./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-17 01:18:46,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-17 01:18:46,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-17 01:18:46,729 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-17 01:18:46,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-17 01:18:46,733 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-17 01:18:46,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-17 01:18:46,737 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-17 01:18:46,738 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-17 01:18:46,743 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-17 01:18:46,744 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-17 01:18:46,744 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-17 01:18:46,745 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-17 01:18:46,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-17 01:18:46,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-17 01:18:46,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-17 01:18:46,754 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-17 01:18:46,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-17 01:18:46,756 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-17 01:18:46,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-17 01:18:46,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-17 01:18:46,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-17 01:18:46,762 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-17 01:18:46,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-17 01:18:46,767 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-17 01:18:46,768 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-17 01:18:46,768 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-17 01:18:46,769 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-17 01:18:46,770 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-17 01:18:46,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-17 01:18:46,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-17 01:18:46,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-17 01:18:46,772 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-17 01:18:46,773 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-17 01:18:46,774 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-17 01:18:46,774 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-17 01:18:46,775 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-17 01:18:46,775 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-17 01:18:46,775 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-17 01:18:46,776 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-17 01:18:46,776 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-17 01:18:46,777 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-17 01:18:46,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-17 01:18:46,804 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-17 01:18:46,805 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-17 01:18:46,805 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-17 01:18:46,805 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-17 01:18:46,806 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-17 01:18:46,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-17 01:18:46,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-17 01:18:46,806 INFO L138 SettingsManager]: * Use SBE=true [2021-11-17 01:18:46,806 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-17 01:18:46,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-17 01:18:46,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-17 01:18:46,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-17 01:18:46,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-17 01:18:46,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-17 01:18:46,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-17 01:18:46,808 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-17 01:18:46,808 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-17 01:18:46,808 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-17 01:18:46,808 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-17 01:18:46,808 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-17 01:18:46,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 01:18:46,809 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-17 01:18:46,809 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-17 01:18:46,809 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-17 01:18:46,809 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-17 01:18:46,809 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-17 01:18:46,809 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-17 01:18:46,810 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-17 01:18:46,810 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-17 01:18:46,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-17 01:18:46,810 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dac564b3c3a3d92c70c6b64cab263655f73325d953da5e99709a7250df803cc8 [2021-11-17 01:18:47,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-17 01:18:47,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-17 01:18:47,019 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-17 01:18:47,020 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-17 01:18:47,021 INFO L275 PluginConnector]: CDTParser initialized [2021-11-17 01:18:47,022 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-11-17 01:18:47,070 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39cbd47da/3a77424ea6304c96839442b6134ddfb9/FLAG11d61094a [2021-11-17 01:18:47,707 INFO L306 CDTParser]: Found 1 translation units. [2021-11-17 01:18:47,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-11-17 01:18:47,751 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39cbd47da/3a77424ea6304c96839442b6134ddfb9/FLAG11d61094a [2021-11-17 01:18:48,098 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39cbd47da/3a77424ea6304c96839442b6134ddfb9 [2021-11-17 01:18:48,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-17 01:18:48,101 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-17 01:18:48,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-17 01:18:48,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-17 01:18:48,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-17 01:18:48,104 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 01:18:48" (1/1) ... [2021-11-17 01:18:48,105 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@483b0d1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:48, skipping insertion in model container [2021-11-17 01:18:48,105 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 01:18:48" (1/1) ... [2021-11-17 01:18:48,110 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-17 01:18:48,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-17 01:18:48,623 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2021-11-17 01:18:48,623 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2021-11-17 01:18:48,798 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2021-11-17 01:18:49,462 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 01:18:49,492 INFO L203 MainTranslator]: Completed pre-run [2021-11-17 01:18:49,601 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name show at C: (*show)(struct kobject___0 * , struct attribute___0 * , char * ) [6069] [2021-11-17 01:18:49,602 WARN L1244 CHandler]: Detected problem Invalid redeclaration of the name store at C: (*store)(struct kobject___0 * , struct attribute___0 * , char const * , size_t ) [6070-6071] [2021-11-17 01:18:49,638 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i[181805,181818] [2021-11-17 01:18:49,811 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-17 01:18:49,851 INFO L208 MainTranslator]: Completed translation [2021-11-17 01:18:49,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49 WrapperNode [2021-11-17 01:18:49,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-17 01:18:49,852 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-17 01:18:49,853 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-17 01:18:49,853 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-17 01:18:49,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:49,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:49,989 INFO L137 Inliner]: procedures = 202, calls = 1968, calls flagged for inlining = 83, calls inlined = 44, statements flattened = 2072 [2021-11-17 01:18:49,989 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-17 01:18:49,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-17 01:18:49,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-17 01:18:49,990 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-17 01:18:49,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:49,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:50,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:50,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:50,046 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:50,053 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:50,062 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:50,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-17 01:18:50,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-17 01:18:50,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-17 01:18:50,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-17 01:18:50,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (1/1) ... [2021-11-17 01:18:50,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-17 01:18:50,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 01:18:50,115 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 01:18:50,122 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 01:18:50,144 INFO L130 BoogieDeclarations]: Found specification of procedure write_reg [2021-11-17 01:18:50,144 INFO L138 BoogieDeclarations]: Found implementation of procedure write_reg [2021-11-17 01:18:50,145 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-17 01:18:50,145 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-17 01:18:50,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-17 01:18:50,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-17 01:18:50,145 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-17 01:18:50,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-17 01:18:50,145 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-17 01:18:50,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-17 01:18:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-17 01:18:50,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-17 01:18:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-17 01:18:50,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-17 01:18:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-17 01:18:50,146 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-17 01:18:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_probe [2021-11-17 01:18:50,147 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_probe [2021-11-17 01:18:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-17 01:18:50,147 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-17 01:18:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-17 01:18:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-17 01:18:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-17 01:18:50,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-17 01:18:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-17 01:18:50,148 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-17 01:18:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure ctrl_start_transfer [2021-11-17 01:18:50,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ctrl_start_transfer [2021-11-17 01:18:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-17 01:18:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-17 01:18:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-17 01:18:50,148 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-17 01:18:50,148 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-17 01:18:50,149 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-17 01:18:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock [2021-11-17 01:18:50,149 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock [2021-11-17 01:18:50,149 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-17 01:18:50,150 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-17 01:18:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-17 01:18:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-17 01:18:50,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-17 01:18:50,150 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freebchannel [2021-11-17 01:18:50,150 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freebchannel [2021-11-17 01:18:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_freedchannel [2021-11-17 01:18:50,151 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_freedchannel [2021-11-17 01:18:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-17 01:18:50,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-17 01:18:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-17 01:18:50,151 INFO L130 BoogieDeclarations]: Found specification of procedure handle_led [2021-11-17 01:18:50,151 INFO L138 BoogieDeclarations]: Found implementation of procedure handle_led [2021-11-17 01:18:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure mISDN_initdchannel [2021-11-17 01:18:50,152 INFO L138 BoogieDeclarations]: Found implementation of procedure mISDN_initdchannel [2021-11-17 01:18:50,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-17 01:18:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-17 01:18:50,153 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-17 01:18:50,153 INFO L130 BoogieDeclarations]: Found specification of procedure stop_iso_gracefull [2021-11-17 01:18:50,154 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_iso_gracefull [2021-11-17 01:18:50,154 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-17 01:18:50,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-17 01:18:50,154 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-17 01:18:50,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-17 01:18:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-17 01:18:50,155 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-17 01:18:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-17 01:18:50,155 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2021-11-17 01:18:50,155 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2021-11-17 01:18:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-17 01:18:50,156 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-17 01:18:50,156 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-17 01:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-17 01:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure set_led_bit [2021-11-17 01:18:50,157 INFO L138 BoogieDeclarations]: Found implementation of procedure set_led_bit [2021-11-17 01:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-17 01:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure l1_event [2021-11-17 01:18:50,157 INFO L138 BoogieDeclarations]: Found implementation of procedure l1_event [2021-11-17 01:18:50,157 INFO L130 BoogieDeclarations]: Found specification of procedure hfcsusb_stop_endpoint [2021-11-17 01:18:50,157 INFO L138 BoogieDeclarations]: Found implementation of procedure hfcsusb_stop_endpoint [2021-11-17 01:18:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock [2021-11-17 01:18:50,158 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock [2021-11-17 01:18:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-17 01:18:50,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-17 01:18:50,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-17 01:18:50,508 INFO L236 CfgBuilder]: Building ICFG [2021-11-17 01:18:50,511 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-17 01:18:50,760 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-17 01:18:54,416 INFO L277 CfgBuilder]: Performing block encoding [2021-11-17 01:18:54,427 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-17 01:18:54,428 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-17 01:18:54,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 01:18:54 BoogieIcfgContainer [2021-11-17 01:18:54,429 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-17 01:18:54,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-17 01:18:54,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-17 01:18:54,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-17 01:18:54,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 01:18:48" (1/3) ... [2021-11-17 01:18:54,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6187b981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 01:18:54, skipping insertion in model container [2021-11-17 01:18:54,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 01:18:49" (2/3) ... [2021-11-17 01:18:54,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6187b981 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 01:18:54, skipping insertion in model container [2021-11-17 01:18:54,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 01:18:54" (3/3) ... [2021-11-17 01:18:54,439 INFO L111 eAbstractionObserver]: Analyzing ICFG 43_2a_consumption_linux-3.16-rc1.tar.xz-43_2a-drivers--isdn--hardware--mISDN--hfcsusb.ko-entry_point.cil.out.i [2021-11-17 01:18:54,442 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-17 01:18:54,445 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-17 01:18:54,489 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-17 01:18:54,498 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 01:18:54,498 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-17 01:18:54,528 INFO L276 IsEmpty]: Start isEmpty. Operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-17 01:18:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-17 01:18:54,537 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:18:54,538 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:18:54,538 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:18:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:18:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2015975527, now seen corresponding path program 1 times [2021-11-17 01:18:54,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:18:54,548 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044857105] [2021-11-17 01:18:54,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:18:54,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:18:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:18:54,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:18:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:18:54,965 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 01:18:54,965 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:18:54,966 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044857105] [2021-11-17 01:18:54,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044857105] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:18:54,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:18:54,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 01:18:54,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758636375] [2021-11-17 01:18:54,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:18:54,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 01:18:54,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:18:55,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 01:18:55,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 01:18:55,008 INFO L87 Difference]: Start difference. First operand has 502 states, 373 states have (on average 1.353887399463807) internal successors, (505), 382 states have internal predecessors, (505), 95 states have call successors, (95), 33 states have call predecessors, (95), 32 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-17 01:18:58,254 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 01:18:58,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:18:58,368 INFO L93 Difference]: Finished difference Result 1083 states and 1544 transitions. [2021-11-17 01:18:58,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-17 01:18:58,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-17 01:18:58,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:18:58,382 INFO L225 Difference]: With dead ends: 1083 [2021-11-17 01:18:58,382 INFO L226 Difference]: Without dead ends: 563 [2021-11-17 01:18:58,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-17 01:18:58,391 INFO L933 BasicCegarLoop]: 641 mSDtfsCounter, 216 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-17 01:18:58,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 1343 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 502 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-17 01:18:58,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-11-17 01:18:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 512. [2021-11-17 01:18:58,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 385 states have (on average 1.3428571428571427) internal successors, (517), 389 states have internal predecessors, (517), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-17 01:18:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 702 transitions. [2021-11-17 01:18:58,502 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 702 transitions. Word has length 30 [2021-11-17 01:18:58,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:18:58,503 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 702 transitions. [2021-11-17 01:18:58,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-17 01:18:58,503 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 702 transitions. [2021-11-17 01:18:58,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-17 01:18:58,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:18:58,510 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:18:58,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-17 01:18:58,510 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:18:58,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:18:58,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1592596621, now seen corresponding path program 1 times [2021-11-17 01:18:58,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:18:58,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878946687] [2021-11-17 01:18:58,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:18:58,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:18:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:18:58,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:18:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:18:58,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:18:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:18:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-17 01:18:58,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:18:58,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878946687] [2021-11-17 01:18:58,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878946687] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:18:58,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:18:58,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 01:18:58,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821149598] [2021-11-17 01:18:58,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:18:58,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 01:18:58,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:18:58,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 01:18:58,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 01:18:58,707 INFO L87 Difference]: Start difference. First operand 512 states and 702 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 01:19:01,911 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 01:19:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:02,014 INFO L93 Difference]: Finished difference Result 1067 states and 1492 transitions. [2021-11-17 01:19:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 01:19:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-11-17 01:19:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:02,021 INFO L225 Difference]: With dead ends: 1067 [2021-11-17 01:19:02,021 INFO L226 Difference]: Without dead ends: 571 [2021-11-17 01:19:02,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 01:19:02,025 INFO L933 BasicCegarLoop]: 625 mSDtfsCounter, 173 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 100 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1314 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:02,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 1314 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 495 Invalid, 1 Unknown, 0 Unchecked, 3.3s Time] [2021-11-17 01:19:02,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-11-17 01:19:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 519. [2021-11-17 01:19:02,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 392 states have (on average 1.344387755102041) internal successors, (527), 396 states have internal predecessors, (527), 93 states have call successors, (93), 34 states have call predecessors, (93), 33 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-11-17 01:19:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 712 transitions. [2021-11-17 01:19:02,059 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 712 transitions. Word has length 49 [2021-11-17 01:19:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:02,060 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 712 transitions. [2021-11-17 01:19:02,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 01:19:02,060 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 712 transitions. [2021-11-17 01:19:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-17 01:19:02,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:02,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:02,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-17 01:19:02,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash -725279773, now seen corresponding path program 1 times [2021-11-17 01:19:02,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:02,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606751667] [2021-11-17 01:19:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:02,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:02,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:02,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:02,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:02,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-17 01:19:02,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:02,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606751667] [2021-11-17 01:19:02,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606751667] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:19:02,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:19:02,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-17 01:19:02,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586515227] [2021-11-17 01:19:02,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:19:02,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-17 01:19:02,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:02,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-17 01:19:02,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 01:19:02,216 INFO L87 Difference]: Start difference. First operand 519 states and 712 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 01:19:05,364 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 01:19:05,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:05,467 INFO L93 Difference]: Finished difference Result 1115 states and 1567 transitions. [2021-11-17 01:19:05,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-17 01:19:05,467 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2021-11-17 01:19:05,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:05,471 INFO L225 Difference]: With dead ends: 1115 [2021-11-17 01:19:05,471 INFO L226 Difference]: Without dead ends: 612 [2021-11-17 01:19:05,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-17 01:19:05,473 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 222 mSDsluCounter, 689 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 102 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:05,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 1315 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 501 Invalid, 1 Unknown, 0 Unchecked, 3.2s Time] [2021-11-17 01:19:05,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-11-17 01:19:05,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 560. [2021-11-17 01:19:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 431 states have (on average 1.359628770301624) internal successors, (586), 435 states have internal predecessors, (586), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-17 01:19:05,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 775 transitions. [2021-11-17 01:19:05,506 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 775 transitions. Word has length 55 [2021-11-17 01:19:05,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:05,507 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 775 transitions. [2021-11-17 01:19:05,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-17 01:19:05,508 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 775 transitions. [2021-11-17 01:19:05,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-17 01:19:05,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:05,515 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:05,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-17 01:19:05,515 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:05,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:05,516 INFO L85 PathProgramCache]: Analyzing trace with hash -232463337, now seen corresponding path program 1 times [2021-11-17 01:19:05,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:05,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146325883] [2021-11-17 01:19:05,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:05,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:05,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:05,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:05,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:05,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-17 01:19:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:05,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-17 01:19:05,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:05,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146325883] [2021-11-17 01:19:05,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146325883] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:19:05,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:19:05,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 01:19:05,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32502155] [2021-11-17 01:19:05,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:19:05,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-17 01:19:05,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:05,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-17 01:19:05,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-17 01:19:05,681 INFO L87 Difference]: Start difference. First operand 560 states and 775 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 01:19:09,868 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:19:11,896 WARN L515 Checker$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 01:19:14,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:19:16,037 WARN L515 Checker$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 01:19:16,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:16,193 INFO L93 Difference]: Finished difference Result 1531 states and 2229 transitions. [2021-11-17 01:19:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 01:19:16,194 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 78 [2021-11-17 01:19:16,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:16,198 INFO L225 Difference]: With dead ends: 1531 [2021-11-17 01:19:16,199 INFO L226 Difference]: Without dead ends: 987 [2021-11-17 01:19:16,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-17 01:19:16,201 INFO L933 BasicCegarLoop]: 636 mSDtfsCounter, 701 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 346 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:16,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 1545 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 935 Invalid, 4 Unknown, 0 Unchecked, 10.4s Time] [2021-11-17 01:19:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-11-17 01:19:16,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 562. [2021-11-17 01:19:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 433 states have (on average 1.3579676674364896) internal successors, (588), 437 states have internal predecessors, (588), 95 states have call successors, (95), 34 states have call predecessors, (95), 33 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2021-11-17 01:19:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 777 transitions. [2021-11-17 01:19:16,224 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 777 transitions. Word has length 78 [2021-11-17 01:19:16,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:16,224 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 777 transitions. [2021-11-17 01:19:16,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 3 states have internal predecessors, (63), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 01:19:16,225 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 777 transitions. [2021-11-17 01:19:16,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-17 01:19:16,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:16,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:16,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-17 01:19:16,227 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:16,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:16,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1595880674, now seen corresponding path program 1 times [2021-11-17 01:19:16,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:16,227 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914763877] [2021-11-17 01:19:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:16,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:16,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:16,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:16,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:16,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-17 01:19:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:16,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:19:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-17 01:19:16,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:16,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914763877] [2021-11-17 01:19:16,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914763877] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:19:16,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:19:16,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 01:19:16,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155815636] [2021-11-17 01:19:16,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:19:16,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-17 01:19:16,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:16,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-17 01:19:16,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-17 01:19:16,364 INFO L87 Difference]: Start difference. First operand 562 states and 777 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-17 01:19:19,467 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 01:19:20,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:20,041 INFO L93 Difference]: Finished difference Result 1344 states and 1870 transitions. [2021-11-17 01:19:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-17 01:19:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 81 [2021-11-17 01:19:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:20,045 INFO L225 Difference]: With dead ends: 1344 [2021-11-17 01:19:20,045 INFO L226 Difference]: Without dead ends: 798 [2021-11-17 01:19:20,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-17 01:19:20,047 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 944 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 424 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 1303 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:20,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 1303 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 777 Invalid, 1 Unknown, 0 Unchecked, 3.6s Time] [2021-11-17 01:19:20,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-11-17 01:19:20,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 703. [2021-11-17 01:19:20,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 537 states have (on average 1.3463687150837989) internal successors, (723), 542 states have internal predecessors, (723), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-17 01:19:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 958 transitions. [2021-11-17 01:19:20,070 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 958 transitions. Word has length 81 [2021-11-17 01:19:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:20,070 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 958 transitions. [2021-11-17 01:19:20,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-17 01:19:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 958 transitions. [2021-11-17 01:19:20,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-17 01:19:20,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:20,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:20,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-17 01:19:20,072 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:20,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1746632066, now seen corresponding path program 1 times [2021-11-17 01:19:20,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:20,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615930196] [2021-11-17 01:19:20,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:20,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:20,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:20,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:20,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-17 01:19:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:20,193 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-17 01:19:20,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:20,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615930196] [2021-11-17 01:19:20,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615930196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:19:20,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:19:20,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 01:19:20,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492624266] [2021-11-17 01:19:20,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:19:20,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-17 01:19:20,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-17 01:19:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-17 01:19:20,195 INFO L87 Difference]: Start difference. First operand 703 states and 958 transitions. Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 01:19:24,606 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 01:19:26,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:19:28,861 WARN L515 Checker$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 01:19:30,891 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 01:19:31,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:31,022 INFO L93 Difference]: Finished difference Result 1869 states and 2665 transitions. [2021-11-17 01:19:31,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 01:19:31,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-11-17 01:19:31,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:31,027 INFO L225 Difference]: With dead ends: 1869 [2021-11-17 01:19:31,027 INFO L226 Difference]: Without dead ends: 1182 [2021-11-17 01:19:31,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-17 01:19:31,030 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 620 mSDsluCounter, 1202 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 258 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:31,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 2079 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1089 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2021-11-17 01:19:31,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-11-17 01:19:31,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 757. [2021-11-17 01:19:31,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 591 states have (on average 1.365482233502538) internal successors, (807), 596 states have internal predecessors, (807), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-17 01:19:31,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 1042 transitions. [2021-11-17 01:19:31,063 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 1042 transitions. Word has length 83 [2021-11-17 01:19:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:31,066 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 1042 transitions. [2021-11-17 01:19:31,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 01:19:31,066 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 1042 transitions. [2021-11-17 01:19:31,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-17 01:19:31,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:31,068 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:31,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-17 01:19:31,068 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:31,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:31,069 INFO L85 PathProgramCache]: Analyzing trace with hash -247512640, now seen corresponding path program 1 times [2021-11-17 01:19:31,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:31,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184505606] [2021-11-17 01:19:31,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:31,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:31,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:31,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:31,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-17 01:19:31,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:31,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-17 01:19:31,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:31,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184505606] [2021-11-17 01:19:31,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184505606] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-17 01:19:31,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475279780] [2021-11-17 01:19:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:31,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 01:19:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 01:19:31,203 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 01:19:31,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-17 01:19:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:31,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 2836 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-17 01:19:31,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 01:19:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-17 01:19:31,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 01:19:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-17 01:19:31,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475279780] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 01:19:31,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-17 01:19:31,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-11-17 01:19:31,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625721504] [2021-11-17 01:19:31,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-17 01:19:31,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-17 01:19:31,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:31,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-17 01:19:31,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-17 01:19:31,920 INFO L87 Difference]: Start difference. First operand 757 states and 1042 transitions. Second operand has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 01:19:36,248 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 01:19:38,284 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:19:41,257 WARN L515 Checker$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 01:19:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:41,696 INFO L93 Difference]: Finished difference Result 3177 states and 4755 transitions. [2021-11-17 01:19:41,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-17 01:19:41,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-11-17 01:19:41,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:41,705 INFO L225 Difference]: With dead ends: 3177 [2021-11-17 01:19:41,706 INFO L226 Difference]: Without dead ends: 2436 [2021-11-17 01:19:41,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-11-17 01:19:41,709 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 2119 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 834 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2331 SdHoareTripleChecker+Valid, 2517 SdHoareTripleChecker+Invalid, 2673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:41,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2331 Valid, 2517 Invalid, 2673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 1836 Invalid, 3 Unknown, 0 Unchecked, 9.6s Time] [2021-11-17 01:19:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-11-17 01:19:41,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 817. [2021-11-17 01:19:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 651 states have (on average 1.368663594470046) internal successors, (891), 656 states have internal predecessors, (891), 118 states have call successors, (118), 48 states have call predecessors, (118), 47 states have return successors, (117), 117 states have call predecessors, (117), 117 states have call successors, (117) [2021-11-17 01:19:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1126 transitions. [2021-11-17 01:19:41,744 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1126 transitions. Word has length 83 [2021-11-17 01:19:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:41,745 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 1126 transitions. [2021-11-17 01:19:41,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.222222222222221) internal successors, (83), 7 states have internal predecessors, (83), 2 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 01:19:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1126 transitions. [2021-11-17 01:19:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-17 01:19:41,749 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:41,750 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:41,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-17 01:19:41,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 01:19:41,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:41,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash -2050556224, now seen corresponding path program 1 times [2021-11-17 01:19:41,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:41,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465867356] [2021-11-17 01:19:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:41,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:42,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:42,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:42,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-17 01:19:42,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:42,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-17 01:19:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:42,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:19:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:42,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-17 01:19:42,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:42,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465867356] [2021-11-17 01:19:42,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465867356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:19:42,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:19:42,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-17 01:19:42,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724057540] [2021-11-17 01:19:42,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:19:42,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-17 01:19:42,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:42,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-17 01:19:42,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-17 01:19:42,199 INFO L87 Difference]: Start difference. First operand 817 states and 1126 transitions. Second operand has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 01:19:45,194 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:19:47,223 WARN L515 Checker$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 01:19:47,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:47,897 INFO L93 Difference]: Finished difference Result 1685 states and 2342 transitions. [2021-11-17 01:19:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-17 01:19:47,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 96 [2021-11-17 01:19:47,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:47,901 INFO L225 Difference]: With dead ends: 1685 [2021-11-17 01:19:47,901 INFO L226 Difference]: Without dead ends: 884 [2021-11-17 01:19:47,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-11-17 01:19:47,904 INFO L933 BasicCegarLoop]: 592 mSDtfsCounter, 772 mSDsluCounter, 1694 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 442 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 2286 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:47,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 2286 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 1180 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-17 01:19:47,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-11-17 01:19:47,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 798. [2021-11-17 01:19:47,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 638 states have (on average 1.365203761755486) internal successors, (871), 643 states have internal predecessors, (871), 112 states have call successors, (112), 48 states have call predecessors, (112), 47 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-17 01:19:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1094 transitions. [2021-11-17 01:19:47,925 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1094 transitions. Word has length 96 [2021-11-17 01:19:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:47,925 INFO L470 AbstractCegarLoop]: Abstraction has 798 states and 1094 transitions. [2021-11-17 01:19:47,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.25) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (10), 5 states have call predecessors, (10), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-17 01:19:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1094 transitions. [2021-11-17 01:19:47,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-17 01:19:47,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:47,928 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:47,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-17 01:19:47,928 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:47,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:47,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2089394007, now seen corresponding path program 2 times [2021-11-17 01:19:47,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:47,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508956486] [2021-11-17 01:19:47,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:47,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:47,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:48,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:48,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:48,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-17 01:19:48,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-17 01:19:48,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:48,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508956486] [2021-11-17 01:19:48,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508956486] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:19:48,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:19:48,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-17 01:19:48,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003828035] [2021-11-17 01:19:48,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:19:48,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-17 01:19:48,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-17 01:19:48,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-17 01:19:48,101 INFO L87 Difference]: Start difference. First operand 798 states and 1094 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 01:19:51,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:19:53,073 WARN L515 Checker$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 01:19:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:53,699 INFO L93 Difference]: Finished difference Result 1092 states and 1550 transitions. [2021-11-17 01:19:53,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-17 01:19:53,700 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 98 [2021-11-17 01:19:53,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:53,704 INFO L225 Difference]: With dead ends: 1092 [2021-11-17 01:19:53,704 INFO L226 Difference]: Without dead ends: 1089 [2021-11-17 01:19:53,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-17 01:19:53,705 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 1021 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 325 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1054 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:53,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1054 Valid, 1097 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [325 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-11-17 01:19:53,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2021-11-17 01:19:53,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 802. [2021-11-17 01:19:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 641 states have (on average 1.3634945397815912) internal successors, (874), 646 states have internal predecessors, (874), 112 states have call successors, (112), 49 states have call predecessors, (112), 48 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2021-11-17 01:19:53,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 1097 transitions. [2021-11-17 01:19:53,728 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 1097 transitions. Word has length 98 [2021-11-17 01:19:53,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:53,728 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 1097 transitions. [2021-11-17 01:19:53,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-17 01:19:53,729 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 1097 transitions. [2021-11-17 01:19:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-17 01:19:53,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:53,730 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:53,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-17 01:19:53,730 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:53,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:53,731 INFO L85 PathProgramCache]: Analyzing trace with hash -853712003, now seen corresponding path program 1 times [2021-11-17 01:19:53,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:53,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747364351] [2021-11-17 01:19:53,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:53,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-11-17 01:19:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-17 01:19:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-17 01:19:53,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-17 01:19:53,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-17 01:19:53,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-17 01:19:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:19:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-17 01:19:53,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:53,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747364351] [2021-11-17 01:19:53,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747364351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-17 01:19:53,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566080823] [2021-11-17 01:19:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:53,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 01:19:53,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 01:19:53,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 01:19:53,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-17 01:19:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:54,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 3084 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-17 01:19:54,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 01:19:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-17 01:19:54,593 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-17 01:19:54,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566080823] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:19:54,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-17 01:19:54,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-17 01:19:54,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244433639] [2021-11-17 01:19:54,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:19:54,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-17 01:19:54,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:54,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-17 01:19:54,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-17 01:19:54,595 INFO L87 Difference]: Start difference. First operand 802 states and 1097 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-17 01:19:54,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:54,726 INFO L93 Difference]: Finished difference Result 2141 states and 2940 transitions. [2021-11-17 01:19:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-17 01:19:54,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 116 [2021-11-17 01:19:54,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:54,731 INFO L225 Difference]: With dead ends: 2141 [2021-11-17 01:19:54,731 INFO L226 Difference]: Without dead ends: 1355 [2021-11-17 01:19:54,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-17 01:19:54,734 INFO L933 BasicCegarLoop]: 1178 mSDtfsCounter, 510 mSDsluCounter, 3011 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 4189 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:54,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 4189 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-17 01:19:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2021-11-17 01:19:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 806. [2021-11-17 01:19:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 644 states have (on average 1.3618012422360248) internal successors, (877), 649 states have internal predecessors, (877), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2021-11-17 01:19:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 1101 transitions. [2021-11-17 01:19:54,763 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 1101 transitions. Word has length 116 [2021-11-17 01:19:54,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:54,764 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 1101 transitions. [2021-11-17 01:19:54,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-17 01:19:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 1101 transitions. [2021-11-17 01:19:54,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-17 01:19:54,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:54,766 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:54,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-17 01:19:54,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-17 01:19:54,989 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:54,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:54,989 INFO L85 PathProgramCache]: Analyzing trace with hash -2124736263, now seen corresponding path program 1 times [2021-11-17 01:19:54,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:54,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175879013] [2021-11-17 01:19:54,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:54,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:55,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-17 01:19:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-17 01:19:55,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:19:55,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-17 01:19:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-17 01:19:55,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-17 01:19:55,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-17 01:19:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:19:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-17 01:19:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-17 01:19:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-17 01:19:55,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-17 01:19:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-17 01:19:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2021-11-17 01:19:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:19:55,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-17 01:19:55,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:19:55,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175879013] [2021-11-17 01:19:55,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175879013] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:19:55,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:19:55,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-17 01:19:55,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486419224] [2021-11-17 01:19:55,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:19:55,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-17 01:19:55,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:19:55,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-17 01:19:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-17 01:19:55,300 INFO L87 Difference]: Start difference. First operand 806 states and 1101 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-17 01:19:58,544 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 01:19:59,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:19:59,729 INFO L93 Difference]: Finished difference Result 1919 states and 2684 transitions. [2021-11-17 01:19:59,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-17 01:19:59,730 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 197 [2021-11-17 01:19:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:19:59,735 INFO L225 Difference]: With dead ends: 1919 [2021-11-17 01:19:59,735 INFO L226 Difference]: Without dead ends: 1129 [2021-11-17 01:19:59,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-17 01:19:59,738 INFO L933 BasicCegarLoop]: 591 mSDtfsCounter, 1070 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 551 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1112 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-17 01:19:59,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1112 Valid, 1565 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 1170 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-17 01:19:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-11-17 01:19:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 807. [2021-11-17 01:19:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 645 states have (on average 1.3612403100775194) internal successors, (878), 650 states have internal predecessors, (878), 112 states have call successors, (112), 49 states have call predecessors, (112), 49 states have return successors, (112), 112 states have call predecessors, (112), 111 states have call successors, (112) [2021-11-17 01:19:59,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1102 transitions. [2021-11-17 01:19:59,765 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1102 transitions. Word has length 197 [2021-11-17 01:19:59,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:19:59,766 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1102 transitions. [2021-11-17 01:19:59,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 3 states have internal predecessors, (127), 2 states have call successors, (22), 6 states have call predecessors, (22), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-17 01:19:59,766 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1102 transitions. [2021-11-17 01:19:59,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-17 01:19:59,768 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:19:59,768 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:19:59,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-17 01:19:59,768 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:19:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:19:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1201117839, now seen corresponding path program 1 times [2021-11-17 01:19:59,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:19:59,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093644733] [2021-11-17 01:19:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:19:59,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:19:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:19:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:19:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-17 01:19:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-11-17 01:19:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:19:59,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-17 01:19:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-17 01:19:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-17 01:19:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-17 01:19:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:19:59,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:19:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2021-11-17 01:20:00,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-11-17 01:20:00,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2021-11-17 01:20:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-11-17 01:20:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-17 01:20:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2021-11-17 01:20:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2021-11-17 01:20:00,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:20:00,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,034 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-17 01:20:00,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:20:00,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093644733] [2021-11-17 01:20:00,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093644733] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-17 01:20:00,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331704045] [2021-11-17 01:20:00,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:20:00,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 01:20:00,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 01:20:00,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 01:20:00,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-17 01:20:00,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:00,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 3695 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-17 01:20:00,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 01:20:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-17 01:20:00,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 01:20:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-17 01:20:01,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331704045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 01:20:01,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-17 01:20:01,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2021-11-17 01:20:01,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679869867] [2021-11-17 01:20:01,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-17 01:20:01,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-17 01:20:01,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:20:01,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-17 01:20:01,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-11-17 01:20:01,177 INFO L87 Difference]: Start difference. First operand 807 states and 1102 transitions. Second operand has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-17 01:20:06,956 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:20:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:20:10,194 INFO L93 Difference]: Finished difference Result 5881 states and 8943 transitions. [2021-11-17 01:20:10,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-17 01:20:10,195 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) Word has length 207 [2021-11-17 01:20:10,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:20:10,211 INFO L225 Difference]: With dead ends: 5881 [2021-11-17 01:20:10,212 INFO L226 Difference]: Without dead ends: 5090 [2021-11-17 01:20:10,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=932, Invalid=3100, Unknown=0, NotChecked=0, Total=4032 [2021-11-17 01:20:10,216 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 7508 mSDsluCounter, 4236 mSDsCounter, 0 mSdLazyCounter, 6281 mSolverCounterSat, 3532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7879 SdHoareTripleChecker+Valid, 4991 SdHoareTripleChecker+Invalid, 9813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3532 IncrementalHoareTripleChecker+Valid, 6281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-17 01:20:10,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7879 Valid, 4991 Invalid, 9813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3532 Valid, 6281 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2021-11-17 01:20:10,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5090 states. [2021-11-17 01:20:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5090 to 934. [2021-11-17 01:20:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 771 states have (on average 1.364461738002594) internal successors, (1052), 776 states have internal predecessors, (1052), 113 states have call successors, (113), 49 states have call predecessors, (113), 49 states have return successors, (113), 113 states have call predecessors, (113), 112 states have call successors, (113) [2021-11-17 01:20:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1278 transitions. [2021-11-17 01:20:10,285 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1278 transitions. Word has length 207 [2021-11-17 01:20:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:20:10,286 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1278 transitions. [2021-11-17 01:20:10,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.5) internal successors, (243), 14 states have internal predecessors, (243), 3 states have call successors, (55), 6 states have call predecessors, (55), 2 states have return successors, (44), 3 states have call predecessors, (44), 3 states have call successors, (44) [2021-11-17 01:20:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1278 transitions. [2021-11-17 01:20:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-17 01:20:10,288 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:20:10,289 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:20:10,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-17 01:20:10,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 01:20:10,507 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:20:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:20:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1247223031, now seen corresponding path program 2 times [2021-11-17 01:20:10,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:20:10,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366289288] [2021-11-17 01:20:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:20:10,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:20:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:20:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:20:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-17 01:20:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-11-17 01:20:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:20:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2021-11-17 01:20:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2021-11-17 01:20:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-11-17 01:20:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-11-17 01:20:10,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:20:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-11-17 01:20:10,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2021-11-17 01:20:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2021-11-17 01:20:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2021-11-17 01:20:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2021-11-17 01:20:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 193 [2021-11-17 01:20:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-17 01:20:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 221 [2021-11-17 01:20:10,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:20:10,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:20:10,903 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-17 01:20:10,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:20:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366289288] [2021-11-17 01:20:10,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366289288] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-17 01:20:10,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640424054] [2021-11-17 01:20:10,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-17 01:20:10,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 01:20:10,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-11-17 01:20:10,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-17 01:20:10,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-17 01:21:14,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-17 01:21:14,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-17 01:21:14,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 3859 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-17 01:21:14,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-17 01:21:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 4 proven. 235 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-17 01:21:14,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-17 01:21:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 235 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-17 01:21:15,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640424054] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-17 01:21:15,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-17 01:21:15,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 23 [2021-11-17 01:21:15,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668654520] [2021-11-17 01:21:15,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-17 01:21:15,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-17 01:21:15,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:21:15,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-17 01:21:15,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=326, Unknown=0, NotChecked=0, Total=506 [2021-11-17 01:21:15,360 INFO L87 Difference]: Start difference. First operand 934 states and 1278 transitions. Second operand has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-17 01:21:24,424 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:21:26,451 WARN L515 Checker$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 01:21:29,216 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-17 01:21:31,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:21:31,373 INFO L93 Difference]: Finished difference Result 8510 states and 13008 transitions. [2021-11-17 01:21:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-17 01:21:31,374 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 247 [2021-11-17 01:21:31,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:21:31,419 INFO L225 Difference]: With dead ends: 8510 [2021-11-17 01:21:31,420 INFO L226 Difference]: Without dead ends: 7592 [2021-11-17 01:21:31,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=980, Invalid=2442, Unknown=0, NotChecked=0, Total=3422 [2021-11-17 01:21:31,424 INFO L933 BasicCegarLoop]: 908 mSDtfsCounter, 11120 mSDsluCounter, 4899 mSDsCounter, 0 mSdLazyCounter, 7630 mSolverCounterSat, 4797 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11690 SdHoareTripleChecker+Valid, 5807 SdHoareTripleChecker+Invalid, 12429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4797 IncrementalHoareTripleChecker+Valid, 7630 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-17 01:21:31,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11690 Valid, 5807 Invalid, 12429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4797 Valid, 7630 Invalid, 2 Unknown, 0 Unchecked, 14.8s Time] [2021-11-17 01:21:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7592 states. [2021-11-17 01:21:31,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7592 to 1054. [2021-11-17 01:21:31,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 891 states have (on average 1.3692480359147026) internal successors, (1220), 896 states have internal predecessors, (1220), 113 states have call successors, (113), 49 states have call predecessors, (113), 49 states have return successors, (113), 113 states have call predecessors, (113), 112 states have call successors, (113) [2021-11-17 01:21:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 1446 transitions. [2021-11-17 01:21:31,531 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 1446 transitions. Word has length 247 [2021-11-17 01:21:31,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:21:31,531 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 1446 transitions. [2021-11-17 01:21:31,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 10.826086956521738) internal successors, (249), 19 states have internal predecessors, (249), 2 states have call successors, (45), 6 states have call predecessors, (45), 2 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-17 01:21:31,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 1446 transitions. [2021-11-17 01:21:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-17 01:21:31,534 INFO L506 BasicCegarLoop]: Found error trace [2021-11-17 01:21:31,535 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-17 01:21:31,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-17 01:21:31,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-17 01:21:31,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-17 01:21:31,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-17 01:21:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash 956437033, now seen corresponding path program 3 times [2021-11-17 01:21:31,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-17 01:21:31,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630430676] [2021-11-17 01:21:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-17 01:21:31,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-17 01:21:31,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-17 01:21:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-17 01:21:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-11-17 01:21:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2021-11-17 01:21:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:21:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2021-11-17 01:21:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-17 01:21:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2021-11-17 01:21:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2021-11-17 01:21:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:21:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2021-11-17 01:21:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 199 [2021-11-17 01:21:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2021-11-17 01:21:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2021-11-17 01:21:32,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2021-11-17 01:21:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2021-11-17 01:21:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 233 [2021-11-17 01:21:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 251 [2021-11-17 01:21:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-17 01:21:32,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-17 01:21:32,202 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2021-11-17 01:21:32,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-17 01:21:32,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630430676] [2021-11-17 01:21:32,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630430676] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-17 01:21:32,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-17 01:21:32,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-17 01:21:32,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851192642] [2021-11-17 01:21:32,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-17 01:21:32,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-17 01:21:32,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-17 01:21:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-17 01:21:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-17 01:21:32,204 INFO L87 Difference]: Start difference. First operand 1054 states and 1446 transitions. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-17 01:21:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-17 01:21:32,727 INFO L93 Difference]: Finished difference Result 2036 states and 2856 transitions. [2021-11-17 01:21:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-17 01:21:32,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) Word has length 277 [2021-11-17 01:21:32,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-17 01:21:32,728 INFO L225 Difference]: With dead ends: 2036 [2021-11-17 01:21:32,728 INFO L226 Difference]: Without dead ends: 0 [2021-11-17 01:21:32,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-17 01:21:32,731 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 272 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-17 01:21:32,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 740 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-17 01:21:32,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-17 01:21:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-17 01:21:32,732 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 01:21:32,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-17 01:21:32,732 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 277 [2021-11-17 01:21:32,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-17 01:21:32,732 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-17 01:21:32,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (23), 6 states have call predecessors, (23), 2 states have return successors, (18), 3 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-17 01:21:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-17 01:21:32,733 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-17 01:21:32,735 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-17 01:21:32,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-17 01:21:32,737 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-17 01:22:05,950 WARN L227 SmtUtils]: Spent 33.11s on a formula simplification. DAG size of input: 125 DAG size of output: 123 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 01:23:22,843 WARN L227 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 01:23:33,670 WARN L227 SmtUtils]: Spent 10.81s on a formula simplification. DAG size of input: 690 DAG size of output: 686 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 01:24:51,233 WARN L227 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-17 01:26:07,554 WARN L227 SmtUtils]: Spent 1.27m on a formula simplification. DAG size of input: 131 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15