./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 14:42:53,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 14:42:53,994 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 14:42:54,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 14:42:54,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 14:42:54,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 14:42:54,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 14:42:54,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 14:42:54,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 14:42:54,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 14:42:54,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 14:42:54,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 14:42:54,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 14:42:54,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 14:42:54,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 14:42:54,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 14:42:54,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 14:42:54,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 14:42:54,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 14:42:54,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 14:42:54,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 14:42:54,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 14:42:54,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 14:42:54,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 14:42:54,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 14:42:54,067 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 14:42:54,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 14:42:54,069 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 14:42:54,069 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 14:42:54,070 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 14:42:54,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 14:42:54,071 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 14:42:54,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 14:42:54,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 14:42:54,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 14:42:54,074 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 14:42:54,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 14:42:54,075 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 14:42:54,075 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 14:42:54,076 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 14:42:54,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 14:42:54,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-22 14:42:54,103 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 14:42:54,104 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 14:42:54,104 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 14:42:54,105 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 14:42:54,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 14:42:54,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 14:42:54,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 14:42:54,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 14:42:54,106 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 14:42:54,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 14:42:54,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 14:42:54,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 14:42:54,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 14:42:54,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 14:42:54,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 14:42:54,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 14:42:54,108 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 14:42:54,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 14:42:54,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 14:42:54,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 14:42:54,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 14:42:54,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:42:54,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 14:42:54,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 14:42:54,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 14:42:54,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 14:42:54,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 14:42:54,110 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 14:42:54,110 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 14:42:54,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 14:42:54,110 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 14:42:54,111 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2021-12-22 14:42:54,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 14:42:54,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 14:42:54,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 14:42:54,337 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 14:42:54,338 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 14:42:54,339 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-12-22 14:42:54,381 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe628f37a/4139d1d513f34352aba61185b1418e9c/FLAG6656e8409 [2021-12-22 14:42:55,051 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 14:42:55,052 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-12-22 14:42:55,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe628f37a/4139d1d513f34352aba61185b1418e9c/FLAG6656e8409 [2021-12-22 14:42:55,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe628f37a/4139d1d513f34352aba61185b1418e9c [2021-12-22 14:42:55,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 14:42:55,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 14:42:55,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 14:42:55,211 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 14:42:55,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 14:42:55,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:42:55" (1/1) ... [2021-12-22 14:42:55,214 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c9039b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:55, skipping insertion in model container [2021-12-22 14:42:55,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 02:42:55" (1/1) ... [2021-12-22 14:42:55,220 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 14:42:55,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 14:42:55,756 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2021-12-22 14:42:55,756 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2021-12-22 14:42:56,018 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2021-12-22 14:42:56,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:42:56,813 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 14:42:56,946 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2021-12-22 14:42:56,948 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2021-12-22 14:42:56,953 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2021-12-22 14:42:57,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 14:42:57,190 INFO L208 MainTranslator]: Completed translation [2021-12-22 14:42:57,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57 WrapperNode [2021-12-22 14:42:57,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 14:42:57,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 14:42:57,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 14:42:57,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 14:42:57,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,267 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,343 INFO L137 Inliner]: procedures = 202, calls = 1968, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2095 [2021-12-22 14:42:57,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 14:42:57,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 14:42:57,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 14:42:57,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 14:42:57,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,492 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 14:42:57,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 14:42:57,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 14:42:57,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 14:42:57,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (1/1) ... [2021-12-22 14:42:57,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 14:42:57,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:42:57,553 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 14:42:57,594 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 14:42:57,621 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-12-22 14:42:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-12-22 14:42:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-22 14:42:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-22 14:42:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-22 14:42:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-22 14:42:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-22 14:42:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-22 14:42:57,622 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-12-22 14:42:57,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-12-22 14:42:57,623 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-22 14:42:57,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-22 14:42:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-22 14:42:57,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-22 14:42:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-22 14:42:57,624 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-22 14:42:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2021-12-22 14:42:57,625 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2021-12-22 14:42:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-22 14:42:57,625 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-22 14:42:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-22 14:42:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-22 14:42:57,625 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-12-22 14:42:57,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-12-22 14:42:57,626 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-12-22 14:42:57,626 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-12-22 14:42:57,626 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2021-12-22 14:42:57,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2021-12-22 14:42:57,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-22 14:42:57,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-22 14:42:57,627 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-12-22 14:42:57,627 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-12-22 14:42:57,627 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-12-22 14:42:57,627 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-12-22 14:42:57,627 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-12-22 14:42:57,628 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-12-22 14:42:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-22 14:42:57,628 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-22 14:42:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-22 14:42:57,628 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-22 14:42:57,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-22 14:42:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2021-12-22 14:42:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2021-12-22 14:42:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2021-12-22 14:42:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2021-12-22 14:42:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-22 14:42:57,629 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-22 14:42:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-22 14:42:57,629 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2021-12-22 14:42:57,630 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2021-12-22 14:42:57,630 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2021-12-22 14:42:57,630 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2021-12-22 14:42:57,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-22 14:42:57,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-22 14:42:57,631 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-22 14:42:57,632 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2021-12-22 14:42:57,633 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2021-12-22 14:42:57,633 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-22 14:42:57,633 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-22 14:42:57,633 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-12-22 14:42:57,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-12-22 14:42:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-22 14:42:57,634 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-22 14:42:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-22 14:42:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2021-12-22 14:42:57,634 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2021-12-22 14:42:57,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-22 14:42:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-12-22 14:42:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-12-22 14:42:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 14:42:57,635 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2021-12-22 14:42:57,635 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2021-12-22 14:42:57,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-22 14:42:57,636 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2021-12-22 14:42:57,636 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2021-12-22 14:42:57,636 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2021-12-22 14:42:57,636 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2021-12-22 14:42:57,636 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-12-22 14:42:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-12-22 14:42:57,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 14:42:57,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 14:42:57,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 14:42:57,964 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 14:42:57,966 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 14:42:58,167 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-22 14:43:01,487 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 14:43:01,494 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 14:43:01,495 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 14:43:01,497 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:43:01 BoogieIcfgContainer [2021-12-22 14:43:01,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 14:43:01,498 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 14:43:01,498 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 14:43:01,503 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 14:43:01,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 02:42:55" (1/3) ... [2021-12-22 14:43:01,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66586f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:43:01, skipping insertion in model container [2021-12-22 14:43:01,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 02:42:57" (2/3) ... [2021-12-22 14:43:01,504 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66586f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 02:43:01, skipping insertion in model container [2021-12-22 14:43:01,504 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 02:43:01" (3/3) ... [2021-12-22 14:43:01,505 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-12-22 14:43:01,511 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 14:43:01,511 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 14:43:01,558 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 14:43:01,566 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 14:43:01,566 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 14:43:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-22 14:43:01,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 14:43:01,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:01,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:01,618 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:01,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:01,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2015975527, now seen corresponding path program 1 times [2021-12-22 14:43:01,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:01,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844630761] [2021-12-22 14:43:01,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:01,630 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:01,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 14:43:02,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:02,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844630761] [2021-12-22 14:43:02,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844630761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:02,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:02,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:43:02,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636963790] [2021-12-22 14:43:02,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:02,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:43:02,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:02,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:43:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:02,026 INFO L87 Difference]: Start difference. First operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:43:05,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:05,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:05,474 INFO L93 Difference]: Finished difference Result 1083 states and 1544 transitions. [2021-12-22 14:43:05,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 14:43:05,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-12-22 14:43:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:05,489 INFO L225 Difference]: With dead ends: 1083 [2021-12-22 14:43:05,489 INFO L226 Difference]: Without dead ends: 563 [2021-12-22 14:43:05,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:05,497 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 216 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:05,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1343 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 502 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-12-22 14:43:05,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-12-22 14:43:05,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2021-12-22 14:43:05,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 385 states have (on average 1.3428571428571427) internal successors, (517), 389 states have internal predecessors, (517), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-22 14:43:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 702 transitions. [2021-12-22 14:43:05,566 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 702 transitions. Word has length 30 [2021-12-22 14:43:05,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:05,566 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 702 transitions. [2021-12-22 14:43:05,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 14:43:05,567 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 702 transitions. [2021-12-22 14:43:05,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-22 14:43:05,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:05,574 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:05,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 14:43:05,574 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:05,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1592596621, now seen corresponding path program 1 times [2021-12-22 14:43:05,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:05,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093538643] [2021-12-22 14:43:05,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:05,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:05,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:05,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:05,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 14:43:05,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:05,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093538643] [2021-12-22 14:43:05,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093538643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:05,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:05,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:43:05,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824016717] [2021-12-22 14:43:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:05,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:43:05,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:43:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:05,810 INFO L87 Difference]: Start difference. First operand 512 states and 702 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:09,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:09,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:09,178 INFO L93 Difference]: Finished difference Result 1067 states and 1492 transitions. [2021-12-22 14:43:09,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:43:09,179 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-12-22 14:43:09,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:09,183 INFO L225 Difference]: With dead ends: 1067 [2021-12-22 14:43:09,183 INFO L226 Difference]: Without dead ends: 571 [2021-12-22 14:43:09,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:09,188 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 173 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:09,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1314 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 495 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-12-22 14:43:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-12-22 14:43:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 519. [2021-12-22 14:43:09,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 392 states have (on average 1.344387755102041) internal successors, (527), 396 states have internal predecessors, (527), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-22 14:43:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 712 transitions. [2021-12-22 14:43:09,251 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 712 transitions. Word has length 49 [2021-12-22 14:43:09,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:09,252 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 712 transitions. [2021-12-22 14:43:09,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:09,252 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 712 transitions. [2021-12-22 14:43:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 14:43:09,256 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:09,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:09,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 14:43:09,257 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:09,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:09,259 INFO L85 PathProgramCache]: Analyzing trace with hash -725279773, now seen corresponding path program 1 times [2021-12-22 14:43:09,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:09,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744692259] [2021-12-22 14:43:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:09,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:09,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:09,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 14:43:09,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744692259] [2021-12-22 14:43:09,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744692259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:09,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:09,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 14:43:09,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104719251] [2021-12-22 14:43:09,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:09,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 14:43:09,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 14:43:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:09,389 INFO L87 Difference]: Start difference. First operand 519 states and 712 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:12,362 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:12,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:12,485 INFO L93 Difference]: Finished difference Result 1115 states and 1567 transitions. [2021-12-22 14:43:12,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 14:43:12,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2021-12-22 14:43:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:12,489 INFO L225 Difference]: With dead ends: 1115 [2021-12-22 14:43:12,489 INFO L226 Difference]: Without dead ends: 612 [2021-12-22 14:43:12,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 14:43:12,491 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 222 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:12,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1315 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 501 Invalid, 1 Unknown, 0 Unchecked, 3.1s Time] [2021-12-22 14:43:12,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-12-22 14:43:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 560. [2021-12-22 14:43:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 431 states have (on average 1.359628770301624) internal successors, (586), 435 states have internal predecessors, (586), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-12-22 14:43:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 775 transitions. [2021-12-22 14:43:12,519 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 775 transitions. Word has length 55 [2021-12-22 14:43:12,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:12,519 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 775 transitions. [2021-12-22 14:43:12,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 14:43:12,520 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 775 transitions. [2021-12-22 14:43:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-22 14:43:12,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:12,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:12,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 14:43:12,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash -232463337, now seen corresponding path program 1 times [2021-12-22 14:43:12,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:12,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273888613] [2021-12-22 14:43:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:12,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:12,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:12,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:12,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:43:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 14:43:12,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:12,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273888613] [2021-12-22 14:43:12,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273888613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:12,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:12,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:43:12,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998834744] [2021-12-22 14:43:12,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:12,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:12,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:12,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:12,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:12,705 INFO L87 Difference]: Start difference. First operand 560 states and 775 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:16,702 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:18,727 WARN L534 Checker$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 14:43:20,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:21,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:22,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:22,101 INFO L93 Difference]: Finished difference Result 1531 states and 2229 transitions. [2021-12-22 14:43:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:43:22,102 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2021-12-22 14:43:22,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:22,106 INFO L225 Difference]: With dead ends: 1531 [2021-12-22 14:43:22,106 INFO L226 Difference]: Without dead ends: 987 [2021-12-22 14:43:22,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:43:22,108 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 701 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 346 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:22,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1545 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 936 Invalid, 3 Unknown, 0 Unchecked, 9.3s Time] [2021-12-22 14:43:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-12-22 14:43:22,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 562. [2021-12-22 14:43:22,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 433 states have (on average 1.3579676674364896) internal successors, (588), 437 states have internal predecessors, (588), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-12-22 14:43:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 777 transitions. [2021-12-22 14:43:22,126 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 777 transitions. Word has length 78 [2021-12-22 14:43:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:22,126 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 777 transitions. [2021-12-22 14:43:22,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:22,126 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 777 transitions. [2021-12-22 14:43:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-22 14:43:22,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:22,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:22,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 14:43:22,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1595880674, now seen corresponding path program 1 times [2021-12-22 14:43:22,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:22,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865298412] [2021-12-22 14:43:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:22,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:22,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:22,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:22,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:43:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:22,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:43:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 14:43:22,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:22,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865298412] [2021-12-22 14:43:22,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865298412] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:22,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:22,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:43:22,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262207110] [2021-12-22 14:43:22,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:22,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:22,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:22,263 INFO L87 Difference]: Start difference. First operand 562 states and 777 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 14:43:25,604 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:26,287 INFO L93 Difference]: Finished difference Result 1344 states and 1870 transitions. [2021-12-22 14:43:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 14:43:26,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 81 [2021-12-22 14:43:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:26,291 INFO L225 Difference]: With dead ends: 1344 [2021-12-22 14:43:26,292 INFO L226 Difference]: Without dead ends: 798 [2021-12-22 14:43:26,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:43:26,294 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 944 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 424 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:26,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1303 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 777 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-12-22 14:43:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-12-22 14:43:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 703. [2021-12-22 14:43:26,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 537 states have (on average 1.3463687150837989) internal successors, (723), 542 states have internal predecessors, (723), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-22 14:43:26,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 958 transitions. [2021-12-22 14:43:26,315 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 958 transitions. Word has length 81 [2021-12-22 14:43:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:26,316 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 958 transitions. [2021-12-22 14:43:26,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-22 14:43:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 958 transitions. [2021-12-22 14:43:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 14:43:26,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:26,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:26,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 14:43:26,318 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:26,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:26,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1746632066, now seen corresponding path program 1 times [2021-12-22 14:43:26,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:26,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236527116] [2021-12-22 14:43:26,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:26,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:26,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:26,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:26,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:26,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:43:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:26,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 14:43:26,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:26,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236527116] [2021-12-22 14:43:26,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236527116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:26,452 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:26,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:43:26,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259070979] [2021-12-22 14:43:26,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:26,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:26,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:26,455 INFO L87 Difference]: Start difference. First operand 703 states and 958 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:30,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:32,737 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:35,532 WARN L534 Checker$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 14:43:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:35,667 INFO L93 Difference]: Finished difference Result 1869 states and 2665 transitions. [2021-12-22 14:43:35,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:43:35,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-12-22 14:43:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:35,672 INFO L225 Difference]: With dead ends: 1869 [2021-12-22 14:43:35,672 INFO L226 Difference]: Without dead ends: 1182 [2021-12-22 14:43:35,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:43:35,676 INFO L933 BasicCegarLoop]: 876 mSDtfsCounter, 620 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 258 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 680 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:35,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [680 Valid, 2078 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1088 Invalid, 3 Unknown, 0 Unchecked, 9.1s Time] [2021-12-22 14:43:35,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-12-22 14:43:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 757. [2021-12-22 14:43:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 591 states have (on average 1.365482233502538) internal successors, (807), 596 states have internal predecessors, (807), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-22 14:43:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1042 transitions. [2021-12-22 14:43:35,702 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1042 transitions. Word has length 83 [2021-12-22 14:43:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:35,702 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1042 transitions. [2021-12-22 14:43:35,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1042 transitions. [2021-12-22 14:43:35,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-22 14:43:35,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:35,707 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:35,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 14:43:35,707 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:35,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:35,708 INFO L85 PathProgramCache]: Analyzing trace with hash -247512640, now seen corresponding path program 1 times [2021-12-22 14:43:35,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:35,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977917122] [2021-12-22 14:43:35,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:35,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:35,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:35,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:35,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:43:35,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 14:43:35,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:35,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977917122] [2021-12-22 14:43:35,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977917122] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:43:35,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728858208] [2021-12-22 14:43:35,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:35,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:43:35,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:43:35,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:43:35,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 14:43:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:36,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2884 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 14:43:36,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:43:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 14:43:36,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 14:43:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-22 14:43:36,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728858208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 14:43:36,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 14:43:36,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-22 14:43:36,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728946758] [2021-12-22 14:43:36,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 14:43:36,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 14:43:36,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:36,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 14:43:36,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 14:43:36,754 INFO L87 Difference]: Start difference. First operand 757 states and 1042 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:41,547 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:43,577 WARN L534 Checker$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 14:43:45,731 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:46,152 INFO L93 Difference]: Finished difference Result 3177 states and 4755 transitions. [2021-12-22 14:43:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 14:43:46,155 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-12-22 14:43:46,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:46,165 INFO L225 Difference]: With dead ends: 3177 [2021-12-22 14:43:46,166 INFO L226 Difference]: Without dead ends: 2436 [2021-12-22 14:43:46,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-12-22 14:43:46,169 INFO L933 BasicCegarLoop]: 749 mSDtfsCounter, 2119 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 836 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2334 SdHoareTripleChecker+Valid, 2511 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:46,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2334 Valid, 2511 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 1822 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2021-12-22 14:43:46,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-12-22 14:43:46,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 817. [2021-12-22 14:43:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 651 states have (on average 1.368663594470046) internal successors, (891), 656 states have internal predecessors, (891), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-12-22 14:43:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1126 transitions. [2021-12-22 14:43:46,207 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1126 transitions. Word has length 83 [2021-12-22 14:43:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:46,208 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1126 transitions. [2021-12-22 14:43:46,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1126 transitions. [2021-12-22 14:43:46,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-12-22 14:43:46,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:46,210 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:46,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 14:43:46,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:43:46,427 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:46,427 INFO L85 PathProgramCache]: Analyzing trace with hash -2050556224, now seen corresponding path program 1 times [2021-12-22 14:43:46,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075768850] [2021-12-22 14:43:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:46,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:46,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:46,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:46,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 14:43:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:46,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-12-22 14:43:46,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:46,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:43:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:46,764 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 14:43:46,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:46,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075768850] [2021-12-22 14:43:46,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075768850] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:46,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:46,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 14:43:46,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082544418] [2021-12-22 14:43:46,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:46,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 14:43:46,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:46,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 14:43:46,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:43:46,766 INFO L87 Difference]: Start difference. First operand 817 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 14:43:49,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:51,632 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 14:43:52,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:52,570 INFO L93 Difference]: Finished difference Result 1685 states and 2342 transitions. [2021-12-22 14:43:52,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 14:43:52,571 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 96 [2021-12-22 14:43:52,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:52,574 INFO L225 Difference]: With dead ends: 1685 [2021-12-22 14:43:52,574 INFO L226 Difference]: Without dead ends: 884 [2021-12-22 14:43:52,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-12-22 14:43:52,577 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 772 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 442 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:52,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 2286 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1180 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-12-22 14:43:52,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-12-22 14:43:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 798. [2021-12-22 14:43:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 638 states have (on average 1.365203761755486) internal successors, (871), 643 states have internal predecessors, (871), 112 states have call successors, (112), 48 states have call predecessors, (112), 47 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-12-22 14:43:52,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1094 transitions. [2021-12-22 14:43:52,602 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1094 transitions. Word has length 96 [2021-12-22 14:43:52,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:52,602 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1094 transitions. [2021-12-22 14:43:52,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 14:43:52,602 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1094 transitions. [2021-12-22 14:43:52,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 14:43:52,603 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:52,604 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:52,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 14:43:52,604 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:52,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:52,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2089394007, now seen corresponding path program 2 times [2021-12-22 14:43:52,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:52,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181943603] [2021-12-22 14:43:52,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:52,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:52,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:52,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:52,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:52,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:43:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-22 14:43:52,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:52,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181943603] [2021-12-22 14:43:52,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181943603] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:52,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:43:52,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 14:43:52,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464495059] [2021-12-22 14:43:52,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:52,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:52,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:52,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:52,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 14:43:52,735 INFO L87 Difference]: Start difference. First operand 798 states and 1094 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:55,821 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-22 14:43:57,847 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 14:43:58,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:58,371 INFO L93 Difference]: Finished difference Result 1092 states and 1550 transitions. [2021-12-22 14:43:58,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 14:43:58,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 98 [2021-12-22 14:43:58,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:58,376 INFO L225 Difference]: With dead ends: 1092 [2021-12-22 14:43:58,376 INFO L226 Difference]: Without dead ends: 1089 [2021-12-22 14:43:58,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 14:43:58,377 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1021 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 325 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:58,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1097 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-12-22 14:43:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-12-22 14:43:58,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 802. [2021-12-22 14:43:58,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 641 states have (on average 1.3634945397815912) internal successors, (874), 646 states have internal predecessors, (874), 112 states have call successors, (112), 49 states have call predecessors, (112), 48 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-12-22 14:43:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1097 transitions. [2021-12-22 14:43:58,436 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1097 transitions. Word has length 98 [2021-12-22 14:43:58,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:58,436 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1097 transitions. [2021-12-22 14:43:58,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 14:43:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1097 transitions. [2021-12-22 14:43:58,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-22 14:43:58,438 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:58,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:58,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 14:43:58,438 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:58,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:58,439 INFO L85 PathProgramCache]: Analyzing trace with hash -853712003, now seen corresponding path program 1 times [2021-12-22 14:43:58,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:58,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619083257] [2021-12-22 14:43:58,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:58,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:43:58,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:43:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:43:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 14:43:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-22 14:43:58,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-12-22 14:43:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-22 14:43:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 14:43:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-22 14:43:58,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:43:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-22 14:43:58,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:43:58,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619083257] [2021-12-22 14:43:58,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619083257] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 14:43:58,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714082795] [2021-12-22 14:43:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:58,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 14:43:58,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 14:43:58,720 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 14:43:58,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 14:43:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:43:59,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 3750 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 14:43:59,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 14:43:59,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-22 14:43:59,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 14:43:59,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714082795] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:43:59,541 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 14:43:59,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-12-22 14:43:59,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630576562] [2021-12-22 14:43:59,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:43:59,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 14:43:59,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:43:59,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 14:43:59,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-22 14:43:59,543 INFO L87 Difference]: Start difference. First operand 802 states and 1097 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 14:43:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 14:43:59,683 INFO L93 Difference]: Finished difference Result 2141 states and 2940 transitions. [2021-12-22 14:43:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 14:43:59,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-12-22 14:43:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 14:43:59,688 INFO L225 Difference]: With dead ends: 2141 [2021-12-22 14:43:59,688 INFO L226 Difference]: Without dead ends: 1355 [2021-12-22 14:43:59,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-22 14:43:59,690 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 510 mSDsluCounter, 3011 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 4189 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 14:43:59,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 4189 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 14:43:59,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-12-22 14:43:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 806. [2021-12-22 14:43:59,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 644 states have (on average 1.3618012422360248) internal successors, (877), 649 states have internal predecessors, (877), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2021-12-22 14:43:59,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1101 transitions. [2021-12-22 14:43:59,732 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1101 transitions. Word has length 116 [2021-12-22 14:43:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 14:43:59,732 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1101 transitions. [2021-12-22 14:43:59,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-22 14:43:59,732 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1101 transitions. [2021-12-22 14:43:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-12-22 14:43:59,734 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 14:43:59,734 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 14:43:59,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 14:43:59,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-22 14:43:59,957 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 14:43:59,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 14:43:59,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2124736263, now seen corresponding path program 1 times [2021-12-22 14:43:59,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 14:43:59,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077260286] [2021-12-22 14:43:59,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 14:43:59,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 14:44:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 14:44:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 14:44:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-22 14:44:00,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 14:44:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:44:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 14:44:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-12-22 14:44:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-22 14:44:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-22 14:44:00,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:44:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-12-22 14:44:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-22 14:44:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-12-22 14:44:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-22 14:44:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-12-22 14:44:00,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-12-22 14:44:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 14:44:00,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 14:44:00,322 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-22 14:44:00,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 14:44:00,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077260286] [2021-12-22 14:44:00,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077260286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 14:44:00,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 14:44:00,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 14:44:00,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323027661] [2021-12-22 14:44:00,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 14:44:00,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 14:44:00,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 14:44:00,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 14:44:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 14:44:00,324 INFO L87 Difference]: Start difference. First operand 806 states and 1101 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-12-22 14:44:03,394 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []