./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-18 04:41:17,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-18 04:41:17,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-18 04:41:17,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-18 04:41:17,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-18 04:41:17,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-18 04:41:17,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-18 04:41:17,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-18 04:41:17,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-18 04:41:17,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-18 04:41:17,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-18 04:41:17,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-18 04:41:17,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-18 04:41:17,542 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-18 04:41:17,543 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-18 04:41:17,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-18 04:41:17,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-18 04:41:17,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-18 04:41:17,550 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-18 04:41:17,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-18 04:41:17,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-18 04:41:17,555 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-18 04:41:17,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-18 04:41:17,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-18 04:41:17,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-18 04:41:17,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-18 04:41:17,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-18 04:41:17,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-18 04:41:17,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-18 04:41:17,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-18 04:41:17,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-18 04:41:17,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-18 04:41:17,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-18 04:41:17,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-18 04:41:17,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-18 04:41:17,568 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-18 04:41:17,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-18 04:41:17,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-18 04:41:17,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-18 04:41:17,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-18 04:41:17,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-18 04:41:17,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-18 04:41:17,596 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-18 04:41:17,596 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-18 04:41:17,597 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-18 04:41:17,597 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-18 04:41:17,598 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-18 04:41:17,598 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-18 04:41:17,598 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-18 04:41:17,599 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-18 04:41:17,599 INFO L138 SettingsManager]: * Use SBE=true [2021-12-18 04:41:17,599 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-18 04:41:17,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-18 04:41:17,600 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-18 04:41:17,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-18 04:41:17,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-18 04:41:17,600 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-18 04:41:17,600 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-18 04:41:17,600 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-18 04:41:17,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-18 04:41:17,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-18 04:41:17,601 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-18 04:41:17,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-18 04:41:17,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 04:41:17,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-18 04:41:17,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-18 04:41:17,602 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-18 04:41:17,602 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-18 04:41:17,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-18 04:41:17,603 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-18 04:41:17,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-18 04:41:17,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-18 04:41:17,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-18 04:41:17,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2021-12-18 04:41:17,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-18 04:41:17,838 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-18 04:41:17,841 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-18 04:41:17,842 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-18 04:41:17,842 INFO L275 PluginConnector]: CDTParser initialized [2021-12-18 04:41:17,844 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-12-18 04:41:17,918 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc65050a0/7633747a5739483ca11f5297be916460/FLAG2da4dc9e3 [2021-12-18 04:41:18,632 INFO L306 CDTParser]: Found 1 translation units. [2021-12-18 04:41:18,633 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-12-18 04:41:18,681 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc65050a0/7633747a5739483ca11f5297be916460/FLAG2da4dc9e3 [2021-12-18 04:41:18,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bc65050a0/7633747a5739483ca11f5297be916460 [2021-12-18 04:41:18,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-18 04:41:18,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-18 04:41:18,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-18 04:41:18,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-18 04:41:18,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-18 04:41:18,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:41:18" (1/1) ... [2021-12-18 04:41:18,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71076c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:18, skipping insertion in model container [2021-12-18 04:41:18,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 04:41:18" (1/1) ... [2021-12-18 04:41:18,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-18 04:41:19,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-18 04:41:19,531 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2021-12-18 04:41:19,531 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2021-12-18 04:41:19,802 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2021-12-18 04:41:20,660 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 04:41:20,683 INFO L203 MainTranslator]: Completed pre-run [2021-12-18 04:41:20,788 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2021-12-18 04:41:20,790 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2021-12-18 04:41:20,796 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2021-12-18 04:41:20,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-18 04:41:21,023 INFO L208 MainTranslator]: Completed translation [2021-12-18 04:41:21,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21 WrapperNode [2021-12-18 04:41:21,024 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-18 04:41:21,025 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-18 04:41:21,025 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-18 04:41:21,025 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-18 04:41:21,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,208 INFO L137 Inliner]: procedures = 202, calls = 1968, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2095 [2021-12-18 04:41:21,209 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-18 04:41:21,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-18 04:41:21,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-18 04:41:21,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-18 04:41:21,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,288 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-18 04:41:21,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-18 04:41:21,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-18 04:41:21,348 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-18 04:41:21,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (1/1) ... [2021-12-18 04:41:21,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-18 04:41:21,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 04:41:21,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-18 04:41:21,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-18 04:41:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-12-18 04:41:21,422 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-12-18 04:41:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-18 04:41:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-18 04:41:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-18 04:41:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-18 04:41:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-18 04:41:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-18 04:41:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-12-18 04:41:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-12-18 04:41:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-18 04:41:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-18 04:41:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-18 04:41:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-18 04:41:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-18 04:41:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-18 04:41:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2021-12-18 04:41:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2021-12-18 04:41:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-18 04:41:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-18 04:41:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-18 04:41:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-18 04:41:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-12-18 04:41:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-12-18 04:41:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-18 04:41:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-18 04:41:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2021-12-18 04:41:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2021-12-18 04:41:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-18 04:41:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-18 04:41:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-18 04:41:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-18 04:41:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-12-18 04:41:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-12-18 04:41:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-18 04:41:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-18 04:41:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-18 04:41:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-18 04:41:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-18 04:41:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-18 04:41:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-18 04:41:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2021-12-18 04:41:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2021-12-18 04:41:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2021-12-18 04:41:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2021-12-18 04:41:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-18 04:41:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-18 04:41:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-18 04:41:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2021-12-18 04:41:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2021-12-18 04:41:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2021-12-18 04:41:21,431 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2021-12-18 04:41:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-18 04:41:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-18 04:41:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-18 04:41:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2021-12-18 04:41:21,433 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2021-12-18 04:41:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-18 04:41:21,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-18 04:41:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-12-18 04:41:21,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-12-18 04:41:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-18 04:41:21,434 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-18 04:41:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-18 04:41:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2021-12-18 04:41:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2021-12-18 04:41:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-18 04:41:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-18 04:41:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-18 04:41:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-18 04:41:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2021-12-18 04:41:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2021-12-18 04:41:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-18 04:41:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2021-12-18 04:41:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2021-12-18 04:41:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2021-12-18 04:41:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2021-12-18 04:41:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-18 04:41:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-18 04:41:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-18 04:41:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-18 04:41:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-18 04:41:21,824 INFO L236 CfgBuilder]: Building ICFG [2021-12-18 04:41:21,827 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-18 04:41:22,026 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-18 04:41:25,255 INFO L277 CfgBuilder]: Performing block encoding [2021-12-18 04:41:25,263 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-18 04:41:25,264 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-18 04:41:25,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:41:25 BoogieIcfgContainer [2021-12-18 04:41:25,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-18 04:41:25,267 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-18 04:41:25,267 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-18 04:41:25,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-18 04:41:25,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 04:41:18" (1/3) ... [2021-12-18 04:41:25,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35784a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:41:25, skipping insertion in model container [2021-12-18 04:41:25,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 04:41:21" (2/3) ... [2021-12-18 04:41:25,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35784a07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 04:41:25, skipping insertion in model container [2021-12-18 04:41:25,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 04:41:25" (3/3) ... [2021-12-18 04:41:25,275 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-12-18 04:41:25,281 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-18 04:41:25,282 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-18 04:41:25,328 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-18 04:41:25,339 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-18 04:41:25,339 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-18 04:41:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-18 04:41:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-18 04:41:25,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:41:25,373 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:41:25,374 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:41:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:41:25,378 INFO L85 PathProgramCache]: Analyzing trace with hash 2015975527, now seen corresponding path program 1 times [2021-12-18 04:41:25,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:41:25,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899491498] [2021-12-18 04:41:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:41:25,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:41:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:25,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:41:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-18 04:41:25,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:41:25,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899491498] [2021-12-18 04:41:25,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899491498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:41:25,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:41:25,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 04:41:25,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257040352] [2021-12-18 04:41:25,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:41:25,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 04:41:25,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:41:25,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 04:41:25,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 04:41:25,819 INFO L87 Difference]: Start difference. First operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 04:41:29,178 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 [] [2021-12-18 04:41:29,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:41:29,319 INFO L93 Difference]: Finished difference Result 1083 states and 1544 transitions. [2021-12-18 04:41:29,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-18 04:41:29,322 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-18 04:41:29,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:41:29,355 INFO L225 Difference]: With dead ends: 1083 [2021-12-18 04:41:29,355 INFO L226 Difference]: Without dead ends: 563 [2021-12-18 04:41:29,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-18 04:41:29,382 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 216 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-18 04:41:29,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1343 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 502 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2021-12-18 04:41:29,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-18 04:41:29,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2021-12-18 04:41:29,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 385 states have (on average 1.3428571428571427) internal successors, (517), 389 states have internal predecessors, (517), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-18 04:41:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 702 transitions. [2021-12-18 04:41:29,486 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 702 transitions. Word has length 30 [2021-12-18 04:41:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:41:29,486 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 702 transitions. [2021-12-18 04:41:29,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-18 04:41:29,488 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 702 transitions. [2021-12-18 04:41:29,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-18 04:41:29,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:41:29,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:41:29,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-18 04:41:29,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:41:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:41:29,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1592596621, now seen corresponding path program 1 times [2021-12-18 04:41:29,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:41:29,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316156177] [2021-12-18 04:41:29,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:41:29,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:41:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:29,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:41:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:29,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:41:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-18 04:41:29,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:41:29,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316156177] [2021-12-18 04:41:29,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316156177] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:41:29,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:41:29,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 04:41:29,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101474856] [2021-12-18 04:41:29,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:41:29,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 04:41:29,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:41:29,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 04:41:29,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 04:41:29,720 INFO L87 Difference]: Start difference. First operand 512 states and 702 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 04:41:33,398 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 [] [2021-12-18 04:41:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:41:33,532 INFO L93 Difference]: Finished difference Result 1067 states and 1492 transitions. [2021-12-18 04:41:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 04:41:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-12-18 04:41:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:41:33,537 INFO L225 Difference]: With dead ends: 1067 [2021-12-18 04:41:33,537 INFO L226 Difference]: Without dead ends: 571 [2021-12-18 04:41:33,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 04:41:33,540 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 173 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-18 04:41:33,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1314 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 495 Invalid, 1 Unknown, 0 Unchecked, 3.7s Time] [2021-12-18 04:41:33,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-18 04:41:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 519. [2021-12-18 04:41:33,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 392 states have (on average 1.344387755102041) internal successors, (527), 396 states have internal predecessors, (527), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-18 04:41:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 712 transitions. [2021-12-18 04:41:33,586 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 712 transitions. Word has length 49 [2021-12-18 04:41:33,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:41:33,586 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 712 transitions. [2021-12-18 04:41:33,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 04:41:33,598 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 712 transitions. [2021-12-18 04:41:33,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-18 04:41:33,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:41:33,600 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:41:33,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-18 04:41:33,600 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:41:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:41:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash -725279773, now seen corresponding path program 1 times [2021-12-18 04:41:33,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:41:33,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356103538] [2021-12-18 04:41:33,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:41:33,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:41:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:33,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:41:33,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:33,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:41:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 04:41:33,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:41:33,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356103538] [2021-12-18 04:41:33,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356103538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:41:33,786 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:41:33,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-18 04:41:33,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014613705] [2021-12-18 04:41:33,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:41:33,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-18 04:41:33,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:41:33,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-18 04:41:33,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 04:41:33,788 INFO L87 Difference]: Start difference. First operand 519 states and 712 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 04:41:36,975 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 [] [2021-12-18 04:41:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:41:37,087 INFO L93 Difference]: Finished difference Result 1115 states and 1567 transitions. [2021-12-18 04:41:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-18 04:41:37,088 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2021-12-18 04:41:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:41:37,091 INFO L225 Difference]: With dead ends: 1115 [2021-12-18 04:41:37,092 INFO L226 Difference]: Without dead ends: 612 [2021-12-18 04:41:37,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-18 04:41:37,094 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 222 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-18 04:41:37,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1315 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 501 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-12-18 04:41:37,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-12-18 04:41:37,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 560. [2021-12-18 04:41:37,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 431 states have (on average 1.359628770301624) internal successors, (586), 435 states have internal predecessors, (586), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-12-18 04:41:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 775 transitions. [2021-12-18 04:41:37,125 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 775 transitions. Word has length 55 [2021-12-18 04:41:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:41:37,126 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 775 transitions. [2021-12-18 04:41:37,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-18 04:41:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 775 transitions. [2021-12-18 04:41:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-18 04:41:37,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:41:37,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:41:37,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-18 04:41:37,129 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:41:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:41:37,129 INFO L85 PathProgramCache]: Analyzing trace with hash -232463337, now seen corresponding path program 1 times [2021-12-18 04:41:37,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:41:37,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401553831] [2021-12-18 04:41:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:41:37,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:41:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:37,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:41:37,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:37,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:41:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:37,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 04:41:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:37,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 04:41:37,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:41:37,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401553831] [2021-12-18 04:41:37,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401553831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:41:37,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:41:37,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 04:41:37,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993564931] [2021-12-18 04:41:37,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:41:37,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 04:41:37,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:41:37,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 04:41:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 04:41:37,276 INFO L87 Difference]: Start difference. First operand 560 states and 775 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 04:41:41,221 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:41:43,259 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:41:45,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:41:47,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:41:47,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:41:47,600 INFO L93 Difference]: Finished difference Result 1531 states and 2229 transitions. [2021-12-18 04:41:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 04:41:47,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2021-12-18 04:41:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:41:47,604 INFO L225 Difference]: With dead ends: 1531 [2021-12-18 04:41:47,605 INFO L226 Difference]: Without dead ends: 987 [2021-12-18 04:41:47,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 04:41:47,610 INFO L933 BasicCegarLoop]: 635 mSDtfsCounter, 701 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 346 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-18 04:41:47,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1543 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 933 Invalid, 4 Unknown, 0 Unchecked, 10.2s Time] [2021-12-18 04:41:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-12-18 04:41:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 562. [2021-12-18 04:41:47,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 433 states have (on average 1.3579676674364896) internal successors, (588), 437 states have internal predecessors, (588), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-12-18 04:41:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 777 transitions. [2021-12-18 04:41:47,642 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 777 transitions. Word has length 78 [2021-12-18 04:41:47,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:41:47,642 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 777 transitions. [2021-12-18 04:41:47,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 04:41:47,642 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 777 transitions. [2021-12-18 04:41:47,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-18 04:41:47,646 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:41:47,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:41:47,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-18 04:41:47,646 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:41:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:41:47,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1595880674, now seen corresponding path program 1 times [2021-12-18 04:41:47,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:41:47,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316018970] [2021-12-18 04:41:47,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:41:47,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:41:47,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:47,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:41:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:47,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:41:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:47,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 04:41:47,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:47,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:41:47,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-18 04:41:47,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:41:47,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316018970] [2021-12-18 04:41:47,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316018970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:41:47,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:41:47,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 04:41:47,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171071615] [2021-12-18 04:41:47,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:41:47,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 04:41:47,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:41:47,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 04:41:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 04:41:47,866 INFO L87 Difference]: Start difference. First operand 562 states and 777 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 04:41:50,849 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 [] [2021-12-18 04:41:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:41:51,435 INFO L93 Difference]: Finished difference Result 1344 states and 1870 transitions. [2021-12-18 04:41:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 04:41:51,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 81 [2021-12-18 04:41:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:41:51,440 INFO L225 Difference]: With dead ends: 1344 [2021-12-18 04:41:51,440 INFO L226 Difference]: Without dead ends: 798 [2021-12-18 04:41:51,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-18 04:41:51,442 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 944 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 424 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-18 04:41:51,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1303 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 777 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2021-12-18 04:41:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-18 04:41:51,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 703. [2021-12-18 04:41:51,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 537 states have (on average 1.3463687150837989) internal successors, (723), 542 states have internal predecessors, (723), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-18 04:41:51,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 958 transitions. [2021-12-18 04:41:51,465 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 958 transitions. Word has length 81 [2021-12-18 04:41:51,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:41:51,466 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 958 transitions. [2021-12-18 04:41:51,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-18 04:41:51,466 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 958 transitions. [2021-12-18 04:41:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 04:41:51,468 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:41:51,468 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:41:51,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-18 04:41:51,468 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:41:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:41:51,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1746632066, now seen corresponding path program 1 times [2021-12-18 04:41:51,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:41:51,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159674238] [2021-12-18 04:41:51,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:41:51,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:41:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:51,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:41:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:51,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:41:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:51,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 04:41:51,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:41:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 04:41:51,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:41:51,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159674238] [2021-12-18 04:41:51,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159674238] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:41:51,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:41:51,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 04:41:51,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086683102] [2021-12-18 04:41:51,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:41:51,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 04:41:51,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:41:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 04:41:51,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 04:41:51,624 INFO L87 Difference]: Start difference. First operand 703 states and 958 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 04:41:56,054 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 [] [2021-12-18 04:41:58,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:00,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:02,337 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:02,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:42:02,494 INFO L93 Difference]: Finished difference Result 1869 states and 2665 transitions. [2021-12-18 04:42:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 04:42:02,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-12-18 04:42:02,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:42:02,503 INFO L225 Difference]: With dead ends: 1869 [2021-12-18 04:42:02,503 INFO L226 Difference]: Without dead ends: 1182 [2021-12-18 04:42:02,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-18 04:42:02,508 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 620 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 258 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-12-18 04:42:02,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 2078 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1087 Invalid, 4 Unknown, 0 Unchecked, 10.8s Time] [2021-12-18 04:42:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-12-18 04:42:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 757. [2021-12-18 04:42:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 591 states have (on average 1.365482233502538) internal successors, (807), 596 states have internal predecessors, (807), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-18 04:42:02,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1042 transitions. [2021-12-18 04:42:02,539 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1042 transitions. Word has length 83 [2021-12-18 04:42:02,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:42:02,542 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1042 transitions. [2021-12-18 04:42:02,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 04:42:02,542 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1042 transitions. [2021-12-18 04:42:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-18 04:42:02,544 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:42:02,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:42:02,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-18 04:42:02,545 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:42:02,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:42:02,545 INFO L85 PathProgramCache]: Analyzing trace with hash -247512640, now seen corresponding path program 1 times [2021-12-18 04:42:02,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:42:02,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250261369] [2021-12-18 04:42:02,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:02,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:42:02,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:02,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:42:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:02,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:42:02,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:02,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 04:42:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 04:42:02,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:42:02,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250261369] [2021-12-18 04:42:02,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250261369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 04:42:02,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234142332] [2021-12-18 04:42:02,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:02,700 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 04:42:02,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 04:42:02,701 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 04:42:02,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-18 04:42:03,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:03,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 2884 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-18 04:42:03,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 04:42:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 04:42:03,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 04:42:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-18 04:42:03,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234142332] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 04:42:03,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 04:42:03,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-18 04:42:03,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92658235] [2021-12-18 04:42:03,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 04:42:03,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 04:42:03,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:42:03,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 04:42:03,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-18 04:42:03,573 INFO L87 Difference]: Start difference. First operand 757 states and 1042 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 04:42:08,583 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:10,616 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:12,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:14,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:15,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:42:15,323 INFO L93 Difference]: Finished difference Result 3177 states and 4755 transitions. [2021-12-18 04:42:15,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-18 04:42:15,324 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-12-18 04:42:15,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:42:15,334 INFO L225 Difference]: With dead ends: 3177 [2021-12-18 04:42:15,334 INFO L226 Difference]: Without dead ends: 2436 [2021-12-18 04:42:15,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-18 04:42:15,339 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 2119 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 834 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-12-18 04:42:15,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2331 Valid, 2517 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1835 Invalid, 4 Unknown, 0 Unchecked, 11.5s Time] [2021-12-18 04:42:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-12-18 04:42:15,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 817. [2021-12-18 04:42:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 651 states have (on average 1.368663594470046) internal successors, (891), 656 states have internal predecessors, (891), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-18 04:42:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1126 transitions. [2021-12-18 04:42:15,383 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1126 transitions. Word has length 83 [2021-12-18 04:42:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:42:15,383 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1126 transitions. [2021-12-18 04:42:15,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 04:42:15,384 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1126 transitions. [2021-12-18 04:42:15,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-18 04:42:15,385 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:42:15,385 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:42:15,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-18 04:42:15,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 04:42:15,624 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:42:15,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:42:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash -2050556224, now seen corresponding path program 1 times [2021-12-18 04:42:15,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:42:15,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272232982] [2021-12-18 04:42:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:15,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:42:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:15,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:42:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:15,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:42:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:15,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 04:42:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:15,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-18 04:42:15,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:15,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-18 04:42:15,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:42:15,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272232982] [2021-12-18 04:42:15,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272232982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:42:15,892 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:42:15,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-18 04:42:15,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660088599] [2021-12-18 04:42:15,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:42:15,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-18 04:42:15,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:42:15,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-18 04:42:15,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-18 04:42:15,895 INFO L87 Difference]: Start difference. First operand 817 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 04:42:18,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:42:18,479 INFO L93 Difference]: Finished difference Result 1685 states and 2342 transitions. [2021-12-18 04:42:18,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-18 04:42:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 96 [2021-12-18 04:42:18,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:42:18,483 INFO L225 Difference]: With dead ends: 1685 [2021-12-18 04:42:18,483 INFO L226 Difference]: Without dead ends: 884 [2021-12-18 04:42:18,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-18 04:42:18,486 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 772 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-18 04:42:18,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 2286 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-18 04:42:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-12-18 04:42:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 798. [2021-12-18 04:42:18,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 638 states have (on average 1.365203761755486) internal successors, (871), 643 states have internal predecessors, (871), 112 states have call successors, (112), 48 states have call predecessors, (112), 47 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-12-18 04:42:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1094 transitions. [2021-12-18 04:42:18,512 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1094 transitions. Word has length 96 [2021-12-18 04:42:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:42:18,512 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1094 transitions. [2021-12-18 04:42:18,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-18 04:42:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1094 transitions. [2021-12-18 04:42:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-18 04:42:18,513 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:42:18,514 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:42:18,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-18 04:42:18,514 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:42:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:42:18,514 INFO L85 PathProgramCache]: Analyzing trace with hash 2089394007, now seen corresponding path program 2 times [2021-12-18 04:42:18,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:42:18,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046444294] [2021-12-18 04:42:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:18,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:42:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:18,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:42:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:42:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:18,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 04:42:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-18 04:42:18,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:42:18,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046444294] [2021-12-18 04:42:18,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046444294] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:42:18,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:42:18,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-18 04:42:18,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513858767] [2021-12-18 04:42:18,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:42:18,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 04:42:18,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:42:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 04:42:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-18 04:42:18,720 INFO L87 Difference]: Start difference. First operand 798 states and 1094 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 04:42:21,660 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 [] [2021-12-18 04:42:23,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:42:24,249 INFO L93 Difference]: Finished difference Result 1092 states and 1550 transitions. [2021-12-18 04:42:24,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-18 04:42:24,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 98 [2021-12-18 04:42:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:42:24,254 INFO L225 Difference]: With dead ends: 1092 [2021-12-18 04:42:24,254 INFO L226 Difference]: Without dead ends: 1089 [2021-12-18 04:42:24,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-18 04:42:24,255 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1021 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 325 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-18 04:42:24,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1097 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2021-12-18 04:42:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-12-18 04:42:24,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 802. [2021-12-18 04:42:24,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 641 states have (on average 1.3634945397815912) internal successors, (874), 646 states have internal predecessors, (874), 112 states have call successors, (112), 49 states have call predecessors, (112), 48 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-12-18 04:42:24,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1097 transitions. [2021-12-18 04:42:24,282 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1097 transitions. Word has length 98 [2021-12-18 04:42:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:42:24,283 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1097 transitions. [2021-12-18 04:42:24,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-18 04:42:24,283 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1097 transitions. [2021-12-18 04:42:24,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-18 04:42:24,284 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:42:24,284 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:42:24,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-18 04:42:24,285 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:42:24,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:42:24,285 INFO L85 PathProgramCache]: Analyzing trace with hash -853712003, now seen corresponding path program 1 times [2021-12-18 04:42:24,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:42:24,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155121351] [2021-12-18 04:42:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:24,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:42:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:42:24,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:42:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-18 04:42:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-18 04:42:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-18 04:42:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-18 04:42:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-18 04:42:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-18 04:42:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-18 04:42:24,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:42:24,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155121351] [2021-12-18 04:42:24,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155121351] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 04:42:24,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840205819] [2021-12-18 04:42:24,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:24,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 04:42:24,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 04:42:24,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 04:42:24,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-18 04:42:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:25,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 3750 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-18 04:42:25,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 04:42:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-18 04:42:25,373 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-18 04:42:25,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840205819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:42:25,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-18 04:42:25,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-18 04:42:25,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249064067] [2021-12-18 04:42:25,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:42:25,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-18 04:42:25,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:42:25,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-18 04:42:25,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-18 04:42:25,375 INFO L87 Difference]: Start difference. First operand 802 states and 1097 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-18 04:42:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:42:25,465 INFO L93 Difference]: Finished difference Result 2141 states and 2940 transitions. [2021-12-18 04:42:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-18 04:42:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-12-18 04:42:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:42:25,471 INFO L225 Difference]: With dead ends: 2141 [2021-12-18 04:42:25,471 INFO L226 Difference]: Without dead ends: 1355 [2021-12-18 04:42:25,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-18 04:42:25,474 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 510 mSDsluCounter, 3011 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 4189 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-18 04:42:25,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 4189 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-18 04:42:25,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-12-18 04:42:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 806. [2021-12-18 04:42:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 644 states have (on average 1.3618012422360248) internal successors, (877), 649 states have internal predecessors, (877), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2021-12-18 04:42:25,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1101 transitions. [2021-12-18 04:42:25,503 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1101 transitions. Word has length 116 [2021-12-18 04:42:25,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:42:25,503 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1101 transitions. [2021-12-18 04:42:25,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-18 04:42:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1101 transitions. [2021-12-18 04:42:25,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-18 04:42:25,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:42:25,505 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:42:25,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-18 04:42:25,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-18 04:42:25,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:42:25,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:42:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2124736263, now seen corresponding path program 1 times [2021-12-18 04:42:25,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:42:25,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478257019] [2021-12-18 04:42:25,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:25,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:42:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:25,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:42:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:25,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:42:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:25,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 04:42:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:25,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-18 04:42:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:25,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:25,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 04:42:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:25,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-18 04:42:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 04:42:26,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 04:42:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-18 04:42:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 04:42:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-18 04:42:26,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-18 04:42:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 04:42:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-18 04:42:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 04:42:26,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:42:26,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478257019] [2021-12-18 04:42:26,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478257019] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:42:26,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:42:26,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-18 04:42:26,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000519640] [2021-12-18 04:42:26,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:42:26,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-18 04:42:26,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:42:26,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-18 04:42:26,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-18 04:42:26,093 INFO L87 Difference]: Start difference. First operand 806 states and 1101 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-18 04:42:29,200 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 [] [2021-12-18 04:42:30,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:42:30,382 INFO L93 Difference]: Finished difference Result 1919 states and 2684 transitions. [2021-12-18 04:42:30,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-18 04:42:30,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 197 [2021-12-18 04:42:30,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:42:30,388 INFO L225 Difference]: With dead ends: 1919 [2021-12-18 04:42:30,388 INFO L226 Difference]: Without dead ends: 1129 [2021-12-18 04:42:30,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-18 04:42:30,391 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1070 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 551 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-18 04:42:30,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1112 Valid, 1565 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 1170 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-18 04:42:30,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-12-18 04:42:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 807. [2021-12-18 04:42:30,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 645 states have (on average 1.3612403100775194) internal successors, (878), 650 states have internal predecessors, (878), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2021-12-18 04:42:30,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1102 transitions. [2021-12-18 04:42:30,423 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1102 transitions. Word has length 197 [2021-12-18 04:42:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:42:30,423 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1102 transitions. [2021-12-18 04:42:30,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-18 04:42:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1102 transitions. [2021-12-18 04:42:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-12-18 04:42:30,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:42:30,426 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:42:30,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-18 04:42:30,426 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:42:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:42:30,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1201117839, now seen corresponding path program 1 times [2021-12-18 04:42:30,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:42:30,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773711405] [2021-12-18 04:42:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:30,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:42:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:42:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:42:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 04:42:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-18 04:42:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:30,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-18 04:42:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-18 04:42:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-18 04:42:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-18 04:42:30,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-18 04:42:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-18 04:42:30,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-18 04:42:30,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-18 04:42:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-18 04:42:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-12-18 04:42:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-12-18 04:42:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-18 04:42:30,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:42:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773711405] [2021-12-18 04:42:30,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773711405] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 04:42:30,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488279008] [2021-12-18 04:42:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:30,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 04:42:30,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 04:42:30,797 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 04:42:30,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-18 04:42:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:31,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 4758 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-18 04:42:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 04:42:32,074 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-18 04:42:32,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 04:42:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-18 04:42:32,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488279008] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 04:42:32,380 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 04:42:32,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2021-12-18 04:42:32,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657786575] [2021-12-18 04:42:32,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 04:42:32,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-18 04:42:32,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:42:32,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-18 04:42:32,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-12-18 04:42:32,382 INFO L87 Difference]: Start difference. First operand 807 states and 1102 transitions. Second operand has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-12-18 04:42:41,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:42:41,200 INFO L93 Difference]: Finished difference Result 5881 states and 8943 transitions. [2021-12-18 04:42:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-12-18 04:42:41,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 207 [2021-12-18 04:42:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:42:41,221 INFO L225 Difference]: With dead ends: 5881 [2021-12-18 04:42:41,221 INFO L226 Difference]: Without dead ends: 5090 [2021-12-18 04:42:41,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=932, Invalid=3100, Unknown=0, NotChecked=0, Total=4032 [2021-12-18 04:42:41,226 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 7508 mSDsluCounter, 4236 mSDsCounter, 0 mSdLazyCounter, 6281 mSolverCounterSat, 3532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7879 SdHoareTripleChecker+Valid, 4991 SdHoareTripleChecker+Invalid, 9813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3532 IncrementalHoareTripleChecker+Valid, 6281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-18 04:42:41,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7879 Valid, 4991 Invalid, 9813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3532 Valid, 6281 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2021-12-18 04:42:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2021-12-18 04:42:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 934. [2021-12-18 04:42:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 771 states have (on average 1.364461738002594) internal successors, (1052), 776 states have internal predecessors, (1052), 113 states have call successors, (113), 49 states have call predecessors, (113), 49 states have return successors, (113), 113 states have call predecessors, (113), 112 states have call successors, (113) [2021-12-18 04:42:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1278 transitions. [2021-12-18 04:42:41,304 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1278 transitions. Word has length 207 [2021-12-18 04:42:41,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:42:41,304 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1278 transitions. [2021-12-18 04:42:41,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-12-18 04:42:41,305 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1278 transitions. [2021-12-18 04:42:41,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-12-18 04:42:41,307 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:42:41,307 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:42:41,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-18 04:42:41,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 04:42:41,534 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:42:41,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:42:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1247223031, now seen corresponding path program 2 times [2021-12-18 04:42:41,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:42:41,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319406349] [2021-12-18 04:42:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:42:41,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:42:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:42:42,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:42:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 04:42:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-18 04:42:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:42,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-12-18 04:42:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-12-18 04:42:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-18 04:42:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-18 04:42:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:42,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-18 04:42:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-12-18 04:42:42,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-12-18 04:42:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-12-18 04:42:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-12-18 04:42:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-12-18 04:42:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-12-18 04:42:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-12-18 04:42:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:42:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:42:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 04:42:42,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:42:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319406349] [2021-12-18 04:42:42,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319406349] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-18 04:42:42,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814634976] [2021-12-18 04:42:42,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-18 04:42:42,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 04:42:42,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-18 04:42:42,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-18 04:42:42,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-18 04:42:43,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-18 04:42:43,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-18 04:42:43,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 4982 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-18 04:42:43,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-18 04:42:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 4 proven. 235 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-18 04:42:43,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-18 04:42:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-18 04:42:43,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814634976] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-18 04:42:43,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-18 04:42:43,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 23 [2021-12-18 04:42:43,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437460646] [2021-12-18 04:42:43,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-18 04:42:43,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-18 04:42:43,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:42:43,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-18 04:42:43,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-12-18 04:42:43,785 INFO L87 Difference]: Start difference. First operand 934 states and 1278 transitions. Second operand has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-12-18 04:42:53,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:42:55,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-18 04:43:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:43:00,439 INFO L93 Difference]: Finished difference Result 8510 states and 13008 transitions. [2021-12-18 04:43:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-18 04:43:00,440 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 247 [2021-12-18 04:43:00,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:43:00,467 INFO L225 Difference]: With dead ends: 8510 [2021-12-18 04:43:00,468 INFO L226 Difference]: Without dead ends: 7592 [2021-12-18 04:43:00,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=980, Invalid=2442, Unknown=0, NotChecked=0, Total=3422 [2021-12-18 04:43:00,473 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 11120 mSDsluCounter, 4899 mSDsCounter, 0 mSdLazyCounter, 7630 mSolverCounterSat, 4797 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11690 SdHoareTripleChecker+Valid, 5807 SdHoareTripleChecker+Invalid, 12428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4797 IncrementalHoareTripleChecker+Valid, 7630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-12-18 04:43:00,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11690 Valid, 5807 Invalid, 12428 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4797 Valid, 7630 Invalid, 1 Unknown, 0 Unchecked, 15.2s Time] [2021-12-18 04:43:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2021-12-18 04:43:00,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 1054. [2021-12-18 04:43:00,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 891 states have (on average 1.3692480359147026) internal successors, (1220), 896 states have internal predecessors, (1220), 113 states have call successors, (113), 49 states have call predecessors, (113), 49 states have return successors, (113), 113 states have call predecessors, (113), 112 states have call successors, (113) [2021-12-18 04:43:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1446 transitions. [2021-12-18 04:43:00,588 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1446 transitions. Word has length 247 [2021-12-18 04:43:00,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:43:00,589 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1446 transitions. [2021-12-18 04:43:00,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-12-18 04:43:00,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1446 transitions. [2021-12-18 04:43:00,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-12-18 04:43:00,592 INFO L506 BasicCegarLoop]: Found error trace [2021-12-18 04:43:00,592 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-18 04:43:00,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-18 04:43:00,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-18 04:43:00,816 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-18 04:43:00,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-18 04:43:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash 956437033, now seen corresponding path program 3 times [2021-12-18 04:43:00,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-18 04:43:00,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709444175] [2021-12-18 04:43:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-18 04:43:00,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-18 04:43:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-18 04:43:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-18 04:43:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-18 04:43:01,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-12-18 04:43:01,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:43:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-12-18 04:43:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-12-18 04:43:01,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-12-18 04:43:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-12-18 04:43:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:43:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-12-18 04:43:01,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-12-18 04:43:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-12-18 04:43:01,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-12-18 04:43:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-12-18 04:43:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-12-18 04:43:01,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2021-12-18 04:43:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2021-12-18 04:43:01,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-18 04:43:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-18 04:43:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2021-12-18 04:43:01,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-18 04:43:01,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709444175] [2021-12-18 04:43:01,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709444175] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-18 04:43:01,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-18 04:43:01,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-18 04:43:01,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38083872] [2021-12-18 04:43:01,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-18 04:43:01,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-18 04:43:01,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-18 04:43:01,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-18 04:43:01,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-18 04:43:01,355 INFO L87 Difference]: Start difference. First operand 1054 states and 1446 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-18 04:43:01,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-18 04:43:01,885 INFO L93 Difference]: Finished difference Result 2036 states and 2856 transitions. [2021-12-18 04:43:01,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-18 04:43:01,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 277 [2021-12-18 04:43:01,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-18 04:43:01,887 INFO L225 Difference]: With dead ends: 2036 [2021-12-18 04:43:01,887 INFO L226 Difference]: Without dead ends: 0 [2021-12-18 04:43:01,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-12-18 04:43:01,891 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 272 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-18 04:43:01,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 740 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-18 04:43:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-18 04:43:01,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-18 04:43:01,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-18 04:43:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-18 04:43:01,893 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 277 [2021-12-18 04:43:01,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-18 04:43:01,893 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-18 04:43:01,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-12-18 04:43:01,893 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-18 04:43:01,893 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-18 04:43:01,895 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-18 04:43:01,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-18 04:43:01,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-18 04:43:31,515 WARN L227 SmtUtils]: Spent 29.47s on a formula simplification. DAG size of input: 125 DAG size of output: 123 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-18 04:44:40,213 WARN L227 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-18 04:44:50,329 WARN L227 SmtUtils]: Spent 10.08s on a formula simplification. DAG size of input: 690 DAG size of output: 686 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-18 04:46:00,041 WARN L227 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-12-18 04:47:08,698 WARN L227 SmtUtils]: Spent 1.14m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15