12 12:47:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 771 states have (on average 1.364461738002594) internal successors, (1052), 776 states have internal predecessors, (1052), 113 states have call successors, (113), 49 states have call predecessors, (113), 49 states have return successors, (113), 113 states have call predecessors, (113), 112 states have call successors, (113) [2022-07-12 12:47:33,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1278 transitions. [2022-07-12 12:47:33,585 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1278 transitions. Word has length 207 [2022-07-12 12:47:33,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:47:33,585 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1278 transitions. [2022-07-12 12:47:33,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2022-07-12 12:47:33,586 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1278 transitions. [2022-07-12 12:47:33,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-07-12 12:47:33,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:47:33,588 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 12:47:33,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 12:47:33,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 12:47:33,804 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:47:33,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:47:33,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1247223031, now seen corresponding path program 2 times [2022-07-12 12:47:33,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:47:33,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680762322] [2022-07-12 12:47:33,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:33,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:47:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:47:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:47:34,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 12:47:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2022-07-12 12:47:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:34,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-12 12:47:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-07-12 12:47:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-07-12 12:47:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-07-12 12:47:34,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-07-12 12:47:34,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-07-12 12:47:34,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2022-07-12 12:47:34,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-07-12 12:47:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-07-12 12:47:34,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2022-07-12 12:47:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-07-12 12:47:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2022-07-12 12:47:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:34,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 12:47:34,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:47:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680762322] [2022-07-12 12:47:34,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680762322] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 12:47:34,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752697082] [2022-07-12 12:47:34,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 12:47:34,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 12:47:34,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 12:47:34,331 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) [2022-07-12 12:47:34,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 12:47:35,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 12:47:35,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 12:47:35,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 5030 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 12:47:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 12:47:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 4 proven. 235 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-12 12:47:35,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 12:47:35,611 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-12 12:47:35,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752697082] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 12:47:35,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 12:47:35,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 23 [2022-07-12 12:47:35,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423100235] [2022-07-12 12:47:35,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 12:47:35,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-12 12:47:35,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:47:35,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-12 12:47:35,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2022-07-12 12:47:35,614 INFO L87 Difference]: Start difference. First operand 934 states and 1278 transitions. Second operand has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-07-12 12:47:44,152 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:46,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:49,977 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:52,009 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-12 12:47:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:47:54,653 INFO L93 Difference]: Finished difference Result 8510 states and 13008 transitions. [2022-07-12 12:47:54,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-12 12:47:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 247 [2022-07-12 12:47:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:47:54,732 INFO L225 Difference]: With dead ends: 8510 [2022-07-12 12:47:54,733 INFO L226 Difference]: Without dead ends: 7592 [2022-07-12 12:47:54,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=980, Invalid=2442, Unknown=0, NotChecked=0, Total=3422 [2022-07-12 12:47:54,739 INFO L413 NwaCegarLoop]: 907 mSDtfsCounter, 11120 mSDsluCounter, 4514 mSDsCounter, 0 mSdLazyCounter, 8015 mSolverCounterSat, 4797 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11690 SdHoareTripleChecker+Valid, 5421 SdHoareTripleChecker+Invalid, 12816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4797 IncrementalHoareTripleChecker+Valid, 8015 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2022-07-12 12:47:54,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11690 Valid, 5421 Invalid, 12816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4797 Valid, 8015 Invalid, 4 Unknown, 0 Unchecked, 17.7s Time] [2022-07-12 12:47:54,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2022-07-12 12:47:54,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 1054. [2022-07-12 12:47:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 891 states have (on average 1.3692480359147026) internal successors, (1220), 896 states have internal predecessors, (1220), 113 states have call successors, (113), 49 states have call predecessors, (113), 49 states have return successors, (113), 113 states have call predecessors, (113), 112 states have call successors, (113) [2022-07-12 12:47:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1446 transitions. [2022-07-12 12:47:54,869 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1446 transitions. Word has length 247 [2022-07-12 12:47:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:47:54,869 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 1446 transitions. [2022-07-12 12:47:54,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2022-07-12 12:47:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1446 transitions. [2022-07-12 12:47:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-07-12 12:47:54,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 12:47:54,874 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 12:47:54,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 12:47:55,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 12:47:55,100 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 12:47:55,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 12:47:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 956437033, now seen corresponding path program 3 times [2022-07-12 12:47:55,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 12:47:55,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958132675] [2022-07-12 12:47:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 12:47:55,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 12:47:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-12 12:47:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-12 12:47:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-12 12:47:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-12 12:47:55,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2022-07-12 12:47:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-07-12 12:47:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-07-12 12:47:55,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-07-12 12:47:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-07-12 12:47:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2022-07-12 12:47:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2022-07-12 12:47:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-07-12 12:47:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-07-12 12:47:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2022-07-12 12:47:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2022-07-12 12:47:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2022-07-12 12:47:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-12 12:47:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 12:47:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2022-07-12 12:47:55,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 12:47:55,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958132675] [2022-07-12 12:47:55,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958132675] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 12:47:55,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 12:47:55,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-12 12:47:55,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145481225] [2022-07-12 12:47:55,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 12:47:55,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 12:47:55,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 12:47:55,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 12:47:55,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-12 12:47:55,661 INFO L87 Difference]: Start difference. First operand 1054 states and 1446 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-12 12:47:56,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 12:47:56,138 INFO L93 Difference]: Finished difference Result 2036 states and 2856 transitions. [2022-07-12 12:47:56,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-12 12:47:56,138 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 277 [2022-07-12 12:47:56,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 12:47:56,139 INFO L225 Difference]: With dead ends: 2036 [2022-07-12 12:47:56,139 INFO L226 Difference]: Without dead ends: 0 [2022-07-12 12:47:56,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-07-12 12:47:56,160 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 272 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 12:47:56,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 728 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 12:47:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-12 12:47:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-12 12:47:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 12:47:56,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-12 12:47:56,177 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 277 [2022-07-12 12:47:56,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 12:47:56,177 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-12 12:47:56,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-12 12:47:56,177 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-12 12:47:56,177 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-12 12:47:56,180 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-12 12:47:56,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 12:47:56,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-12 12:48:28,776 WARN L233 SmtUtils]: Spent 32.45s on a formula simplification. DAG size of input: 125 DAG size of output: 123 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-07-12 12:49:44,823 WARN L233 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-07-12 12:49:55,484 WARN L233 SmtUtils]: Spent 10.64s on a formula simplification. DAG size of input: 690 DAG size of output: 686 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)