./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--wcn36xx--wcn36xx.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--wcn36xx--wcn36xx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash eaaec3cc0f5537133af92fa7cbd54bc8d5ff0f4d0c87a0d3c9d98d3d6549f9cf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:46:12,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:46:12,986 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:46:13,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:46:13,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:46:13,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:46:13,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:46:13,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:46:13,042 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:46:13,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:46:13,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:46:13,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:46:13,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:46:13,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:46:13,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:46:13,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:46:13,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:46:13,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:46:13,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:46:13,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:46:13,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:46:13,081 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:46:13,084 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:46:13,085 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:46:13,093 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:46:13,094 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:46:13,094 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:46:13,095 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:46:13,096 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:46:13,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:46:13,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:46:13,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:46:13,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:46:13,101 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:46:13,102 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:46:13,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:46:13,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:46:13,109 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:46:13,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:46:13,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:46:13,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:46:13,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:46:13,159 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:46:13,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:46:13,160 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:46:13,160 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:46:13,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:46:13,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:46:13,165 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:46:13,165 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:46:13,165 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:46:13,165 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:46:13,166 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:46:13,167 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:46:13,167 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:46:13,167 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:46:13,167 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:46:13,168 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:46:13,168 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:46:13,168 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:46:13,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:46:13,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:46:13,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:46:13,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:46:13,170 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:46:13,170 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:46:13,170 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:46:13,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:46:13,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:46:13,171 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:46:13,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:46:13,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:46:13,171 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:46:13,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:46:13,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:46:13,172 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:46:13,172 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:46:13,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:46:13,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:46:13,173 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:46:13,173 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eaaec3cc0f5537133af92fa7cbd54bc8d5ff0f4d0c87a0d3c9d98d3d6549f9cf [2021-11-23 03:46:13,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:46:13,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:46:13,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:46:13,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:46:13,489 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:46:13,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--wcn36xx--wcn36xx.ko-entry_point.cil.out.i [2021-11-23 03:46:13,562 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/data/c513ea705/14a3fafbacd24fc799bab96c59a9afb7/FLAG180e7b913 [2021-11-23 03:46:14,761 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:46:14,762 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--wcn36xx--wcn36xx.ko-entry_point.cil.out.i [2021-11-23 03:46:14,832 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/data/c513ea705/14a3fafbacd24fc799bab96c59a9afb7/FLAG180e7b913 [2021-11-23 03:46:14,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/data/c513ea705/14a3fafbacd24fc799bab96c59a9afb7 [2021-11-23 03:46:14,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:46:14,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:46:14,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:46:14,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:46:14,996 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:46:14,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:46:14" (1/1) ... [2021-11-23 03:46:14,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@327868cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:14, skipping insertion in model container [2021-11-23 03:46:14,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:46:14" (1/1) ... [2021-11-23 03:46:15,006 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:46:15,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:46:16,585 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_f190bb8b-2241-4426-9330-693379db59dc/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--wcn36xx--wcn36xx.ko-entry_point.cil.out.i[210460,210473] [2021-11-23 03:46:18,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:46:18,922 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:46:19,109 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_f190bb8b-2241-4426-9330-693379db59dc/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--wcn36xx--wcn36xx.ko-entry_point.cil.out.i[210460,210473] [2021-11-23 03:46:19,433 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:46:19,607 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:46:19,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19 WrapperNode [2021-11-23 03:46:19,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:46:19,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:46:19,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:46:19,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:46:19,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:19,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,200 INFO L137 Inliner]: procedures = 405, calls = 4065, calls flagged for inlining = 194, calls inlined = 168, statements flattened = 8515 [2021-11-23 03:46:20,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:46:20,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:46:20,203 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:46:20,203 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:46:20,213 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,213 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,269 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,271 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,514 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:46:20,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:46:20,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:46:20,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:46:20,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (1/1) ... [2021-11-23 03:46:20,608 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:46:20,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:46:20,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:46:20,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:46:20,689 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_free_ctl_blks [2021-11-23 03:46:20,689 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_free_ctl_blks [2021-11-23 03:46:20,689 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_ch_alloc_skb [2021-11-23 03:46:20,689 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_ch_alloc_skb [2021-11-23 03:46:20,690 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_remove_interface [2021-11-23 03:46:20,690 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_remove_interface [2021-11-23 03:46:20,690 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_free_txskb [2021-11-23 03:46:20,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_free_txskb [2021-11-23 03:46:20,690 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 03:46:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 03:46:20,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:46:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:46:20,691 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_alloc [2021-11-23 03:46:20,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_alloc [2021-11-23 03:46:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure free_irq [2021-11-23 03:46:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure free_irq [2021-11-23 03:46:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure get_feat_caps [2021-11-23 03:46:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure get_feat_caps [2021-11-23 03:46:20,692 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_probe [2021-11-23 03:46:20,692 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_probe [2021-11-23 03:46:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_allocate_ctl_block [2021-11-23 03:46:20,693 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_allocate_ctl_block [2021-11-23 03:46:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure conf_is_ht40_plus [2021-11-23 03:46:20,693 INFO L138 BoogieDeclarations]: Found implementation of procedure conf_is_ht40_plus [2021-11-23 03:46:20,693 INFO L130 BoogieDeclarations]: Found specification of procedure valid_dma_direction [2021-11-23 03:46:20,694 INFO L138 BoogieDeclarations]: Found implementation of procedure valid_dma_direction [2021-11-23 03:46:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_enable_ch_int [2021-11-23 03:46:20,694 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_enable_ch_int [2021-11-23 03:46:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_sta_remove [2021-11-23 03:46:20,694 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_sta_remove [2021-11-23 03:46:20,694 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_start [2021-11-23 03:46:20,695 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_start [2021-11-23 03:46:20,695 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-23 03:46:20,695 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-23 03:46:20,695 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 03:46:20,695 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_pmc_enter_bmps_state [2021-11-23 03:46:20,696 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_pmc_enter_bmps_state [2021-11-23 03:46:20,696 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_ch_free_skbs [2021-11-23 03:46:20,696 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_ch_free_skbs [2021-11-23 03:46:20,696 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_configure_filter [2021-11-23 03:46:20,696 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_configure_filter [2021-11-23 03:46:20,696 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_convert_sta_to_v1 [2021-11-23 03:46:20,697 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_convert_sta_to_v1 [2021-11-23 03:46:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2021-11-23 03:46:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 03:46:20,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 03:46:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-23 03:46:20,698 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-23 03:46:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:46:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_stop [2021-11-23 03:46:20,698 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_stop [2021-11-23 03:46:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure iounmap [2021-11-23 03:46:20,698 INFO L138 BoogieDeclarations]: Found implementation of procedure iounmap [2021-11-23 03:46:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-23 03:46:20,699 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-23 03:46:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:46:20,779 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:46:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:46:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-23 03:46:20,779 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-23 03:46:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure get_dma_ops [2021-11-23 03:46:20,779 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dma_ops [2021-11-23 03:46:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:46:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:46:20,779 INFO L130 BoogieDeclarations]: Found specification of procedure __phys_addr [2021-11-23 03:46:20,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __phys_addr [2021-11-23 03:46:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure reg_check_1 [2021-11-23 03:46:20,780 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_check_1 [2021-11-23 03:46:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:46:20,780 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:46:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_config_sta [2021-11-23 03:46:20,780 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_config_sta [2021-11-23 03:46:20,780 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_destroy [2021-11-23 03:46:20,780 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_destroy [2021-11-23 03:46:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_is_watching [2021-11-23 03:46:20,781 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_is_watching [2021-11-23 03:46:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_set_link_st [2021-11-23 03:46:20,781 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_set_link_st [2021-11-23 03:46:20,781 INFO L130 BoogieDeclarations]: Found specification of procedure print_hex_dump [2021-11-23 03:46:20,781 INFO L138 BoogieDeclarations]: Found implementation of procedure print_hex_dump [2021-11-23 03:46:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2021-11-23 03:46:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~~u32~0~X~~u32~0~TO~int [2021-11-23 03:46:20,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~~u32~0~X~~u32~0~TO~int [2021-11-23 03:46:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:46:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure dma_map_single_attrs [2021-11-23 03:46:20,783 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_map_single_attrs [2021-11-23 03:46:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-23 03:46:20,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-23 03:46:20,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:46:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_free_hw [2021-11-23 03:46:20,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_free_hw [2021-11-23 03:46:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_config [2021-11-23 03:46:20,784 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_config [2021-11-23 03:46:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:46:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 03:46:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_set_key [2021-11-23 03:46:20,784 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_set_key [2021-11-23 03:46:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:46:20,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 03:46:20,784 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-23 03:46:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-23 03:46:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_add_interface [2021-11-23 03:46:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_add_interface [2021-11-23 03:46:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_config_bss [2021-11-23 03:46:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_config_bss [2021-11-23 03:46:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_free_mem_pools [2021-11-23 03:46:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_free_mem_pools [2021-11-23 03:46:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure platform_get_resource_byname [2021-11-23 03:46:20,785 INFO L138 BoogieDeclarations]: Found implementation of procedure platform_get_resource_byname [2021-11-23 03:46:20,785 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_stop [2021-11-23 03:46:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_stop [2021-11-23 03:46:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:46:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:46:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:46:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:46:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_tx [2021-11-23 03:46:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_tx [2021-11-23 03:46:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure buff_to_be [2021-11-23 03:46:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure buff_to_be [2021-11-23 03:46:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:46:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:46:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:46:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:46:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_set_power_params [2021-11-23 03:46:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_set_power_params [2021-11-23 03:46:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure request_irq [2021-11-23 03:46:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure request_irq [2021-11-23 03:46:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_sta_add [2021-11-23 03:46:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_sta_add [2021-11-23 03:46:20,787 INFO L130 BoogieDeclarations]: Found specification of procedure get_vif_by_addr [2021-11-23 03:46:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure get_vif_by_addr [2021-11-23 03:46:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_workqueue [2021-11-23 03:46:20,790 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_workqueue [2021-11-23 03:46:20,790 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_tx_status_irqsafe [2021-11-23 03:46:20,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_tx_status_irqsafe [2021-11-23 03:46:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:46:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:46:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_is_data_qos [2021-11-23 03:46:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_is_data_qos [2021-11-23 03:46:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:46:20,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:46:20,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:46:20,792 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:46:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_irq_1 [2021-11-23 03:46:20,792 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_irq_1 [2021-11-23 03:46:20,792 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:46:20,793 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:46:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_set_stakey [2021-11-23 03:46:20,793 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_set_stakey [2021-11-23 03:46:20,793 INFO L130 BoogieDeclarations]: Found specification of procedure get_sta_index [2021-11-23 03:46:20,793 INFO L138 BoogieDeclarations]: Found implementation of procedure get_sta_index [2021-11-23 03:46:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure write_file_dump [2021-11-23 03:46:20,794 INFO L138 BoogieDeclarations]: Found implementation of procedure write_file_dump [2021-11-23 03:46:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:46:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-23 03:46:20,794 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-23 03:46:20,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:46:20,795 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_rsp_status_check [2021-11-23 03:46:20,795 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_rsp_status_check [2021-11-23 03:46:20,795 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_delete_bss [2021-11-23 03:46:20,795 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_delete_bss [2021-11-23 03:46:20,795 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_set_remove [2021-11-23 03:46:20,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_set_remove [2021-11-23 03:46:20,795 INFO L130 BoogieDeclarations]: Found specification of procedure conf_is_ht40_minus [2021-11-23 03:46:20,796 INFO L138 BoogieDeclarations]: Found implementation of procedure conf_is_ht40_minus [2021-11-23 03:46:20,796 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_bss_info_changed [2021-11-23 03:46:20,799 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_bss_info_changed [2021-11-23 03:46:20,799 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_remove [2021-11-23 03:46:20,799 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_remove [2021-11-23 03:46:20,799 INFO L130 BoogieDeclarations]: Found specification of procedure is_zero_ether_addr [2021-11-23 03:46:20,800 INFO L138 BoogieDeclarations]: Found implementation of procedure is_zero_ether_addr [2021-11-23 03:46:20,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:46:20,800 INFO L130 BoogieDeclarations]: Found specification of procedure __mutex_init [2021-11-23 03:46:20,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __mutex_init [2021-11-23 03:46:20,800 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_fill_skb [2021-11-23 03:46:20,800 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_fill_skb [2021-11-23 03:46:20,800 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-23 03:46:20,801 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-23 03:46:20,801 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 03:46:20,801 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 03:46:20,801 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_sw_scan_complete [2021-11-23 03:46:20,801 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_sw_scan_complete [2021-11-23 03:46:20,801 INFO L130 BoogieDeclarations]: Found specification of procedure is_cap_supported [2021-11-23 03:46:20,802 INFO L138 BoogieDeclarations]: Found implementation of procedure is_cap_supported [2021-11-23 03:46:20,802 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_update_allowed_rates [2021-11-23 03:46:20,802 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_update_allowed_rates [2021-11-23 03:46:20,802 INFO L130 BoogieDeclarations]: Found specification of procedure flush_workqueue [2021-11-23 03:46:20,802 INFO L138 BoogieDeclarations]: Found implementation of procedure flush_workqueue [2021-11-23 03:46:20,802 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_is_fw_version [2021-11-23 03:46:20,802 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_is_fw_version [2021-11-23 03:46:20,803 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-23 03:46:20,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-23 03:46:20,803 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_read_register [2021-11-23 03:46:20,803 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_read_register [2021-11-23 03:46:20,803 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_pmc_exit_bmps_state [2021-11-23 03:46:20,803 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_pmc_exit_bmps_state [2021-11-23 03:46:20,803 INFO L130 BoogieDeclarations]: Found specification of procedure dma_free_attrs [2021-11-23 03:46:20,804 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_free_attrs [2021-11-23 03:46:20,804 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_sw_scan_start [2021-11-23 03:46:20,804 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_sw_scan_start [2021-11-23 03:46:20,805 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_skb_free [2021-11-23 03:46:20,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_skb_free [2021-11-23 03:46:20,805 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:46:20,805 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:46:20,806 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_file [2021-11-23 03:46:20,806 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_file [2021-11-23 03:46:20,806 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_close [2021-11-23 03:46:20,806 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_close [2021-11-23 03:46:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:46:20,808 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_irq_1 [2021-11-23 03:46:20,808 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_irq_1 [2021-11-23 03:46:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:46:20,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:46:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_resume [2021-11-23 03:46:20,809 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_resume [2021-11-23 03:46:20,809 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_set_rts_threshold [2021-11-23 03:46:20,810 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_set_rts_threshold [2021-11-23 03:46:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_set_sta_params [2021-11-23 03:46:20,811 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_set_sta_params [2021-11-23 03:46:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_ampdu_action [2021-11-23 03:46:20,811 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_ampdu_action [2021-11-23 03:46:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_init_descs [2021-11-23 03:46:20,812 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_init_descs [2021-11-23 03:46:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure ieee80211_stop_queues [2021-11-23 03:46:20,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ieee80211_stop_queues [2021-11-23 03:46:20,813 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 03:46:20,813 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 03:46:20,813 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_suspicious [2021-11-23 03:46:20,813 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_suspicious [2021-11-23 03:46:20,813 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_write_register [2021-11-23 03:46:20,813 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_write_register [2021-11-23 03:46:20,814 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_set_tx_pdu [2021-11-23 03:46:20,814 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_set_tx_pdu [2021-11-23 03:46:20,814 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_suspend [2021-11-23 03:46:20,814 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_suspend [2021-11-23 03:46:20,815 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_add_ba_session [2021-11-23 03:46:20,815 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_add_ba_session [2021-11-23 03:46:20,815 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_smd_send_and_wait [2021-11-23 03:46:20,816 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_smd_send_and_wait [2021-11-23 03:46:20,816 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_init_tx_bd [2021-11-23 03:46:20,819 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_init_tx_bd [2021-11-23 03:46:20,820 INFO L130 BoogieDeclarations]: Found specification of procedure wcn36xx_dxe_free_ctl_block [2021-11-23 03:46:20,820 INFO L138 BoogieDeclarations]: Found implementation of procedure wcn36xx_dxe_free_ctl_block [2021-11-23 03:46:20,820 INFO L130 BoogieDeclarations]: Found specification of procedure dma_alloc_attrs [2021-11-23 03:46:20,820 INFO L138 BoogieDeclarations]: Found implementation of procedure dma_alloc_attrs [2021-11-23 03:46:20,821 INFO L130 BoogieDeclarations]: Found specification of procedure simple_open [2021-11-23 03:46:20,822 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_open [2021-11-23 03:46:20,822 INFO L130 BoogieDeclarations]: Found specification of procedure write_file_bool_bmps [2021-11-23 03:46:20,822 INFO L138 BoogieDeclarations]: Found implementation of procedure write_file_bool_bmps [2021-11-23 03:46:20,827 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_unlock [2021-11-23 03:46:20,828 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_unlock [2021-11-23 03:46:20,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:46:20,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-11-23 03:46:20,828 INFO L130 BoogieDeclarations]: Found specification of procedure IEEE80211_SKB_CB [2021-11-23 03:46:20,828 INFO L138 BoogieDeclarations]: Found implementation of procedure IEEE80211_SKB_CB [2021-11-23 03:46:21,970 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:46:21,974 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:46:22,775 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:46:49,182 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:46:52,040 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:46:52,041 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-23 03:46:52,048 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:46:52 BoogieIcfgContainer [2021-11-23 03:46:52,049 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:46:52,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:46:52,051 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:46:52,055 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:46:52,056 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:46:14" (1/3) ... [2021-11-23 03:46:52,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd4a945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:46:52, skipping insertion in model container [2021-11-23 03:46:52,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:46:19" (2/3) ... [2021-11-23 03:46:52,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cd4a945 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:46:52, skipping insertion in model container [2021-11-23 03:46:52,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:46:52" (3/3) ... [2021-11-23 03:46:52,059 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--wcn36xx--wcn36xx.ko-entry_point.cil.out.i [2021-11-23 03:46:52,067 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:46:52,067 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:46:52,154 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:46:52,169 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:46:52,170 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:46:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 2077 states, 1268 states have (on average 1.2941640378548895) internal successors, (1641), 1293 states have internal predecessors, (1641), 691 states have call successors, (691), 117 states have call predecessors, (691), 116 states have return successors, (685), 685 states have call predecessors, (685), 685 states have call successors, (685) [2021-11-23 03:46:52,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 03:46:52,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:46:52,278 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:46:52,279 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:46:52,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:46:52,285 INFO L85 PathProgramCache]: Analyzing trace with hash -169999192, now seen corresponding path program 1 times [2021-11-23 03:46:52,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:46:52,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466929828] [2021-11-23 03:46:52,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:46:52,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:46:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:46:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-23 03:46:53,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:46:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466929828] [2021-11-23 03:46:53,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466929828] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:46:53,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:46:53,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:46:53,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510540353] [2021-11-23 03:46:53,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:46:53,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:46:53,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:46:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:46:53,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:46:53,276 INFO L87 Difference]: Start difference. First operand has 2077 states, 1268 states have (on average 1.2941640378548895) internal successors, (1641), 1293 states have internal predecessors, (1641), 691 states have call successors, (691), 117 states have call predecessors, (691), 116 states have return successors, (685), 685 states have call predecessors, (685), 685 states have call successors, (685) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 03:46:58,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:00,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:05,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:06,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:06,244 INFO L93 Difference]: Finished difference Result 6065 states and 8855 transitions. [2021-11-23 03:47:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:47:06,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 70 [2021-11-23 03:47:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:06,306 INFO L225 Difference]: With dead ends: 6065 [2021-11-23 03:47:06,307 INFO L226 Difference]: Without dead ends: 3989 [2021-11-23 03:47:06,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:06,341 INFO L933 BasicCegarLoop]: 3347 mSDtfsCounter, 2789 mSDsluCounter, 2995 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 9 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2799 SdHoareTripleChecker+Valid, 6044 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:06,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2799 Valid, 6044 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 615 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2021-11-23 03:47:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3989 states. [2021-11-23 03:47:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3989 to 3986. [2021-11-23 03:47:06,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 2440 states have (on average 1.2877049180327869) internal successors, (3142), 2475 states have internal predecessors, (3142), 1316 states have call successors, (1316), 231 states have call predecessors, (1316), 229 states have return successors, (1321), 1313 states have call predecessors, (1321), 1315 states have call successors, (1321) [2021-11-23 03:47:06,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 5779 transitions. [2021-11-23 03:47:06,865 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 5779 transitions. Word has length 70 [2021-11-23 03:47:06,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:06,868 INFO L470 AbstractCegarLoop]: Abstraction has 3986 states and 5779 transitions. [2021-11-23 03:47:06,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-23 03:47:06,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 5779 transitions. [2021-11-23 03:47:06,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 03:47:06,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:06,886 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:06,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:47:06,887 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:06,888 INFO L85 PathProgramCache]: Analyzing trace with hash -722120522, now seen corresponding path program 1 times [2021-11-23 03:47:06,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:06,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250407410] [2021-11-23 03:47:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:06,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-23 03:47:07,339 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:07,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250407410] [2021-11-23 03:47:07,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250407410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:07,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:07,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:47:07,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949824958] [2021-11-23 03:47:07,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:07,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:47:07,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:07,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:47:07,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:47:07,343 INFO L87 Difference]: Start difference. First operand 3986 states and 5779 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 03:47:13,891 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:16,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:21,297 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:22,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:24,583 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:24,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:24,792 INFO L93 Difference]: Finished difference Result 7853 states and 11421 transitions. [2021-11-23 03:47:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:47:24,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 79 [2021-11-23 03:47:24,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:24,887 INFO L225 Difference]: With dead ends: 7853 [2021-11-23 03:47:24,887 INFO L226 Difference]: Without dead ends: 7848 [2021-11-23 03:47:24,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:47:24,899 INFO L933 BasicCegarLoop]: 3350 mSDtfsCounter, 2815 mSDsluCounter, 6620 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2819 SdHoareTripleChecker+Valid, 9375 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:24,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2819 Valid, 9375 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 922 Invalid, 3 Unknown, 0 Unchecked, 17.1s Time] [2021-11-23 03:47:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2021-11-23 03:47:25,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 7837. [2021-11-23 03:47:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7837 states, 4793 states have (on average 1.2889630711454203) internal successors, (6178), 4864 states have internal predecessors, (6178), 2586 states have call successors, (2586), 461 states have call predecessors, (2586), 457 states have return successors, (2637), 2579 states have call predecessors, (2637), 2585 states have call successors, (2637) [2021-11-23 03:47:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7837 states to 7837 states and 11401 transitions. [2021-11-23 03:47:25,727 INFO L78 Accepts]: Start accepts. Automaton has 7837 states and 11401 transitions. Word has length 79 [2021-11-23 03:47:25,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:25,731 INFO L470 AbstractCegarLoop]: Abstraction has 7837 states and 11401 transitions. [2021-11-23 03:47:25,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-23 03:47:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 7837 states and 11401 transitions. [2021-11-23 03:47:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-23 03:47:25,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:25,759 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 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] [2021-11-23 03:47:25,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:47:25,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 588497298, now seen corresponding path program 1 times [2021-11-23 03:47:25,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:25,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985554254] [2021-11-23 03:47:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:25,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-11-23 03:47:26,195 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:26,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985554254] [2021-11-23 03:47:26,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985554254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:26,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:26,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:26,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229872244] [2021-11-23 03:47:26,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:26,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:26,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:26,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:26,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:26,198 INFO L87 Difference]: Start difference. First operand 7837 states and 11401 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:47:28,887 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:31,680 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:35,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:37,855 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:38,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:38,903 INFO L93 Difference]: Finished difference Result 18920 states and 27331 transitions. [2021-11-23 03:47:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:47:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 135 [2021-11-23 03:47:38,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:38,996 INFO L225 Difference]: With dead ends: 18920 [2021-11-23 03:47:38,996 INFO L226 Difference]: Without dead ends: 11104 [2021-11-23 03:47:39,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:39,061 INFO L933 BasicCegarLoop]: 2966 mSDtfsCounter, 1168 mSDsluCounter, 2823 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1174 SdHoareTripleChecker+Valid, 5495 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:39,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1174 Valid, 5495 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 739 Invalid, 4 Unknown, 0 Unchecked, 12.4s Time] [2021-11-23 03:47:39,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11104 states. [2021-11-23 03:47:39,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11104 to 11097. [2021-11-23 03:47:39,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11097 states, 6795 states have (on average 1.2838852097130242) internal successors, (8724), 6904 states have internal predecessors, (8724), 3568 states have call successors, (3568), 737 states have call predecessors, (3568), 733 states have return successors, (3659), 3559 states have call predecessors, (3659), 3567 states have call successors, (3659) [2021-11-23 03:47:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11097 states to 11097 states and 15951 transitions. [2021-11-23 03:47:39,801 INFO L78 Accepts]: Start accepts. Automaton has 11097 states and 15951 transitions. Word has length 135 [2021-11-23 03:47:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:39,803 INFO L470 AbstractCegarLoop]: Abstraction has 11097 states and 15951 transitions. [2021-11-23 03:47:39,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:47:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 11097 states and 15951 transitions. [2021-11-23 03:47:39,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 03:47:39,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:39,818 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:39,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:47:39,818 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1780909195, now seen corresponding path program 1 times [2021-11-23 03:47:39,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:39,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180654354] [2021-11-23 03:47:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:39,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-23 03:47:40,234 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:40,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180654354] [2021-11-23 03:47:40,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180654354] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:40,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:40,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:40,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433304433] [2021-11-23 03:47:40,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:40,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:40,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:40,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:40,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:40,237 INFO L87 Difference]: Start difference. First operand 11097 states and 15951 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:47:43,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:49,868 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:52,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:47:53,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:47:53,314 INFO L93 Difference]: Finished difference Result 30553 states and 44030 transitions. [2021-11-23 03:47:53,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:47:53,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 142 [2021-11-23 03:47:53,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:47:53,455 INFO L225 Difference]: With dead ends: 30553 [2021-11-23 03:47:53,456 INFO L226 Difference]: Without dead ends: 19477 [2021-11-23 03:47:53,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:53,538 INFO L933 BasicCegarLoop]: 4841 mSDtfsCounter, 2699 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2707 SdHoareTripleChecker+Valid, 7494 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:47:53,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2707 Valid, 7494 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 838 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-23 03:47:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19477 states. [2021-11-23 03:47:54,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19477 to 19465. [2021-11-23 03:47:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19465 states, 11955 states have (on average 1.2901714763697198) internal successors, (15424), 12132 states have internal predecessors, (15424), 6264 states have call successors, (6264), 1253 states have call predecessors, (6264), 1245 states have return successors, (6403), 6247 states have call predecessors, (6403), 6263 states have call successors, (6403) [2021-11-23 03:47:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19465 states to 19465 states and 28091 transitions. [2021-11-23 03:47:55,200 INFO L78 Accepts]: Start accepts. Automaton has 19465 states and 28091 transitions. Word has length 142 [2021-11-23 03:47:55,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:47:55,200 INFO L470 AbstractCegarLoop]: Abstraction has 19465 states and 28091 transitions. [2021-11-23 03:47:55,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 2 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-23 03:47:55,201 INFO L276 IsEmpty]: Start isEmpty. Operand 19465 states and 28091 transitions. [2021-11-23 03:47:55,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-23 03:47:55,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:55,226 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:55,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:47:55,227 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:47:55,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:55,227 INFO L85 PathProgramCache]: Analyzing trace with hash 768662312, now seen corresponding path program 1 times [2021-11-23 03:47:55,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:47:55,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191774851] [2021-11-23 03:47:55,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:55,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:47:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-11-23 03:47:55,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:47:55,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191774851] [2021-11-23 03:47:55,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191774851] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:47:55,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:47:55,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:47:55,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694033464] [2021-11-23 03:47:55,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:47:55,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:47:55,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:47:55,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:47:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:47:55,599 INFO L87 Difference]: Start difference. First operand 19465 states and 28091 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:48:00,216 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:03,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:06,136 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:06,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:06,515 INFO L93 Difference]: Finished difference Result 29589 states and 42670 transitions. [2021-11-23 03:48:06,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:48:06,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 159 [2021-11-23 03:48:06,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:06,571 INFO L225 Difference]: With dead ends: 29589 [2021-11-23 03:48:06,571 INFO L226 Difference]: Without dead ends: 10143 [2021-11-23 03:48:06,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:06,676 INFO L933 BasicCegarLoop]: 2691 mSDtfsCounter, 5 mSDsluCounter, 2985 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 5376 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:06,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 5376 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 10.5s Time] [2021-11-23 03:48:06,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10143 states. [2021-11-23 03:48:07,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10143 to 10137. [2021-11-23 03:48:07,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10137 states, 6230 states have (on average 1.2908507223113965) internal successors, (8042), 6319 states have internal predecessors, (8042), 3247 states have call successors, (3247), 663 states have call predecessors, (3247), 659 states have return successors, (3310), 3238 states have call predecessors, (3310), 3246 states have call successors, (3310) [2021-11-23 03:48:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10137 states to 10137 states and 14599 transitions. [2021-11-23 03:48:07,526 INFO L78 Accepts]: Start accepts. Automaton has 10137 states and 14599 transitions. Word has length 159 [2021-11-23 03:48:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:07,527 INFO L470 AbstractCegarLoop]: Abstraction has 10137 states and 14599 transitions. [2021-11-23 03:48:07,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 03:48:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 10137 states and 14599 transitions. [2021-11-23 03:48:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-23 03:48:07,559 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:07,560 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:07,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:48:07,560 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:07,561 INFO L85 PathProgramCache]: Analyzing trace with hash 697688357, now seen corresponding path program 1 times [2021-11-23 03:48:07,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:07,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130914412] [2021-11-23 03:48:07,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:07,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2021-11-23 03:48:07,890 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:07,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130914412] [2021-11-23 03:48:07,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130914412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:07,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:07,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:48:07,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801528683] [2021-11-23 03:48:07,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:07,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:48:07,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:48:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:07,893 INFO L87 Difference]: Start difference. First operand 10137 states and 14599 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-23 03:48:13,013 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:16,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:19,142 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:22,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:23,168 INFO L93 Difference]: Finished difference Result 26455 states and 38173 transitions. [2021-11-23 03:48:23,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:48:23,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) Word has length 185 [2021-11-23 03:48:23,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:23,248 INFO L225 Difference]: With dead ends: 26455 [2021-11-23 03:48:23,249 INFO L226 Difference]: Without dead ends: 16587 [2021-11-23 03:48:23,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:23,289 INFO L933 BasicCegarLoop]: 3791 mSDtfsCounter, 2602 mSDsluCounter, 2816 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 73 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2612 SdHoareTripleChecker+Valid, 6311 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:23,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2612 Valid, 6311 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 860 Invalid, 4 Unknown, 0 Unchecked, 14.8s Time] [2021-11-23 03:48:23,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16587 states. [2021-11-23 03:48:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16587 to 16576. [2021-11-23 03:48:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16576 states, 10219 states have (on average 1.2803601135140426) internal successors, (13084), 10366 states have internal predecessors, (13084), 5295 states have call successors, (5295), 1069 states have call predecessors, (5295), 1061 states have return successors, (5384), 5276 states have call predecessors, (5384), 5294 states have call successors, (5384) [2021-11-23 03:48:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16576 states to 16576 states and 23763 transitions. [2021-11-23 03:48:24,500 INFO L78 Accepts]: Start accepts. Automaton has 16576 states and 23763 transitions. Word has length 185 [2021-11-23 03:48:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:24,502 INFO L470 AbstractCegarLoop]: Abstraction has 16576 states and 23763 transitions. [2021-11-23 03:48:24,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (25), 3 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-23 03:48:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 16576 states and 23763 transitions. [2021-11-23 03:48:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-23 03:48:24,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:24,555 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:24,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:48:24,556 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:24,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1636222427, now seen corresponding path program 1 times [2021-11-23 03:48:24,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:24,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928257322] [2021-11-23 03:48:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:24,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:24,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-11-23 03:48:24,856 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:24,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928257322] [2021-11-23 03:48:24,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928257322] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:24,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:24,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:48:24,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162243854] [2021-11-23 03:48:24,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:24,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:48:24,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:48:24,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:24,858 INFO L87 Difference]: Start difference. First operand 16576 states and 23763 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 03:48:29,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:32,919 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:36,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:48:36,618 INFO L93 Difference]: Finished difference Result 24807 states and 35598 transitions. [2021-11-23 03:48:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:48:36,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 185 [2021-11-23 03:48:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:48:36,710 INFO L225 Difference]: With dead ends: 24807 [2021-11-23 03:48:36,711 INFO L226 Difference]: Without dead ends: 16592 [2021-11-23 03:48:36,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:48:36,745 INFO L933 BasicCegarLoop]: 2688 mSDtfsCounter, 4 mSDsluCounter, 2982 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 5370 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:48:36,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 5370 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 604 Invalid, 3 Unknown, 0 Unchecked, 11.3s Time] [2021-11-23 03:48:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16592 states. [2021-11-23 03:48:37,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16592 to 16592. [2021-11-23 03:48:37,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16592 states, 10231 states have (on average 1.2800312774899814) internal successors, (13096), 10382 states have internal predecessors, (13096), 5295 states have call successors, (5295), 1069 states have call predecessors, (5295), 1065 states have return successors, (5388), 5276 states have call predecessors, (5388), 5294 states have call successors, (5388) [2021-11-23 03:48:37,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16592 states to 16592 states and 23779 transitions. [2021-11-23 03:48:37,819 INFO L78 Accepts]: Start accepts. Automaton has 16592 states and 23779 transitions. Word has length 185 [2021-11-23 03:48:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:48:37,820 INFO L470 AbstractCegarLoop]: Abstraction has 16592 states and 23779 transitions. [2021-11-23 03:48:37,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 03:48:37,821 INFO L276 IsEmpty]: Start isEmpty. Operand 16592 states and 23779 transitions. [2021-11-23 03:48:37,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-23 03:48:37,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:48:37,862 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:48:37,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:48:37,862 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:48:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:48:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1326152026, now seen corresponding path program 1 times [2021-11-23 03:48:37,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:48:37,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104867252] [2021-11-23 03:48:37,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:37,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:48:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-11-23 03:48:38,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:48:38,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104867252] [2021-11-23 03:48:38,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104867252] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:48:38,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:48:38,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 03:48:38,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381481049] [2021-11-23 03:48:38,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:48:38,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:48:38,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:48:38,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:48:38,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:48:38,469 INFO L87 Difference]: Start difference. First operand 16592 states and 23779 transitions. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-23 03:48:47,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:48:50,126 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:07,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:09,276 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:12,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:15,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:18,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:20,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:22,486 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:24,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:31,075 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:33,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:34,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:36,734 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:38,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:40,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:42,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:44,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:46,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:49,066 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:51,327 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:53,751 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:56,258 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:49:58,443 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:00,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:02,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:04,540 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:06,551 INFO L93 Difference]: Finished difference Result 34665 states and 49734 transitions. [2021-11-23 03:50:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:50:06,551 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) Word has length 186 [2021-11-23 03:50:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:06,639 INFO L225 Difference]: With dead ends: 34665 [2021-11-23 03:50:06,639 INFO L226 Difference]: Without dead ends: 18342 [2021-11-23 03:50:06,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:50:06,696 INFO L933 BasicCegarLoop]: 2323 mSDtfsCounter, 5835 mSDsluCounter, 3802 mSDsCounter, 0 mSdLazyCounter, 14204 mSolverCounterSat, 4721 mSolverCounterUnsat, 23 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 83.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6584 SdHoareTripleChecker+Valid, 5693 SdHoareTripleChecker+Invalid, 18948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4721 IncrementalHoareTripleChecker+Valid, 14204 IncrementalHoareTripleChecker+Invalid, 23 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 87.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:06,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6584 Valid, 5693 Invalid, 18948 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4721 Valid, 14204 Invalid, 23 Unknown, 0 Unchecked, 87.0s Time] [2021-11-23 03:50:06,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18342 states. [2021-11-23 03:50:07,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18342 to 18216. [2021-11-23 03:50:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18216 states, 11179 states have (on average 1.274532605778692) internal successors, (14248), 11358 states have internal predecessors, (14248), 5842 states have call successors, (5842), 1173 states have call predecessors, (5842), 1194 states have return successors, (6008), 5834 states have call predecessors, (6008), 5841 states have call successors, (6008) [2021-11-23 03:50:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18216 states to 18216 states and 26098 transitions. [2021-11-23 03:50:07,966 INFO L78 Accepts]: Start accepts. Automaton has 18216 states and 26098 transitions. Word has length 186 [2021-11-23 03:50:07,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:07,967 INFO L470 AbstractCegarLoop]: Abstraction has 18216 states and 26098 transitions. [2021-11-23 03:50:07,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 8 states have internal predecessors, (86), 4 states have call successors, (26), 4 states have call predecessors, (26), 2 states have return successors, (25), 5 states have call predecessors, (25), 3 states have call successors, (25) [2021-11-23 03:50:07,967 INFO L276 IsEmpty]: Start isEmpty. Operand 18216 states and 26098 transitions. [2021-11-23 03:50:08,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-23 03:50:08,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:08,006 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:08,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:50:08,006 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:08,007 INFO L85 PathProgramCache]: Analyzing trace with hash -881143238, now seen corresponding path program 1 times [2021-11-23 03:50:08,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:08,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371195565] [2021-11-23 03:50:08,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:08,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:08,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2021-11-23 03:50:08,317 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:08,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371195565] [2021-11-23 03:50:08,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371195565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:08,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:08,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:50:08,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724824429] [2021-11-23 03:50:08,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:08,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:50:08,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:08,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:50:08,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:50:08,321 INFO L87 Difference]: Start difference. First operand 18216 states and 26098 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 03:50:10,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:16,708 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:19,336 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:21,360 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:25,742 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:25,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:25,933 INFO L93 Difference]: Finished difference Result 27941 states and 40081 transitions. [2021-11-23 03:50:25,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:25,934 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) Word has length 192 [2021-11-23 03:50:25,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:25,999 INFO L225 Difference]: With dead ends: 27941 [2021-11-23 03:50:25,999 INFO L226 Difference]: Without dead ends: 18288 [2021-11-23 03:50:26,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:26,033 INFO L933 BasicCegarLoop]: 2690 mSDtfsCounter, 7 mSDsluCounter, 5972 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 5 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 8061 SdHoareTripleChecker+Invalid, 924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:26,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 8061 Invalid, 924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 915 Invalid, 4 Unknown, 0 Unchecked, 17.1s Time] [2021-11-23 03:50:26,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18288 states. [2021-11-23 03:50:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18288 to 18238. [2021-11-23 03:50:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18238 states, 11199 states have (on average 1.2740423252076079) internal successors, (14268), 11379 states have internal predecessors, (14268), 5843 states have call successors, (5843), 1173 states have call predecessors, (5843), 1195 states have return successors, (6013), 5835 states have call predecessors, (6013), 5842 states have call successors, (6013) [2021-11-23 03:50:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18238 states to 18238 states and 26124 transitions. [2021-11-23 03:50:27,198 INFO L78 Accepts]: Start accepts. Automaton has 18238 states and 26124 transitions. Word has length 192 [2021-11-23 03:50:27,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:27,199 INFO L470 AbstractCegarLoop]: Abstraction has 18238 states and 26124 transitions. [2021-11-23 03:50:27,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (25), 2 states have call predecessors, (25), 1 states have call successors, (25) [2021-11-23 03:50:27,200 INFO L276 IsEmpty]: Start isEmpty. Operand 18238 states and 26124 transitions. [2021-11-23 03:50:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-23 03:50:27,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:27,400 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:27,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:50:27,401 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:50:27,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:27,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1030791556, now seen corresponding path program 1 times [2021-11-23 03:50:27,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:27,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067767658] [2021-11-23 03:50:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:27,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 524 trivial. 0 not checked. [2021-11-23 03:50:28,044 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:28,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067767658] [2021-11-23 03:50:28,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067767658] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:28,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:28,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:50:28,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920894052] [2021-11-23 03:50:28,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:28,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:50:28,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:28,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:50:28,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:28,048 INFO L87 Difference]: Start difference. First operand 18238 states and 26124 transitions. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 03:50:37,171 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:39,353 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:47,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:51,120 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:53,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:55,590 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:57,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:50:59,859 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:02,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:02,275 INFO L93 Difference]: Finished difference Result 27419 states and 39303 transitions. [2021-11-23 03:51:02,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:51:02,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) Word has length 220 [2021-11-23 03:51:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:02,408 INFO L225 Difference]: With dead ends: 27419 [2021-11-23 03:51:02,408 INFO L226 Difference]: Without dead ends: 27413 [2021-11-23 03:51:02,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:51:02,420 INFO L933 BasicCegarLoop]: 2136 mSDtfsCounter, 4108 mSDsluCounter, 2837 mSDsCounter, 0 mSdLazyCounter, 6478 mSolverCounterSat, 3086 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4755 SdHoareTripleChecker+Valid, 4741 SdHoareTripleChecker+Invalid, 9570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3086 IncrementalHoareTripleChecker+Valid, 6478 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:02,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4755 Valid, 4741 Invalid, 9570 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3086 Valid, 6478 Invalid, 6 Unknown, 0 Unchecked, 33.6s Time] [2021-11-23 03:51:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27413 states. [2021-11-23 03:51:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27413 to 27327. [2021-11-23 03:51:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27327 states, 16765 states have (on average 1.27354607813898) internal successors, (21351), 17035 states have internal predecessors, (21351), 8741 states have call successors, (8741), 1790 states have call predecessors, (8741), 1820 states have return successors, (9074), 8725 states have call predecessors, (9074), 8740 states have call successors, (9074) [2021-11-23 03:51:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27327 states to 27327 states and 39166 transitions. [2021-11-23 03:51:03,964 INFO L78 Accepts]: Start accepts. Automaton has 27327 states and 39166 transitions. Word has length 220 [2021-11-23 03:51:03,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:03,964 INFO L470 AbstractCegarLoop]: Abstraction has 27327 states and 39166 transitions. [2021-11-23 03:51:03,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 4 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 3 states have call predecessors, (28), 3 states have call successors, (28) [2021-11-23 03:51:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 27327 states and 39166 transitions. [2021-11-23 03:51:04,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-11-23 03:51:04,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:04,009 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 7, 7, 7, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:04,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:51:04,010 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:04,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash -692928577, now seen corresponding path program 1 times [2021-11-23 03:51:04,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:04,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745435153] [2021-11-23 03:51:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:04,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-11-23 03:51:04,901 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745435153] [2021-11-23 03:51:04,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745435153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:04,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:04,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 03:51:04,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124066367] [2021-11-23 03:51:04,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:04,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:51:04,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:51:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:51:04,904 INFO L87 Difference]: Start difference. First operand 27327 states and 39166 transitions. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 4 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 5 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-23 03:51:18,957 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:21,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:28,396 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:30,424 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:31,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:33,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:35,386 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:37,420 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:39,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:41,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:46,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:51,306 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:51:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:53,849 INFO L93 Difference]: Finished difference Result 45322 states and 65022 transitions. [2021-11-23 03:51:53,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:51:53,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 4 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 5 states have call predecessors, (35), 3 states have call successors, (35) Word has length 277 [2021-11-23 03:51:53,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:53,935 INFO L225 Difference]: With dead ends: 45322 [2021-11-23 03:51:53,935 INFO L226 Difference]: Without dead ends: 26568 [2021-11-23 03:51:53,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:51:53,980 INFO L933 BasicCegarLoop]: 2373 mSDtfsCounter, 5865 mSDsluCounter, 3232 mSDsCounter, 0 mSdLazyCounter, 10782 mSolverCounterSat, 4749 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6609 SdHoareTripleChecker+Valid, 5240 SdHoareTripleChecker+Invalid, 15540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4749 IncrementalHoareTripleChecker+Valid, 10782 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:53,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6609 Valid, 5240 Invalid, 15540 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4749 Valid, 10782 Invalid, 9 Unknown, 0 Unchecked, 47.9s Time] [2021-11-23 03:51:53,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26568 states. [2021-11-23 03:51:54,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26568 to 26467. [2021-11-23 03:51:54,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26467 states, 16275 states have (on average 1.2748387096774194) internal successors, (20748), 16531 states have internal predecessors, (20748), 8466 states have call successors, (8466), 1697 states have call predecessors, (8466), 1725 states have return successors, (8731), 8456 states have call predecessors, (8731), 8465 states have call successors, (8731) [2021-11-23 03:51:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26467 states to 26467 states and 37945 transitions. [2021-11-23 03:51:55,050 INFO L78 Accepts]: Start accepts. Automaton has 26467 states and 37945 transitions. Word has length 277 [2021-11-23 03:51:55,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:55,051 INFO L470 AbstractCegarLoop]: Abstraction has 26467 states and 37945 transitions. [2021-11-23 03:51:55,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 7 states have internal predecessors, (122), 4 states have call successors, (36), 4 states have call predecessors, (36), 3 states have return successors, (35), 5 states have call predecessors, (35), 3 states have call successors, (35) [2021-11-23 03:51:55,052 INFO L276 IsEmpty]: Start isEmpty. Operand 26467 states and 37945 transitions. [2021-11-23 03:51:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 558 [2021-11-23 03:51:55,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:55,143 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 16, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:55,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:51:55,143 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:51:55,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:55,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1039182390, now seen corresponding path program 1 times [2021-11-23 03:51:55,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:55,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566023209] [2021-11-23 03:51:55,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:55,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:55,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1102 trivial. 0 not checked. [2021-11-23 03:51:55,926 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:55,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566023209] [2021-11-23 03:51:55,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566023209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:55,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:55,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:51:55,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958059533] [2021-11-23 03:51:55,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:55,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:51:55,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:55,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:51:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:51:55,930 INFO L87 Difference]: Start difference. First operand 26467 states and 37945 transitions. Second operand has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 03:52:01,650 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:04,511 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:06,591 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:11,030 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:11,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:11,500 INFO L93 Difference]: Finished difference Result 52797 states and 75838 transitions. [2021-11-23 03:52:11,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:52:11,500 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 557 [2021-11-23 03:52:11,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:11,579 INFO L225 Difference]: With dead ends: 52797 [2021-11-23 03:52:11,580 INFO L226 Difference]: Without dead ends: 26599 [2021-11-23 03:52:11,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:52:11,640 INFO L933 BasicCegarLoop]: 2693 mSDtfsCounter, 9 mSDsluCounter, 5959 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 8055 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:11,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 8055 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 927 Invalid, 4 Unknown, 0 Unchecked, 14.8s Time] [2021-11-23 03:52:11,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26599 states. [2021-11-23 03:52:12,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26599 to 26491. [2021-11-23 03:52:12,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26491 states, 16299 states have (on average 1.274434014356709) internal successors, (20772), 16555 states have internal predecessors, (20772), 8466 states have call successors, (8466), 1697 states have call predecessors, (8466), 1725 states have return successors, (8731), 8456 states have call predecessors, (8731), 8465 states have call successors, (8731) [2021-11-23 03:52:12,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26491 states to 26491 states and 37969 transitions. [2021-11-23 03:52:12,936 INFO L78 Accepts]: Start accepts. Automaton has 26491 states and 37969 transitions. Word has length 557 [2021-11-23 03:52:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:12,937 INFO L470 AbstractCegarLoop]: Abstraction has 26491 states and 37969 transitions. [2021-11-23 03:52:12,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.5) internal successors, (198), 4 states have internal predecessors, (198), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2021-11-23 03:52:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 26491 states and 37969 transitions. [2021-11-23 03:52:12,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2021-11-23 03:52:12,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:12,996 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 16, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:12,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:52:12,997 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:12,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:12,998 INFO L85 PathProgramCache]: Analyzing trace with hash -965162936, now seen corresponding path program 1 times [2021-11-23 03:52:12,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:12,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716207267] [2021-11-23 03:52:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:12,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1194 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1185 trivial. 0 not checked. [2021-11-23 03:52:13,500 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:13,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716207267] [2021-11-23 03:52:13,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716207267] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:13,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:13,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:52:13,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687021868] [2021-11-23 03:52:13,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:13,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:52:13,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:13,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:52:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:52:13,503 INFO L87 Difference]: Start difference. First operand 26491 states and 37969 transitions. Second operand has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 2 states have call successors, (87), 2 states have call predecessors, (87), 3 states have return successors, (86), 3 states have call predecessors, (86), 2 states have call successors, (86) [2021-11-23 03:52:18,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:25,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:27,332 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:31,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:34,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:34,022 INFO L93 Difference]: Finished difference Result 52761 states and 75796 transitions. [2021-11-23 03:52:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:52:34,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 2 states have call successors, (87), 2 states have call predecessors, (87), 3 states have return successors, (86), 3 states have call predecessors, (86), 2 states have call successors, (86) Word has length 572 [2021-11-23 03:52:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:34,115 INFO L225 Difference]: With dead ends: 52761 [2021-11-23 03:52:34,115 INFO L226 Difference]: Without dead ends: 26539 [2021-11-23 03:52:34,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:52:34,196 INFO L933 BasicCegarLoop]: 2688 mSDtfsCounter, 1 mSDsluCounter, 8950 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 4 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10732 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:34,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 10732 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1225 Invalid, 3 Unknown, 0 Unchecked, 19.7s Time] [2021-11-23 03:52:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26539 states. [2021-11-23 03:52:35,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26539 to 26539. [2021-11-23 03:52:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26539 states, 16335 states have (on average 1.2738292011019283) internal successors, (20808), 16591 states have internal predecessors, (20808), 8466 states have call successors, (8466), 1697 states have call predecessors, (8466), 1737 states have return successors, (8779), 8468 states have call predecessors, (8779), 8465 states have call successors, (8779) [2021-11-23 03:52:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26539 states to 26539 states and 38053 transitions. [2021-11-23 03:52:35,511 INFO L78 Accepts]: Start accepts. Automaton has 26539 states and 38053 transitions. Word has length 572 [2021-11-23 03:52:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:35,512 INFO L470 AbstractCegarLoop]: Abstraction has 26539 states and 38053 transitions. [2021-11-23 03:52:35,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 39.2) internal successors, (196), 4 states have internal predecessors, (196), 2 states have call successors, (87), 2 states have call predecessors, (87), 3 states have return successors, (86), 3 states have call predecessors, (86), 2 states have call successors, (86) [2021-11-23 03:52:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 26539 states and 38053 transitions. [2021-11-23 03:52:35,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 575 [2021-11-23 03:52:35,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:35,574 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 16, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:35,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:52:35,574 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:35,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:35,575 INFO L85 PathProgramCache]: Analyzing trace with hash 559606064, now seen corresponding path program 1 times [2021-11-23 03:52:35,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:35,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101989580] [2021-11-23 03:52:35,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:35,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 1156 trivial. 0 not checked. [2021-11-23 03:52:36,285 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:36,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101989580] [2021-11-23 03:52:36,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101989580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:36,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:36,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:52:36,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903009270] [2021-11-23 03:52:36,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:36,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:52:36,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:36,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:52:36,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:52:36,290 INFO L87 Difference]: Start difference. First operand 26539 states and 38053 transitions. Second operand has 5 states, 5 states have (on average 40.2) internal successors, (201), 4 states have internal predecessors, (201), 2 states have call successors, (86), 2 states have call predecessors, (86), 3 states have return successors, (85), 3 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-23 03:52:44,935 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:47,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:50,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:53,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:55,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:52:56,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:56,548 INFO L93 Difference]: Finished difference Result 52913 states and 76255 transitions. [2021-11-23 03:52:56,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:52:56,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 4 states have internal predecessors, (201), 2 states have call successors, (86), 2 states have call predecessors, (86), 3 states have return successors, (85), 3 states have call predecessors, (85), 2 states have call successors, (85) Word has length 574 [2021-11-23 03:52:56,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:56,646 INFO L225 Difference]: With dead ends: 52913 [2021-11-23 03:52:56,647 INFO L226 Difference]: Without dead ends: 26643 [2021-11-23 03:52:56,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:52:56,727 INFO L933 BasicCegarLoop]: 2687 mSDtfsCounter, 2 mSDsluCounter, 8959 mSDsCounter, 0 mSdLazyCounter, 1214 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 10743 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1214 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:56,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 10743 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1214 Invalid, 4 Unknown, 0 Unchecked, 19.5s Time] [2021-11-23 03:52:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26643 states. [2021-11-23 03:52:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26643 to 26587. [2021-11-23 03:52:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26587 states, 16371 states have (on average 1.2732270478284773) internal successors, (20844), 16627 states have internal predecessors, (20844), 8466 states have call successors, (8466), 1697 states have call predecessors, (8466), 1749 states have return successors, (8908), 8480 states have call predecessors, (8908), 8465 states have call successors, (8908) [2021-11-23 03:52:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26587 states to 26587 states and 38218 transitions. [2021-11-23 03:52:58,031 INFO L78 Accepts]: Start accepts. Automaton has 26587 states and 38218 transitions. Word has length 574 [2021-11-23 03:52:58,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:58,032 INFO L470 AbstractCegarLoop]: Abstraction has 26587 states and 38218 transitions. [2021-11-23 03:52:58,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.2) internal successors, (201), 4 states have internal predecessors, (201), 2 states have call successors, (86), 2 states have call predecessors, (86), 3 states have return successors, (85), 3 states have call predecessors, (85), 2 states have call successors, (85) [2021-11-23 03:52:58,033 INFO L276 IsEmpty]: Start isEmpty. Operand 26587 states and 38218 transitions. [2021-11-23 03:52:58,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 589 [2021-11-23 03:52:58,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:58,091 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 15, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:58,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:52:58,091 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:52:58,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:58,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1061161227, now seen corresponding path program 1 times [2021-11-23 03:52:58,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:58,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085371179] [2021-11-23 03:52:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:58,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2021-11-23 03:52:59,158 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:59,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085371179] [2021-11-23 03:52:59,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085371179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:52:59,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:52:59,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 03:52:59,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315505124] [2021-11-23 03:52:59,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:52:59,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:52:59,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:59,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:52:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:52:59,160 INFO L87 Difference]: Start difference. First operand 26587 states and 38218 transitions. Second operand has 9 states, 9 states have (on average 22.555555555555557) internal successors, (203), 7 states have internal predecessors, (203), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (88), 5 states have call predecessors, (88), 3 states have call successors, (88) [2021-11-23 03:53:00,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:14,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:16,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:19,820 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:24,345 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:26,995 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:29,003 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:30,436 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:31,869 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:33,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:34,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:34,383 INFO L93 Difference]: Finished difference Result 53081 states and 76568 transitions. [2021-11-23 03:53:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:53:34,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 22.555555555555557) internal successors, (203), 7 states have internal predecessors, (203), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (88), 5 states have call predecessors, (88), 3 states have call successors, (88) Word has length 588 [2021-11-23 03:53:34,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:34,466 INFO L225 Difference]: With dead ends: 53081 [2021-11-23 03:53:34,466 INFO L226 Difference]: Without dead ends: 26763 [2021-11-23 03:53:34,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:53:34,527 INFO L933 BasicCegarLoop]: 2719 mSDtfsCounter, 14 mSDsluCounter, 21117 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 21720 SdHoareTripleChecker+Invalid, 2491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:34,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 21720 Invalid, 2491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2485 Invalid, 5 Unknown, 0 Unchecked, 34.5s Time] [2021-11-23 03:53:34,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26763 states. [2021-11-23 03:53:35,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26763 to 26635. [2021-11-23 03:53:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26635 states, 16407 states have (on average 1.2716523435119156) internal successors, (20864), 16663 states have internal predecessors, (20864), 8466 states have call successors, (8466), 1697 states have call predecessors, (8466), 1761 states have return successors, (8920), 8492 states have call predecessors, (8920), 8465 states have call successors, (8920) [2021-11-23 03:53:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26635 states to 26635 states and 38250 transitions. [2021-11-23 03:53:35,762 INFO L78 Accepts]: Start accepts. Automaton has 26635 states and 38250 transitions. Word has length 588 [2021-11-23 03:53:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:35,764 INFO L470 AbstractCegarLoop]: Abstraction has 26635 states and 38250 transitions. [2021-11-23 03:53:35,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.555555555555557) internal successors, (203), 7 states have internal predecessors, (203), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (88), 5 states have call predecessors, (88), 3 states have call successors, (88) [2021-11-23 03:53:35,764 INFO L276 IsEmpty]: Start isEmpty. Operand 26635 states and 38250 transitions. [2021-11-23 03:53:35,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-11-23 03:53:35,817 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:35,817 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 15, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:35,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:53:35,818 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:53:35,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:35,819 INFO L85 PathProgramCache]: Analyzing trace with hash 952091999, now seen corresponding path program 1 times [2021-11-23 03:53:35,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:35,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029417270] [2021-11-23 03:53:35,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:35,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:36,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1227 trivial. 0 not checked. [2021-11-23 03:53:36,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:36,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029417270] [2021-11-23 03:53:36,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029417270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:53:36,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279594393] [2021-11-23 03:53:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:36,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:36,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:36,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:36,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:53:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 8194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:53:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 1131 trivial. 0 not checked. [2021-11-23 03:53:40,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:53:40,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279594393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:53:40,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:53:40,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-23 03:53:40,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227393205] [2021-11-23 03:53:40,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:53:40,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:53:40,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:40,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:53:40,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:53:40,107 INFO L87 Difference]: Start difference. First operand 26635 states and 38250 transitions. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 2 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-23 03:53:44,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:50,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:52,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:56,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:59,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:53:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:59,559 INFO L93 Difference]: Finished difference Result 53133 states and 76436 transitions. [2021-11-23 03:53:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:53:59,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 2 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) Word has length 594 [2021-11-23 03:53:59,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:59,784 INFO L225 Difference]: With dead ends: 53133 [2021-11-23 03:53:59,785 INFO L226 Difference]: Without dead ends: 26767 [2021-11-23 03:53:59,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:53:59,848 INFO L933 BasicCegarLoop]: 2688 mSDtfsCounter, 14 mSDsluCounter, 8944 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 10738 SdHoareTripleChecker+Invalid, 1238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:59,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 10738 Invalid, 1238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1234 Invalid, 3 Unknown, 0 Unchecked, 18.8s Time] [2021-11-23 03:53:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26767 states. [2021-11-23 03:54:00,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26767 to 26671. [2021-11-23 03:54:00,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26671 states, 16443 states have (on average 1.2710575928966734) internal successors, (20900), 16699 states have internal predecessors, (20900), 8466 states have call successors, (8466), 1697 states have call predecessors, (8466), 1761 states have return successors, (8920), 8492 states have call predecessors, (8920), 8465 states have call successors, (8920) [2021-11-23 03:54:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26671 states to 26671 states and 38286 transitions. [2021-11-23 03:54:01,040 INFO L78 Accepts]: Start accepts. Automaton has 26671 states and 38286 transitions. Word has length 594 [2021-11-23 03:54:01,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:01,040 INFO L470 AbstractCegarLoop]: Abstraction has 26671 states and 38286 transitions. [2021-11-23 03:54:01,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 2 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (89), 2 states have call predecessors, (89), 2 states have call successors, (89) [2021-11-23 03:54:01,041 INFO L276 IsEmpty]: Start isEmpty. Operand 26671 states and 38286 transitions. [2021-11-23 03:54:01,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2021-11-23 03:54:01,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:01,121 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 15, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:01,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:01,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:54:01,348 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:01,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:01,349 INFO L85 PathProgramCache]: Analyzing trace with hash -2019448739, now seen corresponding path program 1 times [2021-11-23 03:54:01,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:01,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868837688] [2021-11-23 03:54:01,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:01,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:01,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:02,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2021-11-23 03:54:02,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:02,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868837688] [2021-11-23 03:54:02,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868837688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:54:02,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370630620] [2021-11-23 03:54:02,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:02,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:02,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:02,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:02,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:54:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:04,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 8372 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:54:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:05,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 1043 trivial. 0 not checked. [2021-11-23 03:54:05,481 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:54:05,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370630620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:05,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:54:05,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-23 03:54:05,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37033885] [2021-11-23 03:54:05,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:05,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:05,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:05,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:05,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:54:05,484 INFO L87 Difference]: Start difference. First operand 26671 states and 38286 transitions. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-23 03:54:12,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:15,330 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:18,086 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:23,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:23,625 INFO L93 Difference]: Finished difference Result 54349 states and 78386 transitions. [2021-11-23 03:54:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:54:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) Word has length 611 [2021-11-23 03:54:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:23,829 INFO L225 Difference]: With dead ends: 54349 [2021-11-23 03:54:23,829 INFO L226 Difference]: Without dead ends: 27947 [2021-11-23 03:54:23,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:54:23,894 INFO L933 BasicCegarLoop]: 2812 mSDtfsCounter, 57 mSDsluCounter, 6107 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 18 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 8316 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:23,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 8316 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 937 Invalid, 4 Unknown, 0 Unchecked, 17.4s Time] [2021-11-23 03:54:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27947 states. [2021-11-23 03:54:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27947 to 26707. [2021-11-23 03:54:25,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26707 states, 16467 states have (on average 1.2706625371956033) internal successors, (20924), 16723 states have internal predecessors, (20924), 8478 states have call successors, (8478), 1697 states have call predecessors, (8478), 1761 states have return successors, (8932), 8504 states have call predecessors, (8932), 8477 states have call successors, (8932) [2021-11-23 03:54:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26707 states to 26707 states and 38334 transitions. [2021-11-23 03:54:25,134 INFO L78 Accepts]: Start accepts. Automaton has 26707 states and 38334 transitions. Word has length 611 [2021-11-23 03:54:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:25,135 INFO L470 AbstractCegarLoop]: Abstraction has 26707 states and 38334 transitions. [2021-11-23 03:54:25,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 2 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (95), 2 states have call predecessors, (95), 2 states have call successors, (95) [2021-11-23 03:54:25,135 INFO L276 IsEmpty]: Start isEmpty. Operand 26707 states and 38334 transitions. [2021-11-23 03:54:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2021-11-23 03:54:25,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:25,191 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 15, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:25,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:25,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 03:54:25,392 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:25,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1327658736, now seen corresponding path program 1 times [2021-11-23 03:54:25,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530315118] [2021-11-23 03:54:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:25,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:26,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1274 trivial. 0 not checked. [2021-11-23 03:54:26,165 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:26,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530315118] [2021-11-23 03:54:26,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530315118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:54:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426808219] [2021-11-23 03:54:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:26,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:26,167 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:26,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:54:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 8628 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:54:28,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 1114 trivial. 0 not checked. [2021-11-23 03:54:29,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:54:29,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426808219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:29,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:54:29,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-23 03:54:29,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851352503] [2021-11-23 03:54:29,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:29,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:29,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:29,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:29,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:54:29,646 INFO L87 Difference]: Start difference. First operand 26707 states and 38334 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 3 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2021-11-23 03:54:37,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:39,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:41,837 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:46,378 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:54:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:46,881 INFO L93 Difference]: Finished difference Result 54421 states and 78482 transitions. [2021-11-23 03:54:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:54:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 3 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) Word has length 650 [2021-11-23 03:54:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:46,973 INFO L225 Difference]: With dead ends: 54421 [2021-11-23 03:54:46,973 INFO L226 Difference]: Without dead ends: 27983 [2021-11-23 03:54:47,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:54:47,050 INFO L933 BasicCegarLoop]: 2815 mSDtfsCounter, 55 mSDsluCounter, 6114 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 8326 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:47,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 8326 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 934 Invalid, 4 Unknown, 0 Unchecked, 16.5s Time] [2021-11-23 03:54:47,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27983 states. [2021-11-23 03:54:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27983 to 26743. [2021-11-23 03:54:48,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26743 states, 16491 states have (on average 1.2702686313746891) internal successors, (20948), 16747 states have internal predecessors, (20948), 8490 states have call successors, (8490), 1697 states have call predecessors, (8490), 1761 states have return successors, (8944), 8516 states have call predecessors, (8944), 8489 states have call successors, (8944) [2021-11-23 03:54:48,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26743 states to 26743 states and 38382 transitions. [2021-11-23 03:54:48,282 INFO L78 Accepts]: Start accepts. Automaton has 26743 states and 38382 transitions. Word has length 650 [2021-11-23 03:54:48,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:48,283 INFO L470 AbstractCegarLoop]: Abstraction has 26743 states and 38382 transitions. [2021-11-23 03:54:48,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 4 states have internal predecessors, (231), 3 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2021-11-23 03:54:48,283 INFO L276 IsEmpty]: Start isEmpty. Operand 26743 states and 38382 transitions. [2021-11-23 03:54:48,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2021-11-23 03:54:48,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:48,417 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 15, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:48,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:48,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 03:54:48,636 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:54:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:48,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1800066169, now seen corresponding path program 1 times [2021-11-23 03:54:48,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:48,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6612844] [2021-11-23 03:54:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:48,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:49,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1274 trivial. 0 not checked. [2021-11-23 03:54:49,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:54:49,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6612844] [2021-11-23 03:54:49,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6612844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:54:49,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353976019] [2021-11-23 03:54:49,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:49,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:49,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:49,545 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:49,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:54:51,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:51,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 8663 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:54:51,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1283 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 1114 trivial. 0 not checked. [2021-11-23 03:54:52,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:54:52,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353976019] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:52,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:54:52,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-11-23 03:54:52,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363890997] [2021-11-23 03:54:52,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:52,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:54:52,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:52,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:54:52,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:54:52,879 INFO L87 Difference]: Start difference. First operand 26743 states and 38382 transitions. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 3 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2021-11-23 03:54:59,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:01,375 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:03,442 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:08,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:10,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:55:11,300 INFO L93 Difference]: Finished difference Result 53433 states and 76844 transitions. [2021-11-23 03:55:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:55:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 3 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) Word has length 652 [2021-11-23 03:55:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:55:11,385 INFO L225 Difference]: With dead ends: 53433 [2021-11-23 03:55:11,385 INFO L226 Difference]: Without dead ends: 26959 [2021-11-23 03:55:11,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 650 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:55:11,463 INFO L933 BasicCegarLoop]: 2709 mSDtfsCounter, 18 mSDsluCounter, 8971 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 15 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 10786 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:55:11,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 10786 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1232 Invalid, 4 Unknown, 0 Unchecked, 17.8s Time] [2021-11-23 03:55:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26959 states. [2021-11-23 03:55:12,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26959 to 26755. [2021-11-23 03:55:12,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26755 states, 16503 states have (on average 1.2700721081015574) internal successors, (20960), 16759 states have internal predecessors, (20960), 8490 states have call successors, (8490), 1697 states have call predecessors, (8490), 1761 states have return successors, (8944), 8516 states have call predecessors, (8944), 8489 states have call successors, (8944) [2021-11-23 03:55:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26755 states to 26755 states and 38394 transitions. [2021-11-23 03:55:12,879 INFO L78 Accepts]: Start accepts. Automaton has 26755 states and 38394 transitions. Word has length 652 [2021-11-23 03:55:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:55:12,880 INFO L470 AbstractCegarLoop]: Abstraction has 26755 states and 38394 transitions. [2021-11-23 03:55:12,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 3 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (102), 3 states have call predecessors, (102), 3 states have call successors, (102) [2021-11-23 03:55:12,880 INFO L276 IsEmpty]: Start isEmpty. Operand 26755 states and 38394 transitions. [2021-11-23 03:55:12,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2021-11-23 03:55:12,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:55:12,965 INFO L514 BasicCegarLoop]: trace histogram [18, 16, 16, 15, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:55:13,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:55:13,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:13,192 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:55:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:55:13,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1385961134, now seen corresponding path program 1 times [2021-11-23 03:55:13,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:55:13,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532953952] [2021-11-23 03:55:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:13,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:55:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-11-23 03:55:14,034 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:55:14,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532953952] [2021-11-23 03:55:14,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532953952] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:55:14,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390862044] [2021-11-23 03:55:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:14,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:14,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:14,036 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:14,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:55:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:16,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 8758 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:55:16,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 306 proven. 0 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2021-11-23 03:55:17,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:55:17,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390862044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:55:17,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:55:17,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-23 03:55:17,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051925267] [2021-11-23 03:55:17,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:55:17,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:55:17,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:55:17,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:55:17,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:55:17,806 INFO L87 Difference]: Start difference. First operand 26755 states and 38394 transitions. Second operand has 6 states, 6 states have (on average 39.0) internal successors, (234), 5 states have internal predecessors, (234), 3 states have call successors, (103), 3 states have call predecessors, (103), 3 states have return successors, (102), 3 states have call predecessors, (102), 2 states have call successors, (102) [2021-11-23 03:55:23,036 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:30,376 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:33,190 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:35,215 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:37,235 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:40,194 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:46,024 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:55,071 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:55:57,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:02,689 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:04,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:06,722 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:07,253 INFO L93 Difference]: Finished difference Result 79746 states and 114462 transitions. [2021-11-23 03:56:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:56:07,254 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 39.0) internal successors, (234), 5 states have internal predecessors, (234), 3 states have call successors, (103), 3 states have call predecessors, (103), 3 states have return successors, (102), 3 states have call predecessors, (102), 2 states have call successors, (102) Word has length 669 [2021-11-23 03:56:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:07,499 INFO L225 Difference]: With dead ends: 79746 [2021-11-23 03:56:07,500 INFO L226 Difference]: Without dead ends: 79741 [2021-11-23 03:56:07,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 667 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:56:07,524 INFO L933 BasicCegarLoop]: 6065 mSDtfsCounter, 5381 mSDsluCounter, 13395 mSDsCounter, 0 mSdLazyCounter, 9109 mSolverCounterSat, 15 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5390 SdHoareTripleChecker+Valid, 17651 SdHoareTripleChecker+Invalid, 9133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 9109 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:07,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5390 Valid, 17651 Invalid, 9133 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [15 Valid, 9109 Invalid, 9 Unknown, 0 Unchecked, 47.6s Time] [2021-11-23 03:56:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79741 states. [2021-11-23 03:56:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79741 to 79528. [2021-11-23 03:56:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79528 states, 49011 states have (on average 1.2703066658505233) internal successors, (62259), 49830 states have internal predecessors, (62259), 25266 states have call successors, (25266), 5058 states have call predecessors, (25266), 5250 states have return successors, (26654), 25293 states have call predecessors, (26654), 25265 states have call successors, (26654) [2021-11-23 03:56:11,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79528 states to 79528 states and 114179 transitions. [2021-11-23 03:56:11,526 INFO L78 Accepts]: Start accepts. Automaton has 79528 states and 114179 transitions. Word has length 669 [2021-11-23 03:56:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:11,527 INFO L470 AbstractCegarLoop]: Abstraction has 79528 states and 114179 transitions. [2021-11-23 03:56:11,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 39.0) internal successors, (234), 5 states have internal predecessors, (234), 3 states have call successors, (103), 3 states have call predecessors, (103), 3 states have return successors, (102), 3 states have call predecessors, (102), 2 states have call successors, (102) [2021-11-23 03:56:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 79528 states and 114179 transitions. [2021-11-23 03:56:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2021-11-23 03:56:11,891 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:11,891 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 16, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:11,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:56:12,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:56:12,093 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:12,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:12,093 INFO L85 PathProgramCache]: Analyzing trace with hash -777771664, now seen corresponding path program 1 times [2021-11-23 03:56:12,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:12,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514976906] [2021-11-23 03:56:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:12,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2021-11-23 03:56:12,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:12,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514976906] [2021-11-23 03:56:12,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514976906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:56:12,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639016367] [2021-11-23 03:56:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:12,969 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:56:12,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:56:12,970 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:56:12,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:56:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:15,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 8824 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:56:15,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 380 proven. 0 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2021-11-23 03:56:16,764 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:56:16,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639016367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:16,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:56:16,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 03:56:16,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090681392] [2021-11-23 03:56:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:16,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:56:16,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:56:16,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:56:16,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:56:16,766 INFO L87 Difference]: Start difference. First operand 79528 states and 114179 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 3 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2021-11-23 03:56:19,955 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:22,882 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:24,997 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:29,099 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:56:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:30,829 INFO L93 Difference]: Finished difference Result 158091 states and 226973 transitions. [2021-11-23 03:56:30,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:56:30,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 3 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) Word has length 678 [2021-11-23 03:56:30,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:31,158 INFO L225 Difference]: With dead ends: 158091 [2021-11-23 03:56:31,158 INFO L226 Difference]: Without dead ends: 77592 [2021-11-23 03:56:31,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:56:31,592 INFO L933 BasicCegarLoop]: 2983 mSDtfsCounter, 2410 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2420 SdHoareTripleChecker+Valid, 3583 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:31,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2420 Valid, 3583 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 412 Invalid, 3 Unknown, 0 Unchecked, 11.5s Time] [2021-11-23 03:56:31,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77592 states. [2021-11-23 03:56:35,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77592 to 77305. [2021-11-23 03:56:35,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77305 states, 47630 states have (on average 1.2671845475540626) internal successors, (60356), 48434 states have internal predecessors, (60356), 24634 states have call successors, (24634), 4847 states have call predecessors, (24634), 5040 states have return successors, (25913), 24677 states have call predecessors, (25913), 24633 states have call successors, (25913) [2021-11-23 03:56:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77305 states to 77305 states and 110903 transitions. [2021-11-23 03:56:35,710 INFO L78 Accepts]: Start accepts. Automaton has 77305 states and 110903 transitions. Word has length 678 [2021-11-23 03:56:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:35,711 INFO L470 AbstractCegarLoop]: Abstraction has 77305 states and 110903 transitions. [2021-11-23 03:56:35,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 3 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2021-11-23 03:56:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 77305 states and 110903 transitions. [2021-11-23 03:56:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 693 [2021-11-23 03:56:35,864 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:35,864 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:56:35,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:56:36,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 03:56:36,065 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:56:36,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:36,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1097172444, now seen corresponding path program 1 times [2021-11-23 03:56:36,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:56:36,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347089597] [2021-11-23 03:56:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:36,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:56:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 1432 trivial. 0 not checked. [2021-11-23 03:56:37,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:56:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347089597] [2021-11-23 03:56:37,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347089597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:56:37,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755559427] [2021-11-23 03:56:37,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:37,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:56:37,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:56:37,592 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:56:37,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f190bb8b-2241-4426-9330-693379db59dc/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:56:40,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:40,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 8855 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:56:40,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 394 proven. 52 refuted. 0 times theorem prover too weak. 1009 trivial. 0 not checked. [2021-11-23 03:56:42,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:56:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1455 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1434 trivial. 0 not checked. [2021-11-23 03:56:44,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755559427] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:56:44,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [57234699] [2021-11-23 03:56:44,248 INFO L159 IcfgInterpreter]: Started Sifa with 367 locations of interest [2021-11-23 03:56:44,248 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:56:44,254 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:56:44,265 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:56:44,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:56:51,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 33 select indices, 33 select index equivalence classes, 561 disjoint index pairs (out of 528 index pairs), introduced 33 new quantified variables, introduced 0 case distinctions, treesize of input 6567 treesize of output 5243 [2021-11-23 03:56:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:56,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:56:59,227 INFO L244 Elim1Store]: Index analysis took 4247 ms