./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--hisax--hfc_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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--hisax--hfc_usb.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 04:01:06,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 04:01:06,603 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 04:01:06,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 04:01:06,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 04:01:06,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 04:01:06,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 04:01:06,659 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 04:01:06,662 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 04:01:06,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 04:01:06,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 04:01:06,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 04:01:06,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 04:01:06,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 04:01:06,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 04:01:06,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 04:01:06,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 04:01:06,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 04:01:06,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 04:01:06,687 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 04:01:06,689 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 04:01:06,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 04:01:06,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 04:01:06,695 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 04:01:06,698 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 04:01:06,699 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 04:01:06,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 04:01:06,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 04:01:06,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 04:01:06,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 04:01:06,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 04:01:06,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 04:01:06,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 04:01:06,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 04:01:06,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 04:01:06,707 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 04:01:06,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 04:01:06,708 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 04:01:06,708 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 04:01:06,709 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 04:01:06,710 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 04:01:06,714 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-28 04:01:06,742 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 04:01:06,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 04:01:06,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 04:01:06,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 04:01:06,745 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 04:01:06,745 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 04:01:06,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 04:01:06,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 04:01:06,746 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 04:01:06,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 04:01:06,747 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 04:01:06,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 04:01:06,748 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 04:01:06,748 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 04:01:06,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 04:01:06,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 04:01:06,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 04:01:06,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 04:01:06,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 04:01:06,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 04:01:06,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 04:01:06,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 04:01:06,750 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 04:01:06,750 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 04:01:06,750 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 04:01:06,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 04:01:06,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 04:01:06,751 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 04:01:06,751 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 04:01:06,751 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 04:01:06,751 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cfca91e359676f221b9d3196f23901e359124e72b956d963114c00faf4f7248 [2021-12-28 04:01:07,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 04:01:07,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 04:01:07,081 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 04:01:07,083 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 04:01:07,084 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 04:01:07,085 INFO L432 ainManager$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--hisax--hfc_usb.ko-entry_point.cil.out.i [2021-12-28 04:01:07,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05634d2c/b506948413aa487f9487f3ad934f48a5/FLAG5fcba4d37 [2021-12-28 04:01:07,834 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 04:01:07,835 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--hisax--hfc_usb.ko-entry_point.cil.out.i [2021-12-28 04:01:07,882 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05634d2c/b506948413aa487f9487f3ad934f48a5/FLAG5fcba4d37 [2021-12-28 04:01:07,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b05634d2c/b506948413aa487f9487f3ad934f48a5 [2021-12-28 04:01:07,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 04:01:07,918 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 04:01:07,920 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 04:01:07,920 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 04:01:07,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 04:01:07,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 04:01:07" (1/1) ... [2021-12-28 04:01:07,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9feac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:07, skipping insertion in model container [2021-12-28 04:01:07,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 04:01:07" (1/1) ... [2021-12-28 04:01:07,934 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 04:01:08,039 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 04:01:08,554 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2021-12-28 04:01:08,555 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6709-6710] [2021-12-28 04:01:08,717 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--hisax--hfc_usb.ko-entry_point.cil.out.i[192641,192654] [2021-12-28 04:01:09,465 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 04:01:09,511 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 04:01:09,656 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6708] [2021-12-28 04:01:09,656 WARN L1240 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6709-6710] [2021-12-28 04:01:09,660 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--hisax--hfc_usb.ko-entry_point.cil.out.i[192641,192654] [2021-12-28 04:01:09,845 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 04:01:09,910 INFO L208 MainTranslator]: Completed translation [2021-12-28 04:01:09,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09 WrapperNode [2021-12-28 04:01:09,911 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 04:01:09,912 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 04:01:09,912 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 04:01:09,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 04:01:09,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,010 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,118 INFO L137 Inliner]: procedures = 151, calls = 1509, calls flagged for inlining = 53, calls inlined = 38, statements flattened = 2211 [2021-12-28 04:01:10,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 04:01:10,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 04:01:10,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 04:01:10,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 04:01:10,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,151 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,282 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 04:01:10,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 04:01:10,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 04:01:10,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 04:01:10,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (1/1) ... [2021-12-28 04:01:10,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 04:01:10,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 04:01:10,321 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) [2021-12-28 04:01:10,335 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 [2021-12-28 04:01:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-28 04:01:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-28 04:01:10,360 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-28 04:01:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2021-12-28 04:01:10,360 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2021-12-28 04:01:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-28 04:01:10,360 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-28 04:01:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-28 04:01:10,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-28 04:01:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 04:01:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure start_int_fifo [2021-12-28 04:01:10,361 INFO L138 BoogieDeclarations]: Found implementation of procedure start_int_fifo [2021-12-28 04:01:10,361 INFO L130 BoogieDeclarations]: Found specification of procedure symbolic [2021-12-28 04:01:10,362 INFO L138 BoogieDeclarations]: Found implementation of procedure symbolic [2021-12-28 04:01:10,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-28 04:01:10,362 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-28 04:01:10,362 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-28 04:01:10,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-28 04:01:10,362 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-28 04:01:10,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-28 04:01:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-12-28 04:01:10,363 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-12-28 04:01:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-12-28 04:01:10,363 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-12-28 04:01:10,363 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-28 04:01:10,364 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-28 04:01:10,364 INFO L130 BoogieDeclarations]: Found specification of procedure start_isoc_chain [2021-12-28 04:01:10,364 INFO L138 BoogieDeclarations]: Found implementation of procedure start_isoc_chain [2021-12-28 04:01:10,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 04:01:10,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-28 04:01:10,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-28 04:01:10,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-28 04:01:10,365 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-28 04:01:10,365 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-28 04:01:10,365 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-28 04:01:10,365 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer [2021-12-28 04:01:10,365 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer [2021-12-28 04:01:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure timer_pending [2021-12-28 04:01:10,366 INFO L138 BoogieDeclarations]: Found implementation of procedure timer_pending [2021-12-28 04:01:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-28 04:01:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2021-12-28 04:01:10,366 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2021-12-28 04:01:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 04:01:10,366 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2021-12-28 04:01:10,367 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2021-12-28 04:01:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 04:01:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-28 04:01:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-12-28 04:01:10,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-12-28 04:01:10,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-28 04:01:10,368 INFO L130 BoogieDeclarations]: Found specification of procedure usb_control_msg [2021-12-28 04:01:10,368 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_control_msg [2021-12-28 04:01:10,368 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-28 04:01:10,368 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-28 04:01:10,368 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2021-12-28 04:01:10,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2021-12-28 04:01:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure queue_control_request [2021-12-28 04:01:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_control_request [2021-12-28 04:01:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 04:01:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-28 04:01:10,369 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~int~TO~VOID [2021-12-28 04:01:10,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~int~TO~VOID [2021-12-28 04:01:10,370 INFO L130 BoogieDeclarations]: Found specification of procedure fill_isoc_urb [2021-12-28 04:01:10,370 INFO L138 BoogieDeclarations]: Found implementation of procedure fill_isoc_urb [2021-12-28 04:01:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-12-28 04:01:10,403 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-12-28 04:01:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 04:01:10,403 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-28 04:01:10,403 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-28 04:01:10,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-28 04:01:10,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-12-28 04:01:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-12-28 04:01:10,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 04:01:10,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 04:01:10,752 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 04:01:10,755 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 04:01:11,024 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-28 04:01:14,938 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 04:01:14,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 04:01:14,957 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 04:01:14,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 04:01:14 BoogieIcfgContainer [2021-12-28 04:01:14,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 04:01:14,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 04:01:14,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 04:01:14,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 04:01:14,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 04:01:07" (1/3) ... [2021-12-28 04:01:14,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460b4ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 04:01:14, skipping insertion in model container [2021-12-28 04:01:14,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 04:01:09" (2/3) ... [2021-12-28 04:01:14,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@460b4ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 04:01:14, skipping insertion in model container [2021-12-28 04:01:14,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 04:01:14" (3/3) ... [2021-12-28 04:01:14,972 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hisax--hfc_usb.ko-entry_point.cil.out.i [2021-12-28 04:01:14,977 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 04:01:14,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 04:01:15,035 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 04:01:15,041 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 [2021-12-28 04:01:15,044 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 04:01:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 524 states, 389 states have (on average 1.3496143958868894) internal successors, (525), 397 states have internal predecessors, (525), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2021-12-28 04:01:15,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-28 04:01:15,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:01:15,092 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] [2021-12-28 04:01:15,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:01:15,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:01:15,101 INFO L85 PathProgramCache]: Analyzing trace with hash 453274785, now seen corresponding path program 1 times [2021-12-28 04:01:15,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:01:15,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317589732] [2021-12-28 04:01:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:01:15,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:01:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:15,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:01:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 04:01:15,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:01:15,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317589732] [2021-12-28 04:01:15,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317589732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:01:15,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:01:15,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 04:01:15,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116918592] [2021-12-28 04:01:15,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:01:15,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 04:01:15,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:01:15,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 04:01:15,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 04:01:15,719 INFO L87 Difference]: Start difference. First operand has 524 states, 389 states have (on average 1.3496143958868894) internal successors, (525), 397 states have internal predecessors, (525), 105 states have call successors, (105), 29 states have call predecessors, (105), 28 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 04:01:19,665 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 [] [2021-12-28 04:01:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:01:20,813 INFO L93 Difference]: Finished difference Result 1128 states and 1611 transitions. [2021-12-28 04:01:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 04:01:20,816 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-12-28 04:01:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:01:20,830 INFO L225 Difference]: With dead ends: 1128 [2021-12-28 04:01:20,831 INFO L226 Difference]: Without dead ends: 586 [2021-12-28 04:01:20,840 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 [2021-12-28 04:01:20,843 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 178 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 119 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-28 04:01:20,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1481 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 522 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2021-12-28 04:01:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-12-28 04:01:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 547. [2021-12-28 04:01:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 411 states have (on average 1.340632603406326) internal successors, (551), 414 states have internal predecessors, (551), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2021-12-28 04:01:20,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 760 transitions. [2021-12-28 04:01:20,962 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 760 transitions. Word has length 28 [2021-12-28 04:01:20,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:01:20,963 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 760 transitions. [2021-12-28 04:01:20,963 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-28 04:01:20,964 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 760 transitions. [2021-12-28 04:01:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-28 04:01:20,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:01:20,967 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] [2021-12-28 04:01:20,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 04:01:20,967 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:01:20,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:01:20,968 INFO L85 PathProgramCache]: Analyzing trace with hash -914067174, now seen corresponding path program 1 times [2021-12-28 04:01:20,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:01:20,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663063254] [2021-12-28 04:01:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:01:20,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:01:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:21,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:01:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:21,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 04:01:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 04:01:21,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:01:21,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663063254] [2021-12-28 04:01:21,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663063254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:01:21,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:01:21,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 04:01:21,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932878937] [2021-12-28 04:01:21,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:01:21,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 04:01:21,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:01:21,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 04:01:21,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:01:21,154 INFO L87 Difference]: Start difference. First operand 547 states and 760 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 04:01:24,888 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 [] [2021-12-28 04:01:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:01:26,993 INFO L93 Difference]: Finished difference Result 1119 states and 1564 transitions. [2021-12-28 04:01:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 04:01:26,994 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-28 04:01:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:01:27,004 INFO L225 Difference]: With dead ends: 1119 [2021-12-28 04:01:27,005 INFO L226 Difference]: Without dead ends: 585 [2021-12-28 04:01:27,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 04:01:27,011 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 114 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1946 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-28 04:01:27,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 1946 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 716 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-12-28 04:01:27,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-12-28 04:01:27,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 547. [2021-12-28 04:01:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 547 states, 411 states have (on average 1.338199513381995) internal successors, (550), 414 states have internal predecessors, (550), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2021-12-28 04:01:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 759 transitions. [2021-12-28 04:01:27,064 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 759 transitions. Word has length 48 [2021-12-28 04:01:27,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:01:27,065 INFO L470 AbstractCegarLoop]: Abstraction has 547 states and 759 transitions. [2021-12-28 04:01:27,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 04:01:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 759 transitions. [2021-12-28 04:01:27,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-28 04:01:27,072 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:01:27,073 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] [2021-12-28 04:01:27,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 04:01:27,074 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:01:27,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:01:27,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1575461788, now seen corresponding path program 1 times [2021-12-28 04:01:27,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:01:27,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443986952] [2021-12-28 04:01:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:01:27,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:01:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:01:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 04:01:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 04:01:27,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:01:27,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443986952] [2021-12-28 04:01:27,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443986952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:01:27,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:01:27,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 04:01:27,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331331976] [2021-12-28 04:01:27,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:01:27,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 04:01:27,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:01:27,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 04:01:27,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 04:01:27,292 INFO L87 Difference]: Start difference. First operand 547 states and 759 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 04:01:30,705 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 [] [2021-12-28 04:01:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:01:32,090 INFO L93 Difference]: Finished difference Result 1245 states and 1753 transitions. [2021-12-28 04:01:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 04:01:32,090 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-28 04:01:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:01:32,095 INFO L225 Difference]: With dead ends: 1245 [2021-12-28 04:01:32,095 INFO L226 Difference]: Without dead ends: 714 [2021-12-28 04:01:32,097 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 [2021-12-28 04:01:32,098 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 224 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 106 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-28 04:01:32,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 1686 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 546 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2021-12-28 04:01:32,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-12-28 04:01:32,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 554. [2021-12-28 04:01:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 418 states have (on average 1.3397129186602872) internal successors, (560), 421 states have internal predecessors, (560), 105 states have call successors, (105), 31 states have call predecessors, (105), 30 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2021-12-28 04:01:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 769 transitions. [2021-12-28 04:01:32,122 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 769 transitions. Word has length 48 [2021-12-28 04:01:32,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:01:32,122 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 769 transitions. [2021-12-28 04:01:32,123 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 04:01:32,123 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 769 transitions. [2021-12-28 04:01:32,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-28 04:01:32,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:01:32,124 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 04:01:32,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 04:01:32,125 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:01:32,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:01:32,125 INFO L85 PathProgramCache]: Analyzing trace with hash -809569934, now seen corresponding path program 1 times [2021-12-28 04:01:32,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:01:32,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129460844] [2021-12-28 04:01:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:01:32,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:01:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:32,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:01:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:32,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 04:01:32,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 04:01:32,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:01:32,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129460844] [2021-12-28 04:01:32,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129460844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:01:32,289 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:01:32,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 04:01:32,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236237664] [2021-12-28 04:01:32,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:01:32,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 04:01:32,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:01:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 04:01:32,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 04:01:32,293 INFO L87 Difference]: Start difference. First operand 554 states and 769 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 04:01:35,651 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 [] [2021-12-28 04:01:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:01:36,960 INFO L93 Difference]: Finished difference Result 1292 states and 1826 transitions. [2021-12-28 04:01:36,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 04:01:36,963 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2021-12-28 04:01:36,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:01:36,968 INFO L225 Difference]: With dead ends: 1292 [2021-12-28 04:01:36,969 INFO L226 Difference]: Without dead ends: 754 [2021-12-28 04:01:36,971 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 [2021-12-28 04:01:36,974 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 271 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 108 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 1702 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-28 04:01:36,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 1702 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 555 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2021-12-28 04:01:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-12-28 04:01:37,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 594. [2021-12-28 04:01:37,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 456 states have (on average 1.3530701754385965) internal successors, (617), 459 states have internal predecessors, (617), 107 states have call successors, (107), 31 states have call predecessors, (107), 30 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2021-12-28 04:01:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 830 transitions. [2021-12-28 04:01:37,014 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 830 transitions. Word has length 54 [2021-12-28 04:01:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:01:37,016 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 830 transitions. [2021-12-28 04:01:37,017 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-28 04:01:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 830 transitions. [2021-12-28 04:01:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 04:01:37,019 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:01:37,019 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 04:01:37,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 04:01:37,019 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:01:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:01:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash -819742023, now seen corresponding path program 1 times [2021-12-28 04:01:37,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:01:37,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568812404] [2021-12-28 04:01:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:01:37,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:01:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:37,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:01:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:37,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 04:01:37,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:37,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 04:01:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 04:01:37,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:01:37,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568812404] [2021-12-28 04:01:37,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568812404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:01:37,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:01:37,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 04:01:37,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145855339] [2021-12-28 04:01:37,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:01:37,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 04:01:37,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:01:37,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 04:01:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:01:37,325 INFO L87 Difference]: Start difference. First operand 594 states and 830 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 04:01:41,005 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 [] [2021-12-28 04:01:43,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:01:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:01:45,624 INFO L93 Difference]: Finished difference Result 1350 states and 1885 transitions. [2021-12-28 04:01:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 04:01:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-28 04:01:45,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:01:45,629 INFO L225 Difference]: With dead ends: 1350 [2021-12-28 04:01:45,629 INFO L226 Difference]: Without dead ends: 772 [2021-12-28 04:01:45,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 04:01:45,632 INFO L933 BasicCegarLoop]: 804 mSDtfsCounter, 776 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 267 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 835 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-12-28 04:01:45,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [835 Valid, 1569 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 825 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2021-12-28 04:01:45,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-12-28 04:01:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 719. [2021-12-28 04:01:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 550 states have (on average 1.3509090909090908) internal successors, (743), 554 states have internal predecessors, (743), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-28 04:01:45,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 996 transitions. [2021-12-28 04:01:45,660 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 996 transitions. Word has length 68 [2021-12-28 04:01:45,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:01:45,660 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 996 transitions. [2021-12-28 04:01:45,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 04:01:45,661 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 996 transitions. [2021-12-28 04:01:45,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 04:01:45,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:01:45,662 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 04:01:45,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 04:01:45,663 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:01:45,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:01:45,663 INFO L85 PathProgramCache]: Analyzing trace with hash -504486881, now seen corresponding path program 1 times [2021-12-28 04:01:45,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:01:45,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531121204] [2021-12-28 04:01:45,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:01:45,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:01:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:45,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:01:45,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:45,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 04:01:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:45,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-28 04:01:45,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:45,815 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 04:01:45,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:01:45,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531121204] [2021-12-28 04:01:45,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531121204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:01:45,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:01:45,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 04:01:45,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341103604] [2021-12-28 04:01:45,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:01:45,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 04:01:45,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:01:45,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 04:01:45,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 04:01:45,818 INFO L87 Difference]: Start difference. First operand 719 states and 996 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 04:01:49,789 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 [] [2021-12-28 04:01:51,822 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:01:55,645 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:01:57,682 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:01:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 04:01:57,763 INFO L93 Difference]: Finished difference Result 1816 states and 2582 transitions. [2021-12-28 04:01:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 04:01:57,763 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-12-28 04:01:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 04:01:57,770 INFO L225 Difference]: With dead ends: 1816 [2021-12-28 04:01:57,770 INFO L226 Difference]: Without dead ends: 1113 [2021-12-28 04:01:57,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 04:01:57,774 INFO L933 BasicCegarLoop]: 777 mSDtfsCounter, 499 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 345 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1873 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2021-12-28 04:01:57,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 1873 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 954 Invalid, 4 Unknown, 0 Unchecked, 11.8s Time] [2021-12-28 04:01:57,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-12-28 04:01:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 721. [2021-12-28 04:01:57,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 552 states have (on average 1.3496376811594204) internal successors, (745), 556 states have internal predecessors, (745), 127 states have call successors, (127), 42 states have call predecessors, (127), 41 states have return successors, (126), 126 states have call predecessors, (126), 126 states have call successors, (126) [2021-12-28 04:01:57,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 998 transitions. [2021-12-28 04:01:57,805 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 998 transitions. Word has length 77 [2021-12-28 04:01:57,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 04:01:57,805 INFO L470 AbstractCegarLoop]: Abstraction has 721 states and 998 transitions. [2021-12-28 04:01:57,805 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, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-28 04:01:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 998 transitions. [2021-12-28 04:01:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-28 04:01:57,807 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 04:01:57,807 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-28 04:01:57,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 04:01:57,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 04:01:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 04:01:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1854822344, now seen corresponding path program 1 times [2021-12-28 04:01:57,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 04:01:57,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039500569] [2021-12-28 04:01:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 04:01:57,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 04:01:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:57,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-28 04:01:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:57,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 04:01:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:58,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2021-12-28 04:01:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 04:01:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-28 04:01:58,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 04:01:58,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039500569] [2021-12-28 04:01:58,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039500569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 04:01:58,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 04:01:58,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 04:01:58,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671510756] [2021-12-28 04:01:58,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 04:01:58,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 04:01:58,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 04:01:58,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 04:01:58,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 04:01:58,014 INFO L87 Difference]: Start difference. First operand 721 states and 998 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 4 states have internal predecessors, (66), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 04:02:02,931 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 [] [2021-12-28 04:02:04,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:02:07,373 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:02:09,408 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-28 04:02:11,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []