./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 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/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_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI --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-5e519f3 [2022-11-03 02:26:47,946 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:26:47,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:26:47,991 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:26:47,992 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:26:47,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:26:47,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:26:48,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:26:48,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:26:48,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:26:48,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:26:48,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:26:48,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:26:48,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:26:48,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:26:48,008 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:26:48,009 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:26:48,010 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:26:48,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:26:48,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:26:48,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:26:48,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:26:48,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:26:48,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:26:48,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:26:48,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:26:48,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:26:48,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:26:48,037 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:26:48,038 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:26:48,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:26:48,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:26:48,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:26:48,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:26:48,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:26:48,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:26:48,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:26:48,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:26:48,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:26:48,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:26:48,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:26:48,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-64bit-Taipan_Default.epf [2022-11-03 02:26:48,087 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:26:48,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:26:48,091 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:26:48,091 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:26:48,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:26:48,093 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:26:48,093 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:26:48,093 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:26:48,093 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:26:48,093 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:26:48,093 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:26:48,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:26:48,094 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:26:48,094 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:26:48,094 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:26:48,095 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:26:48,095 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:26:48,096 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:26:48,096 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:26:48,097 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:26:48,097 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:26:48,097 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:26:48,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:26:48,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:26:48,098 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:26:48,098 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:26:48,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:26:48,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:26:48,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:26:48,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:26:48,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:26:48,099 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:26:48,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:26:48,100 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:26:48,100 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:26:48,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:26:48,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:26:48,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:26:48,103 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_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 983ce5e5a67d7f1a953a7dc1806bc74e6e7b7100ad78daf1e74f2f1bd8e39c48 [2022-11-03 02:26:48,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:26:48,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:26:48,431 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:26:48,432 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:26:48,433 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:26:48,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/../../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 [2022-11-03 02:26:48,505 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/data/e1209b5d0/8f5d48af4dd3495b9acd0566ac33aef0/FLAGb062af435 [2022-11-03 02:26:49,358 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:26:49,359 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/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 [2022-11-03 02:26:49,402 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/data/e1209b5d0/8f5d48af4dd3495b9acd0566ac33aef0/FLAGb062af435 [2022-11-03 02:26:49,839 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/data/e1209b5d0/8f5d48af4dd3495b9acd0566ac33aef0 [2022-11-03 02:26:49,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:26:49,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:26:49,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:26:49,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:26:49,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:26:49,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:26:49" (1/1) ... [2022-11-03 02:26:49,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e598955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:49, skipping insertion in model container [2022-11-03 02:26:49,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:26:49" (1/1) ... [2022-11-03 02:26:49,859 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:26:49,958 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:26:51,325 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/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] [2022-11-03 02:26:51,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:51,393 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:26:51,741 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/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] [2022-11-03 02:26:51,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:51,932 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:26:51,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51 WrapperNode [2022-11-03 02:26:51,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:26:51,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:26:51,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:26:51,934 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:26:51,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,119 INFO L138 Inliner]: procedures = 176, calls = 1181, calls flagged for inlining = 84, calls inlined = 81, statements flattened = 2539 [2022-11-03 02:26:52,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:26:52,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:26:52,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:26:52,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:26:52,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,150 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,242 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,269 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,280 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:26:52,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:26:52,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:26:52,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:26:52,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (1/1) ... [2022-11-03 02:26:52,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:26:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:52,336 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:26:52,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0280e897-f553-4643-8569-3a14678d3536/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:26:52,385 INFO L130 BoogieDeclarations]: Found specification of procedure el3_config [2022-11-03 02:26:52,385 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_config [2022-11-03 02:26:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2022-11-03 02:26:52,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2022-11-03 02:26:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:26:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-11-03 02:26:52,386 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-11-03 02:26:52,386 INFO L130 BoogieDeclarations]: Found specification of procedure set_rx_mode [2022-11-03 02:26:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure set_rx_mode [2022-11-03 02:26:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure netif_device_present [2022-11-03 02:26:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_device_present [2022-11-03 02:26:52,387 INFO L130 BoogieDeclarations]: Found specification of procedure netif_wake_queue [2022-11-03 02:26:52,387 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_wake_queue [2022-11-03 02:26:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2022-11-03 02:26:52,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2022-11-03 02:26:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-03 02:26:52,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-03 02:26:52,388 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2022-11-03 02:26:52,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2022-11-03 02:26:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2022-11-03 02:26:52,389 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2022-11-03 02:26:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2022-11-03 02:26:52,389 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2022-11-03 02:26:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:26:52,389 INFO L130 BoogieDeclarations]: Found specification of procedure arch_local_irq_restore [2022-11-03 02:26:52,390 INFO L138 BoogieDeclarations]: Found implementation of procedure arch_local_irq_restore [2022-11-03 02:26:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-11-03 02:26:52,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-11-03 02:26:52,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-11-03 02:26:52,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-11-03 02:26:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2022-11-03 02:26:52,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2022-11-03 02:26:52,391 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-03 02:26:52,391 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-03 02:26:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure netif_stop_queue [2022-11-03 02:26:52,392 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_stop_queue [2022-11-03 02:26:52,392 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:26:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_reset [2022-11-03 02:26:52,393 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_reset [2022-11-03 02:26:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:26:52,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2022-11-03 02:26:52,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2022-11-03 02:26:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure pcmcia_dev_present [2022-11-03 02:26:52,394 INFO L138 BoogieDeclarations]: Found implementation of procedure pcmcia_dev_present [2022-11-03 02:26:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:26:52,394 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:26:52,395 INFO L130 BoogieDeclarations]: Found specification of procedure trace_hardirqs_off [2022-11-03 02:26:52,395 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_hardirqs_off [2022-11-03 02:26:52,396 INFO L130 BoogieDeclarations]: Found specification of procedure el3_rx [2022-11-03 02:26:52,397 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_rx [2022-11-03 02:26:52,397 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2022-11-03 02:26:52,397 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2022-11-03 02:26:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:26:52,398 INFO L130 BoogieDeclarations]: Found specification of procedure add_timer [2022-11-03 02:26:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure add_timer [2022-11-03 02:26:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-11-03 02:26:52,399 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-11-03 02:26:52,399 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_set_xcvr [2022-11-03 02:26:52,400 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_set_xcvr [2022-11-03 02:26:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_release [2022-11-03 02:26:52,400 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_release [2022-11-03 02:26:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure set_multicast_list [2022-11-03 02:26:52,400 INFO L138 BoogieDeclarations]: Found implementation of procedure set_multicast_list [2022-11-03 02:26:52,400 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2022-11-03 02:26:52,400 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2022-11-03 02:26:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2022-11-03 02:26:52,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2022-11-03 02:26:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure el3_get_stats [2022-11-03 02:26:52,401 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_get_stats [2022-11-03 02:26:52,401 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-11-03 02:26:52,402 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-11-03 02:26:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_detach [2022-11-03 02:26:52,402 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_detach [2022-11-03 02:26:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure tc589_wait_for_completion [2022-11-03 02:26:52,402 INFO L138 BoogieDeclarations]: Found implementation of procedure tc589_wait_for_completion [2022-11-03 02:26:52,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:26:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:26:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure update_stats [2022-11-03 02:26:52,403 INFO L138 BoogieDeclarations]: Found implementation of procedure update_stats [2022-11-03 02:26:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2022-11-03 02:26:52,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2022-11-03 02:26:52,403 INFO L130 BoogieDeclarations]: Found specification of procedure inb [2022-11-03 02:26:52,404 INFO L138 BoogieDeclarations]: Found implementation of procedure inb [2022-11-03 02:26:52,404 INFO L130 BoogieDeclarations]: Found specification of procedure outw [2022-11-03 02:26:52,405 INFO L138 BoogieDeclarations]: Found implementation of procedure outw [2022-11-03 02:26:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure eth_change_mtu [2022-11-03 02:26:52,405 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_change_mtu [2022-11-03 02:26:52,405 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2022-11-03 02:26:52,406 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2022-11-03 02:26:52,406 INFO L130 BoogieDeclarations]: Found specification of procedure outb [2022-11-03 02:26:52,406 INFO L138 BoogieDeclarations]: Found implementation of procedure outb [2022-11-03 02:26:52,406 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2022-11-03 02:26:52,407 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2022-11-03 02:26:52,407 INFO L130 BoogieDeclarations]: Found specification of procedure pop_tx_status [2022-11-03 02:26:52,408 INFO L138 BoogieDeclarations]: Found implementation of procedure pop_tx_status [2022-11-03 02:26:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:26:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure inw [2022-11-03 02:26:52,408 INFO L138 BoogieDeclarations]: Found implementation of procedure inw [2022-11-03 02:26:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:26:52,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:26:52,408 INFO L130 BoogieDeclarations]: Found specification of procedure el3_tx_timeout [2022-11-03 02:26:52,409 INFO L138 BoogieDeclarations]: Found implementation of procedure el3_tx_timeout [2022-11-03 02:26:53,049 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:26:53,054 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:26:53,695 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2022-11-03 02:26:59,919 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:27:00,574 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:27:00,574 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 02:27:00,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:00 BoogieIcfgContainer [2022-11-03 02:27:00,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:27:00,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:27:00,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:27:00,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:27:00,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:26:49" (1/3) ... [2022-11-03 02:27:00,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df42b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:00, skipping insertion in model container [2022-11-03 02:27:00,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:51" (2/3) ... [2022-11-03 02:27:00,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4df42b68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:27:00, skipping insertion in model container [2022-11-03 02:27:00,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:27:00" (3/3) ... [2022-11-03 02:27:00,595 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 [2022-11-03 02:27:00,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:27:00,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:27:00,711 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:27:00,717 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;@6c86e11b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:27:00,718 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:27:00,725 INFO L276 IsEmpty]: Start isEmpty. Operand has 680 states, 397 states have (on average 1.3904282115869018) internal successors, (552), 435 states have internal predecessors, (552), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) [2022-11-03 02:27:00,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-11-03 02:27:00,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:00,759 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] [2022-11-03 02:27:00,759 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:00,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1621563550, now seen corresponding path program 1 times [2022-11-03 02:27:00,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:00,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809677083] [2022-11-03 02:27:00,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:00,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 02:27:02,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:02,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809677083] [2022-11-03 02:27:02,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809677083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:02,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:02,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:02,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190917629] [2022-11-03 02:27:02,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:02,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:02,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:02,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:02,194 INFO L87 Difference]: Start difference. First operand has 680 states, 397 states have (on average 1.3904282115869018) internal successors, (552), 435 states have internal predecessors, (552), 237 states have call successors, (237), 45 states have call predecessors, (237), 44 states have return successors, (231), 222 states have call predecessors, (231), 231 states have call successors, (231) Second operand has 4 states, 4 states have (on average 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) [2022-11-03 02:27:04,254 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 [] [2022-11-03 02:27:06,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:09,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-03 02:27:12,280 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 [] [2022-11-03 02:27:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:13,453 INFO L93 Difference]: Finished difference Result 2677 states and 4041 transitions. [2022-11-03 02:27:13,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:13,457 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 [2022-11-03 02:27:13,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:13,488 INFO L225 Difference]: With dead ends: 2677 [2022-11-03 02:27:13,488 INFO L226 Difference]: Without dead ends: 1973 [2022-11-03 02:27:13,499 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 [2022-11-03 02:27:13,502 INFO L413 NwaCegarLoop]: 1370 mSDtfsCounter, 2514 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 460 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2514 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:13,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2514 Valid, 2720 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 770 Invalid, 3 Unknown, 0 Unchecked, 10.9s Time] [2022-11-03 02:27:13,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1973 states. [2022-11-03 02:27:13,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1973 to 1961. [2022-11-03 02:27:13,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1158 states have (on average 1.3661485319516407) internal successors, (1582), 1242 states have internal predecessors, (1582), 675 states have call successors, (675), 128 states have call predecessors, (675), 127 states have return successors, (674), 649 states have call predecessors, (674), 674 states have call successors, (674) [2022-11-03 02:27:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 2931 transitions. [2022-11-03 02:27:13,773 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 2931 transitions. Word has length 148 [2022-11-03 02:27:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:13,774 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 2931 transitions. [2022-11-03 02:27:13,774 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) [2022-11-03 02:27:13,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 2931 transitions. [2022-11-03 02:27:13,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-11-03 02:27:13,783 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:13,783 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] [2022-11-03 02:27:13,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:27:13,784 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:13,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:13,784 INFO L85 PathProgramCache]: Analyzing trace with hash -768408791, now seen corresponding path program 1 times [2022-11-03 02:27:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:13,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427514780] [2022-11-03 02:27:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 02:27:14,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:14,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427514780] [2022-11-03 02:27:14,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427514780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:14,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:14,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:14,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071079497] [2022-11-03 02:27:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:14,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:14,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:14,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:14,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:14,509 INFO L87 Difference]: Start difference. First operand 1961 states and 2931 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2022-11-03 02:27:16,548 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 [] [2022-11-03 02:27:18,749 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 [] [2022-11-03 02:27:21,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:21,750 INFO L93 Difference]: Finished difference Result 7542 states and 11262 transitions. [2022-11-03 02:27:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:21,751 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 [2022-11-03 02:27:21,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:21,789 INFO L225 Difference]: With dead ends: 7542 [2022-11-03 02:27:21,790 INFO L226 Difference]: Without dead ends: 5593 [2022-11-03 02:27:21,803 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 [2022-11-03 02:27:21,804 INFO L413 NwaCegarLoop]: 1385 mSDtfsCounter, 2260 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 420 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2260 SdHoareTripleChecker+Valid, 2672 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:21,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2260 Valid, 2672 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 729 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2022-11-03 02:27:21,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2022-11-03 02:27:22,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 5575. [2022-11-03 02:27:22,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5575 states, 3276 states have (on average 1.3614163614163615) internal successors, (4460), 3524 states have internal predecessors, (4460), 1931 states have call successors, (1931), 368 states have call predecessors, (1931), 367 states have return successors, (1930), 1855 states have call predecessors, (1930), 1930 states have call successors, (1930) [2022-11-03 02:27:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5575 states to 5575 states and 8321 transitions. [2022-11-03 02:27:22,356 INFO L78 Accepts]: Start accepts. Automaton has 5575 states and 8321 transitions. Word has length 147 [2022-11-03 02:27:22,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:22,358 INFO L495 AbstractCegarLoop]: Abstraction has 5575 states and 8321 transitions. [2022-11-03 02:27:22,358 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) [2022-11-03 02:27:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5575 states and 8321 transitions. [2022-11-03 02:27:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-03 02:27:22,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:22,370 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] [2022-11-03 02:27:22,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:27:22,370 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:22,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:22,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1455809590, now seen corresponding path program 1 times [2022-11-03 02:27:22,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:22,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503673369] [2022-11-03 02:27:22,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:22,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 02:27:22,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:22,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503673369] [2022-11-03 02:27:22,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503673369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:22,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:22,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:22,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913860743] [2022-11-03 02:27:22,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:22,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:22,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:22,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:22,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:22,995 INFO L87 Difference]: Start difference. First operand 5575 states and 8321 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) [2022-11-03 02:27:25,033 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 [] [2022-11-03 02:27:27,127 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 [] [2022-11-03 02:27:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:30,227 INFO L93 Difference]: Finished difference Result 21986 states and 32798 transitions. [2022-11-03 02:27:30,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:30,229 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 [2022-11-03 02:27:30,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:30,335 INFO L225 Difference]: With dead ends: 21986 [2022-11-03 02:27:30,335 INFO L226 Difference]: Without dead ends: 16423 [2022-11-03 02:27:30,364 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 [2022-11-03 02:27:30,367 INFO L413 NwaCegarLoop]: 1415 mSDtfsCounter, 1802 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 3591 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:30,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1802 Valid, 3591 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 834 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-03 02:27:30,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16423 states. [2022-11-03 02:27:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16423 to 16387. [2022-11-03 02:27:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16387 states, 9612 states have (on average 1.3570536828963795) internal successors, (13044), 10340 states have internal predecessors, (13044), 5687 states have call successors, (5687), 1088 states have call predecessors, (5687), 1087 states have return successors, (5686), 5473 states have call predecessors, (5686), 5686 states have call successors, (5686) [2022-11-03 02:27:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16387 states to 16387 states and 24417 transitions. [2022-11-03 02:27:31,830 INFO L78 Accepts]: Start accepts. Automaton has 16387 states and 24417 transitions. Word has length 150 [2022-11-03 02:27:31,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:31,832 INFO L495 AbstractCegarLoop]: Abstraction has 16387 states and 24417 transitions. [2022-11-03 02:27:31,833 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) [2022-11-03 02:27:31,833 INFO L276 IsEmpty]: Start isEmpty. Operand 16387 states and 24417 transitions. [2022-11-03 02:27:31,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-11-03 02:27:31,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:31,845 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] [2022-11-03 02:27:31,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:27:31,846 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:31,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:31,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1518956801, now seen corresponding path program 1 times [2022-11-03 02:27:31,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:31,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229942331] [2022-11-03 02:27:31,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:31,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2022-11-03 02:27:32,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:32,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229942331] [2022-11-03 02:27:32,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229942331] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:32,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:32,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:27:32,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642638609] [2022-11-03 02:27:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:32,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:27:32,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:32,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:27:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:27:32,460 INFO L87 Difference]: Start difference. First operand 16387 states and 24417 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) [2022-11-03 02:27:34,497 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 [] [2022-11-03 02:27:36,579 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 [] [2022-11-03 02:27:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:40,624 INFO L93 Difference]: Finished difference Result 62606 states and 93078 transitions. [2022-11-03 02:27:40,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:27:40,624 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 [2022-11-03 02:27:40,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:40,995 INFO L225 Difference]: With dead ends: 62606 [2022-11-03 02:27:40,996 INFO L226 Difference]: Without dead ends: 46231 [2022-11-03 02:27:41,095 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 [2022-11-03 02:27:41,101 INFO L413 NwaCegarLoop]: 1660 mSDtfsCounter, 1803 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1803 SdHoareTripleChecker+Valid, 3836 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:41,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1803 Valid, 3836 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 884 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2022-11-03 02:27:41,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46231 states. [2022-11-03 02:27:44,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46231 to 46213. [2022-11-03 02:27:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46213 states, 27182 states have (on average 1.3541314104922375) internal successors, (36808), 29074 states have internal predecessors, (36808), 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) [2022-11-03 02:27:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46213 states to 46213 states and 68597 transitions. [2022-11-03 02:27:44,589 INFO L78 Accepts]: Start accepts. Automaton has 46213 states and 68597 transitions. Word has length 149 [2022-11-03 02:27:44,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:44,590 INFO L495 AbstractCegarLoop]: Abstraction has 46213 states and 68597 transitions. [2022-11-03 02:27:44,591 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) [2022-11-03 02:27:44,591 INFO L276 IsEmpty]: Start isEmpty. Operand 46213 states and 68597 transitions. [2022-11-03 02:27:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-03 02:27:44,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:44,617 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] [2022-11-03 02:27:44,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:27:44,618 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:44,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 830720821, now seen corresponding path program 1 times [2022-11-03 02:27:44,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:44,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440330788] [2022-11-03 02:27:44,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:44,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-03 02:27:45,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:45,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440330788] [2022-11-03 02:27:45,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440330788] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:45,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:45,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:27:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53271170] [2022-11-03 02:27:45,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:27:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:45,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:27:45,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:27:45,046 INFO L87 Difference]: Start difference. First operand 46213 states and 68597 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) [2022-11-03 02:27:47,082 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 [] [2022-11-03 02:27:49,242 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 [] [2022-11-03 02:27:53,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:53,486 INFO L93 Difference]: Finished difference Result 135000 states and 200694 transitions. [2022-11-03 02:27:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:27:53,487 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 [2022-11-03 02:27:53,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:54,066 INFO L225 Difference]: With dead ends: 135000 [2022-11-03 02:27:54,067 INFO L226 Difference]: Without dead ends: 88799 [2022-11-03 02:27:54,245 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 [2022-11-03 02:27:54,245 INFO L413 NwaCegarLoop]: 1240 mSDtfsCounter, 843 mSDsluCounter, 977 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2120 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:54,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 2120 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 236 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 02:27:54,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88799 states. [2022-11-03 02:27:59,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88799 to 88796. [2022-11-03 02:27:59,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88796 states, 51998 states have (on average 1.3523404746336398) internal successors, (70319), 55704 states have internal predecessors, (70319), 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) [2022-11-03 02:28:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88796 states to 88796 states and 132032 transitions. [2022-11-03 02:28:00,595 INFO L78 Accepts]: Start accepts. Automaton has 88796 states and 132032 transitions. Word has length 183 [2022-11-03 02:28:00,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:00,596 INFO L495 AbstractCegarLoop]: Abstraction has 88796 states and 132032 transitions. [2022-11-03 02:28:00,596 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) [2022-11-03 02:28:00,596 INFO L276 IsEmpty]: Start isEmpty. Operand 88796 states and 132032 transitions. [2022-11-03 02:28:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-11-03 02:28:00,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:00,667 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] [2022-11-03 02:28:00,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:28:00,668 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash 532037431, now seen corresponding path program 1 times [2022-11-03 02:28:00,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:00,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776491483] [2022-11-03 02:28:00,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:00,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-03 02:28:01,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776491483] [2022-11-03 02:28:01,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776491483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:01,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:01,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:28:01,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010288545] [2022-11-03 02:28:01,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:01,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:01,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:01,393 INFO L87 Difference]: Start difference. First operand 88796 states and 132032 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) [2022-11-03 02:28:03,433 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 [] [2022-11-03 02:28:05,560 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 [] [2022-11-03 02:28:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:09,969 INFO L93 Difference]: Finished difference Result 125853 states and 188911 transitions. [2022-11-03 02:28:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:09,970 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 [2022-11-03 02:28:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:10,557 INFO L225 Difference]: With dead ends: 125853 [2022-11-03 02:28:10,557 INFO L226 Difference]: Without dead ends: 98526 [2022-11-03 02:28:10,689 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 [2022-11-03 02:28:10,690 INFO L413 NwaCegarLoop]: 1232 mSDtfsCounter, 271 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:10,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 2182 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 02:28:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98526 states. [2022-11-03 02:28:15,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98526 to 88802. [2022-11-03 02:28:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88802 states, 52004 states have (on average 1.3522998230905314) internal successors, (70325), 55710 states have internal predecessors, (70325), 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) [2022-11-03 02:28:16,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88802 states to 88802 states and 132038 transitions. [2022-11-03 02:28:16,399 INFO L78 Accepts]: Start accepts. Automaton has 88802 states and 132038 transitions. Word has length 205 [2022-11-03 02:28:16,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:16,400 INFO L495 AbstractCegarLoop]: Abstraction has 88802 states and 132038 transitions. [2022-11-03 02:28:16,401 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) [2022-11-03 02:28:16,401 INFO L276 IsEmpty]: Start isEmpty. Operand 88802 states and 132038 transitions. [2022-11-03 02:28:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-11-03 02:28:16,473 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:16,474 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] [2022-11-03 02:28:16,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:28:16,474 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:16,475 INFO L85 PathProgramCache]: Analyzing trace with hash 24535647, now seen corresponding path program 1 times [2022-11-03 02:28:16,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:16,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280798716] [2022-11-03 02:28:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:16,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-11-03 02:28:16,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:16,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280798716] [2022-11-03 02:28:16,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280798716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:28:16,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:28:16,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:28:16,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223258928] [2022-11-03 02:28:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:28:16,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:28:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:28:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:28:16,916 INFO L87 Difference]: Start difference. First operand 88802 states and 132038 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) [2022-11-03 02:28:18,954 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 [] [2022-11-03 02:28:21,049 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 [] [2022-11-03 02:28:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:25,628 INFO L93 Difference]: Finished difference Result 125808 states and 188827 transitions. [2022-11-03 02:28:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:28:25,628 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 [2022-11-03 02:28:25,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:26,305 INFO L225 Difference]: With dead ends: 125808 [2022-11-03 02:28:26,306 INFO L226 Difference]: Without dead ends: 98475 [2022-11-03 02:28:26,426 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 [2022-11-03 02:28:26,426 INFO L413 NwaCegarLoop]: 1227 mSDtfsCounter, 254 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 2166 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:26,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 2166 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 227 Invalid, 2 Unknown, 0 Unchecked, 4.9s Time] [2022-11-03 02:28:26,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98475 states.