./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:42:54,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:42:54,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:42:54,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:42:54,550 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:42:54,554 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:42:54,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:42:54,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:42:54,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:42:54,573 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:42:54,574 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:42:54,577 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:42:54,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:42:54,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:42:54,582 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:42:54,584 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:42:54,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:42:54,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:42:54,589 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:42:54,596 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:42:54,598 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:42:54,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:42:54,603 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:42:54,604 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:42:54,614 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:42:54,614 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:42:54,615 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:42:54,617 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:42:54,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:42:54,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:42:54,619 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:42:54,620 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:42:54,623 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:42:54,625 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:42:54,626 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:42:54,626 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:42:54,627 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:42:54,627 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:42:54,628 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:42:54,629 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:42:54,630 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:42:54,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-10-17 17:42:54,675 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:42:54,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:42:54,676 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:42:54,676 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:42:54,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:42:54,678 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:42:54,678 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:42:54,679 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:42:54,679 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:42:54,679 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:42:54,680 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:42:54,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:42:54,681 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:42:54,681 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:42:54,681 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:42:54,681 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:42:54,682 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:42:54,682 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:42:54,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:42:54,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:42:54,683 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:42:54,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:42:54,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:42:54,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:42:54,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:42:54,686 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:42:54,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:42:54,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:42:54,686 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:42:54,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:54,687 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:42:54,687 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:42:54,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:42:54,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:42:54,688 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:42:54,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:42:54,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:42:54,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:42:54,689 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 781669661afd0476205c0d0f127c7931dffbaabf4aae46244e576c29ee5a8115 [2022-10-17 17:42:54,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:42:54,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:42:54,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:42:54,982 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:42:54,983 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:42:54,984 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-10-17 17:42:55,079 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/data/c58125ee4/611a3e435c1a4f3babfcb8f0a4ebd95f/FLAG16cbc1744 [2022-10-17 17:42:55,826 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:42:55,827 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-10-17 17:42:55,869 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/data/c58125ee4/611a3e435c1a4f3babfcb8f0a4ebd95f/FLAG16cbc1744 [2022-10-17 17:42:55,899 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/data/c58125ee4/611a3e435c1a4f3babfcb8f0a4ebd95f [2022-10-17 17:42:55,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:42:55,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:42:55,908 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:55,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:42:55,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:42:55,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:55" (1/1) ... [2022-10-17 17:42:55,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e5a7e6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:55, skipping insertion in model container [2022-10-17 17:42:55,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:42:55" (1/1) ... [2022-10-17 17:42:55,921 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:42:56,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:42:56,989 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-10-17 17:42:57,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:57,546 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:42:57,748 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2022-10-17 17:42:57,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:42:58,041 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:42:58,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58 WrapperNode [2022-10-17 17:42:58,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:42:58,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:58,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:42:58,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:42:58,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,330 INFO L138 Inliner]: procedures = 160, calls = 847, calls flagged for inlining = 71, calls inlined = 71, statements flattened = 2365 [2022-10-17 17:42:58,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:42:58,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:42:58,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:42:58,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:42:58,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,358 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,483 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:42:58,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:42:58,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:42:58,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:42:58,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (1/1) ... [2022-10-17 17:42:58,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:42:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:42:58,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:42:58,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ca53ac5-1050-485f-847f-c608a0b1c9c3/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:42:58,595 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2022-10-17 17:42:58,596 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2022-10-17 17:42:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2022-10-17 17:42:58,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2022-10-17 17:42:58,596 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_17 [2022-10-17 17:42:58,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_17 [2022-10-17 17:42:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2022-10-17 17:42:58,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2022-10-17 17:42:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2022-10-17 17:42:58,597 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2022-10-17 17:42:58,597 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-10-17 17:42:58,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-10-17 17:42:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:42:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure netif_tx_start_queue [2022-10-17 17:42:58,598 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_tx_start_queue [2022-10-17 17:42:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure can_free_echo_skb [2022-10-17 17:42:58,598 INFO L138 BoogieDeclarations]: Found implementation of procedure can_free_echo_skb [2022-10-17 17:42:58,598 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-10-17 17:42:58,599 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-10-17 17:42:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2022-10-17 17:42:58,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2022-10-17 17:42:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-10-17 17:42:58,599 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-10-17 17:42:58,599 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2022-10-17 17:42:58,600 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2022-10-17 17:42:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-10-17 17:42:58,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-10-17 17:42:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2022-10-17 17:42:58,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2022-10-17 17:42:58,600 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_anchored_urbs [2022-10-17 17:42:58,601 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_anchored_urbs [2022-10-17 17:42:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-10-17 17:42:58,601 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-10-17 17:42:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure init_usb_anchor [2022-10-17 17:42:58,601 INFO L138 BoogieDeclarations]: Found implementation of procedure init_usb_anchor [2022-10-17 17:42:58,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:42:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-10-17 17:42:58,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-10-17 17:42:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2022-10-17 17:42:58,602 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2022-10-17 17:42:58,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-10-17 17:42:58,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-10-17 17:42:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-10-17 17:42:58,603 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-10-17 17:42:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-10-17 17:42:58,603 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-10-17 17:42:58,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:42:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2022-10-17 17:42:58,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2022-10-17 17:42:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_4 [2022-10-17 17:42:58,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_4 [2022-10-17 17:42:58,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:42:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure consume_skb [2022-10-17 17:42:58,605 INFO L138 BoogieDeclarations]: Found implementation of procedure consume_skb [2022-10-17 17:42:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2022-10-17 17:42:58,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2022-10-17 17:42:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:42:58,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:42:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 17:42:58,606 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2022-10-17 17:42:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2022-10-17 17:42:58,606 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2022-10-17 17:42:58,606 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2022-10-17 17:42:58,606 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2022-10-17 17:42:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:42:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2022-10-17 17:42:58,607 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2022-10-17 17:42:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure netif_rx [2022-10-17 17:42:58,607 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_rx [2022-10-17 17:42:58,607 INFO L130 BoogieDeclarations]: Found specification of procedure usb_anchor_urb [2022-10-17 17:42:58,608 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_anchor_urb [2022-10-17 17:42:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:42:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:42:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-10-17 17:42:58,608 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-10-17 17:42:58,608 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_read_bulk_callback [2022-10-17 17:42:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_read_bulk_callback [2022-10-17 17:42:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_send_msg [2022-10-17 17:42:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_send_msg [2022-10-17 17:42:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_detach [2022-10-17 17:42:58,609 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_detach [2022-10-17 17:42:58,609 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-10-17 17:42:58,610 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-10-17 17:42:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-10-17 17:42:58,610 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-10-17 17:42:58,610 INFO L130 BoogieDeclarations]: Found specification of procedure usb_unanchor_urb [2022-10-17 17:42:58,610 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_unanchor_urb [2022-10-17 17:42:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-10-17 17:42:58,611 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-10-17 17:42:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2022-10-17 17:42:58,611 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2022-10-17 17:42:58,611 INFO L130 BoogieDeclarations]: Found specification of procedure close_candev [2022-10-17 17:42:58,611 INFO L138 BoogieDeclarations]: Found implementation of procedure close_candev [2022-10-17 17:42:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:42:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure free_candev [2022-10-17 17:42:58,612 INFO L138 BoogieDeclarations]: Found implementation of procedure free_candev [2022-10-17 17:42:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2022-10-17 17:42:58,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2022-10-17 17:42:58,612 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2022-10-17 17:42:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2022-10-17 17:42:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_disconnect [2022-10-17 17:42:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_disconnect [2022-10-17 17:42:58,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:42:58,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:42:59,246 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:42:59,249 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:42:59,472 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-10-17 17:43:00,189 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2022-10-17 17:43:01,368 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:43:02,107 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:43:02,108 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-10-17 17:43:02,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:02 BoogieIcfgContainer [2022-10-17 17:43:02,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:43:02,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:43:02,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:43:02,124 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:43:02,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:42:55" (1/3) ... [2022-10-17 17:43:02,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef04f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:02, skipping insertion in model container [2022-10-17 17:43:02,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:42:58" (2/3) ... [2022-10-17 17:43:02,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ef04f73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:43:02, skipping insertion in model container [2022-10-17 17:43:02,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:43:02" (3/3) ... [2022-10-17 17:43:02,134 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2022-10-17 17:43:02,159 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:43:02,159 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:43:02,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:43:02,269 INFO L357 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=FINITE_AUTOMATA, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d28e9c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:43:02,269 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:43:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand has 516 states, 328 states have (on average 1.3902439024390243) internal successors, (456), 356 states have internal predecessors, (456), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) [2022-10-17 17:43:02,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-10-17 17:43:02,295 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:02,296 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:02,297 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:02,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1894622402, now seen corresponding path program 1 times [2022-10-17 17:43:02,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:02,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661548740] [2022-10-17 17:43:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:02,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:02,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-10-17 17:43:03,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:03,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661548740] [2022-10-17 17:43:03,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661548740] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:03,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:03,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:43:03,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461181483] [2022-10-17 17:43:03,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:03,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:03,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:03,214 INFO L87 Difference]: Start difference. First operand has 516 states, 328 states have (on average 1.3902439024390243) internal successors, (456), 356 states have internal predecessors, (456), 142 states have call successors, (142), 46 states have call predecessors, (142), 44 states have return successors, (133), 132 states have call predecessors, (133), 133 states have call successors, (133) Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-10-17 17:43:06,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:08,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:08,297 INFO L93 Difference]: Finished difference Result 1475 states and 2086 transitions. [2022-10-17 17:43:08,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:43:08,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 78 [2022-10-17 17:43:08,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:08,337 INFO L225 Difference]: With dead ends: 1475 [2022-10-17 17:43:08,352 INFO L226 Difference]: Without dead ends: 958 [2022-10-17 17:43:08,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:08,363 INFO L413 NwaCegarLoop]: 735 mSDtfsCounter, 649 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1345 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:08,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1345 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-10-17 17:43:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2022-10-17 17:43:08,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 956. [2022-10-17 17:43:08,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 623 states have (on average 1.3595505617977528) internal successors, (847), 654 states have internal predecessors, (847), 246 states have call successors, (246), 87 states have call predecessors, (246), 86 states have return successors, (242), 238 states have call predecessors, (242), 241 states have call successors, (242) [2022-10-17 17:43:08,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1335 transitions. [2022-10-17 17:43:08,572 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1335 transitions. Word has length 78 [2022-10-17 17:43:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:08,573 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 1335 transitions. [2022-10-17 17:43:08,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2022-10-17 17:43:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1335 transitions. [2022-10-17 17:43:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-10-17 17:43:08,589 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:08,589 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:08,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:43:08,589 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:08,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:08,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1021679534, now seen corresponding path program 1 times [2022-10-17 17:43:08,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:08,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679663813] [2022-10-17 17:43:08,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:08,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:09,284 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-10-17 17:43:09,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679663813] [2022-10-17 17:43:09,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679663813] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:09,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:09,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:43:09,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697617863] [2022-10-17 17:43:09,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:09,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:09,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:09,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:09,297 INFO L87 Difference]: Start difference. First operand 956 states and 1335 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-10-17 17:43:11,913 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:13,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:15,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:15,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:15,374 INFO L93 Difference]: Finished difference Result 1515 states and 2111 transitions. [2022-10-17 17:43:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:43:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 87 [2022-10-17 17:43:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:15,418 INFO L225 Difference]: With dead ends: 1515 [2022-10-17 17:43:15,418 INFO L226 Difference]: Without dead ends: 1512 [2022-10-17 17:43:15,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:15,421 INFO L413 NwaCegarLoop]: 673 mSDtfsCounter, 398 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:15,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 1237 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2022-10-17 17:43:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1512 states. [2022-10-17 17:43:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1512 to 1500. [2022-10-17 17:43:15,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 984 states have (on average 1.3658536585365855) internal successors, (1344), 1028 states have internal predecessors, (1344), 377 states have call successors, (377), 141 states have call predecessors, (377), 138 states have return successors, (373), 362 states have call predecessors, (373), 372 states have call successors, (373) [2022-10-17 17:43:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2094 transitions. [2022-10-17 17:43:15,533 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2094 transitions. Word has length 87 [2022-10-17 17:43:15,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:15,535 INFO L495 AbstractCegarLoop]: Abstraction has 1500 states and 2094 transitions. [2022-10-17 17:43:15,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-10-17 17:43:15,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2094 transitions. [2022-10-17 17:43:15,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-10-17 17:43:15,540 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:15,541 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:15,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:43:15,541 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:15,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1607603803, now seen corresponding path program 1 times [2022-10-17 17:43:15,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:15,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157570118] [2022-10-17 17:43:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:15,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-10-17 17:43:16,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:16,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157570118] [2022-10-17 17:43:16,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157570118] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:16,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:16,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:43:16,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925278852] [2022-10-17 17:43:16,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:16,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:16,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:16,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:16,100 INFO L87 Difference]: Start difference. First operand 1500 states and 2094 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-10-17 17:43:18,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:20,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:21,011 INFO L93 Difference]: Finished difference Result 2971 states and 4143 transitions. [2022-10-17 17:43:21,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:43:21,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 88 [2022-10-17 17:43:21,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:21,035 INFO L225 Difference]: With dead ends: 2971 [2022-10-17 17:43:21,036 INFO L226 Difference]: Without dead ends: 2968 [2022-10-17 17:43:21,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:21,039 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 654 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:21,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [655 Valid, 1291 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 212 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-10-17 17:43:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2968 states. [2022-10-17 17:43:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2968 to 2955. [2022-10-17 17:43:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 1943 states have (on average 1.3669583118888318) internal successors, (2656), 2029 states have internal predecessors, (2656), 735 states have call successors, (735), 281 states have call predecessors, (735), 276 states have return successors, (733), 708 states have call predecessors, (733), 730 states have call successors, (733) [2022-10-17 17:43:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 4124 transitions. [2022-10-17 17:43:21,257 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 4124 transitions. Word has length 88 [2022-10-17 17:43:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:21,260 INFO L495 AbstractCegarLoop]: Abstraction has 2955 states and 4124 transitions. [2022-10-17 17:43:21,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-10-17 17:43:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 4124 transitions. [2022-10-17 17:43:21,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-10-17 17:43:21,263 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:21,264 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:21,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:43:21,264 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:21,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:21,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1703585205, now seen corresponding path program 1 times [2022-10-17 17:43:21,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:21,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989886433] [2022-10-17 17:43:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-10-17 17:43:21,472 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:21,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989886433] [2022-10-17 17:43:21,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989886433] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:21,473 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:21,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:43:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77353724] [2022-10-17 17:43:21,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:21,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:21,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:21,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:21,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:21,477 INFO L87 Difference]: Start difference. First operand 2955 states and 4124 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-10-17 17:43:23,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:26,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:26,386 INFO L93 Difference]: Finished difference Result 2966 states and 4136 transitions. [2022-10-17 17:43:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:43:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 89 [2022-10-17 17:43:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:26,413 INFO L225 Difference]: With dead ends: 2966 [2022-10-17 17:43:26,413 INFO L226 Difference]: Without dead ends: 2963 [2022-10-17 17:43:26,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:26,418 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 651 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1286 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:26,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1286 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2022-10-17 17:43:26,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2963 states. [2022-10-17 17:43:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2956. [2022-10-17 17:43:26,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 1944 states have (on average 1.366769547325103) internal successors, (2657), 2030 states have internal predecessors, (2657), 735 states have call successors, (735), 281 states have call predecessors, (735), 276 states have return successors, (733), 708 states have call predecessors, (733), 730 states have call successors, (733) [2022-10-17 17:43:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 4125 transitions. [2022-10-17 17:43:26,632 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 4125 transitions. Word has length 89 [2022-10-17 17:43:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:26,632 INFO L495 AbstractCegarLoop]: Abstraction has 2956 states and 4125 transitions. [2022-10-17 17:43:26,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-10-17 17:43:26,633 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 4125 transitions. [2022-10-17 17:43:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-10-17 17:43:26,634 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:26,635 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:26,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:43:26,635 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1271234216, now seen corresponding path program 1 times [2022-10-17 17:43:26,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:26,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964644964] [2022-10-17 17:43:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:26,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-10-17 17:43:26,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:26,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964644964] [2022-10-17 17:43:26,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964644964] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:26,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:26,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:43:26,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258897891] [2022-10-17 17:43:26,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:26,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:26,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:26,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:26,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:26,813 INFO L87 Difference]: Start difference. First operand 2956 states and 4125 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-10-17 17:43:29,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:31,394 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-10-17 17:43:31,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:43:31,755 INFO L93 Difference]: Finished difference Result 2967 states and 4137 transitions. [2022-10-17 17:43:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:43:31,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 90 [2022-10-17 17:43:31,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:43:31,777 INFO L225 Difference]: With dead ends: 2967 [2022-10-17 17:43:31,777 INFO L226 Difference]: Without dead ends: 2964 [2022-10-17 17:43:31,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:31,780 INFO L413 NwaCegarLoop]: 727 mSDtfsCounter, 648 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-10-17 17:43:31,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [649 Valid, 1289 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-10-17 17:43:31,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2964 states. [2022-10-17 17:43:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2964 to 2957. [2022-10-17 17:43:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 1945 states have (on average 1.3665809768637531) internal successors, (2658), 2031 states have internal predecessors, (2658), 735 states have call successors, (735), 281 states have call predecessors, (735), 276 states have return successors, (733), 708 states have call predecessors, (733), 730 states have call successors, (733) [2022-10-17 17:43:32,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 4126 transitions. [2022-10-17 17:43:32,010 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 4126 transitions. Word has length 90 [2022-10-17 17:43:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:43:32,012 INFO L495 AbstractCegarLoop]: Abstraction has 2957 states and 4126 transitions. [2022-10-17 17:43:32,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2022-10-17 17:43:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 4126 transitions. [2022-10-17 17:43:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-10-17 17:43:32,014 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:43:32,015 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:43:32,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:43:32,015 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:43:32,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:43:32,016 INFO L85 PathProgramCache]: Analyzing trace with hash 753260312, now seen corresponding path program 1 times [2022-10-17 17:43:32,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:43:32,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074384868] [2022-10-17 17:43:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:43:32,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:43:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:43:32,201 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-10-17 17:43:32,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:43:32,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074384868] [2022-10-17 17:43:32,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074384868] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:43:32,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:43:32,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:43:32,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775444618] [2022-10-17 17:43:32,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:43:32,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:43:32,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:43:32,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:43:32,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:43:32,204 INFO L87 Difference]: Start difference. First operand 2957 states and 4126 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12)