./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 04:23:59,609 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 04:23:59,611 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 04:23:59,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 04:23:59,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 04:23:59,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 04:23:59,656 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 04:23:59,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 04:23:59,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 04:23:59,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 04:23:59,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 04:23:59,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 04:23:59,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 04:23:59,676 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 04:23:59,678 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 04:23:59,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 04:23:59,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 04:23:59,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 04:23:59,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 04:23:59,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 04:23:59,693 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 04:23:59,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 04:23:59,694 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 04:23:59,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 04:23:59,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 04:23:59,698 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 04:23:59,699 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 04:23:59,700 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 04:23:59,701 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 04:23:59,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 04:23:59,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 04:23:59,702 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 04:23:59,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 04:23:59,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 04:23:59,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 04:23:59,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 04:23:59,706 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 04:23:59,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 04:23:59,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 04:23:59,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 04:23:59,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 04:23:59,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-12-16 04:23:59,737 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 04:23:59,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 04:23:59,740 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 04:23:59,741 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 04:23:59,741 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 04:23:59,742 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 04:23:59,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 04:23:59,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 04:23:59,742 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 04:23:59,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 04:23:59,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 04:23:59,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 04:23:59,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 04:23:59,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 04:23:59,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 04:23:59,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 04:23:59,744 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 04:23:59,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 04:23:59,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 04:23:59,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 04:23:59,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 04:23:59,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 04:23:59,745 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 04:23:59,745 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 04:23:59,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 04:23:59,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 04:23:59,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 04:23:59,746 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 04:23:59,746 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 04:23:59,746 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 04:23:59,746 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 04:23:59,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57d203c2bb9e5fb46a500992932f18e1bc69473edc196ab4ca3ccbbd153a7dab [2021-12-16 04:23:59,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 04:23:59,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 04:23:59,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 04:23:59,978 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 04:23:59,978 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 04:23:59,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-16 04:24:00,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bf1449aa/fdb1165a127842d9acaa6d740f0ebc7c/FLAGcb0f37b48 [2021-12-16 04:24:00,680 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 04:24:00,681 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-16 04:24:00,726 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bf1449aa/fdb1165a127842d9acaa6d740f0ebc7c/FLAGcb0f37b48 [2021-12-16 04:24:01,018 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bf1449aa/fdb1165a127842d9acaa6d740f0ebc7c [2021-12-16 04:24:01,024 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 04:24:01,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 04:24:01,027 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 04:24:01,027 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 04:24:01,033 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 04:24:01,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:24:01" (1/1) ... [2021-12-16 04:24:01,035 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45c67ec6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:01, skipping insertion in model container [2021-12-16 04:24:01,035 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 04:24:01" (1/1) ... [2021-12-16 04:24:01,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 04:24:01,161 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 04:24:02,472 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-12-16 04:24:02,598 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 04:24:02,657 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 04:24:03,011 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i[258961,258974] [2021-12-16 04:24:03,031 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 04:24:03,110 INFO L208 MainTranslator]: Completed translation [2021-12-16 04:24:03,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03 WrapperNode [2021-12-16 04:24:03,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 04:24:03,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 04:24:03,114 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 04:24:03,114 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 04:24:03,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,212 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,321 INFO L137 Inliner]: procedures = 217, calls = 1688, calls flagged for inlining = 75, calls inlined = 52, statements flattened = 3526 [2021-12-16 04:24:03,322 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 04:24:03,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 04:24:03,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 04:24:03,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 04:24:03,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,351 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 04:24:03,528 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 04:24:03,528 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 04:24:03,528 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 04:24:03,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (1/1) ... [2021-12-16 04:24:03,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 04:24:03,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 04:24:03,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 04:24:03,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 04:24:03,624 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-12-16 04:24:03,624 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-12-16 04:24:03,625 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-12-16 04:24:03,625 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-12-16 04:24:03,625 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-12-16 04:24:03,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-12-16 04:24:03,625 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-12-16 04:24:03,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-12-16 04:24:03,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-16 04:24:03,625 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-16 04:24:03,626 INFO L130 BoogieDeclarations]: Found specification of procedure usb_put_dev [2021-12-16 04:24:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_put_dev [2021-12-16 04:24:03,626 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2021-12-16 04:24:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2021-12-16 04:24:03,626 INFO L130 BoogieDeclarations]: Found specification of procedure p54_free_common [2021-12-16 04:24:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_free_common [2021-12-16 04:24:03,626 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_stop [2021-12-16 04:24:03,626 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_stop [2021-12-16 04:24:03,626 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-12-16 04:24:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-12-16 04:24:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_bulk_urb [2021-12-16 04:24:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_bulk_urb [2021-12-16 04:24:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-12-16 04:24:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-12-16 04:24:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-16 04:24:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-16 04:24:03,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-16 04:24:03,627 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-16 04:24:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure crc32_le [2021-12-16 04:24:03,628 INFO L138 BoogieDeclarations]: Found implementation of procedure crc32_le [2021-12-16 04:24:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-12-16 04:24:03,628 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-12-16 04:24:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 04:24:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-16 04:24:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 04:24:03,628 INFO L130 BoogieDeclarations]: Found specification of procedure p54_find_type [2021-12-16 04:24:03,629 INFO L138 BoogieDeclarations]: Found implementation of procedure p54_find_type [2021-12-16 04:24:03,629 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2021-12-16 04:24:03,629 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2021-12-16 04:24:03,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 04:24:03,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 04:24:03,630 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_open [2021-12-16 04:24:03,630 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_open [2021-12-16 04:24:03,630 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-12-16 04:24:03,630 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-12-16 04:24:03,630 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2021-12-16 04:24:03,630 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2021-12-16 04:24:03,630 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_post_reset [2021-12-16 04:24:03,630 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_post_reset [2021-12-16 04:24:03,630 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-12-16 04:24:03,631 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-12-16 04:24:03,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-12-16 04:24:03,631 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-12-16 04:24:03,631 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-12-16 04:24:03,632 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_disconnect [2021-12-16 04:24:03,632 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_disconnect [2021-12-16 04:24:03,632 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-12-16 04:24:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-12-16 04:24:03,633 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-12-16 04:24:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 04:24:03,633 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_negative [2021-12-16 04:24:03,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_negative [2021-12-16 04:24:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-12-16 04:24:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-12-16 04:24:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-12-16 04:24:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-12-16 04:24:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-12-16 04:24:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-12-16 04:24:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure __netdev_alloc_skb [2021-12-16 04:24:03,634 INFO L138 BoogieDeclarations]: Found implementation of procedure __netdev_alloc_skb [2021-12-16 04:24:03,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 04:24:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_pre_reset [2021-12-16 04:24:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_pre_reset [2021-12-16 04:24:03,635 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-12-16 04:24:03,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-12-16 04:24:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-12-16 04:24:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-12-16 04:24:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 04:24:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 04:24:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_read [2021-12-16 04:24:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_read [2021-12-16 04:24:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_write [2021-12-16 04:24:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_write [2021-12-16 04:24:03,636 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-12-16 04:24:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-12-16 04:24:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-12-16 04:24:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-12-16 04:24:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 04:24:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-12-16 04:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_udev_of_p54u_priv [2021-12-16 04:24:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_resume [2021-12-16 04:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_resume [2021-12-16 04:24:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-12-16 04:24:03,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-12-16 04:24:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-12-16 04:24:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-12-16 04:24:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure skb_queue_tail [2021-12-16 04:24:03,639 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_queue_tail [2021-12-16 04:24:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_free_urbs [2021-12-16 04:24:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_free_urbs [2021-12-16 04:24:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure skb_unlink [2021-12-16 04:24:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_unlink [2021-12-16 04:24:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-12-16 04:24:03,640 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-12-16 04:24:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure p54u_bulk_msg [2021-12-16 04:24:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure p54u_bulk_msg [2021-12-16 04:24:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-12-16 04:24:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-12-16 04:24:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 04:24:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-12-16 04:24:03,641 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-12-16 04:24:03,641 INFO L130 BoogieDeclarations]: Found specification of procedure skb_tail_pointer [2021-12-16 04:24:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_tail_pointer [2021-12-16 04:24:03,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 04:24:03,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 04:24:04,067 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 04:24:04,069 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 04:24:04,363 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-12-16 04:24:42,478 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 04:24:42,499 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 04:24:42,499 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 04:24:42,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:24:42 BoogieIcfgContainer [2021-12-16 04:24:42,504 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 04:24:42,506 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 04:24:42,506 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 04:24:42,509 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 04:24:42,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 04:24:01" (1/3) ... [2021-12-16 04:24:42,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfcd649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:24:42, skipping insertion in model container [2021-12-16 04:24:42,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 04:24:03" (2/3) ... [2021-12-16 04:24:42,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dfcd649 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 04:24:42, skipping insertion in model container [2021-12-16 04:24:42,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 04:24:42" (3/3) ... [2021-12-16 04:24:42,517 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-32_7a-drivers--net--wireless--p54--p54usb.ko-entry_point.cil.out.i [2021-12-16 04:24:42,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 04:24:42,524 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 04:24:42,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 04:24:42,587 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 04:24:42,589 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 04:24:42,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) [2021-12-16 04:24:42,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 04:24:42,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:24:42,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:24:42,626 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:24:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:24:42,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1349896211, now seen corresponding path program 1 times [2021-12-16 04:24:42,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:24:42,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957918863] [2021-12-16 04:24:42,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:24:42,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:24:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:24:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:43,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 04:24:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:43,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 04:24:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:43,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 04:24:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 04:24:43,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:24:43,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957918863] [2021-12-16 04:24:43,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957918863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:24:43,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:24:43,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 04:24:43,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391884363] [2021-12-16 04:24:43,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:24:43,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 04:24:43,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:24:43,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 04:24:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 04:24:43,559 INFO L87 Difference]: Start difference. First operand has 729 states, 516 states have (on average 1.3468992248062015) internal successors, (695), 540 states have internal predecessors, (695), 163 states have call successors, (163), 49 states have call predecessors, (163), 48 states have return successors, (159), 159 states have call predecessors, (159), 159 states have call successors, (159) Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 04:24:45,621 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:24:47,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:24:48,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 04:24:48,767 INFO L93 Difference]: Finished difference Result 1558 states and 2209 transitions. [2021-12-16 04:24:48,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 04:24:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2021-12-16 04:24:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 04:24:48,781 INFO L225 Difference]: With dead ends: 1558 [2021-12-16 04:24:48,781 INFO L226 Difference]: Without dead ends: 823 [2021-12-16 04:24:48,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-16 04:24:48,790 INFO L933 BasicCegarLoop]: 965 mSDtfsCounter, 471 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 446 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1996 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-16 04:24:48,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 1996 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 444 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2021-12-16 04:24:48,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-12-16 04:24:48,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 718. [2021-12-16 04:24:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 511 states have (on average 1.3346379647749511) internal successors, (682), 529 states have internal predecessors, (682), 159 states have call successors, (159), 48 states have call predecessors, (159), 47 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2021-12-16 04:24:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 994 transitions. [2021-12-16 04:24:48,902 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 994 transitions. Word has length 39 [2021-12-16 04:24:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 04:24:48,902 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 994 transitions. [2021-12-16 04:24:48,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 04:24:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 994 transitions. [2021-12-16 04:24:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 04:24:48,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:24:48,905 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:24:48,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 04:24:48,906 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:24:48,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:24:48,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1859369301, now seen corresponding path program 1 times [2021-12-16 04:24:48,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:24:48,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608530649] [2021-12-16 04:24:48,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:24:48,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:24:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:49,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:24:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:49,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 04:24:49,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:49,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 04:24:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:49,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 04:24:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 04:24:49,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:24:49,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608530649] [2021-12-16 04:24:49,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608530649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:24:49,279 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:24:49,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 04:24:49,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856376547] [2021-12-16 04:24:49,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:24:49,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 04:24:49,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:24:49,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 04:24:49,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 04:24:49,281 INFO L87 Difference]: Start difference. First operand 718 states and 994 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 04:24:51,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:24:53,489 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:24:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 04:24:56,026 INFO L93 Difference]: Finished difference Result 2329 states and 3239 transitions. [2021-12-16 04:24:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 04:24:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2021-12-16 04:24:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 04:24:56,038 INFO L225 Difference]: With dead ends: 2329 [2021-12-16 04:24:56,039 INFO L226 Difference]: Without dead ends: 1619 [2021-12-16 04:24:56,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-16 04:24:56,044 INFO L933 BasicCegarLoop]: 1066 mSDtfsCounter, 1820 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 1003 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1911 SdHoareTripleChecker+Valid, 3018 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-16 04:24:56,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1911 Valid, 3018 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 897 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-12-16 04:24:56,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-12-16 04:24:56,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1405. [2021-12-16 04:24:56,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3346653346653348) internal successors, (1336), 1032 states have internal predecessors, (1336), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-12-16 04:24:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1948 transitions. [2021-12-16 04:24:56,128 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1948 transitions. Word has length 39 [2021-12-16 04:24:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 04:24:56,129 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1948 transitions. [2021-12-16 04:24:56,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-16 04:24:56,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1948 transitions. [2021-12-16 04:24:56,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 04:24:56,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:24:56,136 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:24:56,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 04:24:56,137 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:24:56,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:24:56,137 INFO L85 PathProgramCache]: Analyzing trace with hash 950658258, now seen corresponding path program 1 times [2021-12-16 04:24:56,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:24:56,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685408574] [2021-12-16 04:24:56,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:24:56,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:24:56,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:56,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:24:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 04:24:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:56,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 04:24:56,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:56,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 04:24:56,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:56,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 04:24:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:56,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 04:24:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:56,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 04:24:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:24:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 04:24:56,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:24:56,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685408574] [2021-12-16 04:24:56,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685408574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:24:56,696 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:24:56,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 04:24:56,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487361976] [2021-12-16 04:24:56,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:24:56,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 04:24:56,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:24:56,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 04:24:56,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 04:24:56,701 INFO L87 Difference]: Start difference. First operand 1405 states and 1948 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 04:24:58,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:25:00,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:25:02,789 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:25:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 04:25:04,374 INFO L93 Difference]: Finished difference Result 1637 states and 2275 transitions. [2021-12-16 04:25:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 04:25:04,374 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 59 [2021-12-16 04:25:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 04:25:04,380 INFO L225 Difference]: With dead ends: 1637 [2021-12-16 04:25:04,381 INFO L226 Difference]: Without dead ends: 1626 [2021-12-16 04:25:04,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-12-16 04:25:04,382 INFO L933 BasicCegarLoop]: 943 mSDtfsCounter, 1335 mSDsluCounter, 1536 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 547 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 2479 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2021-12-16 04:25:04,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1411 Valid, 2479 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 609 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2021-12-16 04:25:04,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2021-12-16 04:25:04,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1405. [2021-12-16 04:25:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1001 states have (on average 1.3336663336663337) internal successors, (1335), 1032 states have internal predecessors, (1335), 309 states have call successors, (309), 95 states have call predecessors, (309), 94 states have return successors, (303), 303 states have call predecessors, (303), 303 states have call successors, (303) [2021-12-16 04:25:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 1947 transitions. [2021-12-16 04:25:04,424 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 1947 transitions. Word has length 59 [2021-12-16 04:25:04,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 04:25:04,425 INFO L470 AbstractCegarLoop]: Abstraction has 1405 states and 1947 transitions. [2021-12-16 04:25:04,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-16 04:25:04,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 1947 transitions. [2021-12-16 04:25:04,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-16 04:25:04,426 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 04:25:04,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 04:25:04,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 04:25:04,427 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 04:25:04,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 04:25:04,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1007916560, now seen corresponding path program 1 times [2021-12-16 04:25:04,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 04:25:04,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861580350] [2021-12-16 04:25:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 04:25:04,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 04:25:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:25:04,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-16 04:25:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:25:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 04:25:04,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:25:04,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 04:25:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:25:04,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 04:25:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:25:04,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-16 04:25:04,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:25:04,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 04:25:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:25:04,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-16 04:25:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 04:25:04,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 04:25:04,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 04:25:04,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861580350] [2021-12-16 04:25:04,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861580350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 04:25:04,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 04:25:04,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 04:25:04,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908531130] [2021-12-16 04:25:04,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 04:25:04,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 04:25:04,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 04:25:04,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 04:25:04,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-16 04:25:04,964 INFO L87 Difference]: Start difference. First operand 1405 states and 1947 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 04:25:07,008 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-12-16 04:25:09,026 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []