./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 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-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.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 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-17 04:10:07,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-17 04:10:07,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-17 04:10:07,548 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-17 04:10:07,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-17 04:10:07,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-17 04:10:07,553 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-17 04:10:07,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-17 04:10:07,557 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-17 04:10:07,568 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-17 04:10:07,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-17 04:10:07,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-17 04:10:07,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-17 04:10:07,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-17 04:10:07,571 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-17 04:10:07,572 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-17 04:10:07,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-17 04:10:07,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-17 04:10:07,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-17 04:10:07,577 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-17 04:10:07,578 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-17 04:10:07,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-17 04:10:07,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-17 04:10:07,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-17 04:10:07,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-17 04:10:07,594 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-17 04:10:07,594 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-17 04:10:07,596 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-17 04:10:07,596 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-17 04:10:07,597 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-17 04:10:07,597 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-17 04:10:07,598 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-17 04:10:07,599 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-17 04:10:07,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-17 04:10:07,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-17 04:10:07,601 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-17 04:10:07,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-17 04:10:07,602 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-17 04:10:07,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-17 04:10:07,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-17 04:10:07,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-17 04:10:07,604 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-17 04:10:07,629 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-17 04:10:07,630 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-17 04:10:07,631 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-17 04:10:07,631 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-17 04:10:07,632 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-17 04:10:07,632 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-17 04:10:07,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-17 04:10:07,633 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-17 04:10:07,633 INFO L138 SettingsManager]: * Use SBE=true [2021-11-17 04:10:07,633 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-17 04:10:07,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-17 04:10:07,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-17 04:10:07,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-17 04:10:07,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-17 04:10:07,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-17 04:10:07,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-17 04:10:07,634 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-17 04:10:07,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-17 04:10:07,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-17 04:10:07,635 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-17 04:10:07,635 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-17 04:10:07,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 04:10:07,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-17 04:10:07,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-17 04:10:07,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-17 04:10:07,636 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-17 04:10:07,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-17 04:10:07,636 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-17 04:10:07,636 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-17 04:10:07,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-17 04:10:07,637 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-17 04:10:07,637 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab [2021-11-17 04:10:07,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-17 04:10:07,833 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-17 04:10:07,835 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-17 04:10:07,835 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-17 04:10:07,837 INFO L275 PluginConnector]: CDTParser initialized [2021-11-17 04:10:07,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-11-17 04:10:07,891 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6162b9751/ce82e74254df41c4b7f32d1aef3de3e8/FLAGe168966b3 [2021-11-17 04:10:08,540 INFO L306 CDTParser]: Found 1 translation units. [2021-11-17 04:10:08,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-11-17 04:10:08,571 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6162b9751/ce82e74254df41c4b7f32d1aef3de3e8/FLAGe168966b3 [2021-11-17 04:10:08,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6162b9751/ce82e74254df41c4b7f32d1aef3de3e8 [2021-11-17 04:10:08,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-17 04:10:08,874 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-17 04:10:08,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-17 04:10:08,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-17 04:10:08,878 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-17 04:10:08,879 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:10:08" (1/1) ... [2021-11-17 04:10:08,879 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a21a1ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:08, skipping insertion in model container [2021-11-17 04:10:08,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:10:08" (1/1) ... [2021-11-17 04:10:08,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-17 04:10:08,968 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-17 04:10:10,199 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-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-11-17 04:10:10,386 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 04:10:10,425 INFO L203 MainTranslator]: Completed pre-run [2021-11-17 04:10:10,694 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-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-11-17 04:10:10,747 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 04:10:10,811 INFO L208 MainTranslator]: Completed translation [2021-11-17 04:10:10,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10 WrapperNode [2021-11-17 04:10:10,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-17 04:10:10,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-17 04:10:10,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-17 04:10:10,815 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-17 04:10:10,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:10,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,030 INFO L137 Inliner]: procedures = 217, calls = 1688, calls flagged for inlining = 75, calls inlined = 52, statements flattened = 3521 [2021-11-17 04:10:11,031 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-17 04:10:11,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-17 04:10:11,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-17 04:10:11,032 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-17 04:10:11,046 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,046 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-17 04:10:11,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-17 04:10:11,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-17 04:10:11,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-17 04:10:11,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (1/1) ... [2021-11-17 04:10:11,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 04:10:11,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 04:10:11,232 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) [2021-11-17 04:10:11,280 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 [2021-11-17 04:10:11,295 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-17 04:10:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-17 04:10:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-17 04:10:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-17 04:10:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-17 04:10:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-17 04:10:11,296 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-17 04:10:11,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-17 04:10:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-17 04:10:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-17 04:10:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2021-11-17 04:10:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2021-11-17 04:10:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2021-11-17 04:10:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2021-11-17 04:10:11,297 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_common [2021-11-17 04:10:11,297 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_common [2021-11-17 04:10:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2021-11-17 04:10:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2021-11-17 04:10:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-17 04:10:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-17 04:10:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-11-17 04:10:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-11-17 04:10:11,298 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-17 04:10:11,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-17 04:10:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-17 04:10:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-17 04:10:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-17 04:10:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-17 04:10:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-11-17 04:10:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-11-17 04:10:11,299 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-17 04:10:11,299 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-17 04:10:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-17 04:10:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-17 04:10:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-17 04:10:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2021-11-17 04:10:11,300 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2021-11-17 04:10:11,300 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-11-17 04:10:11,301 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-11-17 04:10:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-17 04:10:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-17 04:10:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2021-11-17 04:10:11,301 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2021-11-17 04:10:11,301 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-17 04:10:11,301 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-17 04:10:11,302 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-11-17 04:10:11,302 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-11-17 04:10:11,302 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2021-11-17 04:10:11,302 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2021-11-17 04:10:11,302 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-17 04:10:11,302 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-17 04:10:11,302 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-17 04:10:11,302 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-17 04:10:11,303 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-17 04:10:11,303 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2021-11-17 04:10:11,303 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2021-11-17 04:10:11,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-17 04:10:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-11-17 04:10:11,304 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-11-17 04:10:11,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-17 04:10:11,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-11-17 04:10:11,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-11-17 04:10:11,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-17 04:10:11,305 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-17 04:10:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-17 04:10:11,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-17 04:10:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-17 04:10:11,306 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-17 04:10:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-11-17 04:10:11,306 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-11-17 04:10:11,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-17 04:10:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2021-11-17 04:10:11,307 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2021-11-17 04:10:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-17 04:10:11,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-17 04:10:11,307 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-17 04:10:11,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-17 04:10:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-17 04:10:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-17 04:10:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2021-11-17 04:10:11,308 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2021-11-17 04:10:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2021-11-17 04:10:11,308 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2021-11-17 04:10:11,308 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-17 04:10:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-17 04:10:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-17 04:10:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-17 04:10:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-17 04:10:11,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-11-17 04:10:11,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-11-17 04:10:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2021-11-17 04:10:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2021-11-17 04:10:11,310 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-17 04:10:11,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-17 04:10:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-17 04:10:11,311 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-17 04:10:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-11-17 04:10:11,311 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-11-17 04:10:11,311 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2021-11-17 04:10:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2021-11-17 04:10:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2021-11-17 04:10:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2021-11-17 04:10:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-17 04:10:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-17 04:10:11,312 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2021-11-17 04:10:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2021-11-17 04:10:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-17 04:10:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-17 04:10:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-17 04:10:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-17 04:10:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-17 04:10:11,313 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-11-17 04:10:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-11-17 04:10:11,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-17 04:10:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-17 04:10:11,757 INFO L236 CfgBuilder]: Building ICFG [2021-11-17 04:10:11,759 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-17 04:10:11,916 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-17 04:10:46,570 INFO L277 CfgBuilder]: Performing block encoding [2021-11-17 04:10:46,579 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-17 04:10:46,580 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-17 04:10:46,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:10:46 BoogieIcfgContainer [2021-11-17 04:10:46,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-17 04:10:46,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-17 04:10:46,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-17 04:10:46,589 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-17 04:10:46,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:10:08" (1/3) ... [2021-11-17 04:10:46,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4187f7a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:10:46, skipping insertion in model container [2021-11-17 04:10:46,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:10:10" (2/3) ... [2021-11-17 04:10:46,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4187f7a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:10:46, skipping insertion in model container [2021-11-17 04:10:46,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:10:46" (3/3) ... [2021-11-17 04:10:46,597 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-11-17 04:10:46,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-17 04:10:46,602 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-17 04:10:46,654 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-17 04:10:46,663 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 [2021-11-17 04:10:46,664 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-17 04:10:46,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2021-11-17 04:10:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-17 04:10:46,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:10:46,713 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 04:10:46,714 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:10:46,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:10:46,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1349896211, now seen corresponding path program 1 times [2021-11-17 04:10:46,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:10:46,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164554010] [2021-11-17 04:10:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:10:46,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:10:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:47,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:10:47,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:47,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:10:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:47,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:10:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:47,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:10:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 04:10:47,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:10:47,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164554010] [2021-11-17 04:10:47,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164554010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:10:47,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:10:47,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 04:10:47,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408920363] [2021-11-17 04:10:47,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:10:47,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-17 04:10:47,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:10:47,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-17 04:10:47,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 04:10:47,358 INFO L87 Difference]: Start difference. First operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 04:10:49,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:10:51,449 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:10:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:10:52,743 INFO L93 Difference]: Finished difference Result 1558 states and 2209 transitions. [2021-11-17 04:10:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 04:10:52,745 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-11-17 04:10:52,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:10:52,760 INFO L225 Difference]: With dead ends: 1558 [2021-11-17 04:10:52,760 INFO L226 Difference]: Without dead ends: 823 [2021-11-17 04:10:52,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-17 04:10:52,769 INFO L933 BasicCegarLoop]: 966 mSDtfsCounter, 471 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 445 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-17 04:10:52,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [487 Valid, 1997 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 448 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2021-11-17 04:10:52,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-11-17 04:10:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 718. [2021-11-17 04:10:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 511 states have (on average 1.3346379647749511) internal successors, (682), 529 states have internal predecessors, (682), 159 states have call successors, (159), 48 states have call predecessors, (159), 47 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-11-17 04:10:52,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 994 transitions. [2021-11-17 04:10:52,843 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 994 transitions. Word has length 39 [2021-11-17 04:10:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:10:52,843 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 994 transitions. [2021-11-17 04:10:52,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-17 04:10:52,844 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 994 transitions. [2021-11-17 04:10:52,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-17 04:10:52,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:10:52,846 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 04:10:52,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-17 04:10:52,846 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:10:52,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:10:52,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1859369301, now seen corresponding path program 1 times [2021-11-17 04:10:52,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:10:52,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536759307] [2021-11-17 04:10:52,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:10:52,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:10:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:53,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:10:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:53,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:10:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:53,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:10:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:53,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:10:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:10:53,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-17 04:10:53,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:10:53,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536759307] [2021-11-17 04:10:53,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536759307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:10:53,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:10:53,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 04:10:53,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834777834] [2021-11-17 04:10:53,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:10:53,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 04:10:53,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:10:53,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 04:10:53,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-17 04:10:53,120 INFO L87 Difference]: Start difference. First operand 718 states and 994 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-17 04:10:55,166 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:10:57,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:10:59,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:10:59,796 INFO L93 Difference]: Finished difference Result 2329 states and 3239 transitions. [2021-11-17 04:10:59,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-17 04:10:59,797 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2021-11-17 04:10:59,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:10:59,811 INFO L225 Difference]: With dead ends: 2329 [2021-11-17 04:10:59,811 INFO L226 Difference]: Without dead ends: 1619 [2021-11-17 04:10:59,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-17 04:10:59,818 INFO L933 BasicCegarLoop]: 1066 mSDtfsCounter, 1820 mSDsluCounter, 1953 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 1003 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1912 SdHoareTripleChecker+Valid, 3019 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-17 04:10:59,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1912 Valid, 3019 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 897 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-17 04:10:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-11-17 04:10:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1405. [2021-11-17 04:10:59,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3346653346653348) internal successors, (1336), 1032 states have internal predecessors, (1336), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-17 04:10:59,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1948 transitions. [2021-11-17 04:10:59,921 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1948 transitions. Word has length 39 [2021-11-17 04:10:59,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:10:59,922 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1948 transitions. [2021-11-17 04:10:59,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-17 04:10:59,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1948 transitions. [2021-11-17 04:10:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-17 04:10:59,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:10:59,932 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-17 04:10:59,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-17 04:10:59,932 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:10:59,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:10:59,933 INFO L85 PathProgramCache]: Analyzing trace with hash 950658258, now seen corresponding path program 1 times [2021-11-17 04:10:59,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:10:59,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176858521] [2021-11-17 04:10:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:10:59,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:00,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:00,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:00,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:00,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:00,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:00,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:11:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:00,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:00,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:00,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-17 04:11:00,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:00,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176858521] [2021-11-17 04:11:00,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176858521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:00,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:00,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 04:11:00,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716906363] [2021-11-17 04:11:00,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:00,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 04:11:00,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:00,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 04:11:00,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-17 04:11:00,247 INFO L87 Difference]: Start difference. First operand 1405 states and 1948 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-17 04:11:02,292 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:04,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:06,325 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:07,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:11:07,663 INFO L93 Difference]: Finished difference Result 1637 states and 2275 transitions. [2021-11-17 04:11:07,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 04:11:07,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-11-17 04:11:07,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:11:07,669 INFO L225 Difference]: With dead ends: 1637 [2021-11-17 04:11:07,669 INFO L226 Difference]: Without dead ends: 1626 [2021-11-17 04:11:07,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-17 04:11:07,671 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 1335 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 547 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-17 04:11:07,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 2479 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 609 Invalid, 3 Unknown, 0 Unchecked, 7.3s Time] [2021-11-17 04:11:07,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-11-17 04:11:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1405. [2021-11-17 04:11:07,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3336663336663337) internal successors, (1335), 1032 states have internal predecessors, (1335), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-17 04:11:07,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1947 transitions. [2021-11-17 04:11:07,710 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1947 transitions. Word has length 59 [2021-11-17 04:11:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:11:07,710 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1947 transitions. [2021-11-17 04:11:07,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-17 04:11:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1947 transitions. [2021-11-17 04:11:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-17 04:11:07,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:11:07,712 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-17 04:11:07,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-17 04:11:07,712 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:11:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:11:07,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916560, now seen corresponding path program 1 times [2021-11-17 04:11:07,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:11:07,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300723576] [2021-11-17 04:11:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:11:07,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:07,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:07,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:07,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:07,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:07,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:11:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:07,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:07,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:07,954 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-17 04:11:07,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:07,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300723576] [2021-11-17 04:11:07,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300723576] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:07,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:07,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 04:11:07,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949338323] [2021-11-17 04:11:07,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:07,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 04:11:07,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 04:11:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-17 04:11:07,957 INFO L87 Difference]: Start difference. First operand 1405 states and 1947 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 04:11:09,997 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:12,013 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:11:13,031 INFO L93 Difference]: Finished difference Result 1617 states and 2249 transitions. [2021-11-17 04:11:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-17 04:11:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 59 [2021-11-17 04:11:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:11:13,038 INFO L225 Difference]: With dead ends: 1617 [2021-11-17 04:11:13,038 INFO L226 Difference]: Without dead ends: 1614 [2021-11-17 04:11:13,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-17 04:11:13,039 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 1392 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 582 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 1938 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-17 04:11:13,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 1938 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 442 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2021-11-17 04:11:13,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-11-17 04:11:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1404. [2021-11-17 04:11:13,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1001 states have (on average 1.3326673326673326) internal successors, (1334), 1031 states have internal predecessors, (1334), 308 states have call successors, (308), 95 states have call predecessors, (308), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-17 04:11:13,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 1945 transitions. [2021-11-17 04:11:13,085 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 1945 transitions. Word has length 59 [2021-11-17 04:11:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:11:13,086 INFO L470 AbstractCegarLoop]: Abstraction has 1404 states and 1945 transitions. [2021-11-17 04:11:13,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 04:11:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 1945 transitions. [2021-11-17 04:11:13,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-17 04:11:13,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:11:13,087 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-17 04:11:13,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-17 04:11:13,088 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:11:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:11:13,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1180428650, now seen corresponding path program 1 times [2021-11-17 04:11:13,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:11:13,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371850704] [2021-11-17 04:11:13,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:11:13,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:13,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:13,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:13,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:13,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:13,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:13,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:11:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:13,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:13,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-17 04:11:13,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:13,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371850704] [2021-11-17 04:11:13,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371850704] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:13,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:13,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 04:11:13,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099674796] [2021-11-17 04:11:13,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:13,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 04:11:13,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:13,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 04:11:13,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-17 04:11:13,311 INFO L87 Difference]: Start difference. First operand 1404 states and 1945 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 04:11:15,349 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:17,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:19,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:11:19,244 INFO L93 Difference]: Finished difference Result 1616 states and 2247 transitions. [2021-11-17 04:11:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-17 04:11:19,244 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 60 [2021-11-17 04:11:19,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:11:19,251 INFO L225 Difference]: With dead ends: 1616 [2021-11-17 04:11:19,251 INFO L226 Difference]: Without dead ends: 1613 [2021-11-17 04:11:19,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-17 04:11:19,253 INFO L933 BasicCegarLoop]: 924 mSDtfsCounter, 1315 mSDsluCounter, 1494 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 541 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1389 SdHoareTripleChecker+Valid, 2418 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 541 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-11-17 04:11:19,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1389 Valid, 2418 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [541 Valid, 609 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2021-11-17 04:11:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2021-11-17 04:11:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1403. [2021-11-17 04:11:19,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1403 states, 1001 states have (on average 1.3316683316683318) internal successors, (1333), 1030 states have internal predecessors, (1333), 307 states have call successors, (307), 95 states have call predecessors, (307), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-17 04:11:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1403 states to 1403 states and 1943 transitions. [2021-11-17 04:11:19,303 INFO L78 Accepts]: Start accepts. Automaton has 1403 states and 1943 transitions. Word has length 60 [2021-11-17 04:11:19,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:11:19,305 INFO L470 AbstractCegarLoop]: Abstraction has 1403 states and 1943 transitions. [2021-11-17 04:11:19,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 04:11:19,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1403 states and 1943 transitions. [2021-11-17 04:11:19,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-17 04:11:19,306 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:11:19,306 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-17 04:11:19,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-17 04:11:19,306 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:11:19,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:11:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash -2061626285, now seen corresponding path program 1 times [2021-11-17 04:11:19,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:11:19,307 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774981880] [2021-11-17 04:11:19,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:11:19,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:19,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:19,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:19,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:19,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:19,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:11:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:19,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-17 04:11:19,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:19,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774981880] [2021-11-17 04:11:19,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774981880] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:19,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:19,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 04:11:19,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062528726] [2021-11-17 04:11:19,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:19,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 04:11:19,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 04:11:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-17 04:11:19,529 INFO L87 Difference]: Start difference. First operand 1403 states and 1943 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 04:11:21,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:11:22,948 INFO L93 Difference]: Finished difference Result 1615 states and 2245 transitions. [2021-11-17 04:11:22,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-17 04:11:22,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 61 [2021-11-17 04:11:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:11:22,958 INFO L225 Difference]: With dead ends: 1615 [2021-11-17 04:11:22,958 INFO L226 Difference]: Without dead ends: 1612 [2021-11-17 04:11:22,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-17 04:11:22,961 INFO L933 BasicCegarLoop]: 921 mSDtfsCounter, 1388 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 581 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1462 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 581 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-17 04:11:22,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1462 Valid, 1931 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [581 Valid, 445 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-17 04:11:22,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-11-17 04:11:23,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1402. [2021-11-17 04:11:23,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1402 states, 1001 states have (on average 1.3306693306693307) internal successors, (1332), 1029 states have internal predecessors, (1332), 306 states have call successors, (306), 95 states have call predecessors, (306), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-11-17 04:11:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1402 states to 1402 states and 1941 transitions. [2021-11-17 04:11:23,032 INFO L78 Accepts]: Start accepts. Automaton has 1402 states and 1941 transitions. Word has length 61 [2021-11-17 04:11:23,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:11:23,033 INFO L470 AbstractCegarLoop]: Abstraction has 1402 states and 1941 transitions. [2021-11-17 04:11:23,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 3 states have internal predecessors, (37), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 04:11:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1402 states and 1941 transitions. [2021-11-17 04:11:23,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-17 04:11:23,035 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:11:23,035 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-17 04:11:23,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-17 04:11:23,036 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:11:23,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:11:23,036 INFO L85 PathProgramCache]: Analyzing trace with hash 513890701, now seen corresponding path program 1 times [2021-11-17 04:11:23,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:11:23,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53388809] [2021-11-17 04:11:23,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:11:23,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:23,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:23,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:23,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:23,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:11:23,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:23,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:23,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:23,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:23,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-17 04:11:23,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:23,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53388809] [2021-11-17 04:11:23,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53388809] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:23,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:23,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-17 04:11:23,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182150216] [2021-11-17 04:11:23,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:23,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-17 04:11:23,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:23,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-17 04:11:23,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-17 04:11:23,421 INFO L87 Difference]: Start difference. First operand 1402 states and 1941 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 04:11:25,489 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:27,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:11:30,086 INFO L93 Difference]: Finished difference Result 4572 states and 6368 transitions. [2021-11-17 04:11:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-17 04:11:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 62 [2021-11-17 04:11:30,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:11:30,099 INFO L225 Difference]: With dead ends: 4572 [2021-11-17 04:11:30,099 INFO L226 Difference]: Without dead ends: 3180 [2021-11-17 04:11:30,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-17 04:11:30,104 INFO L933 BasicCegarLoop]: 1076 mSDtfsCounter, 1689 mSDsluCounter, 2498 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 935 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1780 SdHoareTripleChecker+Valid, 3574 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-17 04:11:30,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1780 Valid, 3574 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1113 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-17 04:11:30,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3180 states. [2021-11-17 04:11:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3180 to 2755. [2021-11-17 04:11:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 1965 states have (on average 1.3338422391857507) internal successors, (2621), 2019 states have internal predecessors, (2621), 605 states have call successors, (605), 187 states have call predecessors, (605), 184 states have return successors, (602), 600 states have call predecessors, (602), 602 states have call successors, (602) [2021-11-17 04:11:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 3828 transitions. [2021-11-17 04:11:30,183 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 3828 transitions. Word has length 62 [2021-11-17 04:11:30,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:11:30,184 INFO L470 AbstractCegarLoop]: Abstraction has 2755 states and 3828 transitions. [2021-11-17 04:11:30,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 04:11:30,184 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 3828 transitions. [2021-11-17 04:11:30,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-17 04:11:30,186 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:11:30,186 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-17 04:11:30,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-17 04:11:30,186 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:11:30,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:11:30,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1643939959, now seen corresponding path program 1 times [2021-11-17 04:11:30,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:11:30,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271342487] [2021-11-17 04:11:30,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:11:30,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:30,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-11-17 04:11:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-11-17 04:11:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-17 04:11:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-11-17 04:11:30,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-17 04:11:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-11-17 04:11:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-17 04:11:30,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-17 04:11:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-17 04:11:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-17 04:11:30,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:30,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271342487] [2021-11-17 04:11:30,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271342487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:30,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:30,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-17 04:11:30,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418821445] [2021-11-17 04:11:30,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:30,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-17 04:11:30,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-17 04:11:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-17 04:11:30,453 INFO L87 Difference]: Start difference. First operand 2755 states and 3828 transitions. Second operand has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-17 04:11:32,490 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:34,504 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:35,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:11:35,665 INFO L93 Difference]: Finished difference Result 6206 states and 8670 transitions. [2021-11-17 04:11:35,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-17 04:11:35,666 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 104 [2021-11-17 04:11:35,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:11:35,678 INFO L225 Difference]: With dead ends: 6206 [2021-11-17 04:11:35,678 INFO L226 Difference]: Without dead ends: 3469 [2021-11-17 04:11:35,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-17 04:11:35,685 INFO L933 BasicCegarLoop]: 953 mSDtfsCounter, 747 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 680 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 2893 SdHoareTripleChecker+Invalid, 1405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-17 04:11:35,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [777 Valid, 2893 Invalid, 1405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 723 Invalid, 2 Unknown, 0 Unchecked, 5.1s Time] [2021-11-17 04:11:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-11-17 04:11:35,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2813. [2021-11-17 04:11:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2813 states, 2021 states have (on average 1.335477486392875) internal successors, (2699), 2075 states have internal predecessors, (2699), 605 states have call successors, (605), 189 states have call predecessors, (605), 186 states have return successors, (602), 600 states have call predecessors, (602), 602 states have call successors, (602) [2021-11-17 04:11:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 3906 transitions. [2021-11-17 04:11:35,768 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 3906 transitions. Word has length 104 [2021-11-17 04:11:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:11:35,768 INFO L470 AbstractCegarLoop]: Abstraction has 2813 states and 3906 transitions. [2021-11-17 04:11:35,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.285714285714286) internal successors, (65), 3 states have internal predecessors, (65), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-17 04:11:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 3906 transitions. [2021-11-17 04:11:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-17 04:11:35,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:11:35,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 04:11:35,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-17 04:11:35,771 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:11:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:11:35,771 INFO L85 PathProgramCache]: Analyzing trace with hash -832428614, now seen corresponding path program 1 times [2021-11-17 04:11:35,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:11:35,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383946670] [2021-11-17 04:11:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:11:35,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:35,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:35,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:35,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:35,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:35,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:11:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:35,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:35,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:35,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-17 04:11:35,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-17 04:11:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-17 04:11:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-17 04:11:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-17 04:11:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-17 04:11:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-17 04:11:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-17 04:11:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-17 04:11:36,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-17 04:11:36,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:36,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383946670] [2021-11-17 04:11:36,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383946670] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:36,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:36,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-17 04:11:36,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601316030] [2021-11-17 04:11:36,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:36,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-17 04:11:36,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-17 04:11:36,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-17 04:11:36,050 INFO L87 Difference]: Start difference. First operand 2813 states and 3906 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-17 04:11:38,088 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:40,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:11:41,399 INFO L93 Difference]: Finished difference Result 6780 states and 9559 transitions. [2021-11-17 04:11:41,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 04:11:41,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 133 [2021-11-17 04:11:41,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:11:41,414 INFO L225 Difference]: With dead ends: 6780 [2021-11-17 04:11:41,414 INFO L226 Difference]: Without dead ends: 3993 [2021-11-17 04:11:41,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-17 04:11:41,421 INFO L933 BasicCegarLoop]: 1137 mSDtfsCounter, 987 mSDsluCounter, 2218 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 842 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 3355 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-17 04:11:41,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1041 Valid, 3355 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 706 Invalid, 2 Unknown, 0 Unchecked, 5.2s Time] [2021-11-17 04:11:41,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-11-17 04:11:41,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 2825. [2021-11-17 04:11:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2033 states have (on average 1.3334972946384653) internal successors, (2711), 2087 states have internal predecessors, (2711), 605 states have call successors, (605), 189 states have call predecessors, (605), 186 states have return successors, (602), 600 states have call predecessors, (602), 602 states have call successors, (602) [2021-11-17 04:11:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 3918 transitions. [2021-11-17 04:11:41,514 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 3918 transitions. Word has length 133 [2021-11-17 04:11:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:11:41,514 INFO L470 AbstractCegarLoop]: Abstraction has 2825 states and 3918 transitions. [2021-11-17 04:11:41,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2021-11-17 04:11:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 3918 transitions. [2021-11-17 04:11:41,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-17 04:11:41,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:11:41,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 04:11:41,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-17 04:11:41,519 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:11:41,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:11:41,520 INFO L85 PathProgramCache]: Analyzing trace with hash -780408024, now seen corresponding path program 1 times [2021-11-17 04:11:41,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:11:41,520 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461646160] [2021-11-17 04:11:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:11:41,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:41,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:11:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:41,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-17 04:11:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-17 04:11:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-17 04:11:41,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-17 04:11:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-17 04:11:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-17 04:11:41,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-17 04:11:41,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-17 04:11:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-17 04:11:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:41,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-17 04:11:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-17 04:11:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-17 04:11:41,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:41,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461646160] [2021-11-17 04:11:41,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461646160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:41,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:41,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-17 04:11:41,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25543109] [2021-11-17 04:11:41,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:41,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 04:11:41,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:41,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 04:11:41,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-17 04:11:41,808 INFO L87 Difference]: Start difference. First operand 2825 states and 3918 transitions. Second operand has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (18), 7 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-17 04:11:43,845 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:45,865 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:47,886 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:49,905 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:11:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:11:55,573 INFO L93 Difference]: Finished difference Result 6269 states and 8750 transitions. [2021-11-17 04:11:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-17 04:11:55,574 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (18), 7 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) Word has length 149 [2021-11-17 04:11:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:11:55,609 INFO L225 Difference]: With dead ends: 6269 [2021-11-17 04:11:55,609 INFO L226 Difference]: Without dead ends: 3470 [2021-11-17 04:11:55,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-11-17 04:11:55,617 INFO L933 BasicCegarLoop]: 1588 mSDtfsCounter, 2029 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 3694 mSolverCounterSat, 1644 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2160 SdHoareTripleChecker+Valid, 2651 SdHoareTripleChecker+Invalid, 5342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1644 IncrementalHoareTripleChecker+Valid, 3694 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2021-11-17 04:11:55,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2160 Valid, 2651 Invalid, 5342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1644 Valid, 3694 Invalid, 4 Unknown, 0 Unchecked, 13.3s Time] [2021-11-17 04:11:55,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3470 states. [2021-11-17 04:11:55,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3470 to 2822. [2021-11-17 04:11:55,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2822 states, 2031 states have (on average 1.3318562284588873) internal successors, (2705), 2085 states have internal predecessors, (2705), 604 states have call successors, (604), 188 states have call predecessors, (604), 186 states have return successors, (600), 600 states have call predecessors, (600), 600 states have call successors, (600) [2021-11-17 04:11:55,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 3909 transitions. [2021-11-17 04:11:55,729 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 3909 transitions. Word has length 149 [2021-11-17 04:11:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:11:55,729 INFO L470 AbstractCegarLoop]: Abstraction has 2822 states and 3909 transitions. [2021-11-17 04:11:55,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.25) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (18), 7 states have call predecessors, (18), 2 states have return successors, (17), 2 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-17 04:11:55,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 3909 transitions. [2021-11-17 04:11:55,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-17 04:11:55,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:11:55,733 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-17 04:11:55,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-17 04:11:55,734 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:11:55,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:11:55,734 INFO L85 PathProgramCache]: Analyzing trace with hash 130040048, now seen corresponding path program 1 times [2021-11-17 04:11:55,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:11:55,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915904271] [2021-11-17 04:11:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:11:55,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:11:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:55,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:11:55,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:55,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:11:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:11:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:11:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-17 04:11:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-17 04:11:56,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-17 04:11:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-17 04:11:56,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-17 04:11:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-17 04:11:56,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-17 04:11:56,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-17 04:11:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-17 04:11:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-17 04:11:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-17 04:11:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:11:56,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:11:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-17 04:11:56,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:11:56,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915904271] [2021-11-17 04:11:56,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915904271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:11:56,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:11:56,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-17 04:11:56,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168496217] [2021-11-17 04:11:56,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:11:56,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-17 04:11:56,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:11:56,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-17 04:11:56,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-17 04:11:56,179 INFO L87 Difference]: Start difference. First operand 2822 states and 3909 transitions. Second operand has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-17 04:11:58,224 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:00,239 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:02,246 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:05,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:12:05,008 INFO L93 Difference]: Finished difference Result 7589 states and 10796 transitions. [2021-11-17 04:12:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-17 04:12:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) Word has length 154 [2021-11-17 04:12:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:12:05,040 INFO L225 Difference]: With dead ends: 7589 [2021-11-17 04:12:05,040 INFO L226 Difference]: Without dead ends: 4793 [2021-11-17 04:12:05,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-11-17 04:12:05,052 INFO L933 BasicCegarLoop]: 1324 mSDtfsCounter, 1259 mSDsluCounter, 9083 mSDsCounter, 0 mSdLazyCounter, 2255 mSolverCounterSat, 611 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 10407 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 611 IncrementalHoareTripleChecker+Valid, 2255 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-17 04:12:05,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 10407 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [611 Valid, 2255 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2021-11-17 04:12:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4793 states. [2021-11-17 04:12:05,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4793 to 2819. [2021-11-17 04:12:05,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2029 states have (on average 1.3302119270576638) internal successors, (2699), 2082 states have internal predecessors, (2699), 603 states have call successors, (603), 188 states have call predecessors, (603), 186 states have return successors, (600), 600 states have call predecessors, (600), 600 states have call successors, (600) [2021-11-17 04:12:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3902 transitions. [2021-11-17 04:12:05,281 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3902 transitions. Word has length 154 [2021-11-17 04:12:05,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:12:05,281 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 3902 transitions. [2021-11-17 04:12:05,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.583333333333333) internal successors, (91), 7 states have internal predecessors, (91), 2 states have call successors, (19), 6 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 1 states have call successors, (18) [2021-11-17 04:12:05,282 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3902 transitions. [2021-11-17 04:12:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-17 04:12:05,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:12:05,288 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-17 04:12:05,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-17 04:12:05,288 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:12:05,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:12:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1003086829, now seen corresponding path program 1 times [2021-11-17 04:12:05,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:12:05,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308405387] [2021-11-17 04:12:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:12:05,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:12:05,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:12:05,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:12:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:12:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:12:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:12:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:12:05,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:12:05,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-17 04:12:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-17 04:12:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-17 04:12:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-17 04:12:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-17 04:12:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-17 04:12:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-17 04:12:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-17 04:12:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-17 04:12:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:12:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-17 04:12:05,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-17 04:12:05,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2021-11-17 04:12:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-17 04:12:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-11-17 04:12:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-17 04:12:05,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:12:05,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308405387] [2021-11-17 04:12:05,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308405387] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:12:05,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:12:05,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-17 04:12:05,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200533272] [2021-11-17 04:12:05,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:12:05,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-17 04:12:05,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:12:05,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-17 04:12:05,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-17 04:12:05,698 INFO L87 Difference]: Start difference. First operand 2819 states and 3902 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-17 04:12:07,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:09,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:11,762 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:13,781 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:17,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:12:17,573 INFO L93 Difference]: Finished difference Result 6442 states and 9243 transitions. [2021-11-17 04:12:17,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-17 04:12:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 184 [2021-11-17 04:12:17,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:12:17,607 INFO L225 Difference]: With dead ends: 6442 [2021-11-17 04:12:17,608 INFO L226 Difference]: Without dead ends: 5057 [2021-11-17 04:12:17,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-11-17 04:12:17,612 INFO L933 BasicCegarLoop]: 1120 mSDtfsCounter, 1879 mSDsluCounter, 2946 mSDsCounter, 0 mSdLazyCounter, 4331 mSolverCounterSat, 953 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2007 SdHoareTripleChecker+Valid, 4066 SdHoareTripleChecker+Invalid, 5288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 953 IncrementalHoareTripleChecker+Valid, 4331 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-17 04:12:17,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2007 Valid, 4066 Invalid, 5288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [953 Valid, 4331 Invalid, 4 Unknown, 0 Unchecked, 11.6s Time] [2021-11-17 04:12:17,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5057 states. [2021-11-17 04:12:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5057 to 2819. [2021-11-17 04:12:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2819 states, 2029 states have (on average 1.3292262198127156) internal successors, (2697), 2082 states have internal predecessors, (2697), 603 states have call successors, (603), 188 states have call predecessors, (603), 186 states have return successors, (600), 600 states have call predecessors, (600), 600 states have call successors, (600) [2021-11-17 04:12:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2819 states to 2819 states and 3900 transitions. [2021-11-17 04:12:17,764 INFO L78 Accepts]: Start accepts. Automaton has 2819 states and 3900 transitions. Word has length 184 [2021-11-17 04:12:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:12:17,764 INFO L470 AbstractCegarLoop]: Abstraction has 2819 states and 3900 transitions. [2021-11-17 04:12:17,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-17 04:12:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2819 states and 3900 transitions. [2021-11-17 04:12:17,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-17 04:12:17,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 04:12:17,770 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-17 04:12:17,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-17 04:12:17,770 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 04:12:17,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 04:12:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash 176585654, now seen corresponding path program 1 times [2021-11-17 04:12:17,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 04:12:17,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267805594] [2021-11-17 04:12:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 04:12:17,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 04:12:17,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:17,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 04:12:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:17,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:12:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:17,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:12:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-11-17 04:12:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-17 04:12:18,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:12:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-11-17 04:12:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-11-17 04:12:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-17 04:12:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-11-17 04:12:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-17 04:12:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-17 04:12:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-17 04:12:18,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-17 04:12:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-17 04:12:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-17 04:12:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 04:12:18,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2021-11-17 04:12:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-11-17 04:12:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2021-11-17 04:12:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2021-11-17 04:12:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2021-11-17 04:12:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 04:12:18,142 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-17 04:12:18,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 04:12:18,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267805594] [2021-11-17 04:12:18,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267805594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 04:12:18,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 04:12:18,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-17 04:12:18,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459288104] [2021-11-17 04:12:18,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 04:12:18,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 04:12:18,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 04:12:18,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 04:12:18,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-17 04:12:18,144 INFO L87 Difference]: Start difference. First operand 2819 states and 3900 transitions. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-17 04:12:20,186 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:22,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:24,230 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 04:12:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 04:12:26,660 INFO L93 Difference]: Finished difference Result 3402 states and 4778 transitions. [2021-11-17 04:12:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-17 04:12:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) Word has length 189 [2021-11-17 04:12:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 04:12:26,661 INFO L225 Difference]: With dead ends: 3402 [2021-11-17 04:12:26,661 INFO L226 Difference]: Without dead ends: 0 [2021-11-17 04:12:26,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-17 04:12:26,672 INFO L933 BasicCegarLoop]: 1011 mSDtfsCounter, 1538 mSDsluCounter, 1217 mSDsCounter, 0 mSdLazyCounter, 2085 mSolverCounterSat, 1130 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 3218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 2085 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-17 04:12:26,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1667 Valid, 2228 Invalid, 3218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 2085 Invalid, 3 Unknown, 0 Unchecked, 8.3s Time] [2021-11-17 04:12:26,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-17 04:12:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-17 04:12:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-17 04:12:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-17 04:12:26,675 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2021-11-17 04:12:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 04:12:26,675 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-17 04:12:26,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (21), 7 states have call predecessors, (21), 1 states have return successors, (20), 3 states have call predecessors, (20), 3 states have call successors, (20) [2021-11-17 04:12:26,675 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-17 04:12:26,675 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-17 04:12:26,677 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-17 04:12:26,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-17 04:12:26,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. Killed by 15