./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--3com--3c589_cs.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P --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 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 01:55:00,287 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 01:55:00,290 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 01:55:00,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 01:55:00,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 01:55:00,351 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 01:55:00,353 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 01:55:00,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 01:55:00,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 01:55:00,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 01:55:00,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 01:55:00,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 01:55:00,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 01:55:00,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 01:55:00,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 01:55:00,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 01:55:00,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 01:55:00,383 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 01:55:00,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 01:55:00,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 01:55:00,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 01:55:00,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 01:55:00,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 01:55:00,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 01:55:00,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 01:55:00,411 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 01:55:00,412 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 01:55:00,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 01:55:00,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 01:55:00,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 01:55:00,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 01:55:00,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 01:55:00,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 01:55:00,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 01:55:00,423 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 01:55:00,423 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 01:55:00,424 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 01:55:00,424 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 01:55:00,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 01:55:00,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 01:55:00,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 01:55:00,427 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 01:55:00,474 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 01:55:00,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 01:55:00,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 01:55:00,475 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 01:55:00,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 01:55:00,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 01:55:00,483 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 01:55:00,483 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 01:55:00,484 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 01:55:00,484 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 01:55:00,485 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 01:55:00,485 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 01:55:00,486 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 01:55:00,486 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 01:55:00,486 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 01:55:00,486 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 01:55:00,487 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 01:55:00,487 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 01:55:00,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 01:55:00,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 01:55:00,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 01:55:00,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 01:55:00,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 01:55:00,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 01:55:00,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 01:55:00,489 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 01:55:00,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 01:55:00,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 01:55:00,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 01:55:00,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:55:00,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 01:55:00,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 01:55:00,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 01:55:00,492 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 01:55:00,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 01:55:00,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 01:55:00,492 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 01:55:00,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 01:55:00,493 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_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 [2021-11-21 01:55:00,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 01:55:00,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 01:55:00,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 01:55:00,751 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 01:55:00,752 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 01:55:00,753 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2021-11-21 01:55:00,850 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/data/57cd5f1de/002ae28e28f94112b3744d28bdd1690c/FLAG3cce947b5 [2021-11-21 01:55:01,758 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 01:55:01,759 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2021-11-21 01:55:01,814 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/data/57cd5f1de/002ae28e28f94112b3744d28bdd1690c/FLAG3cce947b5 [2021-11-21 01:55:02,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/data/57cd5f1de/002ae28e28f94112b3744d28bdd1690c [2021-11-21 01:55:02,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 01:55:02,210 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 01:55:02,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 01:55:02,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 01:55:02,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 01:55:02,230 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:02" (1/1) ... [2021-11-21 01:55:02,231 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@eab496e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:02, skipping insertion in model container [2021-11-21 01:55:02,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:55:02" (1/1) ... [2021-11-21 01:55:02,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 01:55:02,424 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 01:55:04,094 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_840c20ee-8f7f-4249-9e35-37ff9878a3fe/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2021-11-21 01:55:04,144 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:55:04,175 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 01:55:04,458 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_840c20ee-8f7f-4249-9e35-37ff9878a3fe/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i[239406,239419] [2021-11-21 01:55:04,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 01:55:04,617 INFO L208 MainTranslator]: Completed translation [2021-11-21 01:55:04,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04 WrapperNode [2021-11-21 01:55:04,618 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 01:55:04,619 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 01:55:04,619 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 01:55:04,619 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 01:55:04,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:04,761 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:04,908 INFO L137 Inliner]: procedures = 176, calls = 1181, calls flagged for inlining = 84, calls inlined = 81, statements flattened = 2539 [2021-11-21 01:55:04,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 01:55:04,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 01:55:04,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 01:55:04,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 01:55:04,919 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:04,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:04,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:04,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:05,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:05,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:05,119 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:05,153 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 01:55:05,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 01:55:05,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 01:55:05,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 01:55:05,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (1/1) ... [2021-11-21 01:55:05,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 01:55:05,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:55:05,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 01:55:05,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 01:55:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure el3_config [2021-11-21 01:55:05,259 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_config [2021-11-21 01:55:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 01:55:05,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 01:55:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 01:55:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 01:55:05,260 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 01:55:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2021-11-21 01:55:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2021-11-21 01:55:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2021-11-21 01:55:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2021-11-21 01:55:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2021-11-21 01:55:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2021-11-21 01:55:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-21 01:55:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-21 01:55:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 01:55:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 01:55:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-21 01:55:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-21 01:55:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2021-11-21 01:55:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2021-11-21 01:55:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 01:55:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 01:55:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 01:55:05,264 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2021-11-21 01:55:05,264 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2021-11-21 01:55:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 01:55:05,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 01:55:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 01:55:05,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 01:55:05,265 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 01:55:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 01:55:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 01:55:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 01:55:05,266 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2021-11-21 01:55:05,266 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2021-11-21 01:55:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 01:55:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_reset [2021-11-21 01:55:05,267 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_reset [2021-11-21 01:55:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 01:55:05,267 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2021-11-21 01:55:05,267 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2021-11-21 01:55:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_dev_present [2021-11-21 01:55:05,268 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_dev_present [2021-11-21 01:55:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 01:55:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 01:55:05,268 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2021-11-21 01:55:05,269 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2021-11-21 01:55:05,269 INFO L130 BoogieDeclarations]: Found specification of procedure el3_rx [2021-11-21 01:55:05,270 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_rx [2021-11-21 01:55:05,271 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-21 01:55:05,272 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-21 01:55:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 01:55:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2021-11-21 01:55:05,273 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2021-11-21 01:55:05,273 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-21 01:55:05,273 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-21 01:55:05,274 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_set_xcvr [2021-11-21 01:55:05,274 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_set_xcvr [2021-11-21 01:55:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_release [2021-11-21 01:55:05,275 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_release [2021-11-21 01:55:05,275 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2021-11-21 01:55:05,276 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2021-11-21 01:55:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-21 01:55:05,276 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-21 01:55:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-21 01:55:05,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-21 01:55:05,276 INFO L130 BoogieDeclarations]: Found specification of procedure el3_get_stats [2021-11-21 01:55:05,277 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_get_stats [2021-11-21 01:55:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-21 01:55:05,277 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-21 01:55:05,277 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_detach [2021-11-21 01:55:05,277 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_detach [2021-11-21 01:55:05,278 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_wait_for_completion [2021-11-21 01:55:05,279 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_wait_for_completion [2021-11-21 01:55:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 01:55:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 01:55:05,279 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2021-11-21 01:55:05,280 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2021-11-21 01:55:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-21 01:55:05,280 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-21 01:55:05,280 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2021-11-21 01:55:05,281 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2021-11-21 01:55:05,281 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2021-11-21 01:55:05,282 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2021-11-21 01:55:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2021-11-21 01:55:05,282 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2021-11-21 01:55:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-21 01:55:05,283 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-21 01:55:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2021-11-21 01:55:05,284 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2021-11-21 01:55:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-21 01:55:05,285 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-21 01:55:05,285 INFO L130 BoogieDeclarations]: Found specification of procedure pop_tx_status [2021-11-21 01:55:05,286 INFO L138 BoogieDeclarations]: Found implementation of procedure pop_tx_status [2021-11-21 01:55:05,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 01:55:05,286 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2021-11-21 01:55:05,286 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2021-11-21 01:55:05,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 01:55:05,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 01:55:05,287 INFO L130 BoogieDeclarations]: Found specification of procedure el3_tx_timeout [2021-11-21 01:55:05,287 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_tx_timeout [2021-11-21 01:55:05,879 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 01:55:05,885 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 01:55:06,539 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 01:55:12,776 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 01:55:13,271 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 01:55:13,271 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 01:55:13,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:13 BoogieIcfgContainer [2021-11-21 01:55:13,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 01:55:13,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 01:55:13,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 01:55:13,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 01:55:13,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:55:02" (1/3) ... [2021-11-21 01:55:13,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4541a3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:13, skipping insertion in model container [2021-11-21 01:55:13,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:55:04" (2/3) ... [2021-11-21 01:55:13,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4541a3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:55:13, skipping insertion in model container [2021-11-21 01:55:13,286 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:55:13" (3/3) ... [2021-11-21 01:55:13,288 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2021-11-21 01:55:13,293 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 01:55:13,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 01:55:13,364 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 01:55:13,381 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 [2021-11-21 01:55:13,382 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 01:55:13,433 INFO L276 IsEmpty]: Start isEmpty. Operand has 680 states, 397 states have (on average 1.3904282115869018) internal successors, (552), 435 states have internal predecessors, (552), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) [2021-11-21 01:55:13,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-21 01:55:13,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:13,479 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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] [2021-11-21 01:55:13,480 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:13,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1455809590, now seen corresponding path program 1 times [2021-11-21 01:55:13,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:13,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117387745] [2021-11-21 01:55:13,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:13,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:14,331 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-21 01:55:14,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:14,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117387745] [2021-11-21 01:55:14,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117387745] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:14,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:14,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:55:14,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318461498] [2021-11-21 01:55:14,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:14,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:55:14,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:14,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:55:14,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:55:14,373 INFO L87 Difference]: Start difference. First operand has 680 states, 397 states have (on average 1.3904282115869018) internal successors, (552), 435 states have internal predecessors, (552), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:55:16,432 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:18,727 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:21,682 INFO L93 Difference]: Finished difference Result 2591 states and 3909 transitions. [2021-11-21 01:55:21,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:55:21,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 150 [2021-11-21 01:55:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:21,726 INFO L225 Difference]: With dead ends: 2591 [2021-11-21 01:55:21,726 INFO L226 Difference]: Without dead ends: 1887 [2021-11-21 01:55:21,738 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 [2021-11-21 01:55:21,742 INFO L933 BasicCegarLoop]: 1404 mSDtfsCounter, 2314 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 426 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2314 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 1168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:21,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2314 Valid, 2725 Invalid, 1168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 740 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 01:55:21,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1887 states. [2021-11-21 01:55:21,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1887 to 1871. [2021-11-21 01:55:21,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1096 states have (on average 1.3613138686131387) internal successors, (1492), 1182 states have internal predecessors, (1492), 651 states have call successors, (651), 124 states have call predecessors, (651), 123 states have return successors, (650), 623 states have call predecessors, (650), 650 states have call successors, (650) [2021-11-21 01:55:21,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2793 transitions. [2021-11-21 01:55:21,988 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2793 transitions. Word has length 150 [2021-11-21 01:55:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:21,989 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2793 transitions. [2021-11-21 01:55:21,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:55:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2793 transitions. [2021-11-21 01:55:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-21 01:55:22,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:22,004 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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] [2021-11-21 01:55:22,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 01:55:22,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:22,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:22,006 INFO L85 PathProgramCache]: Analyzing trace with hash -768408791, now seen corresponding path program 1 times [2021-11-21 01:55:22,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:22,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610171523] [2021-11-21 01:55:22,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:22,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-21 01:55:22,306 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:22,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610171523] [2021-11-21 01:55:22,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610171523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:22,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:22,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:55:22,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072157570] [2021-11-21 01:55:22,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:22,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:55:22,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:55:22,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:55:22,319 INFO L87 Difference]: Start difference. First operand 1871 states and 2793 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:55:24,359 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:26,609 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:29,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:29,563 INFO L93 Difference]: Finished difference Result 7354 states and 10974 transitions. [2021-11-21 01:55:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:55:29,564 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 147 [2021-11-21 01:55:29,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:29,627 INFO L225 Difference]: With dead ends: 7354 [2021-11-21 01:55:29,627 INFO L226 Difference]: Without dead ends: 5495 [2021-11-21 01:55:29,641 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 [2021-11-21 01:55:29,644 INFO L933 BasicCegarLoop]: 1395 mSDtfsCounter, 2259 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 419 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2259 SdHoareTripleChecker+Valid, 2682 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 419 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:29,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2259 Valid, 2682 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [419 Valid, 729 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2021-11-21 01:55:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5495 states. [2021-11-21 01:55:30,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5495 to 5481. [2021-11-21 01:55:30,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5481 states, 3210 states have (on average 1.3588785046728973) internal successors, (4362), 3460 states have internal predecessors, (4362), 1907 states have call successors, (1907), 364 states have call predecessors, (1907), 363 states have return successors, (1906), 1829 states have call predecessors, (1906), 1906 states have call successors, (1906) [2021-11-21 01:55:30,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5481 states to 5481 states and 8175 transitions. [2021-11-21 01:55:30,239 INFO L78 Accepts]: Start accepts. Automaton has 5481 states and 8175 transitions. Word has length 147 [2021-11-21 01:55:30,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:30,241 INFO L470 AbstractCegarLoop]: Abstraction has 5481 states and 8175 transitions. [2021-11-21 01:55:30,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:55:30,241 INFO L276 IsEmpty]: Start isEmpty. Operand 5481 states and 8175 transitions. [2021-11-21 01:55:30,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-21 01:55:30,258 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:30,259 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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] [2021-11-21 01:55:30,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 01:55:30,259 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:30,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1518956801, now seen corresponding path program 1 times [2021-11-21 01:55:30,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:30,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253546002] [2021-11-21 01:55:30,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:30,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:30,546 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-21 01:55:30,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:30,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253546002] [2021-11-21 01:55:30,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253546002] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:30,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:30,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:55:30,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879885173] [2021-11-21 01:55:30,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:30,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:55:30,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:55:30,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:55:30,559 INFO L87 Difference]: Start difference. First operand 5481 states and 8175 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:55:32,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:34,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:37,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:37,764 INFO L93 Difference]: Finished difference Result 21782 states and 32478 transitions. [2021-11-21 01:55:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:55:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 149 [2021-11-21 01:55:37,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:37,914 INFO L225 Difference]: With dead ends: 21782 [2021-11-21 01:55:37,914 INFO L226 Difference]: Without dead ends: 16313 [2021-11-21 01:55:37,950 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 [2021-11-21 01:55:37,955 INFO L933 BasicCegarLoop]: 1419 mSDtfsCounter, 2254 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 418 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2254 SdHoareTripleChecker+Valid, 2706 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:37,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2254 Valid, 2706 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 730 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-11-21 01:55:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16313 states. [2021-11-21 01:55:39,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16313 to 16299. [2021-11-21 01:55:39,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16299 states, 9552 states have (on average 1.356574539363484) internal successors, (12958), 10282 states have internal predecessors, (12958), 5663 states have call successors, (5663), 1084 states have call predecessors, (5663), 1083 states have return successors, (5662), 5447 states have call predecessors, (5662), 5662 states have call successors, (5662) [2021-11-21 01:55:39,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16299 states to 16299 states and 24283 transitions. [2021-11-21 01:55:39,384 INFO L78 Accepts]: Start accepts. Automaton has 16299 states and 24283 transitions. Word has length 149 [2021-11-21 01:55:39,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:39,387 INFO L470 AbstractCegarLoop]: Abstraction has 16299 states and 24283 transitions. [2021-11-21 01:55:39,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 4 states have internal predecessors, (60), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:55:39,388 INFO L276 IsEmpty]: Start isEmpty. Operand 16299 states and 24283 transitions. [2021-11-21 01:55:39,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-21 01:55:39,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:39,409 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 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] [2021-11-21 01:55:39,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 01:55:39,409 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:39,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1621563550, now seen corresponding path program 1 times [2021-11-21 01:55:39,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:39,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922057444] [2021-11-21 01:55:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:39,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-21 01:55:39,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:39,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922057444] [2021-11-21 01:55:39,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922057444] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:39,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:39,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 01:55:39,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761674579] [2021-11-21 01:55:39,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:39,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 01:55:39,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:39,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 01:55:39,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-21 01:55:39,787 INFO L87 Difference]: Start difference. First operand 16299 states and 24283 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:55:41,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:44,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:55:48,157 INFO L93 Difference]: Finished difference Result 62426 states and 92806 transitions. [2021-11-21 01:55:48,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 01:55:48,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 148 [2021-11-21 01:55:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:55:48,437 INFO L225 Difference]: With dead ends: 62426 [2021-11-21 01:55:48,438 INFO L226 Difference]: Without dead ends: 46139 [2021-11-21 01:55:48,621 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 [2021-11-21 01:55:48,626 INFO L933 BasicCegarLoop]: 1664 mSDtfsCounter, 2151 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 363 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2151 SdHoareTripleChecker+Valid, 2951 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:55:48,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2151 Valid, 2951 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 780 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 01:55:48,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46139 states. [2021-11-21 01:55:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46139 to 46125. [2021-11-21 01:55:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46125 states, 27122 states have (on average 1.3539561979205073) internal successors, (36722), 29016 states have internal predecessors, (36722), 15871 states have call successors, (15871), 3132 states have call predecessors, (15871), 3131 states have return successors, (15870), 15309 states have call predecessors, (15870), 15870 states have call successors, (15870) [2021-11-21 01:55:52,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46125 states to 46125 states and 68463 transitions. [2021-11-21 01:55:52,570 INFO L78 Accepts]: Start accepts. Automaton has 46125 states and 68463 transitions. Word has length 148 [2021-11-21 01:55:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:55:52,570 INFO L470 AbstractCegarLoop]: Abstraction has 46125 states and 68463 transitions. [2021-11-21 01:55:52,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 01:55:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 46125 states and 68463 transitions. [2021-11-21 01:55:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-21 01:55:52,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:55:52,641 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 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] [2021-11-21 01:55:52,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 01:55:52,642 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:55:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:55:52,644 INFO L85 PathProgramCache]: Analyzing trace with hash 830720821, now seen corresponding path program 1 times [2021-11-21 01:55:52,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:55:52,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424682427] [2021-11-21 01:55:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:55:52,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:55:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:55:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-21 01:55:52,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:55:52,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424682427] [2021-11-21 01:55:52,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424682427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:55:52,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:55:52,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:55:52,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473846014] [2021-11-21 01:55:52,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:55:52,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:55:52,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:55:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:55:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:55:52,860 INFO L87 Difference]: Start difference. First operand 46125 states and 68463 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 01:55:54,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:55:57,074 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:00,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:00,395 INFO L93 Difference]: Finished difference Result 134824 states and 200426 transitions. [2021-11-21 01:56:00,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:56:00,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 183 [2021-11-21 01:56:00,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:00,949 INFO L225 Difference]: With dead ends: 134824 [2021-11-21 01:56:00,950 INFO L226 Difference]: Without dead ends: 88711 [2021-11-21 01:56:01,185 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 [2021-11-21 01:56:01,190 INFO L933 BasicCegarLoop]: 1240 mSDtfsCounter, 843 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:01,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 2120 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2021-11-21 01:56:01,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88711 states. [2021-11-21 01:56:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88711 to 88708. [2021-11-21 01:56:06,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88708 states, 51938 states have (on average 1.3522469097770418) internal successors, (70233), 55646 states have internal predecessors, (70233), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2021-11-21 01:56:07,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88708 states to 88708 states and 131898 transitions. [2021-11-21 01:56:07,408 INFO L78 Accepts]: Start accepts. Automaton has 88708 states and 131898 transitions. Word has length 183 [2021-11-21 01:56:07,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:07,409 INFO L470 AbstractCegarLoop]: Abstraction has 88708 states and 131898 transitions. [2021-11-21 01:56:07,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 01:56:07,409 INFO L276 IsEmpty]: Start isEmpty. Operand 88708 states and 131898 transitions. [2021-11-21 01:56:07,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-21 01:56:07,613 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:07,613 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 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] [2021-11-21 01:56:07,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 01:56:07,614 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:07,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash 532037431, now seen corresponding path program 1 times [2021-11-21 01:56:07,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:07,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836417467] [2021-11-21 01:56:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:07,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:07,871 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-21 01:56:07,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:07,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836417467] [2021-11-21 01:56:07,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836417467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:07,874 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:07,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:56:07,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398210209] [2021-11-21 01:56:07,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:07,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:56:07,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:07,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:56:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:56:07,877 INFO L87 Difference]: Start difference. First operand 88708 states and 131898 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 01:56:09,926 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:12,039 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:15,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:15,292 INFO L93 Difference]: Finished difference Result 113459 states and 169923 transitions. [2021-11-21 01:56:15,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:56:15,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 205 [2021-11-21 01:56:15,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:15,830 INFO L225 Difference]: With dead ends: 113459 [2021-11-21 01:56:15,831 INFO L226 Difference]: Without dead ends: 95168 [2021-11-21 01:56:15,937 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 [2021-11-21 01:56:15,939 INFO L933 BasicCegarLoop]: 1229 mSDtfsCounter, 272 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:15,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [349 Valid, 2179 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 01:56:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95168 states. [2021-11-21 01:56:19,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95168 to 88709. [2021-11-21 01:56:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88709 states, 51939 states have (on average 1.3522401278422764) internal successors, (70234), 55647 states have internal predecessors, (70234), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2021-11-21 01:56:20,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88709 states to 88709 states and 131899 transitions. [2021-11-21 01:56:20,990 INFO L78 Accepts]: Start accepts. Automaton has 88709 states and 131899 transitions. Word has length 205 [2021-11-21 01:56:20,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:20,991 INFO L470 AbstractCegarLoop]: Abstraction has 88709 states and 131899 transitions. [2021-11-21 01:56:20,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 01:56:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 88709 states and 131899 transitions. [2021-11-21 01:56:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-21 01:56:21,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:21,124 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 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] [2021-11-21 01:56:21,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 01:56:21,124 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:21,125 INFO L85 PathProgramCache]: Analyzing trace with hash 24535647, now seen corresponding path program 1 times [2021-11-21 01:56:21,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:21,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492275307] [2021-11-21 01:56:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:21,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-11-21 01:56:21,373 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:21,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492275307] [2021-11-21 01:56:21,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492275307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:21,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 01:56:21,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 01:56:21,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530537707] [2021-11-21 01:56:21,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:21,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:56:21,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:21,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:56:21,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 01:56:21,376 INFO L87 Difference]: Start difference. First operand 88709 states and 131899 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 01:56:23,414 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:25,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:28,657 INFO L93 Difference]: Finished difference Result 113445 states and 169898 transitions. [2021-11-21 01:56:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:56:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) Word has length 207 [2021-11-21 01:56:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:29,127 INFO L225 Difference]: With dead ends: 113445 [2021-11-21 01:56:29,128 INFO L226 Difference]: Without dead ends: 95153 [2021-11-21 01:56:29,224 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 [2021-11-21 01:56:29,225 INFO L933 BasicCegarLoop]: 1224 mSDtfsCounter, 257 mSDsluCounter, 1032 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 2162 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:29,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 2162 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 01:56:29,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95153 states. [2021-11-21 01:56:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95153 to 88715. [2021-11-21 01:56:33,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88715 states, 51945 states have (on average 1.3522379439792087) internal successors, (70242), 55653 states have internal predecessors, (70242), 30833 states have call successors, (30833), 5937 states have call predecessors, (30833), 5936 states have return successors, (30832), 29790 states have call predecessors, (30832), 30832 states have call successors, (30832) [2021-11-21 01:56:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88715 states to 88715 states and 131907 transitions. [2021-11-21 01:56:33,745 INFO L78 Accepts]: Start accepts. Automaton has 88715 states and 131907 transitions. Word has length 207 [2021-11-21 01:56:33,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:33,746 INFO L470 AbstractCegarLoop]: Abstraction has 88715 states and 131907 transitions. [2021-11-21 01:56:33,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (27), 2 states have call predecessors, (27), 2 states have call successors, (27) [2021-11-21 01:56:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 88715 states and 131907 transitions. [2021-11-21 01:56:33,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-21 01:56:33,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:33,906 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 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] [2021-11-21 01:56:33,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 01:56:33,906 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:33,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash 770590465, now seen corresponding path program 1 times [2021-11-21 01:56:33,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:33,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041985921] [2021-11-21 01:56:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:33,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:34,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-21 01:56:34,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:34,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041985921] [2021-11-21 01:56:34,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041985921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:56:34,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993477217] [2021-11-21 01:56:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:34,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:34,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:34,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:34,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 01:56:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:34,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 3064 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:56:34,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-21 01:56:35,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:56:35,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993477217] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:35,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:56:35,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-21 01:56:35,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581116708] [2021-11-21 01:56:35,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:35,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:56:35,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:35,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:56:35,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:56:35,388 INFO L87 Difference]: Start difference. First operand 88715 states and 131907 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 01:56:37,418 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:39,525 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:43,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 01:56:43,039 INFO L93 Difference]: Finished difference Result 124969 states and 185995 transitions. [2021-11-21 01:56:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 01:56:43,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) Word has length 208 [2021-11-21 01:56:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 01:56:43,510 INFO L225 Difference]: With dead ends: 124969 [2021-11-21 01:56:43,510 INFO L226 Difference]: Without dead ends: 106671 [2021-11-21 01:56:43,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:56:43,597 INFO L933 BasicCegarLoop]: 1127 mSDtfsCounter, 910 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 2020 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-21 01:56:43,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 2020 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2021-11-21 01:56:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106671 states. [2021-11-21 01:56:47,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106671 to 106646. [2021-11-21 01:56:48,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106646 states, 62434 states have (on average 1.352948713841817) internal successors, (84470), 66913 states have internal predecessors, (84470), 37085 states have call successors, (37085), 7127 states have call predecessors, (37085), 7126 states have return successors, (37084), 35827 states have call predecessors, (37084), 37084 states have call successors, (37084) [2021-11-21 01:56:48,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106646 states to 106646 states and 158639 transitions. [2021-11-21 01:56:48,500 INFO L78 Accepts]: Start accepts. Automaton has 106646 states and 158639 transitions. Word has length 208 [2021-11-21 01:56:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 01:56:48,500 INFO L470 AbstractCegarLoop]: Abstraction has 106646 states and 158639 transitions. [2021-11-21 01:56:48,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 01:56:48,501 INFO L276 IsEmpty]: Start isEmpty. Operand 106646 states and 158639 transitions. [2021-11-21 01:56:48,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-21 01:56:48,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 01:56:48,570 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 3, 3, 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] [2021-11-21 01:56:48,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 01:56:48,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:48,786 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 01:56:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 01:56:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash 2085900230, now seen corresponding path program 1 times [2021-11-21 01:56:48,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 01:56:48,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037195878] [2021-11-21 01:56:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:48,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 01:56:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-21 01:56:49,025 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 01:56:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037195878] [2021-11-21 01:56:49,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037195878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 01:56:49,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062239356] [2021-11-21 01:56:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 01:56:49,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 01:56:49,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 01:56:49,027 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 01:56:49,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_840c20ee-8f7f-4249-9e35-37ff9878a3fe/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 01:56:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 01:56:49,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 3066 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-21 01:56:49,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 01:56:50,257 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-21 01:56:50,257 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 01:56:50,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062239356] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 01:56:50,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 01:56:50,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-21 01:56:50,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910168589] [2021-11-21 01:56:50,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 01:56:50,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 01:56:50,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 01:56:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 01:56:50,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-21 01:56:50,259 INFO L87 Difference]: Start difference. First operand 106646 states and 158639 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (29), 3 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 01:56:52,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 01:56:54,389 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []