./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 b5237d83 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/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_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba --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-b5237d8 [2022-11-22 02:43:41,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 02:43:41,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 02:43:41,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 02:43:41,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 02:43:41,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 02:43:41,714 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 02:43:41,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 02:43:41,733 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 02:43:41,739 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 02:43:41,740 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 02:43:41,741 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 02:43:41,741 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 02:43:41,745 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 02:43:41,747 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 02:43:41,749 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 02:43:41,751 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 02:43:41,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 02:43:41,754 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 02:43:41,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 02:43:41,763 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 02:43:41,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 02:43:41,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 02:43:41,768 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 02:43:41,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 02:43:41,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 02:43:41,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 02:43:41,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 02:43:41,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 02:43:41,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 02:43:41,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 02:43:41,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 02:43:41,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 02:43:41,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 02:43:41,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 02:43:41,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 02:43:41,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 02:43:41,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 02:43:41,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 02:43:41,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 02:43:41,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 02:43:41,788 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-22 02:43:41,826 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 02:43:41,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 02:43:41,827 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 02:43:41,827 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 02:43:41,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 02:43:41,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 02:43:41,828 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 02:43:41,829 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 02:43:41,829 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 02:43:41,829 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 02:43:41,830 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 02:43:41,830 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 02:43:41,830 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 02:43:41,831 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 02:43:41,831 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 02:43:41,831 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 02:43:41,831 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 02:43:41,831 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 02:43:41,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 02:43:41,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 02:43:41,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 02:43:41,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-22 02:43:41,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 02:43:41,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-22 02:43:41,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-22 02:43:41,834 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 02:43:41,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-22 02:43:41,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 02:43:41,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 02:43:41,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:43:41,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 02:43:41,835 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 02:43:41,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 02:43:41,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-22 02:43:41,836 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 02:43:41,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 02:43:41,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-22 02:43:41,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 02:43:41,837 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_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 [2022-11-22 02:43:42,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 02:43:42,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 02:43:42,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 02:43:42,215 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 02:43:42,216 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 02:43:42,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/../../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 [2022-11-22 02:43:45,251 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 02:43:45,928 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 02:43:45,928 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/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 [2022-11-22 02:43:45,984 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/data/451a98033/330d36911c1949aebe5f80f3086231c2/FLAGb929aacf9 [2022-11-22 02:43:46,009 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/data/451a98033/330d36911c1949aebe5f80f3086231c2 [2022-11-22 02:43:46,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 02:43:46,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 02:43:46,018 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 02:43:46,018 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 02:43:46,022 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 02:43:46,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32705f34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:46, skipping insertion in model container [2022-11-22 02:43:46,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:43:46" (1/1) ... [2022-11-22 02:43:46,034 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 02:43:46,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 02:43:47,689 WARN L237 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_8e32191d-cf8b-4ddf-ad33-44e38aa58226/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] [2022-11-22 02:43:47,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:43:47,799 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 02:43:48,184 WARN L237 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_8e32191d-cf8b-4ddf-ad33-44e38aa58226/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] [2022-11-22 02:43:48,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 02:43:48,417 INFO L208 MainTranslator]: Completed translation [2022-11-22 02:43:48,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48 WrapperNode [2022-11-22 02:43:48,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 02:43:48,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 02:43:48,419 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 02:43:48,419 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 02:43:48,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,490 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,594 INFO L138 Inliner]: procedures = 176, calls = 1205, calls flagged for inlining = 84, calls inlined = 81, statements flattened = 2572 [2022-11-22 02:43:48,595 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 02:43:48,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 02:43:48,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 02:43:48,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 02:43:48,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,712 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,758 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 02:43:48,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 02:43:48,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 02:43:48,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 02:43:48,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (1/1) ... [2022-11-22 02:43:48,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 02:43:48,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:43:48,822 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 02:43:48,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e32191d-cf8b-4ddf-ad33-44e38aa58226/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 02:43:48,873 INFO L130 BoogieDeclarations]: Found specification of procedure el3_config [2022-11-22 02:43:48,873 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_config [2022-11-22 02:43:48,873 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-22 02:43:48,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-22 02:43:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-22 02:43:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-22 02:43:48,874 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-22 02:43:48,874 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2022-11-22 02:43:48,874 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2022-11-22 02:43:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-22 02:43:48,875 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-22 02:43:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-22 02:43:48,875 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-22 02:43:48,875 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-22 02:43:48,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-22 02:43:48,876 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-22 02:43:48,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-22 02:43:48,876 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-22 02:43:48,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-22 02:43:48,876 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-11-22 02:43:48,877 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-11-22 02:43:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-22 02:43:48,877 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-22 02:43:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-22 02:43:48,877 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2022-11-22 02:43:48,878 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2022-11-22 02:43:48,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-22 02:43:48,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-22 02:43:48,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-22 02:43:48,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-22 02:43:48,880 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-22 02:43:48,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-22 02:43:48,881 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-22 02:43:48,881 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-22 02:43:48,881 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-22 02:43:48,881 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-22 02:43:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 02:43:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_reset [2022-11-22 02:43:48,882 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_reset [2022-11-22 02:43:48,882 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 02:43:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-11-22 02:43:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-11-22 02:43:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_dev_present [2022-11-22 02:43:48,883 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_dev_present [2022-11-22 02:43:48,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 02:43:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-22 02:43:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2022-11-22 02:43:48,884 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2022-11-22 02:43:48,884 INFO L130 BoogieDeclarations]: Found specification of procedure el3_rx [2022-11-22 02:43:48,885 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_rx [2022-11-22 02:43:48,885 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2022-11-22 02:43:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2022-11-22 02:43:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-22 02:43:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-22 02:43:48,886 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-22 02:43:48,886 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-22 02:43:48,887 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-22 02:43:48,887 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_set_xcvr [2022-11-22 02:43:48,887 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_set_xcvr [2022-11-22 02:43:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_release [2022-11-22 02:43:48,888 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_release [2022-11-22 02:43:48,888 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2022-11-22 02:43:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2022-11-22 02:43:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-22 02:43:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-22 02:43:48,889 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-22 02:43:48,889 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-22 02:43:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure el3_get_stats [2022-11-22 02:43:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_get_stats [2022-11-22 02:43:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-22 02:43:48,890 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-22 02:43:48,890 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_detach [2022-11-22 02:43:48,891 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_detach [2022-11-22 02:43:48,891 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_wait_for_completion [2022-11-22 02:43:48,891 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_wait_for_completion [2022-11-22 02:43:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 02:43:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-22 02:43:48,892 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2022-11-22 02:43:48,893 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2022-11-22 02:43:48,893 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-22 02:43:48,893 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-22 02:43:48,894 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-22 02:43:48,894 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-22 02:43:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-11-22 02:43:48,895 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-11-22 02:43:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-22 02:43:48,895 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-22 02:43:48,895 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-22 02:43:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-22 02:43:48,896 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-22 02:43:48,896 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-22 02:43:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-22 02:43:48,897 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-22 02:43:48,897 INFO L130 BoogieDeclarations]: Found specification of procedure pop_tx_status [2022-11-22 02:43:48,898 INFO L138 BoogieDeclarations]: Found implementation of procedure pop_tx_status [2022-11-22 02:43:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-22 02:43:48,898 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2022-11-22 02:43:48,899 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2022-11-22 02:43:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 02:43:48,899 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 02:43:48,899 INFO L130 BoogieDeclarations]: Found specification of procedure el3_tx_timeout [2022-11-22 02:43:48,900 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_tx_timeout [2022-11-22 02:43:49,504 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 02:43:49,507 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 02:43:50,256 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-22 02:43:56,454 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 02:43:57,139 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 02:43:57,140 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-22 02:43:57,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:43:57 BoogieIcfgContainer [2022-11-22 02:43:57,149 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 02:43:57,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 02:43:57,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 02:43:57,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 02:43:57,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:43:46" (1/3) ... [2022-11-22 02:43:57,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18190463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:43:57, skipping insertion in model container [2022-11-22 02:43:57,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:43:48" (2/3) ... [2022-11-22 02:43:57,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18190463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:43:57, skipping insertion in model container [2022-11-22 02:43:57,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:43:57" (3/3) ... [2022-11-22 02:43:57,169 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 [2022-11-22 02:43:57,191 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 02:43:57,197 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-22 02:43:57,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 02:43:57,301 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;@381498d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 02:43:57,302 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-22 02:43:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand has 677 states, 394 states have (on average 1.3959390862944163) internal successors, (550), 432 states have internal predecessors, (550), 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) [2022-11-22 02:43:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-22 02:43:57,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:43:57,363 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] [2022-11-22 02:43:57,364 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:43:57,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:43:57,372 INFO L85 PathProgramCache]: Analyzing trace with hash 955712433, now seen corresponding path program 1 times [2022-11-22 02:43:57,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:43:57,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605816664] [2022-11-22 02:43:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:43:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:43:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:43:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 02:43:58,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:43:58,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605816664] [2022-11-22 02:43:58,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605816664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:43:58,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:43:58,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:43:58,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209733856] [2022-11-22 02:43:58,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:43:58,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:43:58,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:43:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:43:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:43:58,849 INFO L87 Difference]: Start difference. First operand has 677 states, 394 states have (on average 1.3959390862944163) internal successors, (550), 432 states have internal predecessors, (550), 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) [2022-11-22 02:44:00,906 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 [] [2022-11-22 02:44:03,057 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 [] [2022-11-22 02:44:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:05,568 INFO L93 Difference]: Finished difference Result 2579 states and 3901 transitions. [2022-11-22 02:44:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:44:05,571 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 [2022-11-22 02:44:05,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:05,611 INFO L225 Difference]: With dead ends: 2579 [2022-11-22 02:44:05,611 INFO L226 Difference]: Without dead ends: 1878 [2022-11-22 02:44:05,623 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 [2022-11-22 02:44:05,627 INFO L413 NwaCegarLoop]: 1411 mSDtfsCounter, 1845 mSDsluCounter, 2018 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1845 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:05,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1845 Valid, 3429 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 804 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-22 02:44:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-22 02:44:05,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1864. [2022-11-22 02:44:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1089 states have (on average 1.3682277318640954) internal successors, (1490), 1175 states have internal predecessors, (1490), 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) [2022-11-22 02:44:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 2791 transitions. [2022-11-22 02:44:05,929 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 2791 transitions. Word has length 147 [2022-11-22 02:44:05,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:05,931 INFO L495 AbstractCegarLoop]: Abstraction has 1864 states and 2791 transitions. [2022-11-22 02:44:05,931 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) [2022-11-22 02:44:05,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 2791 transitions. [2022-11-22 02:44:05,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-22 02:44:05,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:05,955 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] [2022-11-22 02:44:05,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-22 02:44:05,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:05,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:05,956 INFO L85 PathProgramCache]: Analyzing trace with hash -809927671, now seen corresponding path program 1 times [2022-11-22 02:44:05,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:05,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609287616] [2022-11-22 02:44:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:05,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:06,620 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 02:44:06,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:06,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609287616] [2022-11-22 02:44:06,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609287616] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:44:06,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:44:06,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:44:06,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502623504] [2022-11-22 02:44:06,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:44:06,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:44:06,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:06,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:44:06,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:44:06,633 INFO L87 Difference]: Start difference. First operand 1864 states and 2791 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) [2022-11-22 02:44:08,671 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 [] [2022-11-22 02:44:10,763 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 [] [2022-11-22 02:44:13,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:13,750 INFO L93 Difference]: Finished difference Result 7326 states and 10966 transitions. [2022-11-22 02:44:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:44:13,751 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 [2022-11-22 02:44:13,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:13,786 INFO L225 Difference]: With dead ends: 7326 [2022-11-22 02:44:13,786 INFO L226 Difference]: Without dead ends: 5474 [2022-11-22 02:44:13,796 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 [2022-11-22 02:44:13,797 INFO L413 NwaCegarLoop]: 1415 mSDtfsCounter, 1799 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1799 SdHoareTripleChecker+Valid, 3590 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:13,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1799 Valid, 3590 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 827 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-22 02:44:13,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2022-11-22 02:44:14,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 5460. [2022-11-22 02:44:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 3189 states have (on average 1.3659454374412041) internal successors, (4356), 3439 states have internal predecessors, (4356), 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) [2022-11-22 02:44:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 8169 transitions. [2022-11-22 02:44:14,292 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 8169 transitions. Word has length 149 [2022-11-22 02:44:14,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:14,293 INFO L495 AbstractCegarLoop]: Abstraction has 5460 states and 8169 transitions. [2022-11-22 02:44:14,294 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) [2022-11-22 02:44:14,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 8169 transitions. [2022-11-22 02:44:14,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-22 02:44:14,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:14,305 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] [2022-11-22 02:44:14,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-22 02:44:14,306 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:14,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:14,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1427278482, now seen corresponding path program 1 times [2022-11-22 02:44:14,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:14,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139228603] [2022-11-22 02:44:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:14,909 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 02:44:14,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:14,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139228603] [2022-11-22 02:44:14,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139228603] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:44:14,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:44:14,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:44:14,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456969886] [2022-11-22 02:44:14,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:44:14,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:44:14,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:14,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:44:14,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:44:14,921 INFO L87 Difference]: Start difference. First operand 5460 states and 8169 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) [2022-11-22 02:44:16,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:44:19,151 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 [] [2022-11-22 02:44:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:22,579 INFO L93 Difference]: Finished difference Result 21698 states and 32454 transitions. [2022-11-22 02:44:22,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:44:22,580 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 [2022-11-22 02:44:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:22,695 INFO L225 Difference]: With dead ends: 21698 [2022-11-22 02:44:22,695 INFO L226 Difference]: Without dead ends: 16250 [2022-11-22 02:44:22,727 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 [2022-11-22 02:44:22,731 INFO L413 NwaCegarLoop]: 1419 mSDtfsCounter, 2246 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 418 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2246 SdHoareTripleChecker+Valid, 2705 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 418 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:22,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2246 Valid, 2705 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [418 Valid, 725 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2022-11-22 02:44:22,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16250 states. [2022-11-22 02:44:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16250 to 16218. [2022-11-22 02:44:24,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16218 states, 9471 states have (on average 1.3624749234505331) internal successors, (12904), 10201 states have internal predecessors, (12904), 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) [2022-11-22 02:44:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16218 states to 16218 states and 24229 transitions. [2022-11-22 02:44:24,303 INFO L78 Accepts]: Start accepts. Automaton has 16218 states and 24229 transitions. Word has length 150 [2022-11-22 02:44:24,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:24,304 INFO L495 AbstractCegarLoop]: Abstraction has 16218 states and 24229 transitions. [2022-11-22 02:44:24,305 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) [2022-11-22 02:44:24,306 INFO L276 IsEmpty]: Start isEmpty. Operand 16218 states and 24229 transitions. [2022-11-22 02:44:24,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-22 02:44:24,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:24,322 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] [2022-11-22 02:44:24,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-22 02:44:24,323 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:24,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1612809862, now seen corresponding path program 1 times [2022-11-22 02:44:24,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:24,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821839348] [2022-11-22 02:44:24,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:24,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-22 02:44:24,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:24,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821839348] [2022-11-22 02:44:24,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821839348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:44:24,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:44:24,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 02:44:24,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376065652] [2022-11-22 02:44:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:44:24,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 02:44:24,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 02:44:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-22 02:44:24,828 INFO L87 Difference]: Start difference. First operand 16218 states and 24229 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) [2022-11-22 02:44:26,865 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 [] [2022-11-22 02:44:28,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:44:33,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:44:35,207 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:44:37,213 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:44:39,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:39,782 INFO L93 Difference]: Finished difference Result 62188 states and 92722 transitions. [2022-11-22 02:44:39,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 02:44:39,783 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 [2022-11-22 02:44:39,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:40,077 INFO L225 Difference]: With dead ends: 62188 [2022-11-22 02:44:40,077 INFO L226 Difference]: Without dead ends: 45982 [2022-11-22 02:44:40,163 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 [2022-11-22 02:44:40,164 INFO L413 NwaCegarLoop]: 1344 mSDtfsCounter, 2448 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 454 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2448 SdHoareTripleChecker+Valid, 2660 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 454 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:40,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2448 Valid, 2660 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [454 Valid, 752 Invalid, 4 Unknown, 0 Unchecked, 12.9s Time] [2022-11-22 02:44:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45982 states. [2022-11-22 02:44:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45982 to 45970. [2022-11-22 02:44:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45970 states, 26939 states have (on average 1.360332603288912) internal successors, (36646), 28831 states have internal predecessors, (36646), 15895 states have call successors, (15895), 3136 states have call predecessors, (15895), 3135 states have return successors, (15894), 15335 states have call predecessors, (15894), 15894 states have call successors, (15894) [2022-11-22 02:44:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45970 states to 45970 states and 68435 transitions. [2022-11-22 02:44:43,864 INFO L78 Accepts]: Start accepts. Automaton has 45970 states and 68435 transitions. Word has length 148 [2022-11-22 02:44:43,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:44:43,865 INFO L495 AbstractCegarLoop]: Abstraction has 45970 states and 68435 transitions. [2022-11-22 02:44:43,865 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) [2022-11-22 02:44:43,865 INFO L276 IsEmpty]: Start isEmpty. Operand 45970 states and 68435 transitions. [2022-11-22 02:44:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-22 02:44:43,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:44:43,898 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] [2022-11-22 02:44:43,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-22 02:44:43,898 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:44:43,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:44:43,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1745598883, now seen corresponding path program 1 times [2022-11-22 02:44:43,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:44:43,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504645078] [2022-11-22 02:44:43,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:44:43,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:44:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:44:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-22 02:44:44,954 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:44:44,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504645078] [2022-11-22 02:44:44,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504645078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:44:44,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:44:44,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:44:44,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550023773] [2022-11-22 02:44:44,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:44:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:44:44,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:44:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:44:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:44:44,958 INFO L87 Difference]: Start difference. First operand 45970 states and 68435 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) [2022-11-22 02:44:46,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:44:49,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:44:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:44:53,394 INFO L93 Difference]: Finished difference Result 134271 states and 200208 transitions. [2022-11-22 02:44:53,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:44:53,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 183 [2022-11-22 02:44:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:44:54,012 INFO L225 Difference]: With dead ends: 134271 [2022-11-22 02:44:54,012 INFO L226 Difference]: Without dead ends: 88313 [2022-11-22 02:44:54,436 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 [2022-11-22 02:44:54,437 INFO L413 NwaCegarLoop]: 1240 mSDtfsCounter, 841 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-22 02:44:54,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 2120 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-11-22 02:44:54,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88313 states. [2022-11-22 02:44:59,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88313 to 88310. [2022-11-22 02:44:59,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88310 states, 51512 states have (on average 1.3588095977636279) internal successors, (69995), 55218 states have internal predecessors, (69995), 30857 states have call successors, (30857), 5941 states have call predecessors, (30857), 5940 states have return successors, (30856), 29816 states have call predecessors, (30856), 30856 states have call successors, (30856) [2022-11-22 02:45:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88310 states to 88310 states and 131708 transitions. [2022-11-22 02:45:00,406 INFO L78 Accepts]: Start accepts. Automaton has 88310 states and 131708 transitions. Word has length 183 [2022-11-22 02:45:00,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:00,407 INFO L495 AbstractCegarLoop]: Abstraction has 88310 states and 131708 transitions. [2022-11-22 02:45:00,407 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) [2022-11-22 02:45:00,408 INFO L276 IsEmpty]: Start isEmpty. Operand 88310 states and 131708 transitions. [2022-11-22 02:45:00,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-22 02:45:00,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:00,490 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] [2022-11-22 02:45:00,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-22 02:45:00,490 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:00,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:00,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1449106372, now seen corresponding path program 1 times [2022-11-22 02:45:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:00,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175847376] [2022-11-22 02:45:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:00,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-22 02:45:01,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:45:01,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175847376] [2022-11-22 02:45:01,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175847376] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:45:01,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:45:01,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:45:01,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119953596] [2022-11-22 02:45:01,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:45:01,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:45:01,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:45:01,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:45:01,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:45:01,650 INFO L87 Difference]: Start difference. First operand 88310 states and 131708 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) [2022-11-22 02:45:03,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:45:05,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:45:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:10,065 INFO L93 Difference]: Finished difference Result 125271 states and 188587 transitions. [2022-11-22 02:45:10,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:45:10,066 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 [2022-11-22 02:45:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:10,566 INFO L225 Difference]: With dead ends: 125271 [2022-11-22 02:45:10,567 INFO L226 Difference]: Without dead ends: 98088 [2022-11-22 02:45:10,701 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 [2022-11-22 02:45:10,702 INFO L413 NwaCegarLoop]: 1234 mSDtfsCounter, 273 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:10,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 2184 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 224 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-22 02:45:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98088 states. [2022-11-22 02:45:15,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98088 to 88316. [2022-11-22 02:45:15,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88316 states, 51518 states have (on average 1.3587678093093676) internal successors, (70001), 55224 states have internal predecessors, (70001), 30857 states have call successors, (30857), 5941 states have call predecessors, (30857), 5940 states have return successors, (30856), 29816 states have call predecessors, (30856), 30856 states have call successors, (30856) [2022-11-22 02:45:16,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88316 states to 88316 states and 131714 transitions. [2022-11-22 02:45:16,064 INFO L78 Accepts]: Start accepts. Automaton has 88316 states and 131714 transitions. Word has length 205 [2022-11-22 02:45:16,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:45:16,065 INFO L495 AbstractCegarLoop]: Abstraction has 88316 states and 131714 transitions. [2022-11-22 02:45:16,065 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) [2022-11-22 02:45:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 88316 states and 131714 transitions. [2022-11-22 02:45:16,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-22 02:45:16,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:45:16,141 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] [2022-11-22 02:45:16,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-22 02:45:16,142 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-22 02:45:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:45:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash -92017606, now seen corresponding path program 1 times [2022-11-22 02:45:16,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-22 02:45:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416552215] [2022-11-22 02:45:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:45:16,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-22 02:45:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:45:16,687 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-22 02:45:16,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-22 02:45:16,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416552215] [2022-11-22 02:45:16,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416552215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:45:16,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:45:16,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:45:16,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105035855] [2022-11-22 02:45:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:45:16,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 02:45:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-22 02:45:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 02:45:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 02:45:16,694 INFO L87 Difference]: Start difference. First operand 88316 states and 131714 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) [2022-11-22 02:45:18,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:45:21,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 02:45:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:45:25,520 INFO L93 Difference]: Finished difference Result 125226 states and 188503 transitions. [2022-11-22 02:45:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 02:45:25,522 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 [2022-11-22 02:45:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:45:26,085 INFO L225 Difference]: With dead ends: 125226 [2022-11-22 02:45:26,086 INFO L226 Difference]: Without dead ends: 98037 [2022-11-22 02:45:26,201 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 [2022-11-22 02:45:26,202 INFO L413 NwaCegarLoop]: 1229 mSDtfsCounter, 256 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:45:26,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 2168 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 2 Unknown, 0 Unchecked, 5.3s Time] [2022-11-22 02:45:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98037 states.