./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--usb--misc--usbtest.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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--usb--misc--usbtest.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 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 00:13:55,589 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 00:13:55,591 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 00:13:55,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 00:13:55,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 00:13:55,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 00:13:55,630 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 00:13:55,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 00:13:55,633 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 00:13:55,637 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 00:13:55,638 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 00:13:55,639 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 00:13:55,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 00:13:55,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 00:13:55,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 00:13:55,644 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 00:13:55,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 00:13:55,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 00:13:55,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 00:13:55,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 00:13:55,652 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 00:13:55,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 00:13:55,653 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 00:13:55,654 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 00:13:55,655 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 00:13:55,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 00:13:55,660 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 00:13:55,660 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 00:13:55,661 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 00:13:55,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 00:13:55,662 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 00:13:55,663 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 00:13:55,664 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 00:13:55,664 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 00:13:55,665 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 00:13:55,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 00:13:55,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 00:13:55,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 00:13:55,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 00:13:55,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 00:13:55,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 00:13:55,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 00:13:55,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-23 00:13:55,694 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 00:13:55,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 00:13:55,694 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 00:13:55,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 00:13:55,695 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 00:13:55,695 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 00:13:55,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 00:13:55,696 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 00:13:55,696 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 00:13:55,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 00:13:55,697 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 00:13:55,697 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 00:13:55,697 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-23 00:13:55,697 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 00:13:55,698 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-23 00:13:55,698 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-23 00:13:55,698 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 00:13:55,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-23 00:13:55,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 00:13:55,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 00:13:55,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 00:13:55,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 00:13:55,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 00:13:55,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 00:13:55,699 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-23 00:13:55,699 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 00:13:55,704 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 00:13:55,704 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-23 00:13:55,704 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-23 00:13:55,704 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-23 00:13:55,705 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 045b49e5089f039c3b28eef4cf3a9c907cbda8f22472af0061e42bad883dd2f9 [2022-07-23 00:13:55,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 00:13:55,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 00:13:55,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 00:13:55,938 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 00:13:55,943 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 00:13:55,945 INFO L432 ainManager$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--usb--misc--usbtest.ko-entry_point.cil.out.i [2022-07-23 00:13:56,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23cb4503/1a4b3bc2e34942fdbe587d727e954bcf/FLAG1f3b471f8 [2022-07-23 00:13:56,677 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 00:13:56,677 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--usb--misc--usbtest.ko-entry_point.cil.out.i [2022-07-23 00:13:56,709 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23cb4503/1a4b3bc2e34942fdbe587d727e954bcf/FLAG1f3b471f8 [2022-07-23 00:13:57,002 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d23cb4503/1a4b3bc2e34942fdbe587d727e954bcf [2022-07-23 00:13:57,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 00:13:57,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 00:13:57,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 00:13:57,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 00:13:57,017 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 00:13:57,017 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 12:13:57" (1/1) ... [2022-07-23 00:13:57,018 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439db41e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:57, skipping insertion in model container [2022-07-23 00:13:57,018 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 12:13:57" (1/1) ... [2022-07-23 00:13:57,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 00:13:57,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 00:13:57,559 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2022-07-23 00:13:57,575 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2022-07-23 00:13:57,715 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--usb--misc--usbtest.ko-entry_point.cil.out.i[105797,105810] [2022-07-23 00:13:58,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 00:13:58,207 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 00:13:58,262 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [3528] [2022-07-23 00:13:58,263 WARN L1251 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [3529-3530] [2022-07-23 00:13:58,274 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--usb--misc--usbtest.ko-entry_point.cil.out.i[105797,105810] [2022-07-23 00:13:58,476 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 00:13:58,523 INFO L208 MainTranslator]: Completed translation [2022-07-23 00:13:58,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58 WrapperNode [2022-07-23 00:13:58,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 00:13:58,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 00:13:58,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 00:13:58,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 00:13:58,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,765 INFO L137 Inliner]: procedures = 189, calls = 1686, calls flagged for inlining = 77, calls inlined = 68, statements flattened = 4532 [2022-07-23 00:13:58,765 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 00:13:58,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 00:13:58,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 00:13:58,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 00:13:58,774 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,878 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 00:13:58,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 00:13:58,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 00:13:58,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 00:13:58,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (1/1) ... [2022-07-23 00:13:58,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 00:13:58,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:13:58,986 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) [2022-07-23 00:13:58,999 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 [2022-07-23 00:13:59,021 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2022-07-23 00:13:59,022 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2022-07-23 00:13:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2022-07-23 00:13:59,022 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2022-07-23 00:13:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2022-07-23 00:13:59,022 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2022-07-23 00:13:59,022 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2022-07-23 00:13:59,022 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2022-07-23 00:13:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure free_sglist [2022-07-23 00:13:59,023 INFO L138 BoogieDeclarations]: Found implementation of procedure free_sglist [2022-07-23 00:13:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc_array [2022-07-23 00:13:59,023 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc_array [2022-07-23 00:13:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure test_iso_queue [2022-07-23 00:13:59,023 INFO L138 BoogieDeclarations]: Found implementation of procedure test_iso_queue [2022-07-23 00:13:59,023 INFO L130 BoogieDeclarations]: Found specification of procedure simple_check_buf [2022-07-23 00:13:59,023 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_check_buf [2022-07-23 00:13:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-07-23 00:13:59,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-07-23 00:13:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 00:13:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_interface [2022-07-23 00:13:59,024 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_interface [2022-07-23 00:13:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure perform_sglist [2022-07-23 00:13:59,024 INFO L138 BoogieDeclarations]: Found implementation of procedure perform_sglist [2022-07-23 00:13:59,024 INFO L130 BoogieDeclarations]: Found specification of procedure test_unaligned_bulk [2022-07-23 00:13:59,025 INFO L138 BoogieDeclarations]: Found implementation of procedure test_unaligned_bulk [2022-07-23 00:13:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-07-23 00:13:59,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-07-23 00:13:59,025 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_sglist [2022-07-23 00:13:59,025 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_sglist [2022-07-23 00:13:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-07-23 00:13:59,026 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-07-23 00:13:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-23 00:13:59,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-23 00:13:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2022-07-23 00:13:59,026 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2022-07-23 00:13:59,026 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2022-07-23 00:13:59,027 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2022-07-23 00:13:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-07-23 00:13:59,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-07-23 00:13:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-07-23 00:13:59,027 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-07-23 00:13:59,027 INFO L130 BoogieDeclarations]: Found specification of procedure set_altsetting [2022-07-23 00:13:59,028 INFO L138 BoogieDeclarations]: Found implementation of procedure set_altsetting [2022-07-23 00:13:59,028 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2022-07-23 00:13:59,028 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2022-07-23 00:13:59,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 00:13:59,028 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-23 00:13:59,028 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-23 00:13:59,028 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2022-07-23 00:13:59,029 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2022-07-23 00:13:59,029 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-23 00:13:59,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-23 00:13:59,029 INFO L130 BoogieDeclarations]: Found specification of procedure verify_not_halted [2022-07-23 00:13:59,030 INFO L138 BoogieDeclarations]: Found implementation of procedure verify_not_halted [2022-07-23 00:13:59,030 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2022-07-23 00:13:59,030 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2022-07-23 00:13:59,030 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2022-07-23 00:13:59,031 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2022-07-23 00:13:59,031 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-23 00:13:59,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-23 00:13:59,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-07-23 00:13:59,031 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-07-23 00:13:59,031 INFO L130 BoogieDeclarations]: Found specification of procedure kcalloc [2022-07-23 00:13:59,031 INFO L138 BoogieDeclarations]: Found implementation of procedure kcalloc [2022-07-23 00:13:59,032 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-23 00:13:59,032 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-23 00:13:59,032 INFO L130 BoogieDeclarations]: Found specification of procedure test_halt [2022-07-23 00:13:59,032 INFO L138 BoogieDeclarations]: Found implementation of procedure test_halt [2022-07-23 00:13:59,032 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_alloc_urb [2022-07-23 00:13:59,033 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_alloc_urb [2022-07-23 00:13:59,033 INFO L130 BoogieDeclarations]: Found specification of procedure unlink1 [2022-07-23 00:13:59,033 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink1 [2022-07-23 00:13:59,033 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 00:13:59,033 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_out [2022-07-23 00:13:59,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_out [2022-07-23 00:13:59,033 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-23 00:13:59,033 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-23 00:13:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2022-07-23 00:13:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2022-07-23 00:13:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_status [2022-07-23 00:13:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_status [2022-07-23 00:13:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 00:13:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure is_good_config [2022-07-23 00:13:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure is_good_config [2022-07-23 00:13:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2022-07-23 00:13:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2022-07-23 00:13:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2022-07-23 00:13:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2022-07-23 00:13:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 00:13:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 00:13:59,036 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unlink_urb [2022-07-23 00:13:59,036 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unlink_urb [2022-07-23 00:13:59,036 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2022-07-23 00:13:59,036 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2022-07-23 00:13:59,036 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-07-23 00:13:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-07-23 00:13:59,037 INFO L130 BoogieDeclarations]: Found specification of procedure testdev_to_usbdev [2022-07-23 00:13:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure testdev_to_usbdev [2022-07-23 00:13:59,037 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-07-23 00:13:59,037 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-07-23 00:13:59,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 00:13:59,038 INFO L130 BoogieDeclarations]: Found specification of procedure unlink_simple [2022-07-23 00:13:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure unlink_simple [2022-07-23 00:13:59,038 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2022-07-23 00:13:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2022-07-23 00:13:59,038 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec_and_test [2022-07-23 00:13:59,038 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec_and_test [2022-07-23 00:13:59,038 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-07-23 00:13:59,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-07-23 00:13:59,039 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2022-07-23 00:13:59,039 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2022-07-23 00:13:59,039 INFO L130 BoogieDeclarations]: Found specification of procedure simple_io [2022-07-23 00:13:59,039 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_io [2022-07-23 00:13:59,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 00:13:59,040 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 00:13:59,042 INFO L130 BoogieDeclarations]: Found specification of procedure simple_alloc_urb [2022-07-23 00:13:59,042 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_alloc_urb [2022-07-23 00:13:59,042 INFO L130 BoogieDeclarations]: Found specification of procedure simple_free_urb [2022-07-23 00:13:59,042 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_free_urb [2022-07-23 00:13:59,043 INFO L130 BoogieDeclarations]: Found specification of procedure simple_fill_buf [2022-07-23 00:13:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_fill_buf [2022-07-23 00:13:59,044 INFO L130 BoogieDeclarations]: Found specification of procedure do_gettimeofday [2022-07-23 00:13:59,044 INFO L138 BoogieDeclarations]: Found implementation of procedure do_gettimeofday [2022-07-23 00:13:59,044 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2022-07-23 00:13:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2022-07-23 00:13:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-23 00:13:59,048 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-23 00:13:59,048 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_ioctl [2022-07-23 00:13:59,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_ioctl [2022-07-23 00:13:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure buffer_offset [2022-07-23 00:13:59,049 INFO L138 BoogieDeclarations]: Found implementation of procedure buffer_offset [2022-07-23 00:13:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2022-07-23 00:13:59,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2022-07-23 00:13:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 00:13:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure usb_clear_halt [2022-07-23 00:13:59,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_clear_halt [2022-07-23 00:13:59,049 INFO L130 BoogieDeclarations]: Found specification of procedure usbtest_disconnect [2022-07-23 00:13:59,049 INFO L138 BoogieDeclarations]: Found implementation of procedure usbtest_disconnect [2022-07-23 00:13:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure check_guard_bytes [2022-07-23 00:13:59,050 INFO L138 BoogieDeclarations]: Found implementation of procedure check_guard_bytes [2022-07-23 00:13:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2022-07-23 00:13:59,050 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2022-07-23 00:13:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2022-07-23 00:13:59,050 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2022-07-23 00:13:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-07-23 00:13:59,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-07-23 00:13:59,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 00:13:59,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 00:13:59,051 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_descriptor [2022-07-23 00:13:59,051 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_descriptor [2022-07-23 00:13:59,570 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 00:13:59,572 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 00:13:59,962 INFO L764 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-07-23 00:14:01,700 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 00:14:01,711 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 00:14:01,711 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-23 00:14:01,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 12:14:01 BoogieIcfgContainer [2022-07-23 00:14:01,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 00:14:01,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 00:14:01,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 00:14:01,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 00:14:01,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 12:13:57" (1/3) ... [2022-07-23 00:14:01,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1057fc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 12:14:01, skipping insertion in model container [2022-07-23 00:14:01,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 12:13:58" (2/3) ... [2022-07-23 00:14:01,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1057fc2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 12:14:01, skipping insertion in model container [2022-07-23 00:14:01,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 12:14:01" (3/3) ... [2022-07-23 00:14:01,720 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--usb--misc--usbtest.ko-entry_point.cil.out.i [2022-07-23 00:14:01,730 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 00:14:01,731 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-23 00:14:01,780 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 00:14:01,784 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@21b358ad, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b99b248 [2022-07-23 00:14:01,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-23 00:14:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand has 1344 states, 1018 states have (on average 1.4292730844793713) internal successors, (1455), 1033 states have internal predecessors, (1455), 256 states have call successors, (256), 69 states have call predecessors, (256), 68 states have return successors, (253), 250 states have call predecessors, (253), 253 states have call successors, (253) [2022-07-23 00:14:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-23 00:14:01,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:01,799 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-23 00:14:01,799 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:01,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:01,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1366154187, now seen corresponding path program 1 times [2022-07-23 00:14:01,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:01,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393377652] [2022-07-23 00:14:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:02,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:02,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:02,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-23 00:14:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:02,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 00:14:02,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:02,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393377652] [2022-07-23 00:14:02,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393377652] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:02,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:02,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 00:14:02,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49416574] [2022-07-23 00:14:02,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:02,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 00:14:02,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 00:14:02,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:14:02,337 INFO L87 Difference]: Start difference. First operand has 1344 states, 1018 states have (on average 1.4292730844793713) internal successors, (1455), 1033 states have internal predecessors, (1455), 256 states have call successors, (256), 69 states have call predecessors, (256), 68 states have return successors, (253), 250 states have call predecessors, (253), 253 states have call successors, (253) Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 00:14:05,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:05,327 INFO L93 Difference]: Finished difference Result 3055 states and 4642 transitions. [2022-07-23 00:14:05,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 00:14:05,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2022-07-23 00:14:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:05,379 INFO L225 Difference]: With dead ends: 3055 [2022-07-23 00:14:05,380 INFO L226 Difference]: Without dead ends: 1679 [2022-07-23 00:14:05,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 00:14:05,403 INFO L413 NwaCegarLoop]: 1724 mSDtfsCounter, 1287 mSDsluCounter, 2866 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 785 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 4590 SdHoareTripleChecker+Invalid, 2882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:05,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1361 Valid, 4590 Invalid, 2882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-23 00:14:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2022-07-23 00:14:05,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1357. [2022-07-23 00:14:05,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1030 states have (on average 1.4116504854368932) internal successors, (1454), 1041 states have internal predecessors, (1454), 255 states have call successors, (255), 72 states have call predecessors, (255), 71 states have return successors, (254), 250 states have call predecessors, (254), 254 states have call successors, (254) [2022-07-23 00:14:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 1963 transitions. [2022-07-23 00:14:05,779 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 1963 transitions. Word has length 39 [2022-07-23 00:14:05,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:05,780 INFO L495 AbstractCegarLoop]: Abstraction has 1357 states and 1963 transitions. [2022-07-23 00:14:05,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 00:14:05,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 1963 transitions. [2022-07-23 00:14:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-23 00:14:05,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:05,787 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-23 00:14:05,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 00:14:05,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:05,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:05,808 INFO L85 PathProgramCache]: Analyzing trace with hash 280385052, now seen corresponding path program 1 times [2022-07-23 00:14:05,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:05,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565718109] [2022-07-23 00:14:05,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:05,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:06,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:06,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:06,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:06,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-23 00:14:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:06,147 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 00:14:06,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565718109] [2022-07-23 00:14:06,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565718109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:06,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:06,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 00:14:06,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922398251] [2022-07-23 00:14:06,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:06,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 00:14:06,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:06,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 00:14:06,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:14:06,152 INFO L87 Difference]: Start difference. First operand 1357 states and 1963 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 00:14:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:10,436 INFO L93 Difference]: Finished difference Result 3009 states and 4438 transitions. [2022-07-23 00:14:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 00:14:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2022-07-23 00:14:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:10,464 INFO L225 Difference]: With dead ends: 3009 [2022-07-23 00:14:10,464 INFO L226 Difference]: Without dead ends: 1675 [2022-07-23 00:14:10,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 00:14:10,487 INFO L413 NwaCegarLoop]: 1698 mSDtfsCounter, 1169 mSDsluCounter, 2855 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 755 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 4553 SdHoareTripleChecker+Invalid, 2823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 755 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:10,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 4553 Invalid, 2823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [755 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-23 00:14:10,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2022-07-23 00:14:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1357. [2022-07-23 00:14:10,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1030 states have (on average 1.4106796116504854) internal successors, (1453), 1041 states have internal predecessors, (1453), 255 states have call successors, (255), 72 states have call predecessors, (255), 71 states have return successors, (254), 250 states have call predecessors, (254), 254 states have call successors, (254) [2022-07-23 00:14:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 1962 transitions. [2022-07-23 00:14:10,627 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 1962 transitions. Word has length 60 [2022-07-23 00:14:10,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:10,629 INFO L495 AbstractCegarLoop]: Abstraction has 1357 states and 1962 transitions. [2022-07-23 00:14:10,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-23 00:14:10,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 1962 transitions. [2022-07-23 00:14:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-23 00:14:10,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:10,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2022-07-23 00:14:10,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 00:14:10,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:10,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1098033502, now seen corresponding path program 1 times [2022-07-23 00:14:10,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:10,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029681550] [2022-07-23 00:14:10,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:10,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:10,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:10,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:10,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:10,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:10,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:10,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-23 00:14:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 00:14:11,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:11,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029681550] [2022-07-23 00:14:11,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029681550] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:11,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:11,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 00:14:11,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161518297] [2022-07-23 00:14:11,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:11,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 00:14:11,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:11,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 00:14:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:14:11,007 INFO L87 Difference]: Start difference. First operand 1357 states and 1962 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 00:14:15,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:15,828 INFO L93 Difference]: Finished difference Result 1711 states and 2534 transitions. [2022-07-23 00:14:15,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 00:14:15,829 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 60 [2022-07-23 00:14:15,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:15,837 INFO L225 Difference]: With dead ends: 1711 [2022-07-23 00:14:15,837 INFO L226 Difference]: Without dead ends: 1708 [2022-07-23 00:14:15,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:15,844 INFO L413 NwaCegarLoop]: 1661 mSDtfsCounter, 3051 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 1184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3200 SdHoareTripleChecker+Valid, 3217 SdHoareTripleChecker+Invalid, 2622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1184 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:15,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3200 Valid, 3217 Invalid, 2622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1184 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-23 00:14:15,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1708 states. [2022-07-23 00:14:15,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1708 to 1387. [2022-07-23 00:14:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1387 states, 1049 states have (on average 1.40419447092469) internal successors, (1473), 1060 states have internal predecessors, (1473), 259 states have call successors, (259), 79 states have call predecessors, (259), 78 states have return successors, (258), 254 states have call predecessors, (258), 258 states have call successors, (258) [2022-07-23 00:14:15,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1387 states to 1387 states and 1990 transitions. [2022-07-23 00:14:15,956 INFO L78 Accepts]: Start accepts. Automaton has 1387 states and 1990 transitions. Word has length 60 [2022-07-23 00:14:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:15,957 INFO L495 AbstractCegarLoop]: Abstraction has 1387 states and 1990 transitions. [2022-07-23 00:14:15,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-23 00:14:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1387 states and 1990 transitions. [2022-07-23 00:14:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-23 00:14:15,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:15,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:15,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 00:14:15,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:15,970 INFO L85 PathProgramCache]: Analyzing trace with hash -965990945, now seen corresponding path program 1 times [2022-07-23 00:14:15,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:15,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693910805] [2022-07-23 00:14:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:15,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-07-23 00:14:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-23 00:14:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-23 00:14:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-23 00:14:16,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-23 00:14:16,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-23 00:14:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-23 00:14:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:16,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-23 00:14:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:16,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693910805] [2022-07-23 00:14:16,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-23 00:14:16,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731991194] [2022-07-23 00:14:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:16,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:16,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:16,459 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) [2022-07-23 00:14:16,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 00:14:17,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:17,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 2437 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 00:14:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 00:14:17,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:14:17,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731991194] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:17,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:17,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 00:14:17,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578667015] [2022-07-23 00:14:17,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:17,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 00:14:17,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 00:14:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:17,387 INFO L87 Difference]: Start difference. First operand 1387 states and 1990 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-23 00:14:17,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:17,493 INFO L93 Difference]: Finished difference Result 2751 states and 3957 transitions. [2022-07-23 00:14:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 00:14:17,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 160 [2022-07-23 00:14:17,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:17,501 INFO L225 Difference]: With dead ends: 2751 [2022-07-23 00:14:17,509 INFO L226 Difference]: Without dead ends: 1388 [2022-07-23 00:14:17,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:17,528 INFO L413 NwaCegarLoop]: 1921 mSDtfsCounter, 0 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3837 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:17,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3837 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 00:14:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-07-23 00:14:17,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1388. [2022-07-23 00:14:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1050 states have (on average 1.4038095238095238) internal successors, (1474), 1061 states have internal predecessors, (1474), 259 states have call successors, (259), 79 states have call predecessors, (259), 78 states have return successors, (258), 254 states have call predecessors, (258), 258 states have call successors, (258) [2022-07-23 00:14:17,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 1991 transitions. [2022-07-23 00:14:17,621 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 1991 transitions. Word has length 160 [2022-07-23 00:14:17,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:17,627 INFO L495 AbstractCegarLoop]: Abstraction has 1388 states and 1991 transitions. [2022-07-23 00:14:17,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2022-07-23 00:14:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 1991 transitions. [2022-07-23 00:14:17,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-23 00:14:17,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:17,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:17,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 00:14:17,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:17,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:17,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:17,876 INFO L85 PathProgramCache]: Analyzing trace with hash -558992368, now seen corresponding path program 1 times [2022-07-23 00:14:17,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:17,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292011442] [2022-07-23 00:14:17,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:17,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-23 00:14:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-23 00:14:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:18,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-07-23 00:14:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-23 00:14:18,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-07-23 00:14:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-07-23 00:14:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-07-23 00:14:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:18,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-23 00:14:18,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292011442] [2022-07-23 00:14:18,263 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-23 00:14:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299600697] [2022-07-23 00:14:18,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:18,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:18,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:18,265 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) [2022-07-23 00:14:18,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 00:14:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:19,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 00:14:19,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 00:14:19,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:14:19,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299600697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:19,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:19,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 00:14:19,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522597680] [2022-07-23 00:14:19,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:19,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 00:14:19,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:19,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 00:14:19,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:19,249 INFO L87 Difference]: Start difference. First operand 1388 states and 1991 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-23 00:14:19,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:19,415 INFO L93 Difference]: Finished difference Result 2843 states and 4064 transitions. [2022-07-23 00:14:19,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 00:14:19,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 159 [2022-07-23 00:14:19,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:19,429 INFO L225 Difference]: With dead ends: 2843 [2022-07-23 00:14:19,443 INFO L226 Difference]: Without dead ends: 1479 [2022-07-23 00:14:19,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:19,452 INFO L413 NwaCegarLoop]: 1926 mSDtfsCounter, 281 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 3624 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:19,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 3624 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 00:14:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2022-07-23 00:14:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1470. [2022-07-23 00:14:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1114 states have (on average 1.3940754039497307) internal successors, (1553), 1125 states have internal predecessors, (1553), 265 states have call successors, (265), 91 states have call predecessors, (265), 90 states have return successors, (264), 260 states have call predecessors, (264), 264 states have call successors, (264) [2022-07-23 00:14:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 2082 transitions. [2022-07-23 00:14:19,552 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 2082 transitions. Word has length 159 [2022-07-23 00:14:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:19,552 INFO L495 AbstractCegarLoop]: Abstraction has 1470 states and 2082 transitions. [2022-07-23 00:14:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-23 00:14:19,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 2082 transitions. [2022-07-23 00:14:19,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-23 00:14:19,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:19,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-23 00:14:19,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 00:14:19,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:19,784 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:19,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:19,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1257341609, now seen corresponding path program 1 times [2022-07-23 00:14:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:19,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121072063] [2022-07-23 00:14:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:19,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:19,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:20,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-23 00:14:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-23 00:14:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-07-23 00:14:20,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:20,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-07-23 00:14:20,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-23 00:14:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:20,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-07-23 00:14:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2022-07-23 00:14:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-23 00:14:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:20,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-07-23 00:14:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:20,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121072063] [2022-07-23 00:14:20,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-23 00:14:20,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962870192] [2022-07-23 00:14:20,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:20,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:20,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:20,220 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) [2022-07-23 00:14:20,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 00:14:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:21,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 2534 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 00:14:21,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 00:14:21,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:14:21,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962870192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:21,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:21,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 00:14:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173129401] [2022-07-23 00:14:21,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:21,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 00:14:21,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:21,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 00:14:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:21,193 INFO L87 Difference]: Start difference. First operand 1470 states and 2082 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-23 00:14:21,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:21,371 INFO L93 Difference]: Finished difference Result 3144 states and 4446 transitions. [2022-07-23 00:14:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 00:14:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 175 [2022-07-23 00:14:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:21,380 INFO L225 Difference]: With dead ends: 3144 [2022-07-23 00:14:21,380 INFO L226 Difference]: Without dead ends: 1698 [2022-07-23 00:14:21,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-23 00:14:21,400 INFO L413 NwaCegarLoop]: 2203 mSDtfsCounter, 341 mSDsluCounter, 4053 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 6256 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:21,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 6256 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 00:14:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2022-07-23 00:14:21,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1472. [2022-07-23 00:14:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1116 states have (on average 1.3933691756272402) internal successors, (1555), 1127 states have internal predecessors, (1555), 265 states have call successors, (265), 91 states have call predecessors, (265), 90 states have return successors, (264), 260 states have call predecessors, (264), 264 states have call successors, (264) [2022-07-23 00:14:21,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2084 transitions. [2022-07-23 00:14:21,499 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2084 transitions. Word has length 175 [2022-07-23 00:14:21,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:21,504 INFO L495 AbstractCegarLoop]: Abstraction has 1472 states and 2084 transitions. [2022-07-23 00:14:21,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 2 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2022-07-23 00:14:21,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2084 transitions. [2022-07-23 00:14:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-23 00:14:21,518 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:21,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:21,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-23 00:14:21,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:21,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:21,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:21,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1566318098, now seen corresponding path program 1 times [2022-07-23 00:14:21,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:21,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627294572] [2022-07-23 00:14:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:21,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:21,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:21,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:21,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:21,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:21,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-23 00:14:21,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-23 00:14:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:22,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-23 00:14:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-23 00:14:22,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-07-23 00:14:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-07-23 00:14:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-23 00:14:22,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-07-23 00:14:22,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2022-07-23 00:14:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:22,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-23 00:14:22,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:22,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627294572] [2022-07-23 00:14:22,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-23 00:14:22,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76125135] [2022-07-23 00:14:22,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:22,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:22,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:22,127 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) [2022-07-23 00:14:22,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 00:14:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:23,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 2567 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 00:14:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 00:14:23,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:14:23,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76125135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:23,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:23,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 00:14:23,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602468666] [2022-07-23 00:14:23,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:23,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 00:14:23,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:23,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 00:14:23,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-23 00:14:23,089 INFO L87 Difference]: Start difference. First operand 1472 states and 2084 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-23 00:14:23,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:23,674 INFO L93 Difference]: Finished difference Result 4130 states and 5873 transitions. [2022-07-23 00:14:23,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 00:14:23,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 184 [2022-07-23 00:14:23,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:23,691 INFO L225 Difference]: With dead ends: 4130 [2022-07-23 00:14:23,707 INFO L226 Difference]: Without dead ends: 2682 [2022-07-23 00:14:23,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-23 00:14:23,714 INFO L413 NwaCegarLoop]: 2182 mSDtfsCounter, 1891 mSDsluCounter, 1692 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1891 SdHoareTripleChecker+Valid, 3874 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:23,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1891 Valid, 3874 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 00:14:23,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2022-07-23 00:14:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2675. [2022-07-23 00:14:23,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2675 states, 2020 states have (on average 1.397029702970297) internal successors, (2822), 2042 states have internal predecessors, (2822), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2022-07-23 00:14:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2675 states to 2675 states and 3805 transitions. [2022-07-23 00:14:23,904 INFO L78 Accepts]: Start accepts. Automaton has 2675 states and 3805 transitions. Word has length 184 [2022-07-23 00:14:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:23,905 INFO L495 AbstractCegarLoop]: Abstraction has 2675 states and 3805 transitions. [2022-07-23 00:14:23,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-23 00:14:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2675 states and 3805 transitions. [2022-07-23 00:14:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-23 00:14:23,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:23,924 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:23,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 00:14:24,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:24,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:24,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:24,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1054823839, now seen corresponding path program 1 times [2022-07-23 00:14:24,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:24,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689976650] [2022-07-23 00:14:24,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:24,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-23 00:14:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-23 00:14:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-23 00:14:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-07-23 00:14:24,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-07-23 00:14:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-07-23 00:14:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-23 00:14:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-23 00:14:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-23 00:14:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:24,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-07-23 00:14:24,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689976650] [2022-07-23 00:14:24,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-23 00:14:24,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788514032] [2022-07-23 00:14:24,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:24,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:24,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:24,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:14:24,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 00:14:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:25,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 2568 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 00:14:25,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 00:14:25,653 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:14:25,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788514032] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:25,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:25,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 00:14:25,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473188148] [2022-07-23 00:14:25,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:25,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 00:14:25,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:25,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 00:14:25,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:25,655 INFO L87 Difference]: Start difference. First operand 2675 states and 3805 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-23 00:14:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:25,915 INFO L93 Difference]: Finished difference Result 5555 states and 7893 transitions. [2022-07-23 00:14:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 00:14:25,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 185 [2022-07-23 00:14:25,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:25,947 INFO L225 Difference]: With dead ends: 5555 [2022-07-23 00:14:25,947 INFO L226 Difference]: Without dead ends: 2904 [2022-07-23 00:14:25,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-23 00:14:25,961 INFO L413 NwaCegarLoop]: 2203 mSDtfsCounter, 341 mSDsluCounter, 4053 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 6256 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:25,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 6256 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 00:14:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2022-07-23 00:14:26,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2675. [2022-07-23 00:14:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2675 states, 2020 states have (on average 1.397029702970297) internal successors, (2822), 2042 states have internal predecessors, (2822), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2022-07-23 00:14:26,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2675 states to 2675 states and 3805 transitions. [2022-07-23 00:14:26,157 INFO L78 Accepts]: Start accepts. Automaton has 2675 states and 3805 transitions. Word has length 185 [2022-07-23 00:14:26,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:26,157 INFO L495 AbstractCegarLoop]: Abstraction has 2675 states and 3805 transitions. [2022-07-23 00:14:26,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 4 states have internal predecessors, (127), 2 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2022-07-23 00:14:26,158 INFO L276 IsEmpty]: Start isEmpty. Operand 2675 states and 3805 transitions. [2022-07-23 00:14:26,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-07-23 00:14:26,182 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:26,182 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:26,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 00:14:26,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:26,404 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:26,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1974703137, now seen corresponding path program 1 times [2022-07-23 00:14:26,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:26,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596991540] [2022-07-23 00:14:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:26,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:26,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:26,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-23 00:14:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-23 00:14:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-23 00:14:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 00:14:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-23 00:14:26,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-23 00:14:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-07-23 00:14:26,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-23 00:14:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-23 00:14:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-23 00:14:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-23 00:14:26,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-07-23 00:14:26,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-23 00:14:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:26,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-07-23 00:14:26,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:26,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596991540] [2022-07-23 00:14:26,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-23 00:14:26,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611564592] [2022-07-23 00:14:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:26,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:26,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:26,895 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:14:26,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 00:14:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:27,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 2814 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-23 00:14:27,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-23 00:14:27,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:14:27,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611564592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:27,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:27,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 00:14:27,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995001273] [2022-07-23 00:14:27,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:27,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 00:14:27,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:27,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 00:14:27,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:27,779 INFO L87 Difference]: Start difference. First operand 2675 states and 3805 transitions. Second operand has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-23 00:14:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:27,978 INFO L93 Difference]: Finished difference Result 5327 states and 7585 transitions. [2022-07-23 00:14:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 00:14:27,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 228 [2022-07-23 00:14:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:27,988 INFO L225 Difference]: With dead ends: 5327 [2022-07-23 00:14:27,999 INFO L226 Difference]: Without dead ends: 2676 [2022-07-23 00:14:28,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-23 00:14:28,021 INFO L413 NwaCegarLoop]: 1921 mSDtfsCounter, 0 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3837 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:28,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3837 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 00:14:28,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2022-07-23 00:14:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2676. [2022-07-23 00:14:28,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2021 states have (on average 1.396833250865908) internal successors, (2823), 2043 states have internal predecessors, (2823), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2022-07-23 00:14:28,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3806 transitions. [2022-07-23 00:14:28,197 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3806 transitions. Word has length 228 [2022-07-23 00:14:28,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:28,198 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 3806 transitions. [2022-07-23 00:14:28,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.0) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-23 00:14:28,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3806 transitions. [2022-07-23 00:14:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-07-23 00:14:28,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:28,220 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:28,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 00:14:28,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:28,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:28,440 INFO L85 PathProgramCache]: Analyzing trace with hash -161180065, now seen corresponding path program 1 times [2022-07-23 00:14:28,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:28,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388197136] [2022-07-23 00:14:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:28,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 00:14:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-23 00:14:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-23 00:14:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-23 00:14:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-23 00:14:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-23 00:14:28,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-23 00:14:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-23 00:14:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-23 00:14:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-23 00:14:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-07-23 00:14:28,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-07-23 00:14:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:28,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-23 00:14:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2022-07-23 00:14:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-23 00:14:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2022-07-23 00:14:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-07-23 00:14:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2022-07-23 00:14:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:28,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-07-23 00:14:28,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388197136] [2022-07-23 00:14:28,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-07-23 00:14:28,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508111164] [2022-07-23 00:14:28,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:28,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:28,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:28,936 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:14:28,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 00:14:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 2817 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 00:14:29,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-23 00:14:30,062 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:14:30,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508111164] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:30,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:30,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 00:14:30,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152952576] [2022-07-23 00:14:30,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:30,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 00:14:30,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:30,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 00:14:30,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-23 00:14:30,065 INFO L87 Difference]: Start difference. First operand 2676 states and 3806 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-23 00:14:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:30,294 INFO L93 Difference]: Finished difference Result 5328 states and 7585 transitions. [2022-07-23 00:14:30,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 00:14:30,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 228 [2022-07-23 00:14:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:30,307 INFO L225 Difference]: With dead ends: 5328 [2022-07-23 00:14:30,320 INFO L226 Difference]: Without dead ends: 2676 [2022-07-23 00:14:30,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-07-23 00:14:30,344 INFO L413 NwaCegarLoop]: 1917 mSDtfsCounter, 1839 mSDsluCounter, 1914 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1839 SdHoareTripleChecker+Valid, 3831 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:30,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1839 Valid, 3831 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 00:14:30,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2022-07-23 00:14:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2676. [2022-07-23 00:14:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2021 states have (on average 1.396338446313706) internal successors, (2822), 2043 states have internal predecessors, (2822), 492 states have call successors, (492), 163 states have call predecessors, (492), 162 states have return successors, (491), 483 states have call predecessors, (491), 491 states have call successors, (491) [2022-07-23 00:14:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 3805 transitions. [2022-07-23 00:14:30,658 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 3805 transitions. Word has length 228 [2022-07-23 00:14:30,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:30,659 INFO L495 AbstractCegarLoop]: Abstraction has 2676 states and 3805 transitions. [2022-07-23 00:14:30,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 2 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2022-07-23 00:14:30,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 3805 transitions. [2022-07-23 00:14:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-07-23 00:14:30,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:30,667 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:30,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 00:14:30,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:30,884 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:30,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:30,884 INFO L85 PathProgramCache]: Analyzing trace with hash 256708637, now seen corresponding path program 1 times [2022-07-23 00:14:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:30,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718671005] [2022-07-23 00:14:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:30,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:31,002 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 00:14:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710599872] [2022-07-23 00:14:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:31,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:31,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:31,023 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:14:31,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 00:14:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:32,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 2820 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 00:14:32,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-23 00:14:32,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:14:32,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:32,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718671005] [2022-07-23 00:14:32,081 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 00:14:32,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710599872] [2022-07-23 00:14:32,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710599872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:14:32,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:14:32,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 00:14:32,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054705550] [2022-07-23 00:14:32,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:14:32,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 00:14:32,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:32,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 00:14:32,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 00:14:32,084 INFO L87 Difference]: Start difference. First operand 2676 states and 3805 transitions. Second operand has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-07-23 00:14:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:32,520 INFO L93 Difference]: Finished difference Result 5775 states and 8228 transitions. [2022-07-23 00:14:32,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 00:14:32,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) Word has length 228 [2022-07-23 00:14:32,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:32,552 INFO L225 Difference]: With dead ends: 5775 [2022-07-23 00:14:32,552 INFO L226 Difference]: Without dead ends: 3123 [2022-07-23 00:14:32,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-23 00:14:32,576 INFO L413 NwaCegarLoop]: 2233 mSDtfsCounter, 681 mSDsluCounter, 8628 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 10861 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:32,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 10861 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 00:14:32,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3123 states. [2022-07-23 00:14:32,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3123 to 2682. [2022-07-23 00:14:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2682 states, 2025 states have (on average 1.3955555555555557) internal successors, (2826), 2047 states have internal predecessors, (2826), 494 states have call successors, (494), 163 states have call predecessors, (494), 162 states have return successors, (493), 485 states have call predecessors, (493), 493 states have call successors, (493) [2022-07-23 00:14:32,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2682 states to 2682 states and 3813 transitions. [2022-07-23 00:14:32,788 INFO L78 Accepts]: Start accepts. Automaton has 2682 states and 3813 transitions. Word has length 228 [2022-07-23 00:14:32,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:32,802 INFO L495 AbstractCegarLoop]: Abstraction has 2682 states and 3813 transitions. [2022-07-23 00:14:32,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 3 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (26), 3 states have call predecessors, (26), 3 states have call successors, (26) [2022-07-23 00:14:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 2682 states and 3813 transitions. [2022-07-23 00:14:32,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-07-23 00:14:32,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:32,811 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:32,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 00:14:33,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-23 00:14:33,032 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash -967426800, now seen corresponding path program 1 times [2022-07-23 00:14:33,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:33,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098321317] [2022-07-23 00:14:33,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:33,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:33,153 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 00:14:33,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1632005077] [2022-07-23 00:14:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:33,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:33,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:33,155 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:14:33,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 00:14:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:34,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 2860 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-23 00:14:34,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:34,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 00:14:34,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-23 00:14:34,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-23 00:14:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 23 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-23 00:14:35,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 00:14:35,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2022-07-23 00:14:35,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-23 00:14:35,566 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-23 00:14:35,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:14:35,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098321317] [2022-07-23 00:14:35,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 00:14:35,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632005077] [2022-07-23 00:14:35,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632005077] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 00:14:35,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 00:14:35,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 33 [2022-07-23 00:14:35,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23504991] [2022-07-23 00:14:35,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 00:14:35,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 00:14:35,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:14:35,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 00:14:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 00:14:35,568 INFO L87 Difference]: Start difference. First operand 2682 states and 3813 transitions. Second operand has 33 states, 33 states have (on average 8.727272727272727) internal successors, (288), 28 states have internal predecessors, (288), 16 states have call successors, (54), 6 states have call predecessors, (54), 6 states have return successors, (50), 18 states have call predecessors, (50), 15 states have call successors, (50) [2022-07-23 00:14:43,584 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 [] [2022-07-23 00:14:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:14:54,808 INFO L93 Difference]: Finished difference Result 7274 states and 10609 transitions. [2022-07-23 00:14:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 00:14:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 8.727272727272727) internal successors, (288), 28 states have internal predecessors, (288), 16 states have call successors, (54), 6 states have call predecessors, (54), 6 states have return successors, (50), 18 states have call predecessors, (50), 15 states have call successors, (50) Word has length 232 [2022-07-23 00:14:54,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:14:54,869 INFO L225 Difference]: With dead ends: 7274 [2022-07-23 00:14:54,870 INFO L226 Difference]: Without dead ends: 4616 [2022-07-23 00:14:54,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=262, Invalid=1718, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 00:14:54,887 INFO L413 NwaCegarLoop]: 1923 mSDtfsCounter, 7345 mSDsluCounter, 25759 mSDsCounter, 0 mSdLazyCounter, 9057 mSolverCounterSat, 1513 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7387 SdHoareTripleChecker+Valid, 27682 SdHoareTripleChecker+Invalid, 11887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1513 IncrementalHoareTripleChecker+Valid, 9057 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 1316 IncrementalHoareTripleChecker+Unchecked, 18.1s IncrementalHoareTripleChecker+Time [2022-07-23 00:14:54,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7387 Valid, 27682 Invalid, 11887 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1513 Valid, 9057 Invalid, 1 Unknown, 1316 Unchecked, 18.1s Time] [2022-07-23 00:14:54,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4616 states. [2022-07-23 00:14:55,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4616 to 4075. [2022-07-23 00:14:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4075 states, 3120 states have (on average 1.426923076923077) internal successors, (4452), 3160 states have internal predecessors, (4452), 765 states have call successors, (765), 189 states have call predecessors, (765), 189 states have return successors, (766), 747 states have call predecessors, (766), 764 states have call successors, (766) [2022-07-23 00:14:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4075 states to 4075 states and 5983 transitions. [2022-07-23 00:14:55,370 INFO L78 Accepts]: Start accepts. Automaton has 4075 states and 5983 transitions. Word has length 232 [2022-07-23 00:14:55,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:14:55,371 INFO L495 AbstractCegarLoop]: Abstraction has 4075 states and 5983 transitions. [2022-07-23 00:14:55,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 8.727272727272727) internal successors, (288), 28 states have internal predecessors, (288), 16 states have call successors, (54), 6 states have call predecessors, (54), 6 states have return successors, (50), 18 states have call predecessors, (50), 15 states have call successors, (50) [2022-07-23 00:14:55,371 INFO L276 IsEmpty]: Start isEmpty. Operand 4075 states and 5983 transitions. [2022-07-23 00:14:55,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-23 00:14:55,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:14:55,396 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:14:55,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-23 00:14:55,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:55,632 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:14:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:14:55,632 INFO L85 PathProgramCache]: Analyzing trace with hash -28582180, now seen corresponding path program 1 times [2022-07-23 00:14:55,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:14:55,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431665726] [2022-07-23 00:14:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:55,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:14:55,776 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 00:14:55,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1053661231] [2022-07-23 00:14:55,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:14:55,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:14:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:14:55,780 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:14:55,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 00:14:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:14:56,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 2902 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-23 00:14:56,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:14:56,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-07-23 00:15:01,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:15:01,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:15:01,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:15:01,978 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1661 (Array Int Int))) (= (store |c_old(#memory_int)| |c_usb_set_intfdata_#in~intf#1.base| v_ArrVal_1661) |c_#memory_int|)) is different from true [2022-07-23 00:15:02,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:15:02,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 00:15:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-23 00:15:02,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 00:15:04,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:15:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431665726] [2022-07-23 00:15:04,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 00:15:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053661231] [2022-07-23 00:15:04,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053661231] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 00:15:04,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 00:15:04,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-23 00:15:04,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791173958] [2022-07-23 00:15:04,237 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 00:15:04,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 00:15:04,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:15:04,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 00:15:04,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=4, NotChecked=42, Total=552 [2022-07-23 00:15:04,238 INFO L87 Difference]: Start difference. First operand 4075 states and 5983 transitions. Second operand has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 18 states have internal predecessors, (169), 9 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2022-07-23 00:15:23,287 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 [] [2022-07-23 00:15:25,472 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:15:27,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:15:33,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:15:35,497 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:15:40,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:15:40,758 INFO L93 Difference]: Finished difference Result 8333 states and 12360 transitions. [2022-07-23 00:15:40,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-23 00:15:40,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 18 states have internal predecessors, (169), 9 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) Word has length 239 [2022-07-23 00:15:40,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:15:40,822 INFO L225 Difference]: With dead ends: 8333 [2022-07-23 00:15:40,835 INFO L226 Difference]: Without dead ends: 5675 [2022-07-23 00:15:40,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 285 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=152, Invalid=1034, Unknown=8, NotChecked=66, Total=1260 [2022-07-23 00:15:40,862 INFO L413 NwaCegarLoop]: 2491 mSDtfsCounter, 1466 mSDsluCounter, 21177 mSDsCounter, 0 mSdLazyCounter, 9245 mSolverCounterSat, 418 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1612 SdHoareTripleChecker+Valid, 23668 SdHoareTripleChecker+Invalid, 16910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 9245 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 7242 IncrementalHoareTripleChecker+Unchecked, 25.8s IncrementalHoareTripleChecker+Time [2022-07-23 00:15:40,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1612 Valid, 23668 Invalid, 16910 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [418 Valid, 9245 Invalid, 5 Unknown, 7242 Unchecked, 25.8s Time] [2022-07-23 00:15:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5675 states. [2022-07-23 00:15:41,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5675 to 4643. [2022-07-23 00:15:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 3591 states have (on average 1.434976329713172) internal successors, (5153), 3640 states have internal predecessors, (5153), 842 states have call successors, (842), 204 states have call predecessors, (842), 209 states have return successors, (882), 821 states have call predecessors, (882), 841 states have call successors, (882) [2022-07-23 00:15:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 6877 transitions. [2022-07-23 00:15:41,312 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 6877 transitions. Word has length 239 [2022-07-23 00:15:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:15:41,313 INFO L495 AbstractCegarLoop]: Abstraction has 4643 states and 6877 transitions. [2022-07-23 00:15:41,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.681818181818182) internal successors, (169), 18 states have internal predecessors, (169), 9 states have call successors, (31), 5 states have call predecessors, (31), 8 states have return successors, (28), 12 states have call predecessors, (28), 9 states have call successors, (28) [2022-07-23 00:15:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 6877 transitions. [2022-07-23 00:15:41,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-07-23 00:15:41,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:15:41,329 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:15:41,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 00:15:41,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-23 00:15:41,554 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:15:41,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:15:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash 258419187, now seen corresponding path program 1 times [2022-07-23 00:15:41,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:15:41,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184890910] [2022-07-23 00:15:41,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:15:41,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:15:41,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 00:15:41,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364120038] [2022-07-23 00:15:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:15:41,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:15:41,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:15:41,686 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:15:41,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 00:15:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:15:42,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 2946 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 00:15:42,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:15:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-23 00:15:42,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 00:15:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:15:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184890910] [2022-07-23 00:15:42,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 00:15:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364120038] [2022-07-23 00:15:42,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364120038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 00:15:42,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 00:15:42,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 00:15:42,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297629932] [2022-07-23 00:15:42,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 00:15:42,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 00:15:42,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:15:42,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 00:15:42,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:15:42,527 INFO L87 Difference]: Start difference. First operand 4643 states and 6877 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-07-23 00:15:42,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:15:42,745 INFO L93 Difference]: Finished difference Result 8745 states and 12933 transitions. [2022-07-23 00:15:42,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 00:15:42,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) Word has length 247 [2022-07-23 00:15:42,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:15:42,764 INFO L225 Difference]: With dead ends: 8745 [2022-07-23 00:15:42,765 INFO L226 Difference]: Without dead ends: 4677 [2022-07-23 00:15:42,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 00:15:42,781 INFO L413 NwaCegarLoop]: 1922 mSDtfsCounter, 3 mSDsluCounter, 5758 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7680 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 00:15:42,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 7680 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 00:15:42,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4677 states. [2022-07-23 00:15:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4677 to 4659. [2022-07-23 00:15:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 3604 states have (on average 1.4334073251942285) internal successors, (5166), 3650 states have internal predecessors, (5166), 843 states have call successors, (843), 204 states have call predecessors, (843), 211 states have return successors, (893), 827 states have call predecessors, (893), 842 states have call successors, (893) [2022-07-23 00:15:43,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 6902 transitions. [2022-07-23 00:15:43,179 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 6902 transitions. Word has length 247 [2022-07-23 00:15:43,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:15:43,198 INFO L495 AbstractCegarLoop]: Abstraction has 4659 states and 6902 transitions. [2022-07-23 00:15:43,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (29), 3 states have call predecessors, (29), 2 states have call successors, (29) [2022-07-23 00:15:43,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 6902 transitions. [2022-07-23 00:15:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-07-23 00:15:43,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:15:43,216 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:15:43,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-23 00:15:43,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-23 00:15:43,443 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:15:43,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:15:43,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2145298580, now seen corresponding path program 1 times [2022-07-23 00:15:43,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:15:43,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569563846] [2022-07-23 00:15:43,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:15:43,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:15:43,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 00:15:43,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568502854] [2022-07-23 00:15:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:15:43,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:15:43,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:15:43,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:15:43,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 00:15:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:15:44,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 2917 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-23 00:15:44,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:15:44,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-07-23 00:15:50,721 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2055 (Array Int Int))) (= (store |c_old(#memory_int)| |c_#Ultimate.C_memset_#ptr.base| v_ArrVal_2055) |c_#memory_int|)) is different from true [2022-07-23 00:15:50,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 00:15:50,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:16:17,301 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:16:17,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:16:23,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:16:23,523 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2059 (Array Int Int))) (= (store |c_old(#memory_int)| |c_usb_set_intfdata_#in~intf#1.base| v_ArrVal_2059) |c_#memory_int|)) is different from true [2022-07-23 00:16:23,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:16:54,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 00:16:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 6 refuted. 0 times theorem prover too weak. 17 trivial. 1 not checked. [2022-07-23 00:16:54,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 00:16:57,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:16:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569563846] [2022-07-23 00:16:57,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 00:16:57,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568502854] [2022-07-23 00:16:57,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568502854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 00:16:57,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 00:16:57,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-07-23 00:16:57,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954248957] [2022-07-23 00:16:57,278 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 00:16:57,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-23 00:16:57,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:16:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-23 00:16:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=555, Unknown=20, NotChecked=98, Total=756 [2022-07-23 00:16:57,279 INFO L87 Difference]: Start difference. First operand 4659 states and 6902 transitions. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 22 states have internal predecessors, (170), 10 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) [2022-07-23 00:17:49,237 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 [] [2022-07-23 00:17:51,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:17:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:17:55,579 INFO L93 Difference]: Finished difference Result 9584 states and 14336 transitions. [2022-07-23 00:17:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 00:17:55,580 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 22 states have internal predecessors, (170), 10 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) Word has length 240 [2022-07-23 00:17:55,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:17:55,651 INFO L225 Difference]: With dead ends: 9584 [2022-07-23 00:17:55,655 INFO L226 Difference]: Without dead ends: 6895 [2022-07-23 00:17:55,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 284 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 110.4s TimeCoverageRelationStatistics Valid=179, Invalid=1432, Unknown=37, NotChecked=158, Total=1806 [2022-07-23 00:17:55,685 INFO L413 NwaCegarLoop]: 2612 mSDtfsCounter, 1732 mSDsluCounter, 22842 mSDsCounter, 0 mSdLazyCounter, 10165 mSolverCounterSat, 363 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 25454 SdHoareTripleChecker+Invalid, 21334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 10165 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 10805 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2022-07-23 00:17:55,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1906 Valid, 25454 Invalid, 21334 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [363 Valid, 10165 Invalid, 1 Unknown, 10805 Unchecked, 19.2s Time] [2022-07-23 00:17:55,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6895 states. [2022-07-23 00:17:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6895 to 5257. [2022-07-23 00:17:56,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 4099 states have (on average 1.4423030007318858) internal successors, (5912), 4158 states have internal predecessors, (5912), 927 states have call successors, (927), 218 states have call predecessors, (927), 230 states have return successors, (1012), 904 states have call predecessors, (1012), 926 states have call successors, (1012) [2022-07-23 00:17:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 7851 transitions. [2022-07-23 00:17:56,225 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 7851 transitions. Word has length 240 [2022-07-23 00:17:56,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:17:56,228 INFO L495 AbstractCegarLoop]: Abstraction has 5257 states and 7851 transitions. [2022-07-23 00:17:56,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 22 states have internal predecessors, (170), 10 states have call successors, (31), 6 states have call predecessors, (31), 9 states have return successors, (28), 12 states have call predecessors, (28), 10 states have call successors, (28) [2022-07-23 00:17:56,228 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 7851 transitions. [2022-07-23 00:17:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-07-23 00:17:56,272 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:17:56,272 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:17:56,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-23 00:17:56,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-23 00:17:56,473 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:17:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:17:56,474 INFO L85 PathProgramCache]: Analyzing trace with hash -286806896, now seen corresponding path program 1 times [2022-07-23 00:17:56,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:17:56,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70299966] [2022-07-23 00:17:56,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:17:56,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:17:56,634 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 00:17:56,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075951467] [2022-07-23 00:17:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:17:56,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:17:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:17:56,643 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:17:56,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 00:17:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 00:17:57,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 3009 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-23 00:17:57,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:17:57,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-07-23 00:18:02,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:18:02,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:18:02,566 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:18:02,642 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2254 (Array Int Int))) (= (store |c_old(#memory_int)| |c_usb_set_intfdata_#in~intf#1.base| v_ArrVal_2254) |c_#memory_int|)) is different from true [2022-07-23 00:18:02,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2022-07-23 00:18:03,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-23 00:18:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 00:18:03,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 00:18:04,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:18:04,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70299966] [2022-07-23 00:18:04,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 00:18:04,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075951467] [2022-07-23 00:18:04,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075951467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 00:18:04,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 00:18:04,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-07-23 00:18:04,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204560415] [2022-07-23 00:18:04,674 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 00:18:04,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-23 00:18:04,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:18:04,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-23 00:18:04,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=4, NotChecked=42, Total=552 [2022-07-23 00:18:04,675 INFO L87 Difference]: Start difference. First operand 5257 states and 7851 transitions. Second operand has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 18 states have internal predecessors, (179), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) [2022-07-23 00:18:23,715 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 [] [2022-07-23 00:18:25,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:18:28,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:18:35,712 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:18:37,893 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-23 00:18:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 00:18:42,581 INFO L93 Difference]: Finished difference Result 10037 states and 15040 transitions. [2022-07-23 00:18:42,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 00:18:42,582 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 18 states have internal predecessors, (179), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) Word has length 257 [2022-07-23 00:18:42,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 00:18:42,613 INFO L225 Difference]: With dead ends: 10037 [2022-07-23 00:18:42,613 INFO L226 Difference]: Without dead ends: 7348 [2022-07-23 00:18:42,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 302 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=172, Invalid=1230, Unknown=8, NotChecked=72, Total=1482 [2022-07-23 00:18:42,627 INFO L413 NwaCegarLoop]: 2532 mSDtfsCounter, 1599 mSDsluCounter, 22911 mSDsCounter, 0 mSdLazyCounter, 10582 mSolverCounterSat, 413 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1745 SdHoareTripleChecker+Valid, 25443 SdHoareTripleChecker+Invalid, 18582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 413 IncrementalHoareTripleChecker+Valid, 10582 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 7582 IncrementalHoareTripleChecker+Unchecked, 27.0s IncrementalHoareTripleChecker+Time [2022-07-23 00:18:42,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1745 Valid, 25443 Invalid, 18582 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [413 Valid, 10582 Invalid, 5 Unknown, 7582 Unchecked, 27.0s Time] [2022-07-23 00:18:42,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7348 states. [2022-07-23 00:18:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7348 to 6124. [2022-07-23 00:18:42,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6124 states, 4798 states have (on average 1.4485202167569822) internal successors, (6950), 4868 states have internal predecessors, (6950), 1063 states have call successors, (1063), 245 states have call predecessors, (1063), 262 states have return successors, (1197), 1036 states have call predecessors, (1197), 1062 states have call successors, (1197) [2022-07-23 00:18:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6124 states to 6124 states and 9210 transitions. [2022-07-23 00:18:42,917 INFO L78 Accepts]: Start accepts. Automaton has 6124 states and 9210 transitions. Word has length 257 [2022-07-23 00:18:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 00:18:42,918 INFO L495 AbstractCegarLoop]: Abstraction has 6124 states and 9210 transitions. [2022-07-23 00:18:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 8.136363636363637) internal successors, (179), 18 states have internal predecessors, (179), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (31), 12 states have call predecessors, (31), 9 states have call successors, (31) [2022-07-23 00:18:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 6124 states and 9210 transitions. [2022-07-23 00:18:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-07-23 00:18:42,933 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 00:18:42,933 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 00:18:42,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 00:18:43,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-23 00:18:43,157 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-23 00:18:43,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 00:18:43,158 INFO L85 PathProgramCache]: Analyzing trace with hash 955969756, now seen corresponding path program 2 times [2022-07-23 00:18:43,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 00:18:43,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958301680] [2022-07-23 00:18:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 00:18:43,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 00:18:43,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 00:18:43,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867076519] [2022-07-23 00:18:43,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 00:18:43,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 00:18:43,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 00:18:43,262 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 00:18:43,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 00:18:44,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 00:18:44,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 00:18:44,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 2932 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 00:18:44,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 00:18:45,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 00:18:45,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-23 00:18:45,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-07-23 00:18:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-23 00:18:45,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 00:18:46,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 00:18:46,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958301680] [2022-07-23 00:18:46,256 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 00:18:46,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867076519] [2022-07-23 00:18:46,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867076519] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 00:18:46,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 00:18:46,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-23 00:18:46,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599649227] [2022-07-23 00:18:46,256 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 00:18:46,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 00:18:46,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 00:18:46,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 00:18:46,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-23 00:18:46,257 INFO L87 Difference]: Start difference. First operand 6124 states and 9210 transitions. Second operand has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 15 states have internal predecessors, (157), 9 states have call successors, (30), 4 states have call predecessors, (30), 3 states have return successors, (27), 9 states have call predecessors, (27), 8 states have call successors, (27)