./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-43_2a-drivers--net--ethernet--smsc--smc91c92_cs.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--smsc--smc91c92_cs.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V --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 3ecfb8b0fcef33da98f558e52c103bea043ca8b7f1be39029ddcf57b060bd03a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:08:00,564 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:08:00,567 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:08:00,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:08:00,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:08:00,615 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:08:00,618 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:08:00,620 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:08:00,623 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:08:00,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:08:00,626 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:08:00,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:08:00,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:08:00,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:08:00,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:08:00,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:08:00,635 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:08:00,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:08:00,639 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:08:00,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:08:00,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:08:00,654 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:08:00,656 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:08:00,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:08:00,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:08:00,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:08:00,669 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:08:00,670 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:08:00,672 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:08:00,673 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:08:00,678 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:08:00,679 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:08:00,680 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:08:00,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:08:00,684 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:08:00,685 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:08:00,686 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:08:00,686 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:08:00,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:08:00,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:08:00,689 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:08:00,690 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:08:00,741 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:08:00,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:08:00,742 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:08:00,742 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:08:00,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:08:00,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:08:00,750 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:08:00,750 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:08:00,750 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:08:00,750 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:08:00,751 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:08:00,752 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:08:00,752 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:08:00,752 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:08:00,752 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:08:00,753 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:08:00,753 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:08:00,753 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:08:00,754 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:08:00,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:08:00,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:08:00,754 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:08:00,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:08:00,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:08:00,755 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:08:00,755 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:08:00,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:08:00,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:08:00,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:08:00,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:08:00,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:08:00,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:08:00,759 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:08:00,759 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:08:00,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:08:00,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:08:00,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:08:00,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:08:00,760 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3ecfb8b0fcef33da98f558e52c103bea043ca8b7f1be39029ddcf57b060bd03a [2021-11-23 02:08:01,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:08:01,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:08:01,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:08:01,101 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:08:01,102 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:08:01,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--smsc--smc91c92_cs.ko-entry_point.cil.out.i [2021-11-23 02:08:01,173 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/data/900b98c39/301e8625ec77491a8ea44ee5e422ae84/FLAG38dde0c79 [2021-11-23 02:08:02,189 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:08:02,191 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--smsc--smc91c92_cs.ko-entry_point.cil.out.i [2021-11-23 02:08:02,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/data/900b98c39/301e8625ec77491a8ea44ee5e422ae84/FLAG38dde0c79 [2021-11-23 02:08:02,528 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/data/900b98c39/301e8625ec77491a8ea44ee5e422ae84 [2021-11-23 02:08:02,530 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:08:02,531 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:08:02,533 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:08:02,533 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:08:02,536 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:08:02,537 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:02" (1/1) ... [2021-11-23 02:08:02,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f3ba0fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:02, skipping insertion in model container [2021-11-23 02:08:02,539 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:02" (1/1) ... [2021-11-23 02:08:02,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:08:02,716 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:08:04,994 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_bac353ae-545f-4079-8bc1-e32508fd8b0a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--smsc--smc91c92_cs.ko-entry_point.cil.out.i[290722,290735] [2021-11-23 02:08:05,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:08:05,117 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:08:05,643 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_bac353ae-545f-4079-8bc1-e32508fd8b0a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--smsc--smc91c92_cs.ko-entry_point.cil.out.i[290722,290735] [2021-11-23 02:08:05,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:08:05,923 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:08:05,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05 WrapperNode [2021-11-23 02:08:05,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:08:05,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:08:05,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:08:05,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:08:05,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,326 INFO L137 Inliner]: procedures = 235, calls = 2206, calls flagged for inlining = 117, calls inlined = 113, statements flattened = 5018 [2021-11-23 02:08:06,326 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:08:06,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:08:06,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:08:06,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:08:06,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,578 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:08:06,638 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:08:06,638 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:08:06,639 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:08:06,640 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (1/1) ... [2021-11-23 02:08:06,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:08:06,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:06,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:08:06,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bac353ae-545f-4079-8bc1-e32508fd8b0a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:08:06,746 INFO L130 BoogieDeclarations]: Found specification of procedure smc_ioctl [2021-11-23 02:08:06,746 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_ioctl [2021-11-23 02:08:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_write [2021-11-23 02:08:06,747 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_write [2021-11-23 02:08:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 02:08:06,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 02:08:06,747 INFO L130 BoogieDeclarations]: Found specification of procedure smc_hardware_send_packet [2021-11-23 02:08:06,748 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_hardware_send_packet [2021-11-23 02:08:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 02:08:06,748 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 02:08:06,748 INFO L130 BoogieDeclarations]: Found specification of procedure smc91c92_detach [2021-11-23 02:08:06,748 INFO L138 BoogieDeclarations]: Found implementation of procedure smc91c92_detach [2021-11-23 02:08:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-11-23 02:08:06,749 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-11-23 02:08:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-23 02:08:06,749 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-23 02:08:06,749 INFO L130 BoogieDeclarations]: Found specification of procedure mhz_3288_power [2021-11-23 02:08:06,749 INFO L138 BoogieDeclarations]: Found implementation of procedure mhz_3288_power [2021-11-23 02:08:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-23 02:08:06,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-23 02:08:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:08:06,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:08:06,750 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_request_io [2021-11-23 02:08:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_request_io [2021-11-23 02:08:06,751 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2021-11-23 02:08:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2021-11-23 02:08:06,751 INFO L130 BoogieDeclarations]: Found specification of procedure osi_load_firmware [2021-11-23 02:08:06,751 INFO L138 BoogieDeclarations]: Found implementation of procedure osi_load_firmware [2021-11-23 02:08:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:08:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:08:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:08:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:08:06,752 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 02:08:06,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 02:08:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-23 02:08:06,753 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-23 02:08:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure smc_set_xcvr [2021-11-23 02:08:06,753 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_set_xcvr [2021-11-23 02:08:06,753 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2021-11-23 02:08:06,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2021-11-23 02:08:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure netif_start_queue [2021-11-23 02:08:06,754 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_start_queue [2021-11-23 02:08:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:08:06,754 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2021-11-23 02:08:06,755 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2021-11-23 02:08:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-23 02:08:06,755 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-23 02:08:06,755 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-23 02:08:06,755 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-23 02:08:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:08:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-23 02:08:06,756 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-23 02:08:06,756 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:08:06,756 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:08:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure mot_config [2021-11-23 02:08:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure mot_config [2021-11-23 02:08:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure smc91c92_resume [2021-11-23 02:08:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure smc91c92_resume [2021-11-23 02:08:06,757 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-23 02:08:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-23 02:08:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-23 02:08:06,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-23 02:08:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 02:08:06,758 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 02:08:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:08:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:08:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure smc91c92_suspend [2021-11-23 02:08:06,759 INFO L138 BoogieDeclarations]: Found implementation of procedure smc91c92_suspend [2021-11-23 02:08:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure check_sig [2021-11-23 02:08:06,759 INFO L138 BoogieDeclarations]: Found implementation of procedure check_sig [2021-11-23 02:08:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-23 02:08:06,760 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-23 02:08:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-23 02:08:06,760 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-23 02:08:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-23 02:08:06,760 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-23 02:08:06,761 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-23 02:08:06,761 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-23 02:08:06,761 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-23 02:08:06,761 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-23 02:08:06,761 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-23 02:08:06,761 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-23 02:08:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_sync [2021-11-23 02:08:06,762 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_sync [2021-11-23 02:08:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:08:06,762 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-23 02:08:06,762 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-23 02:08:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure free_netdev [2021-11-23 02:08:06,763 INFO L138 BoogieDeclarations]: Found implementation of procedure free_netdev [2021-11-23 02:08:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:08:06,763 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:08:06,763 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-23 02:08:06,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-23 02:08:06,764 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2021-11-23 02:08:06,764 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2021-11-23 02:08:06,764 INFO L130 BoogieDeclarations]: Found specification of procedure cvt_ascii_address [2021-11-23 02:08:06,764 INFO L138 BoogieDeclarations]: Found implementation of procedure cvt_ascii_address [2021-11-23 02:08:06,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:08:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure __bitrev16 [2021-11-23 02:08:06,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __bitrev16 [2021-11-23 02:08:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_loop_tuple [2021-11-23 02:08:06,765 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_loop_tuple [2021-11-23 02:08:06,765 INFO L130 BoogieDeclarations]: Found specification of procedure smc91c92_release [2021-11-23 02:08:06,765 INFO L138 BoogieDeclarations]: Found implementation of procedure smc91c92_release [2021-11-23 02:08:06,766 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:08:06,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:08:06,766 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 02:08:06,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 02:08:06,766 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:08:06,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 02:08:06,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 02:08:06,767 INFO L130 BoogieDeclarations]: Found specification of procedure __bitrev8 [2021-11-23 02:08:06,767 INFO L138 BoogieDeclarations]: Found implementation of procedure __bitrev8 [2021-11-23 02:08:06,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:08:06,768 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:08:06,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:08:06,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:08:06,768 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_loop_config [2021-11-23 02:08:06,768 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_loop_config [2021-11-23 02:08:06,768 INFO L130 BoogieDeclarations]: Found specification of procedure s9k_config [2021-11-23 02:08:06,769 INFO L138 BoogieDeclarations]: Found implementation of procedure s9k_config [2021-11-23 02:08:06,769 INFO L130 BoogieDeclarations]: Found specification of procedure smc_tx_timeout [2021-11-23 02:08:06,769 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_tx_timeout [2021-11-23 02:08:06,769 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-23 02:08:06,769 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-23 02:08:06,770 INFO L130 BoogieDeclarations]: Found specification of procedure smc_reset [2021-11-23 02:08:06,770 INFO L138 BoogieDeclarations]: Found implementation of procedure smc_reset [2021-11-23 02:08:06,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:08:06,770 INFO L130 BoogieDeclarations]: Found specification of procedure writeb [2021-11-23 02:08:06,770 INFO L138 BoogieDeclarations]: Found implementation of procedure writeb [2021-11-23 02:08:06,770 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-23 02:08:06,771 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-23 02:08:06,771 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_netdev [2021-11-23 02:08:06,771 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_netdev [2021-11-23 02:08:06,771 INFO L130 BoogieDeclarations]: Found specification of procedure mdio_read [2021-11-23 02:08:06,771 INFO L138 BoogieDeclarations]: Found implementation of procedure mdio_read [2021-11-23 02:08:06,771 INFO L130 BoogieDeclarations]: Found specification of procedure readb [2021-11-23 02:08:06,772 INFO L138 BoogieDeclarations]: Found implementation of procedure readb [2021-11-23 02:08:06,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:08:06,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:08:07,602 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:08:07,605 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:08:08,868 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 02:08:15,993 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:08:17,140 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:08:17,141 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:08:17,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:17 BoogieIcfgContainer [2021-11-23 02:08:17,147 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:08:17,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:08:17,149 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:08:17,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:08:17,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:08:02" (1/3) ... [2021-11-23 02:08:17,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd12ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:08:17, skipping insertion in model container [2021-11-23 02:08:17,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:05" (2/3) ... [2021-11-23 02:08:17,154 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fd12ac7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:08:17, skipping insertion in model container [2021-11-23 02:08:17,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:17" (3/3) ... [2021-11-23 02:08:17,157 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--smsc--smc91c92_cs.ko-entry_point.cil.out.i [2021-11-23 02:08:17,163 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:08:17,163 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:08:17,232 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:08:17,238 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=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:08:17,239 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:08:17,289 INFO L276 IsEmpty]: Start isEmpty. Operand has 1159 states, 676 states have (on average 1.3387573964497042) internal successors, (905), 709 states have internal predecessors, (905), 418 states have call successors, (418), 64 states have call predecessors, (418), 63 states have return successors, (412), 405 states have call predecessors, (412), 412 states have call successors, (412) [2021-11-23 02:08:17,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-23 02:08:17,347 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:17,349 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:17,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:17,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:17,358 INFO L85 PathProgramCache]: Analyzing trace with hash -2004541049, now seen corresponding path program 1 times [2021-11-23 02:08:17,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:17,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287068623] [2021-11-23 02:08:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:17,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 02:08:18,609 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:18,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287068623] [2021-11-23 02:08:18,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287068623] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:18,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:18,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:08:18,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936832437] [2021-11-23 02:08:18,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:18,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:08:18,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:18,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:08:18,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:08:18,675 INFO L87 Difference]: Start difference. First operand has 1159 states, 676 states have (on average 1.3387573964497042) internal successors, (905), 709 states have internal predecessors, (905), 418 states have call successors, (418), 64 states have call predecessors, (418), 63 states have return successors, (412), 405 states have call predecessors, (412), 412 states have call successors, (412) Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 02:08:20,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:28,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:28,786 INFO L93 Difference]: Finished difference Result 4572 states and 6871 transitions. [2021-11-23 02:08:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:08:28,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 232 [2021-11-23 02:08:28,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:28,850 INFO L225 Difference]: With dead ends: 4572 [2021-11-23 02:08:28,850 INFO L226 Difference]: Without dead ends: 3396 [2021-11-23 02:08:28,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:08:28,872 INFO L933 BasicCegarLoop]: 2354 mSDtfsCounter, 4281 mSDsluCounter, 2615 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 816 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4281 SdHoareTripleChecker+Valid, 4605 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:28,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4281 Valid, 4605 Invalid, 2195 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [816 Valid, 1378 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-11-23 02:08:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3396 states. [2021-11-23 02:08:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3396 to 3384. [2021-11-23 02:08:29,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 1989 states have (on average 1.3257918552036199) internal successors, (2637), 2058 states have internal predecessors, (2637), 1212 states have call successors, (1212), 183 states have call predecessors, (1212), 182 states have return successors, (1211), 1192 states have call predecessors, (1211), 1211 states have call successors, (1211) [2021-11-23 02:08:29,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 5060 transitions. [2021-11-23 02:08:29,390 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 5060 transitions. Word has length 232 [2021-11-23 02:08:29,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:29,391 INFO L470 AbstractCegarLoop]: Abstraction has 3384 states and 5060 transitions. [2021-11-23 02:08:29,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 02:08:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 5060 transitions. [2021-11-23 02:08:29,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-11-23 02:08:29,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:29,408 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:29,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:08:29,409 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:29,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:29,410 INFO L85 PathProgramCache]: Analyzing trace with hash 309576287, now seen corresponding path program 1 times [2021-11-23 02:08:29,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:29,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131063264] [2021-11-23 02:08:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:29,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 02:08:29,780 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:29,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131063264] [2021-11-23 02:08:29,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131063264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:29,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:29,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:08:29,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544075920] [2021-11-23 02:08:29,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:29,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:08:29,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:08:29,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:08:29,786 INFO L87 Difference]: Start difference. First operand 3384 states and 5060 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 02:08:31,858 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:40,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:40,098 INFO L93 Difference]: Finished difference Result 13471 states and 20150 transitions. [2021-11-23 02:08:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:08:40,099 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 233 [2021-11-23 02:08:40,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:40,195 INFO L225 Difference]: With dead ends: 13471 [2021-11-23 02:08:40,196 INFO L226 Difference]: Without dead ends: 10106 [2021-11-23 02:08:40,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:08:40,223 INFO L933 BasicCegarLoop]: 2334 mSDtfsCounter, 4219 mSDsluCounter, 2577 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 810 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4219 SdHoareTripleChecker+Valid, 4551 SdHoareTripleChecker+Invalid, 2176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:40,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4219 Valid, 4551 Invalid, 2176 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [810 Valid, 1365 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-11-23 02:08:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-11-23 02:08:41,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 10094. [2021-11-23 02:08:41,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10094 states, 5943 states have (on average 1.325761399966347) internal successors, (7879), 6140 states have internal predecessors, (7879), 3608 states have call successors, (3608), 543 states have call predecessors, (3608), 542 states have return successors, (3607), 3556 states have call predecessors, (3607), 3607 states have call successors, (3607) [2021-11-23 02:08:41,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10094 states to 10094 states and 15094 transitions. [2021-11-23 02:08:41,354 INFO L78 Accepts]: Start accepts. Automaton has 10094 states and 15094 transitions. Word has length 233 [2021-11-23 02:08:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:41,363 INFO L470 AbstractCegarLoop]: Abstraction has 10094 states and 15094 transitions. [2021-11-23 02:08:41,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 02:08:41,366 INFO L276 IsEmpty]: Start isEmpty. Operand 10094 states and 15094 transitions. [2021-11-23 02:08:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-23 02:08:41,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:41,390 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:41,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:08:41,391 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:41,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:41,392 INFO L85 PathProgramCache]: Analyzing trace with hash -359342145, now seen corresponding path program 1 times [2021-11-23 02:08:41,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:41,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386894331] [2021-11-23 02:08:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:41,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:41,837 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 02:08:41,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:41,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386894331] [2021-11-23 02:08:41,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386894331] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:41,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:41,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:08:41,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726062514] [2021-11-23 02:08:41,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:41,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:08:41,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:41,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:08:41,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:08:41,842 INFO L87 Difference]: Start difference. First operand 10094 states and 15094 transitions. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 02:08:43,918 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:08:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:51,019 INFO L93 Difference]: Finished difference Result 40299 states and 60262 transitions. [2021-11-23 02:08:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:08:51,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 234 [2021-11-23 02:08:51,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:51,241 INFO L225 Difference]: With dead ends: 40299 [2021-11-23 02:08:51,241 INFO L226 Difference]: Without dead ends: 30224 [2021-11-23 02:08:51,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:08:51,307 INFO L933 BasicCegarLoop]: 2334 mSDtfsCounter, 3351 mSDsluCounter, 4279 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3351 SdHoareTripleChecker+Valid, 6072 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:51,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3351 Valid, 6072 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1553 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 02:08:51,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30224 states. [2021-11-23 02:08:53,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30224 to 30212. [2021-11-23 02:08:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30212 states, 17805 states have (on average 1.324964897500702) internal successors, (23591), 18374 states have internal predecessors, (23591), 10784 states have call successors, (10784), 1623 states have call predecessors, (10784), 1622 states have return successors, (10783), 10648 states have call predecessors, (10783), 10783 states have call successors, (10783) [2021-11-23 02:08:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30212 states to 30212 states and 45158 transitions. [2021-11-23 02:08:53,882 INFO L78 Accepts]: Start accepts. Automaton has 30212 states and 45158 transitions. Word has length 234 [2021-11-23 02:08:53,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:53,885 INFO L470 AbstractCegarLoop]: Abstraction has 30212 states and 45158 transitions. [2021-11-23 02:08:53,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 02:08:53,885 INFO L276 IsEmpty]: Start isEmpty. Operand 30212 states and 45158 transitions. [2021-11-23 02:08:53,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-11-23 02:08:53,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:53,905 INFO L514 BasicCegarLoop]: trace histogram [11, 7, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:53,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:08:53,905 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:08:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash 986911127, now seen corresponding path program 1 times [2021-11-23 02:08:53,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:53,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052963235] [2021-11-23 02:08:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:53,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-23 02:08:54,272 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:54,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052963235] [2021-11-23 02:08:54,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052963235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:54,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:54,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:08:54,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968308972] [2021-11-23 02:08:54,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:54,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:08:54,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:54,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:08:54,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:08:54,276 INFO L87 Difference]: Start difference. First operand 30212 states and 45158 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 02:08:56,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:09:00,220 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:09:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:06,609 INFO L93 Difference]: Finished difference Result 116927 states and 174558 transitions. [2021-11-23 02:09:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:09:06,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 235 [2021-11-23 02:09:06,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:07,354 INFO L225 Difference]: With dead ends: 116927 [2021-11-23 02:09:07,354 INFO L226 Difference]: Without dead ends: 86734 [2021-11-23 02:09:07,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:09:07,519 INFO L933 BasicCegarLoop]: 2334 mSDtfsCounter, 3350 mSDsluCounter, 4279 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3350 SdHoareTripleChecker+Valid, 6072 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:07,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3350 Valid, 6072 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1553 Invalid, 1 Unknown, 0 Unchecked, 9.9s Time] [2021-11-23 02:09:07,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86734 states. [2021-11-23 02:09:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86734 to 86668. [2021-11-23 02:09:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86668 states, 51305 states have (on average 1.3264009355813273) internal successors, (68051), 52810 states have internal predecessors, (68051), 30596 states have call successors, (30596), 4767 states have call predecessors, (30596), 4766 states have return successors, (30595), 30276 states have call predecessors, (30595), 30595 states have call successors, (30595) [2021-11-23 02:09:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86668 states to 86668 states and 129242 transitions. [2021-11-23 02:09:14,758 INFO L78 Accepts]: Start accepts. Automaton has 86668 states and 129242 transitions. Word has length 235 [2021-11-23 02:09:14,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:14,760 INFO L470 AbstractCegarLoop]: Abstraction has 86668 states and 129242 transitions. [2021-11-23 02:09:14,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-23 02:09:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 86668 states and 129242 transitions. [2021-11-23 02:09:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-11-23 02:09:15,022 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:15,023 INFO L514 BasicCegarLoop]: trace histogram [28, 15, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:15,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:09:15,024 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:15,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1241345685, now seen corresponding path program 1 times [2021-11-23 02:09:15,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:15,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500879815] [2021-11-23 02:09:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:15,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1169 trivial. 0 not checked. [2021-11-23 02:09:15,465 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500879815] [2021-11-23 02:09:15,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500879815] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:15,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:15,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:09:15,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029773307] [2021-11-23 02:09:15,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:15,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:15,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:15,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:15,470 INFO L87 Difference]: Start difference. First operand 86668 states and 129242 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2021-11-23 02:09:17,549 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:09:18,659 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:09:25,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:25,379 INFO L93 Difference]: Finished difference Result 241184 states and 358596 transitions. [2021-11-23 02:09:25,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) Word has length 432 [2021-11-23 02:09:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:26,721 INFO L225 Difference]: With dead ends: 241184 [2021-11-23 02:09:26,723 INFO L226 Difference]: Without dead ends: 154535 [2021-11-23 02:09:27,035 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:09:27,036 INFO L933 BasicCegarLoop]: 2157 mSDtfsCounter, 1334 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 3604 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:27,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 3604 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 484 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:09:27,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154535 states. [2021-11-23 02:09:35,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154535 to 154289. [2021-11-23 02:09:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154289 states, 90733 states have (on average 1.3175911741042399) internal successors, (119549), 93903 states have internal predecessors, (119549), 54753 states have call successors, (54753), 8884 states have call predecessors, (54753), 8802 states have return successors, (54752), 53709 states have call predecessors, (54752), 54752 states have call successors, (54752) [2021-11-23 02:09:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154289 states to 154289 states and 229054 transitions. [2021-11-23 02:09:36,957 INFO L78 Accepts]: Start accepts. Automaton has 154289 states and 229054 transitions. Word has length 432 [2021-11-23 02:09:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:36,961 INFO L470 AbstractCegarLoop]: Abstraction has 154289 states and 229054 transitions. [2021-11-23 02:09:36,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 2 states have call successors, (90), 2 states have call predecessors, (90), 1 states have return successors, (87), 2 states have call predecessors, (87), 2 states have call successors, (87) [2021-11-23 02:09:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 154289 states and 229054 transitions. [2021-11-23 02:09:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2021-11-23 02:09:37,266 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:37,266 INFO L514 BasicCegarLoop]: trace histogram [29, 18, 9, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:37,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:09:37,267 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:09:37,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:37,268 INFO L85 PathProgramCache]: Analyzing trace with hash -2031615035, now seen corresponding path program 1 times [2021-11-23 02:09:37,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:37,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151327337] [2021-11-23 02:09:37,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:37,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:37,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1459 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1454 trivial. 0 not checked. [2021-11-23 02:09:37,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:37,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151327337] [2021-11-23 02:09:37,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151327337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:37,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:37,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:09:37,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265597246] [2021-11-23 02:09:37,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:37,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:37,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:37,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:37,700 INFO L87 Difference]: Start difference. First operand 154289 states and 229054 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 2 states have call successors, (97), 2 states have call predecessors, (97), 1 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) [2021-11-23 02:09:39,778 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:09:50,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:50,775 INFO L93 Difference]: Finished difference Result 412020 states and 611582 transitions. [2021-11-23 02:09:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:50,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 2 states have call successors, (97), 2 states have call predecessors, (97), 1 states have return successors, (94), 2 states have call predecessors, (94), 2 states have call successors, (94) Word has length 530 [2021-11-23 02:09:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:52,736 INFO L225 Difference]: With dead ends: 412020 [2021-11-23 02:09:52,736 INFO L226 Difference]: Without dead ends: 257750 [2021-11-23 02:09:53,228 INFO L932 BasicCegarLoop]: 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 [2021-11-23 02:09:53,229 INFO L933 BasicCegarLoop]: 2292 mSDtfsCounter, 1357 mSDsluCounter, 1691 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 3802 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:53,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 3802 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 434 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 02:09:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257750 states.