./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/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_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 06:53:41,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:53:41,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:53:41,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:53:41,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:53:41,561 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:53:41,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:53:41,564 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:53:41,566 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:53:41,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:53:41,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:53:41,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:53:41,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:53:41,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:53:41,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:53:41,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:53:41,577 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:53:41,578 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:53:41,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:53:41,581 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:53:41,583 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:53:41,590 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:53:41,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:53:41,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:53:41,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:53:41,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:53:41,607 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:53:41,608 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:53:41,609 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:53:41,610 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:53:41,610 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:53:41,611 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:53:41,613 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:53:41,614 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:53:41,616 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:53:41,617 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:53:41,618 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:53:41,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:53:41,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:53:41,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:53:41,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:53:41,621 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-19 06:53:41,670 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:53:41,671 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:53:41,671 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:53:41,671 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:53:41,672 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:53:41,672 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:53:41,673 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:53:41,673 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:53:41,673 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:53:41,673 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:53:41,674 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:53:41,674 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:53:41,674 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:53:41,674 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:53:41,675 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:53:41,675 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:53:41,675 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:53:41,675 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:53:41,676 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:53:41,676 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:53:41,677 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:53:41,677 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:53:41,677 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:53:41,677 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:53:41,678 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:53:41,678 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:53:41,678 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:53:41,678 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:53:41,679 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:53:41,679 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:53:41,679 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:53:41,680 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:53:41,680 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:53:41,680 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:53:41,680 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:53:41,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:53:41,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:53:41,681 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:53:41,681 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 [2022-11-19 06:53:41,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:53:41,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:53:41,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:53:41,960 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:53:41,961 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:53:41,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/../../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 [2022-11-19 06:53:42,025 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/data/9c0179cc5/2ac6f96a634b4fc7beab0c622c9e1122/FLAG2251621d7 [2022-11-19 06:53:42,901 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:53:42,901 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/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 [2022-11-19 06:53:42,943 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/data/9c0179cc5/2ac6f96a634b4fc7beab0c622c9e1122/FLAG2251621d7 [2022-11-19 06:53:43,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/data/9c0179cc5/2ac6f96a634b4fc7beab0c622c9e1122 [2022-11-19 06:53:43,350 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:53:43,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:53:43,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:53:43,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:53:43,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:53:43,359 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:53:43" (1/1) ... [2022-11-19 06:53:43,361 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60147cb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:43, skipping insertion in model container [2022-11-19 06:53:43,361 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:53:43" (1/1) ... [2022-11-19 06:53:43,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:53:43,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:53:44,996 WARN L234 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_a1779424-9026-4988-be88-d5436acfc353/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] [2022-11-19 06:53:45,064 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:53:45,101 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:53:45,426 WARN L234 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_a1779424-9026-4988-be88-d5436acfc353/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] [2022-11-19 06:53:45,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:53:45,615 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:53:45,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45 WrapperNode [2022-11-19 06:53:45,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:53:45,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:53:45,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:53:45,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:53:45,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:45,716 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:45,868 INFO L138 Inliner]: procedures = 176, calls = 1205, calls flagged for inlining = 84, calls inlined = 81, statements flattened = 2575 [2022-11-19 06:53:45,869 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:53:45,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:53:45,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:53:45,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:53:45,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:45,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:45,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:45,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:46,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:46,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:46,051 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:46,064 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:46,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:53:46,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:53:46,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:53:46,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:53:46,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (1/1) ... [2022-11-19 06:53:46,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:53:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:53:46,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:53:46,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a1779424-9026-4988-be88-d5436acfc353/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:53:46,192 INFO L130 BoogieDeclarations]: Found specification of procedure el3_config [2022-11-19 06:53:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_config [2022-11-19 06:53:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-19 06:53:46,193 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-19 06:53:46,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:53:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-19 06:53:46,194 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-19 06:53:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2022-11-19 06:53:46,194 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2022-11-19 06:53:46,194 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-19 06:53:46,195 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-19 06:53:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-19 06:53:46,195 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-19 06:53:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-19 06:53:46,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-19 06:53:46,195 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-19 06:53:46,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-19 06:53:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-19 06:53:46,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-19 06:53:46,196 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-11-19 06:53:46,196 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-11-19 06:53:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-19 06:53:46,197 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-19 06:53:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:53:46,197 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2022-11-19 06:53:46,197 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2022-11-19 06:53:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-19 06:53:46,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-19 06:53:46,198 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-19 06:53:46,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-19 06:53:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-19 06:53:46,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-19 06:53:46,199 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:53:46,199 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:53:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-19 06:53:46,200 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-19 06:53:46,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 06:53:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_reset [2022-11-19 06:53:46,201 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_reset [2022-11-19 06:53:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:53:46,201 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-11-19 06:53:46,202 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-11-19 06:53:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_dev_present [2022-11-19 06:53:46,202 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_dev_present [2022-11-19 06:53:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:53:46,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 06:53:46,203 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2022-11-19 06:53:46,203 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2022-11-19 06:53:46,204 INFO L130 BoogieDeclarations]: Found specification of procedure el3_rx [2022-11-19 06:53:46,205 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_rx [2022-11-19 06:53:46,205 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2022-11-19 06:53:46,206 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2022-11-19 06:53:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 06:53:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-19 06:53:46,207 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-19 06:53:46,207 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-19 06:53:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-19 06:53:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_set_xcvr [2022-11-19 06:53:46,208 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_set_xcvr [2022-11-19 06:53:46,208 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_release [2022-11-19 06:53:46,209 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_release [2022-11-19 06:53:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2022-11-19 06:53:46,209 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2022-11-19 06:53:46,209 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-19 06:53:46,209 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-19 06:53:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-19 06:53:46,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-19 06:53:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure el3_get_stats [2022-11-19 06:53:46,210 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_get_stats [2022-11-19 06:53:46,210 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-19 06:53:46,211 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-19 06:53:46,211 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_detach [2022-11-19 06:53:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_detach [2022-11-19 06:53:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_wait_for_completion [2022-11-19 06:53:46,212 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_wait_for_completion [2022-11-19 06:53:46,212 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:53:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 06:53:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2022-11-19 06:53:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2022-11-19 06:53:46,213 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-19 06:53:46,213 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-19 06:53:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-19 06:53:46,214 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-19 06:53:46,214 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-11-19 06:53:46,215 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-11-19 06:53:46,215 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-19 06:53:46,215 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-19 06:53:46,216 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-19 06:53:46,216 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-19 06:53:46,217 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-19 06:53:46,217 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-19 06:53:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-19 06:53:46,218 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-19 06:53:46,218 INFO L130 BoogieDeclarations]: Found specification of procedure pop_tx_status [2022-11-19 06:53:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure pop_tx_status [2022-11-19 06:53:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:53:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2022-11-19 06:53:46,219 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2022-11-19 06:53:46,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:53:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:53:46,220 INFO L130 BoogieDeclarations]: Found specification of procedure el3_tx_timeout [2022-11-19 06:53:46,220 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_tx_timeout [2022-11-19 06:53:46,823 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:53:46,826 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:53:47,555 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-19 06:53:53,688 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:53:54,367 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:53:54,367 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-19 06:53:54,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:53:54 BoogieIcfgContainer [2022-11-19 06:53:54,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:53:54,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:53:54,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:53:54,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:53:54,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:53:43" (1/3) ... [2022-11-19 06:53:54,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242530e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:53:54, skipping insertion in model container [2022-11-19 06:53:54,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:53:45" (2/3) ... [2022-11-19 06:53:54,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242530e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:53:54, skipping insertion in model container [2022-11-19 06:53:54,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:53:54" (3/3) ... [2022-11-19 06:53:54,388 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--ethernet--3com--3c589_cs.ko-entry_point.cil.out.i [2022-11-19 06:53:54,409 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:53:54,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:53:54,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:53:54,534 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@13a7629d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:53:54,534 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:53:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 676 states, 393 states have (on average 1.3944020356234097) internal successors, (548), 431 states have internal predecessors, (548), 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) [2022-11-19 06:53:54,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-19 06:53:54,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:53:54,574 INFO L195 NwaCegarLoop]: 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] [2022-11-19 06:53:54,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:53:54,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:53:54,580 INFO L85 PathProgramCache]: Analyzing trace with hash 2080705277, now seen corresponding path program 1 times [2022-11-19 06:53:54,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:53:54,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851207009] [2022-11-19 06:53:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:53:54,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:53:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:53:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-19 06:53:56,059 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:53:56,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851207009] [2022-11-19 06:53:56,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851207009] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:53:56,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:53:56,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:53:56,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611002326] [2022-11-19 06:53:56,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:53:56,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:53:56,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:53:56,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:53:56,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:53:56,116 INFO L87 Difference]: Start difference. First operand has 676 states, 393 states have (on average 1.3944020356234097) internal successors, (548), 431 states have internal predecessors, (548), 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 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) [2022-11-19 06:53:58,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:00,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:02,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:02,917 INFO L93 Difference]: Finished difference Result 2575 states and 3893 transitions. [2022-11-19 06:54:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:54:02,924 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 [2022-11-19 06:54:02,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:02,958 INFO L225 Difference]: With dead ends: 2575 [2022-11-19 06:54:02,958 INFO L226 Difference]: Without dead ends: 1875 [2022-11-19 06:54:02,969 INFO L412 NwaCegarLoop]: 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 [2022-11-19 06:54:02,973 INFO L413 NwaCegarLoop]: 1509 mSDtfsCounter, 1841 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1841 SdHoareTripleChecker+Valid, 3516 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:02,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1841 Valid, 3516 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 832 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 06:54:03,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-11-19 06:54:03,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1861. [2022-11-19 06:54:03,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1861 states, 1086 states have (on average 1.3664825046040516) internal successors, (1484), 1172 states have internal predecessors, (1484), 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) [2022-11-19 06:54:03,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1861 states to 1861 states and 2785 transitions. [2022-11-19 06:54:03,245 INFO L78 Accepts]: Start accepts. Automaton has 1861 states and 2785 transitions. Word has length 147 [2022-11-19 06:54:03,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:03,246 INFO L495 AbstractCegarLoop]: Abstraction has 1861 states and 2785 transitions. [2022-11-19 06:54:03,246 INFO L496 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) [2022-11-19 06:54:03,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1861 states and 2785 transitions. [2022-11-19 06:54:03,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-19 06:54:03,259 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:03,260 INFO L195 NwaCegarLoop]: 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] [2022-11-19 06:54:03,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:54:03,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:03,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:03,261 INFO L85 PathProgramCache]: Analyzing trace with hash -133495553, now seen corresponding path program 1 times [2022-11-19 06:54:03,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:03,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133199811] [2022-11-19 06:54:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:03,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:04,009 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-19 06:54:04,010 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:04,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133199811] [2022-11-19 06:54:04,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133199811] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:04,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:04,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:54:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237799760] [2022-11-19 06:54:04,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:04,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:54:04,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:54:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:54:04,021 INFO L87 Difference]: Start difference. First operand 1861 states and 2785 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) [2022-11-19 06:54:06,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:08,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:11,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:11,745 INFO L93 Difference]: Finished difference Result 7314 states and 10942 transitions. [2022-11-19 06:54:11,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:54:11,747 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 [2022-11-19 06:54:11,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:11,795 INFO L225 Difference]: With dead ends: 7314 [2022-11-19 06:54:11,796 INFO L226 Difference]: Without dead ends: 5465 [2022-11-19 06:54:11,807 INFO L412 NwaCegarLoop]: 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 [2022-11-19 06:54:11,809 INFO L413 NwaCegarLoop]: 1628 mSDtfsCounter, 2152 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 369 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 2906 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:11,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2152 Valid, 2906 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 775 Invalid, 2 Unknown, 0 Unchecked, 7.3s Time] [2022-11-19 06:54:11,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2022-11-19 06:54:12,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 5451. [2022-11-19 06:54:12,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5451 states, 3180 states have (on average 1.3641509433962264) internal successors, (4338), 3430 states have internal predecessors, (4338), 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) [2022-11-19 06:54:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5451 states to 5451 states and 8151 transitions. [2022-11-19 06:54:12,291 INFO L78 Accepts]: Start accepts. Automaton has 5451 states and 8151 transitions. Word has length 148 [2022-11-19 06:54:12,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:12,293 INFO L495 AbstractCegarLoop]: Abstraction has 5451 states and 8151 transitions. [2022-11-19 06:54:12,293 INFO L496 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) [2022-11-19 06:54:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5451 states and 8151 transitions. [2022-11-19 06:54:12,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-19 06:54:12,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:12,310 INFO L195 NwaCegarLoop]: 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] [2022-11-19 06:54:12,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:54:12,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:12,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:12,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1231549835, now seen corresponding path program 1 times [2022-11-19 06:54:12,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:12,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476116838] [2022-11-19 06:54:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:12,920 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-19 06:54:12,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476116838] [2022-11-19 06:54:12,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476116838] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:12,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:12,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:54:12,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432457438] [2022-11-19 06:54:12,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:12,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:54:12,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:54:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:54:12,935 INFO L87 Difference]: Start difference. First operand 5451 states and 8151 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) [2022-11-19 06:54:14,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:17,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:20,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:20,799 INFO L93 Difference]: Finished difference Result 21662 states and 32382 transitions. [2022-11-19 06:54:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:54:20,803 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 [2022-11-19 06:54:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:20,915 INFO L225 Difference]: With dead ends: 21662 [2022-11-19 06:54:20,916 INFO L226 Difference]: Without dead ends: 16223 [2022-11-19 06:54:20,948 INFO L412 NwaCegarLoop]: 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 [2022-11-19 06:54:20,953 INFO L413 NwaCegarLoop]: 1632 mSDtfsCounter, 1795 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1795 SdHoareTripleChecker+Valid, 3795 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:20,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1795 Valid, 3795 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 879 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2022-11-19 06:54:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16223 states. [2022-11-19 06:54:22,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16223 to 16209. [2022-11-19 06:54:22,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16209 states, 9462 states have (on average 1.361868526738533) internal successors, (12886), 10192 states have internal predecessors, (12886), 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) [2022-11-19 06:54:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16209 states to 16209 states and 24211 transitions. [2022-11-19 06:54:22,489 INFO L78 Accepts]: Start accepts. Automaton has 16209 states and 24211 transitions. Word has length 149 [2022-11-19 06:54:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:22,492 INFO L495 AbstractCegarLoop]: Abstraction has 16209 states and 24211 transitions. [2022-11-19 06:54:22,493 INFO L496 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) [2022-11-19 06:54:22,493 INFO L276 IsEmpty]: Start isEmpty. Operand 16209 states and 24211 transitions. [2022-11-19 06:54:22,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-19 06:54:22,514 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:22,514 INFO L195 NwaCegarLoop]: 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] [2022-11-19 06:54:22,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:54:22,515 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:22,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:22,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2088799497, now seen corresponding path program 1 times [2022-11-19 06:54:22,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:22,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728547528] [2022-11-19 06:54:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:22,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-19 06:54:23,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:23,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728547528] [2022-11-19 06:54:23,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728547528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:23,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:23,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:54:23,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299133212] [2022-11-19 06:54:23,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:23,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:54:23,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:54:23,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:54:23,278 INFO L87 Difference]: Start difference. First operand 16209 states and 24211 transitions. 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) [2022-11-19 06:54:25,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:27,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:32,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:32,498 INFO L93 Difference]: Finished difference Result 62066 states and 92518 transitions. [2022-11-19 06:54:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:54:32,499 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 [2022-11-19 06:54:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:32,860 INFO L225 Difference]: With dead ends: 62066 [2022-11-19 06:54:32,860 INFO L226 Difference]: Without dead ends: 45869 [2022-11-19 06:54:32,948 INFO L412 NwaCegarLoop]: 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 [2022-11-19 06:54:32,953 INFO L413 NwaCegarLoop]: 1654 mSDtfsCounter, 1794 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 3817 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:32,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 3817 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 887 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-19 06:54:33,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45869 states. [2022-11-19 06:54:37,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45869 to 45801. [2022-11-19 06:54:37,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45801 states, 26798 states have (on average 1.3582356892305396) internal successors, (36398), 28692 states have internal predecessors, (36398), 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) [2022-11-19 06:54:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45801 states to 45801 states and 68139 transitions. [2022-11-19 06:54:37,426 INFO L78 Accepts]: Start accepts. Automaton has 45801 states and 68139 transitions. Word has length 150 [2022-11-19 06:54:37,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:37,427 INFO L495 AbstractCegarLoop]: Abstraction has 45801 states and 68139 transitions. [2022-11-19 06:54:37,427 INFO L496 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) [2022-11-19 06:54:37,428 INFO L276 IsEmpty]: Start isEmpty. Operand 45801 states and 68139 transitions. [2022-11-19 06:54:37,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-19 06:54:37,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:37,482 INFO L195 NwaCegarLoop]: 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] [2022-11-19 06:54:37,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:54:37,483 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:37,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1226617914, now seen corresponding path program 1 times [2022-11-19 06:54:37,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:37,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994704499] [2022-11-19 06:54:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-19 06:54:38,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:38,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994704499] [2022-11-19 06:54:38,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994704499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:38,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:38,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:54:38,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622726378] [2022-11-19 06:54:38,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:38,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:38,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:38,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:38,025 INFO L87 Difference]: Start difference. First operand 45801 states and 68139 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) [2022-11-19 06:54:40,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:41,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:43,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:54:48,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:54:48,110 INFO L93 Difference]: Finished difference Result 133852 states and 199454 transitions. [2022-11-19 06:54:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:54:48,111 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 [2022-11-19 06:54:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:54:48,794 INFO L225 Difference]: With dead ends: 133852 [2022-11-19 06:54:48,794 INFO L226 Difference]: Without dead ends: 88063 [2022-11-19 06:54:48,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:48,996 INFO L413 NwaCegarLoop]: 1234 mSDtfsCounter, 839 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:54:48,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [839 Valid, 2110 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2022-11-19 06:54:49,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88063 states. [2022-11-19 06:54:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88063 to 88060. [2022-11-19 06:54:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88060 states, 51290 states have (on average 1.3566972119321505) internal successors, (69585), 54998 states have internal predecessors, (69585), 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) [2022-11-19 06:54:55,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88060 states to 88060 states and 131250 transitions. [2022-11-19 06:54:55,467 INFO L78 Accepts]: Start accepts. Automaton has 88060 states and 131250 transitions. Word has length 183 [2022-11-19 06:54:55,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:54:55,467 INFO L495 AbstractCegarLoop]: Abstraction has 88060 states and 131250 transitions. [2022-11-19 06:54:55,468 INFO L496 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) [2022-11-19 06:54:55,468 INFO L276 IsEmpty]: Start isEmpty. Operand 88060 states and 131250 transitions. [2022-11-19 06:54:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-19 06:54:55,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:54:55,584 INFO L195 NwaCegarLoop]: 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] [2022-11-19 06:54:55,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:54:55,584 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:54:55,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:54:55,585 INFO L85 PathProgramCache]: Analyzing trace with hash 70467267, now seen corresponding path program 1 times [2022-11-19 06:54:55,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:54:55,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932968981] [2022-11-19 06:54:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:54:55,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:54:55,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:54:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-19 06:54:56,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:54:56,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932968981] [2022-11-19 06:54:56,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932968981] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:54:56,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:54:56,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:54:56,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146697723] [2022-11-19 06:54:56,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:54:56,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:54:56,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:54:56,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:54:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:54:56,842 INFO L87 Difference]: Start difference. First operand 88060 states and 131250 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) [2022-11-19 06:54:58,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:55:01,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:55:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:05,324 INFO L93 Difference]: Finished difference Result 112683 states and 169147 transitions. [2022-11-19 06:55:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:05,325 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 [2022-11-19 06:55:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:05,811 INFO L225 Difference]: With dead ends: 112683 [2022-11-19 06:55:05,811 INFO L226 Difference]: Without dead ends: 94520 [2022-11-19 06:55:05,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:05,919 INFO L413 NwaCegarLoop]: 1225 mSDtfsCounter, 271 mSDsluCounter, 945 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:05,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 2170 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 06:55:06,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94520 states. [2022-11-19 06:55:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94520 to 88062. [2022-11-19 06:55:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88062 states, 51292 states have (on average 1.3566833034391328) internal successors, (69587), 55000 states have internal predecessors, (69587), 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) [2022-11-19 06:55:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88062 states to 88062 states and 131252 transitions. [2022-11-19 06:55:11,500 INFO L78 Accepts]: Start accepts. Automaton has 88062 states and 131252 transitions. Word has length 205 [2022-11-19 06:55:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:55:11,501 INFO L495 AbstractCegarLoop]: Abstraction has 88062 states and 131252 transitions. [2022-11-19 06:55:11,501 INFO L496 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) [2022-11-19 06:55:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 88062 states and 131252 transitions. [2022-11-19 06:55:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-19 06:55:11,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:55:11,626 INFO L195 NwaCegarLoop]: 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] [2022-11-19 06:55:11,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:55:11,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:55:11,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:55:11,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2017328729, now seen corresponding path program 1 times [2022-11-19 06:55:11,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:55:11,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978560710] [2022-11-19 06:55:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:55:11,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:55:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:55:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-19 06:55:12,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:55:12,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978560710] [2022-11-19 06:55:12,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978560710] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:55:12,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:55:12,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:55:12,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089556587] [2022-11-19 06:55:12,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:55:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:55:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:55:12,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:55:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:12,210 INFO L87 Difference]: Start difference. First operand 88062 states and 131252 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) [2022-11-19 06:55:14,251 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:55:16,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-19 06:55:20,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:55:20,788 INFO L93 Difference]: Finished difference Result 112668 states and 169119 transitions. [2022-11-19 06:55:20,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:55:20,789 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 [2022-11-19 06:55:20,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:55:21,407 INFO L225 Difference]: With dead ends: 112668 [2022-11-19 06:55:21,407 INFO L226 Difference]: Without dead ends: 94503 [2022-11-19 06:55:21,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:55:21,537 INFO L413 NwaCegarLoop]: 1220 mSDtfsCounter, 254 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2154 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:55:21,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 2154 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 4.8s Time] [2022-11-19 06:55:21,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94503 states.