./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.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 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:40:32,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:40:32,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:40:32,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:40:32,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:40:32,133 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:40:32,135 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:40:32,138 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:40:32,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:40:32,145 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:40:32,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:40:32,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:40:32,147 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:40:32,149 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:40:32,150 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:40:32,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:40:32,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:40:32,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:40:32,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:40:32,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:40:32,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:40:32,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:40:32,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:40:32,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:40:32,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:40:32,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:40:32,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:40:32,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:40:32,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:40:32,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:40:32,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:40:32,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:40:32,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:40:32,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:40:32,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:40:32,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:40:32,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:40:32,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:40:32,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:40:32,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:40:32,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:40:32,178 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:40:32,196 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:40:32,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:40:32,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:40:32,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:40:32,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:40:32,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:40:32,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:40:32,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:40:32,205 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:40:32,205 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:40:32,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:40:32,206 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:40:32,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:40:32,207 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:40:32,207 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:40:32,207 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:40:32,207 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:40:32,207 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:40:32,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:40:32,208 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:40:32,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:40:32,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:40:32,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:40:32,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:40:32,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:40:32,209 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:40:32,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:40:32,209 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:40:32,209 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:40:32,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:40:32,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:40:32,209 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d55f274509719e259063891bf7f51d6ae3645569d8243a0d7434c1b24ad753 [2021-12-22 14:40:32,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:40:32,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:40:32,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:40:32,422 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:40:32,422 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:40:32,423 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-22 14:40:32,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e87f4195/2a85ec06ea564f729e65cfe7b6cab951/FLAG6cd906be6 [2021-12-22 14:40:33,036 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:40:33,037 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-22 14:40:33,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e87f4195/2a85ec06ea564f729e65cfe7b6cab951/FLAG6cd906be6 [2021-12-22 14:40:33,505 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6e87f4195/2a85ec06ea564f729e65cfe7b6cab951 [2021-12-22 14:40:33,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:40:33,510 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:40:33,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:40:33,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:40:33,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:40:33,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:40:33" (1/1) ... [2021-12-22 14:40:33,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fd2a4f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:33, skipping insertion in model container [2021-12-22 14:40:33,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:40:33" (1/1) ... [2021-12-22 14:40:33,521 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:40:33,598 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:40:34,219 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-12-22 14:40:34,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:40:34,655 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:40:34,790 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[206925,206938] [2021-12-22 14:40:34,899 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:40:34,975 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:40:34,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34 WrapperNode [2021-12-22 14:40:34,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:40:34,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:40:34,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:40:34,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:40:34,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,120 INFO L137 Inliner]: procedures = 157, calls = 1181, calls flagged for inlining = 63, calls inlined = 51, statements flattened = 2337 [2021-12-22 14:40:35,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:40:35,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:40:35,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:40:35,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:40:35,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,185 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:40:35,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:40:35,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:40:35,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:40:35,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (1/1) ... [2021-12-22 14:40:35,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:40:35,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:40:35,270 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 14:40:35,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 14:40:35,301 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-12-22 14:40:35,301 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-12-22 14:40:35,301 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_dev_alloc_skb_14 [2021-12-22 14:40:35,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_dev_alloc_skb_14 [2021-12-22 14:40:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:40:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-12-22 14:40:35,302 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-12-22 14:40:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-12-22 14:40:35,302 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-12-22 14:40:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-22 14:40:35,302 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-22 14:40:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:40:35,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:40:35,303 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-22 14:40:35,303 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-22 14:40:35,303 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 14:40:35,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 14:40:35,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:40:35,303 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-12-22 14:40:35,303 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-12-22 14:40:35,303 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-12-22 14:40:35,303 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-12-22 14:40:35,304 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_disconnect [2021-12-22 14:40:35,304 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_disconnect [2021-12-22 14:40:35,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:40:35,304 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:40:35,304 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-22 14:40:35,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-22 14:40:35,304 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:40:35,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:40:35,304 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-22 14:40:35,305 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-22 14:40:35,305 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_get_priv [2021-12-22 14:40:35,305 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_get_priv [2021-12-22 14:40:35,305 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_submit_rx_urb [2021-12-22 14:40:35,305 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_submit_rx_urb [2021-12-22 14:40:35,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-12-22 14:40:35,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-12-22 14:40:35,306 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 14:40:35,306 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 14:40:35,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:40:35,306 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-12-22 14:40:35,306 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-12-22 14:40:35,306 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:40:35,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:40:35,306 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-12-22 14:40:35,307 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-12-22 14:40:35,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-22 14:40:35,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-22 14:40:35,307 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-12-22 14:40:35,307 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-12-22 14:40:35,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-22 14:40:35,308 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-22 14:40:35,308 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:40:35,308 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:40:35,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:40:35,309 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-12-22 14:40:35,309 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-12-22 14:40:35,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:40:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-12-22 14:40:35,310 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-12-22 14:40:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:40:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:40:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_cmd_event_complete [2021-12-22 14:40:35,310 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_cmd_event_complete [2021-12-22 14:40:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:40:35,310 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-12-22 14:40:35,311 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-12-22 14:40:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2021-12-22 14:40:35,311 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2021-12-22 14:40:35,311 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-22 14:40:35,311 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-22 14:40:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:40:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:40:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-22 14:40:35,312 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-22 14:40:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-12-22 14:40:35,312 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-12-22 14:40:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:40:35,312 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_resume [2021-12-22 14:40:35,312 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_resume [2021-12-22 14:40:35,313 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-22 14:40:35,313 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-22 14:40:35,313 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-22 14:40:35,313 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-22 14:40:35,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:40:35,313 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-12-22 14:40:35,313 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-22 14:40:35,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-22 14:40:35,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:40:35,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:40:35,314 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-12-22 14:40:35,314 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-12-22 14:40:35,738 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:40:35,741 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:40:35,845 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 14:40:39,208 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:40:39,227 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:40:39,227 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 14:40:39,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:40:39 BoogieIcfgContainer [2021-12-22 14:40:39,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:40:39,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:40:39,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:40:39,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:40:39,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:40:33" (1/3) ... [2021-12-22 14:40:39,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71fb70b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:40:39, skipping insertion in model container [2021-12-22 14:40:39,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:40:34" (2/3) ... [2021-12-22 14:40:39,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71fb70b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:40:39, skipping insertion in model container [2021-12-22 14:40:39,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:40:39" (3/3) ... [2021-12-22 14:40:39,237 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-12-22 14:40:39,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:40:39,241 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:40:39,284 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:40:39,290 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 14:40:39,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:40:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 678 states, 502 states have (on average 1.3764940239043826) internal successors, (691), 515 states have internal predecessors, (691), 137 states have call successors, (137), 38 states have call predecessors, (137), 37 states have return successors, (133), 130 states have call predecessors, (133), 133 states have call successors, (133) [2021-12-22 14:40:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 14:40:39,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:40:39,320 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:40:39,321 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:40:39,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:40:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1998328016, now seen corresponding path program 1 times [2021-12-22 14:40:39,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:40:39,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479433303] [2021-12-22 14:40:39,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:40:39,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:40:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:39,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:40:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:39,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:40:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:40:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:39,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:40:39,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 14:40:39,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:40:39,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479433303] [2021-12-22 14:40:39,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479433303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:40:39,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:40:39,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:40:39,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800322254] [2021-12-22 14:40:39,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:40:39,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:40:39,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:40:39,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:40:39,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:40:39,843 INFO L87 Difference]: Start difference. First operand has 678 states, 502 states have (on average 1.3764940239043826) internal successors, (691), 515 states have internal predecessors, (691), 137 states have call successors, (137), 38 states have call predecessors, (137), 37 states have return successors, (133), 130 states have call predecessors, (133), 133 states have call successors, (133) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 14:40:42,095 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 [] [2021-12-22 14:40:44,114 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 [] [2021-12-22 14:40:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:40:46,517 INFO L93 Difference]: Finished difference Result 2121 states and 3115 transitions. [2021-12-22 14:40:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:40:46,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 45 [2021-12-22 14:40:46,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:40:46,540 INFO L225 Difference]: With dead ends: 2121 [2021-12-22 14:40:46,540 INFO L226 Difference]: Without dead ends: 1432 [2021-12-22 14:40:46,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:40:46,552 INFO L933 BasicCegarLoop]: 1043 mSDtfsCounter, 1384 mSDsluCounter, 1779 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 687 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1493 SdHoareTripleChecker+Valid, 2822 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:40:46,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1493 Valid, 2822 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 957 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-12-22 14:40:46,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1432 states. [2021-12-22 14:40:46,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1432 to 1286. [2021-12-22 14:40:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 957 states have (on average 1.3657262277951934) internal successors, (1307), 971 states have internal predecessors, (1307), 256 states have call successors, (256), 73 states have call predecessors, (256), 72 states have return successors, (255), 249 states have call predecessors, (255), 255 states have call successors, (255) [2021-12-22 14:40:46,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1818 transitions. [2021-12-22 14:40:46,701 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1818 transitions. Word has length 45 [2021-12-22 14:40:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:40:46,702 INFO L470 AbstractCegarLoop]: Abstraction has 1286 states and 1818 transitions. [2021-12-22 14:40:46,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 14:40:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1818 transitions. [2021-12-22 14:40:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-22 14:40:46,710 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:40:46,710 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:40:46,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:40:46,711 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:40:46,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:40:46,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1828543170, now seen corresponding path program 1 times [2021-12-22 14:40:46,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:40:46,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503544714] [2021-12-22 14:40:46,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:40:46,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:40:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:46,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:40:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:46,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:40:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:46,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:40:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:46,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:40:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:46,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 14:40:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:46,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:40:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-22 14:40:46,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:40:46,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503544714] [2021-12-22 14:40:46,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503544714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:40:46,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:40:46,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:40:46,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543309462] [2021-12-22 14:40:46,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:40:46,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:40:46,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:40:47,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:40:47,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:40:47,000 INFO L87 Difference]: Start difference. First operand 1286 states and 1818 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 14:40:49,171 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 [] [2021-12-22 14:40:51,184 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 [] [2021-12-22 14:40:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:40:53,655 INFO L93 Difference]: Finished difference Result 4123 states and 5934 transitions. [2021-12-22 14:40:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:40:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 63 [2021-12-22 14:40:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:40:53,674 INFO L225 Difference]: With dead ends: 4123 [2021-12-22 14:40:53,674 INFO L226 Difference]: Without dead ends: 2839 [2021-12-22 14:40:53,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:40:53,680 INFO L933 BasicCegarLoop]: 1096 mSDtfsCounter, 1367 mSDsluCounter, 3901 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 663 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 4997 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-12-22 14:40:53,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1474 Valid, 4997 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [663 Valid, 1326 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-12-22 14:40:53,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2839 states. [2021-12-22 14:40:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2839 to 2591. [2021-12-22 14:40:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 1927 states have (on average 1.3642968344577062) internal successors, (2629), 1963 states have internal predecessors, (2629), 507 states have call successors, (507), 145 states have call predecessors, (507), 156 states have return successors, (561), 498 states have call predecessors, (561), 506 states have call successors, (561) [2021-12-22 14:40:53,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3697 transitions. [2021-12-22 14:40:53,774 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3697 transitions. Word has length 63 [2021-12-22 14:40:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:40:53,775 INFO L470 AbstractCegarLoop]: Abstraction has 2591 states and 3697 transitions. [2021-12-22 14:40:53,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-22 14:40:53,775 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3697 transitions. [2021-12-22 14:40:53,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-22 14:40:53,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:40:53,783 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-22 14:40:53,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:40:53,784 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:40:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:40:53,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1080085425, now seen corresponding path program 1 times [2021-12-22 14:40:53,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:40:53,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621393202] [2021-12-22 14:40:53,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:40:53,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:40:53,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:53,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:40:53,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:53,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:40:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:53,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:40:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:53,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:40:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:53,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-22 14:40:53,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:53,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:40:53,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:53,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:40:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:54,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:40:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:40:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:54,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-22 14:40:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:54,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 14:40:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:40:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-22 14:40:54,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:40:54,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621393202] [2021-12-22 14:40:54,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621393202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:40:54,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:40:54,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:40:54,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270607144] [2021-12-22 14:40:54,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:40:54,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:40:54,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:40:54,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:40:54,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:40:54,051 INFO L87 Difference]: Start difference. First operand 2591 states and 3697 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 14:40:56,211 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 [] [2021-12-22 14:40:58,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:41:00,254 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:41:02,807 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:41:04,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:41:06,848 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 [] [2021-12-22 14:41:09,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:41:09,083 INFO L93 Difference]: Finished difference Result 7632 states and 10965 transitions. [2021-12-22 14:41:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:41:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 113 [2021-12-22 14:41:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:41:09,108 INFO L225 Difference]: With dead ends: 7632 [2021-12-22 14:41:09,108 INFO L226 Difference]: Without dead ends: 5053 [2021-12-22 14:41:09,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:41:09,116 INFO L933 BasicCegarLoop]: 1036 mSDtfsCounter, 1308 mSDsluCounter, 2361 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 883 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1409 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 883 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-12-22 14:41:09,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1409 Valid, 3397 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [883 Valid, 1323 Invalid, 6 Unknown, 0 Unchecked, 14.8s Time] [2021-12-22 14:41:09,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5053 states. [2021-12-22 14:41:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5053 to 4275. [2021-12-22 14:41:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4275 states, 3162 states have (on average 1.3488298545224542) internal successors, (4265), 3224 states have internal predecessors, (4265), 829 states have call successors, (829), 262 states have call predecessors, (829), 283 states have return successors, (918), 816 states have call predecessors, (918), 828 states have call successors, (918) [2021-12-22 14:41:09,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4275 states to 4275 states and 6012 transitions. [2021-12-22 14:41:09,262 INFO L78 Accepts]: Start accepts. Automaton has 4275 states and 6012 transitions. Word has length 113 [2021-12-22 14:41:09,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:41:09,263 INFO L470 AbstractCegarLoop]: Abstraction has 4275 states and 6012 transitions. [2021-12-22 14:41:09,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-12-22 14:41:09,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4275 states and 6012 transitions. [2021-12-22 14:41:09,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-12-22 14:41:09,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:41:09,273 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-12-22 14:41:09,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:41:09,274 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:41:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:41:09,274 INFO L85 PathProgramCache]: Analyzing trace with hash 265725666, now seen corresponding path program 1 times [2021-12-22 14:41:09,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:41:09,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388050538] [2021-12-22 14:41:09,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:41:09,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:41:09,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:41:09,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:41:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:41:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:41:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-12-22 14:41:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 14:41:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 14:41:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 14:41:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-22 14:41:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-12-22 14:41:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 14:41:09,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-22 14:41:09,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:41:09,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388050538] [2021-12-22 14:41:09,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388050538] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:41:09,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:41:09,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:41:09,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612430820] [2021-12-22 14:41:09,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:41:09,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:41:09,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:41:09,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:41:09,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:41:09,557 INFO L87 Difference]: Start difference. First operand 4275 states and 6012 transitions. Second operand has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-22 14:41:11,656 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 [] [2021-12-22 14:41:13,676 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:41:15,948 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:41:17,983 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 [] [2021-12-22 14:41:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:41:20,297 INFO L93 Difference]: Finished difference Result 10577 states and 14962 transitions. [2021-12-22 14:41:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 14:41:20,298 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 130 [2021-12-22 14:41:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:41:20,358 INFO L225 Difference]: With dead ends: 10577 [2021-12-22 14:41:20,358 INFO L226 Difference]: Without dead ends: 6318 [2021-12-22 14:41:20,368 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 14:41:20,369 INFO L933 BasicCegarLoop]: 1217 mSDtfsCounter, 826 mSDsluCounter, 3159 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 417 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 4376 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-12-22 14:41:20,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 4376 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 1212 Invalid, 4 Unknown, 0 Unchecked, 10.5s Time] [2021-12-22 14:41:20,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6318 states. [2021-12-22 14:41:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6318 to 5704. [2021-12-22 14:41:20,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5704 states, 4250 states have (on average 1.3538823529411765) internal successors, (5754), 4336 states have internal predecessors, (5754), 1066 states have call successors, (1066), 358 states have call predecessors, (1066), 387 states have return successors, (1183), 1041 states have call predecessors, (1183), 1065 states have call successors, (1183) [2021-12-22 14:41:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5704 states to 5704 states and 8003 transitions. [2021-12-22 14:41:20,524 INFO L78 Accepts]: Start accepts. Automaton has 5704 states and 8003 transitions. Word has length 130 [2021-12-22 14:41:20,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:41:20,525 INFO L470 AbstractCegarLoop]: Abstraction has 5704 states and 8003 transitions. [2021-12-22 14:41:20,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.142857142857142) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-22 14:41:20,527 INFO L276 IsEmpty]: Start isEmpty. Operand 5704 states and 8003 transitions. [2021-12-22 14:41:20,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-22 14:41:20,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:41:20,536 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 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] [2021-12-22 14:41:20,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:41:20,536 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:41:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:41:20,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1355234686, now seen corresponding path program 1 times [2021-12-22 14:41:20,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:41:20,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201023528] [2021-12-22 14:41:20,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:41:20,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:41:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:41:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:41:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:41:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:41:20,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 14:41:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:41:20,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-12-22 14:41:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 14:41:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 14:41:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 14:41:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:20,893 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-12-22 14:41:20,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:41:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201023528] [2021-12-22 14:41:20,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201023528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:41:20,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:41:20,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 14:41:20,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757976985] [2021-12-22 14:41:20,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:41:20,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:41:20,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:41:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:41:20,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:41:20,897 INFO L87 Difference]: Start difference. First operand 5704 states and 8003 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 14:41:23,008 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 [] [2021-12-22 14:41:25,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:41:27,064 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:41:29,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:41:29,076 INFO L93 Difference]: Finished difference Result 9240 states and 13053 transitions. [2021-12-22 14:41:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 14:41:29,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 138 [2021-12-22 14:41:29,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:41:29,090 INFO L225 Difference]: With dead ends: 9240 [2021-12-22 14:41:29,090 INFO L226 Difference]: Without dead ends: 3553 [2021-12-22 14:41:29,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:41:29,103 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 488 mSDsluCounter, 3889 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 519 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 4786 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-12-22 14:41:29,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 4786 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 1311 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2021-12-22 14:41:29,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3553 states. [2021-12-22 14:41:29,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3553 to 2926. [2021-12-22 14:41:29,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2926 states, 2183 states have (on average 1.3518094365551994) internal successors, (2951), 2226 states have internal predecessors, (2951), 540 states have call successors, (540), 188 states have call predecessors, (540), 202 states have return successors, (598), 527 states have call predecessors, (598), 539 states have call successors, (598) [2021-12-22 14:41:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2926 states to 2926 states and 4089 transitions. [2021-12-22 14:41:29,190 INFO L78 Accepts]: Start accepts. Automaton has 2926 states and 4089 transitions. Word has length 138 [2021-12-22 14:41:29,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:41:29,191 INFO L470 AbstractCegarLoop]: Abstraction has 2926 states and 4089 transitions. [2021-12-22 14:41:29,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 5 states have internal predecessors, (92), 2 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-12-22 14:41:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2926 states and 4089 transitions. [2021-12-22 14:41:29,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-12-22 14:41:29,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:41:29,197 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:41:29,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:41:29,198 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:41:29,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:41:29,199 INFO L85 PathProgramCache]: Analyzing trace with hash 874391015, now seen corresponding path program 1 times [2021-12-22 14:41:29,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:41:29,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541013517] [2021-12-22 14:41:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:41:29,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:41:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:41:29,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:41:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:41:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:41:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 14:41:29,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:41:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 14:41:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 14:41:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 14:41:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 14:41:29,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:29,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 14:41:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-22 14:41:29,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:41:29,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541013517] [2021-12-22 14:41:29,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541013517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:41:29,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:41:29,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 14:41:29,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172177944] [2021-12-22 14:41:29,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:41:29,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:41:29,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:41:29,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:41:29,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:41:29,589 INFO L87 Difference]: Start difference. First operand 2926 states and 4089 transitions. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-22 14:41:31,709 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 [] [2021-12-22 14:41:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:41:33,984 INFO L93 Difference]: Finished difference Result 6300 states and 9026 transitions. [2021-12-22 14:41:33,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:41:33,985 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) Word has length 144 [2021-12-22 14:41:33,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:41:33,998 INFO L225 Difference]: With dead ends: 6300 [2021-12-22 14:41:33,999 INFO L226 Difference]: Without dead ends: 3416 [2021-12-22 14:41:34,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:41:34,007 INFO L933 BasicCegarLoop]: 925 mSDtfsCounter, 212 mSDsluCounter, 4022 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 180 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 4947 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:41:34,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 4947 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1354 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2021-12-22 14:41:34,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2021-12-22 14:41:34,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 3050. [2021-12-22 14:41:34,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3050 states, 2256 states have (on average 1.3457446808510638) internal successors, (3036), 2308 states have internal predecessors, (3036), 578 states have call successors, (578), 188 states have call predecessors, (578), 215 states have return successors, (671), 569 states have call predecessors, (671), 577 states have call successors, (671) [2021-12-22 14:41:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 4285 transitions. [2021-12-22 14:41:34,107 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 4285 transitions. Word has length 144 [2021-12-22 14:41:34,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:41:34,108 INFO L470 AbstractCegarLoop]: Abstraction has 3050 states and 4285 transitions. [2021-12-22 14:41:34,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 4 states have internal predecessors, (96), 2 states have call successors, (15), 6 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 1 states have call successors, (14) [2021-12-22 14:41:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 4285 transitions. [2021-12-22 14:41:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-22 14:41:34,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:41:34,113 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:41:34,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 14:41:34,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:41:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:41:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1123820233, now seen corresponding path program 1 times [2021-12-22 14:41:34,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:41:34,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579239351] [2021-12-22 14:41:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:41:34,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:41:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:41:34,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:41:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:41:34,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:41:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 14:41:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:41:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 14:41:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 14:41:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 14:41:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 14:41:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-22 14:41:34,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:41:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:34,533 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-22 14:41:34,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:41:34,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579239351] [2021-12-22 14:41:34,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579239351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:41:34,534 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:41:34,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-22 14:41:34,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095393772] [2021-12-22 14:41:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:41:34,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 14:41:34,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:41:34,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 14:41:34,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-22 14:41:34,536 INFO L87 Difference]: Start difference. First operand 3050 states and 4285 transitions. Second operand has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (16), 6 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 14:41:36,681 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 [] [2021-12-22 14:41:38,706 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 [] [2021-12-22 14:41:40,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:41:40,917 INFO L93 Difference]: Finished difference Result 6426 states and 9090 transitions. [2021-12-22 14:41:40,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 14:41:40,918 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (16), 6 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) Word has length 151 [2021-12-22 14:41:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:41:40,939 INFO L225 Difference]: With dead ends: 6426 [2021-12-22 14:41:40,940 INFO L226 Difference]: Without dead ends: 3418 [2021-12-22 14:41:40,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-12-22 14:41:40,948 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 319 mSDsluCounter, 5685 mSDsCounter, 0 mSdLazyCounter, 1593 mSolverCounterSat, 333 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 6606 SdHoareTripleChecker+Invalid, 1928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 1593 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:41:40,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 6606 Invalid, 1928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 1593 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-12-22 14:41:40,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-12-22 14:41:41,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3074. [2021-12-22 14:41:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3074 states, 2274 states have (on average 1.3430079155672823) internal successors, (3054), 2324 states have internal predecessors, (3054), 578 states have call successors, (578), 188 states have call predecessors, (578), 221 states have return successors, (694), 577 states have call predecessors, (694), 577 states have call successors, (694) [2021-12-22 14:41:41,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3074 states to 3074 states and 4326 transitions. [2021-12-22 14:41:41,054 INFO L78 Accepts]: Start accepts. Automaton has 3074 states and 4326 transitions. Word has length 151 [2021-12-22 14:41:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:41:41,056 INFO L470 AbstractCegarLoop]: Abstraction has 3074 states and 4326 transitions. [2021-12-22 14:41:41,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.090909090909092) internal successors, (100), 5 states have internal predecessors, (100), 2 states have call successors, (16), 6 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 2 states have call successors, (15) [2021-12-22 14:41:41,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3074 states and 4326 transitions. [2021-12-22 14:41:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-22 14:41:41,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:41:41,064 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:41:41,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 14:41:41,064 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:41:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:41:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash -52186779, now seen corresponding path program 1 times [2021-12-22 14:41:41,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:41:41,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022499603] [2021-12-22 14:41:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:41:41,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:41:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:41:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 14:41:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-22 14:41:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 14:41:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 14:41:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-22 14:41:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-22 14:41:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-22 14:41:41,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 14:41:41,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-12-22 14:41:41,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:41:41,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-12-22 14:41:41,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:41,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:41:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-22 14:41:41,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:41:41,466 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-22 14:41:41,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:41:41,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022499603] [2021-12-22 14:41:41,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022499603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:41:41,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:41:41,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 14:41:41,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646951373] [2021-12-22 14:41:41,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:41:41,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 14:41:41,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:41:41,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 14:41:41,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:41:41,468 INFO L87 Difference]: Start difference. First operand 3074 states and 4326 transitions. Second operand has 8 states, 8 states have (on average 12.125) internal successors, (97), 4 states have internal predecessors, (97), 2 states have call successors, (17), 6 states have call predecessors, (17), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16)