./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.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_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/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_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/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_314d8a8f-6367-40be-97b4-4b0e1d69361a/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 bda3098802797ffc08e15000ad078a436cf195bb22a40ea321a7ea1bbc073e29 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:38:52,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:38:52,979 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:38:53,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:38:53,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:38:53,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:38:53,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:38:53,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:38:53,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:38:53,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:38:53,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:38:53,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:38:53,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:38:53,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:38:53,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:38:53,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:38:53,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:38:53,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:38:53,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:38:53,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:38:53,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:38:53,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:38:53,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:38:53,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:38:53,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:38:53,102 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:38:53,102 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:38:53,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:38:53,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:38:53,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:38:53,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:38:53,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:38:53,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:38:53,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:38:53,114 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:38:53,114 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:38:53,115 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:38:53,116 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:38:53,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:38:53,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:38:53,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:38:53,119 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:38:53,165 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:38:53,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:38:53,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:38:53,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:38:53,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:38:53,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:38:53,169 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:38:53,169 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:38:53,169 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:38:53,170 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:38:53,171 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:38:53,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:38:53,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:38:53,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:38:53,172 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:38:53,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:38:53,172 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:38:53,173 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:38:53,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:38:53,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:38:53,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:38:53,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:38:53,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:38:53,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:38:53,175 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:38:53,175 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:38:53,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:38:53,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:38:53,178 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:38:53,178 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:38:53,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:38:53,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:38:53,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:38:53,179 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:38:53,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:38:53,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:38:53,180 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:38:53,180 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:38:53,181 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_314d8a8f-6367-40be-97b4-4b0e1d69361a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bda3098802797ffc08e15000ad078a436cf195bb22a40ea321a7ea1bbc073e29 [2021-11-23 03:38:53,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:38:53,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:38:53,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:38:53,489 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:38:53,490 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:38:53,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i [2021-11-23 03:38:53,567 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/data/450fe1c7e/dd927e9025c5431c9bdef0973407155b/FLAGecd24be21 [2021-11-23 03:38:54,593 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:38:54,594 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i [2021-11-23 03:38:54,640 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/data/450fe1c7e/dd927e9025c5431c9bdef0973407155b/FLAGecd24be21 [2021-11-23 03:38:54,952 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/data/450fe1c7e/dd927e9025c5431c9bdef0973407155b [2021-11-23 03:38:54,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:38:54,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:38:54,958 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:38:54,958 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:38:54,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:38:54,962 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:38:54" (1/1) ... [2021-11-23 03:38:54,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ff649c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:54, skipping insertion in model container [2021-11-23 03:38:54,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:38:54" (1/1) ... [2021-11-23 03:38:54,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:38:55,117 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:38:57,499 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_314d8a8f-6367-40be-97b4-4b0e1d69361a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i[353122,353135] [2021-11-23 03:38:57,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:38:57,626 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:38:58,229 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_314d8a8f-6367-40be-97b4-4b0e1d69361a/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i[353122,353135] [2021-11-23 03:38:58,249 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:38:58,358 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:38:58,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58 WrapperNode [2021-11-23 03:38:58,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:38:58,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:38:58,360 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:38:58,360 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:38:58,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:58,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:58,811 INFO L137 Inliner]: procedures = 247, calls = 4073, calls flagged for inlining = 104, calls inlined = 99, statements flattened = 9462 [2021-11-23 03:38:58,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:38:58,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:38:58,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:38:58,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:38:58,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:58,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:58,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:58,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:59,164 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:59,211 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:59,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:59,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:38:59,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:38:59,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:38:59,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:38:59,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (1/1) ... [2021-11-23 03:38:59,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:38:59,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:38:59,339 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:38:59,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:38:59,388 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-23 03:38:59,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-23 03:38:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure osst_log_options [2021-11-23 03:38:59,389 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_log_options [2021-11-23 03:38:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-23 03:38:59,389 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-23 03:38:59,389 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 03:38:59,389 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 03:38:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-23 03:38:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:38:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:38:59,390 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-23 03:38:59,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-23 03:38:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-23 03:38:59,391 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-23 03:38:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_behind_check [2021-11-23 03:38:59,391 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_behind_check [2021-11-23 03:38:59,391 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-23 03:38:59,391 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-23 03:38:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-11-23 03:38:59,392 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-11-23 03:38:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-23 03:38:59,392 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-23 03:38:59,392 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2021-11-23 03:38:59,392 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2021-11-23 03:38:59,393 INFO L130 BoogieDeclarations]: Found specification of procedure osst_release_request [2021-11-23 03:38:59,393 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_release_request [2021-11-23 03:38:59,393 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:38:59,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:38:59,393 INFO L130 BoogieDeclarations]: Found specification of procedure osst_set_frame_position [2021-11-23 03:38:59,394 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_set_frame_position [2021-11-23 03:38:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_header [2021-11-23 03:38:59,394 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_header [2021-11-23 03:38:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible_nested [2021-11-23 03:38:59,394 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible_nested [2021-11-23 03:38:59,394 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:38:59,395 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:38:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:38:59,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:38:59,395 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-23 03:38:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-23 03:38:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure osst_read_frame [2021-11-23 03:38:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_read_frame [2021-11-23 03:38:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-11-23 03:38:59,396 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-11-23 03:38:59,396 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_device_put [2021-11-23 03:38:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_device_put [2021-11-23 03:38:59,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 03:38:59,397 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 03:38:59,398 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-23 03:38:59,399 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-23 03:38:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_write_buffer [2021-11-23 03:38:59,399 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_write_buffer [2021-11-23 03:38:59,399 INFO L130 BoogieDeclarations]: Found specification of procedure osst_initiate_read [2021-11-23 03:38:59,400 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_initiate_read [2021-11-23 03:38:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure osst_seek_logical_blk [2021-11-23 03:38:59,400 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_seek_logical_blk [2021-11-23 03:38:59,400 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_trailer [2021-11-23 03:38:59,400 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_trailer [2021-11-23 03:38:59,401 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_drive_buffer [2021-11-23 03:38:59,402 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_drive_buffer [2021-11-23 03:38:59,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:38:59,402 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-23 03:38:59,402 INFO L130 BoogieDeclarations]: Found specification of procedure osst_int_ioctl [2021-11-23 03:38:59,402 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_int_ioctl [2021-11-23 03:38:59,402 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-23 03:38:59,403 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-23 03:38:59,403 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-11-23 03:38:59,403 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-11-23 03:38:59,403 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:38:59,403 INFO L130 BoogieDeclarations]: Found specification of procedure osst_copy_to_buffer [2021-11-23 03:38:59,403 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_copy_to_buffer [2021-11-23 03:38:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure __osst_analyze_headers [2021-11-23 03:38:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __osst_analyze_headers [2021-11-23 03:38:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-23 03:38:59,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-23 03:38:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-23 03:38:59,405 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-23 03:38:59,405 INFO L130 BoogieDeclarations]: Found specification of procedure osst_get_logical_frame [2021-11-23 03:38:59,406 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_get_logical_frame [2021-11-23 03:38:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-11-23 03:38:59,406 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-11-23 03:38:59,406 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:38:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure osst_position_tape_and_confirm [2021-11-23 03:38:59,407 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_position_tape_and_confirm [2021-11-23 03:38:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:38:59,407 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-23 03:38:59,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-23 03:38:59,408 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 03:38:59,409 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 03:38:59,409 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 03:38:59,409 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 03:38:59,410 INFO L130 BoogieDeclarations]: Found specification of procedure osst_verify_frame [2021-11-23 03:38:59,411 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_verify_frame [2021-11-23 03:38:59,411 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-23 03:38:59,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-23 03:38:59,411 INFO L130 BoogieDeclarations]: Found specification of procedure osst_wait_ready [2021-11-23 03:38:59,411 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_wait_ready [2021-11-23 03:38:59,411 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-23 03:38:59,412 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-23 03:38:59,412 INFO L130 BoogieDeclarations]: Found specification of procedure osst_reset_header [2021-11-23 03:38:59,412 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_reset_header [2021-11-23 03:38:59,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:38:59,412 INFO L130 BoogieDeclarations]: Found specification of procedure osst_do_scsi [2021-11-23 03:38:59,412 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_do_scsi [2021-11-23 03:38:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-23 03:38:59,413 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-23 03:38:59,413 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2021-11-23 03:38:59,413 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2021-11-23 03:38:59,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:38:59,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:38:59,415 INFO L130 BoogieDeclarations]: Found specification of procedure osst_chk_result [2021-11-23 03:38:59,418 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_chk_result [2021-11-23 03:38:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_add [2021-11-23 03:38:59,418 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_add [2021-11-23 03:38:59,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-23 03:38:59,419 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-23 03:38:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure osst_space_over_filemarks_backward [2021-11-23 03:38:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_space_over_filemarks_backward [2021-11-23 03:38:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure osst_read_back_buffer_and_rewrite [2021-11-23 03:38:59,422 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_read_back_buffer_and_rewrite [2021-11-23 03:38:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-11-23 03:38:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-11-23 03:38:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_cleanup [2021-11-23 03:38:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_cleanup [2021-11-23 03:38:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:38:59,428 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:38:59,429 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_buffer [2021-11-23 03:38:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_buffer [2021-11-23 03:38:59,429 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-23 03:38:59,429 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-23 03:38:59,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:38:59,429 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 03:38:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 03:38:59,430 INFO L130 BoogieDeclarations]: Found specification of procedure osst_reposition_and_retry [2021-11-23 03:38:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_reposition_and_retry [2021-11-23 03:38:59,430 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_filemark [2021-11-23 03:38:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_filemark [2021-11-23 03:38:59,430 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_destroy [2021-11-23 03:38:59,430 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_destroy [2021-11-23 03:38:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:38:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:38:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-23 03:38:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-23 03:38:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2021-11-23 03:38:59,431 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2021-11-23 03:38:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:38:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2021-11-23 03:38:59,432 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2021-11-23 03:38:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-23 03:38:59,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-23 03:38:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2021-11-23 03:38:59,432 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2021-11-23 03:38:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-23 03:38:59,433 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-23 03:38:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:38:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure __osst_write_header [2021-11-23 03:38:59,433 INFO L138 BoogieDeclarations]: Found implementation of procedure __osst_write_header [2021-11-23 03:38:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write [2021-11-23 03:38:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write [2021-11-23 03:38:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_frame [2021-11-23 03:38:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_frame [2021-11-23 03:38:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-23 03:38:59,434 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-23 03:38:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:38:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 03:38:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure osst_get_frame_position [2021-11-23 03:38:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_get_frame_position [2021-11-23 03:38:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure os_scsi_tape_flush [2021-11-23 03:38:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure os_scsi_tape_flush [2021-11-23 03:38:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_buffer [2021-11-23 03:38:59,435 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_buffer [2021-11-23 03:38:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure osst_copy_from_buffer [2021-11-23 03:38:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_copy_from_buffer [2021-11-23 03:38:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-23 03:38:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-23 03:38:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-11-23 03:38:59,436 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-11-23 03:38:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-11-23 03:38:59,437 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-11-23 03:38:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure osst_init_aux [2021-11-23 03:38:59,437 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_init_aux [2021-11-23 03:38:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_error_recovery [2021-11-23 03:38:59,437 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_error_recovery [2021-11-23 03:38:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_eod [2021-11-23 03:38:59,438 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_eod [2021-11-23 03:38:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-23 03:38:59,438 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-23 03:38:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure osst_space_over_filemarks_forward_slow [2021-11-23 03:38:59,438 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_space_over_filemarks_forward_slow [2021-11-23 03:38:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-23 03:38:59,438 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-23 03:38:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_page [2021-11-23 03:38:59,439 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_page [2021-11-23 03:38:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_6 [2021-11-23 03:38:59,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_6 [2021-11-23 03:38:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:38:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure osst_recover_wait_frame [2021-11-23 03:38:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_recover_wait_frame [2021-11-23 03:38:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure osst_wait_frame [2021-11-23 03:38:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_wait_frame [2021-11-23 03:38:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:38:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:38:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-23 03:38:59,440 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-23 03:39:00,797 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:39:00,803 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:39:00,952 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-23 03:39:20,568 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:39:24,990 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:39:24,990 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:39:24,999 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:24 BoogieIcfgContainer [2021-11-23 03:39:24,999 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:39:25,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:39:25,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:39:25,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:39:25,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:38:54" (1/3) ... [2021-11-23 03:39:25,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efca9c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:39:25, skipping insertion in model container [2021-11-23 03:39:25,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:38:58" (2/3) ... [2021-11-23 03:39:25,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2efca9c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:39:25, skipping insertion in model container [2021-11-23 03:39:25,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:24" (3/3) ... [2021-11-23 03:39:25,008 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--scsi--osst.ko-entry_point.cil.out.i [2021-11-23 03:39:25,014 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:39:25,015 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:39:25,092 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:39:25,105 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 03:39:25,106 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:39:25,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 2214 states, 1504 states have (on average 1.408909574468085) internal successors, (2119), 1534 states have internal predecessors, (2119), 616 states have call successors, (616), 93 states have call predecessors, (616), 92 states have return successors, (605), 602 states have call predecessors, (605), 605 states have call successors, (605) [2021-11-23 03:39:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-11-23 03:39:25,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:25,239 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:25,240 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:25,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:25,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1129522539, now seen corresponding path program 1 times [2021-11-23 03:39:25,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:25,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590844540] [2021-11-23 03:39:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:25,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3196 trivial. 0 not checked. [2021-11-23 03:39:26,270 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:26,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590844540] [2021-11-23 03:39:26,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590844540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:26,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:26,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:39:26,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346503305] [2021-11-23 03:39:26,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:26,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:26,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:26,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:26,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:26,318 INFO L87 Difference]: Start difference. First operand has 2214 states, 1504 states have (on average 1.408909574468085) internal successors, (2119), 1534 states have internal predecessors, (2119), 616 states have call successors, (616), 93 states have call predecessors, (616), 92 states have return successors, (605), 602 states have call predecessors, (605), 605 states have call successors, (605) Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 03:39:28,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:31,460 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:39:33,586 WARN L534 Checker$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 03:39:36,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:38,552 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:39:42,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:45,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:45,288 INFO L93 Difference]: Finished difference Result 6382 states and 9732 transitions. [2021-11-23 03:39:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 401 [2021-11-23 03:39:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:45,365 INFO L225 Difference]: With dead ends: 6382 [2021-11-23 03:39:45,365 INFO L226 Difference]: Without dead ends: 4203 [2021-11-23 03:39:45,393 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 03:39:45,396 INFO L933 BasicCegarLoop]: 3515 mSDtfsCounter, 3071 mSDsluCounter, 3287 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3071 SdHoareTripleChecker+Valid, 6454 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:45,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3071 Valid, 6454 Invalid, 728 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3 Valid, 721 Invalid, 4 Unknown, 0 Unchecked, 18.5s Time] [2021-11-23 03:39:45,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-11-23 03:39:45,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 4203. [2021-11-23 03:39:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4203 states, 2887 states have (on average 1.4021475580187046) internal successors, (4048), 2915 states have internal predecessors, (4048), 1136 states have call successors, (1136), 180 states have call predecessors, (1136), 179 states have return successors, (1135), 1130 states have call predecessors, (1135), 1135 states have call successors, (1135) [2021-11-23 03:39:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4203 states to 4203 states and 6319 transitions. [2021-11-23 03:39:45,763 INFO L78 Accepts]: Start accepts. Automaton has 4203 states and 6319 transitions. Word has length 401 [2021-11-23 03:39:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:45,765 INFO L470 AbstractCegarLoop]: Abstraction has 4203 states and 6319 transitions. [2021-11-23 03:39:45,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-23 03:39:45,766 INFO L276 IsEmpty]: Start isEmpty. Operand 4203 states and 6319 transitions. [2021-11-23 03:39:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2021-11-23 03:39:45,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:45,780 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:39:45,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:39:45,781 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:45,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:45,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1788201833, now seen corresponding path program 1 times [2021-11-23 03:39:45,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:45,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554464066] [2021-11-23 03:39:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:45,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:45,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3196 trivial. 0 not checked. [2021-11-23 03:39:46,241 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:46,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554464066] [2021-11-23 03:39:46,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554464066] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:46,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:46,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:39:46,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569180505] [2021-11-23 03:39:46,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:46,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:39:46,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:46,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:39:46,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:39:46,403 INFO L87 Difference]: Start difference. First operand 4203 states and 6319 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2021-11-23 03:39:48,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:52,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:39:54,623 WARN L534 Checker$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 03:39:57,301 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:00,137 WARN L534 Checker$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 03:40:02,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:07,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:11,096 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 03:40:16,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:16,485 INFO L93 Difference]: Finished difference Result 11828 states and 18193 transitions. [2021-11-23 03:40:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:40:16,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) Word has length 410 [2021-11-23 03:40:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:16,574 INFO L225 Difference]: With dead ends: 11828 [2021-11-23 03:40:16,575 INFO L226 Difference]: Without dead ends: 7696 [2021-11-23 03:40:16,615 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 03:40:16,616 INFO L933 BasicCegarLoop]: 4429 mSDtfsCounter, 2288 mSDsluCounter, 8660 mSDsCounter, 0 mSdLazyCounter, 1419 mSolverCounterSat, 327 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2613 SdHoareTripleChecker+Valid, 12193 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1419 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:16,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2613 Valid, 12193 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1419 Invalid, 6 Unknown, 0 Unchecked, 29.6s Time] [2021-11-23 03:40:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7696 states. [2021-11-23 03:40:16,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7696 to 4205. [2021-11-23 03:40:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4205 states, 2889 states have (on average 1.4018691588785046) internal successors, (4050), 2917 states have internal predecessors, (4050), 1136 states have call successors, (1136), 180 states have call predecessors, (1136), 179 states have return successors, (1135), 1130 states have call predecessors, (1135), 1135 states have call successors, (1135) [2021-11-23 03:40:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4205 states to 4205 states and 6321 transitions. [2021-11-23 03:40:16,935 INFO L78 Accepts]: Start accepts. Automaton has 4205 states and 6321 transitions. Word has length 410 [2021-11-23 03:40:16,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:16,937 INFO L470 AbstractCegarLoop]: Abstraction has 4205 states and 6321 transitions. [2021-11-23 03:40:16,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 1 states have call predecessors, (39), 1 states have call successors, (39) [2021-11-23 03:40:16,938 INFO L276 IsEmpty]: Start isEmpty. Operand 4205 states and 6321 transitions. [2021-11-23 03:40:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-23 03:40:16,951 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:16,952 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 03:40:16,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:40:16,952 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:16,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1699580940, now seen corresponding path program 1 times [2021-11-23 03:40:16,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:16,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110150744] [2021-11-23 03:40:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:16,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3196 trivial. 0 not checked. [2021-11-23 03:40:17,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:17,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110150744] [2021-11-23 03:40:17,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110150744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:17,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:17,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:17,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599940779] [2021-11-23 03:40:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:17,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:17,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:17,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:17,424 INFO L87 Difference]: Start difference. First operand 4205 states and 6321 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-23 03:40:19,466 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 03:40:22,212 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:24,332 WARN L534 Checker$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 03:40:29,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:34,078 WARN L534 Checker$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 03:40:36,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:36,655 INFO L93 Difference]: Finished difference Result 8273 states and 12437 transitions. [2021-11-23 03:40:36,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:36,656 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) Word has length 414 [2021-11-23 03:40:36,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:36,748 INFO L225 Difference]: With dead ends: 8273 [2021-11-23 03:40:36,748 INFO L226 Difference]: Without dead ends: 8242 [2021-11-23 03:40:36,759 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 03:40:36,760 INFO L933 BasicCegarLoop]: 3519 mSDtfsCounter, 3103 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 0 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3103 SdHoareTripleChecker+Valid, 6360 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:36,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3103 Valid, 6360 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 715 Invalid, 5 Unknown, 0 Unchecked, 19.0s Time] [2021-11-23 03:40:36,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8242 states. [2021-11-23 03:40:37,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8242 to 8242. [2021-11-23 03:40:37,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8242 states, 5683 states have (on average 1.4045398557100124) internal successors, (7982), 5735 states have internal predecessors, (7982), 2207 states have call successors, (2207), 352 states have call predecessors, (2207), 351 states have return successors, (2206), 2197 states have call predecessors, (2206), 2206 states have call successors, (2206) [2021-11-23 03:40:37,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8242 states to 8242 states and 12395 transitions. [2021-11-23 03:40:37,338 INFO L78 Accepts]: Start accepts. Automaton has 8242 states and 12395 transitions. Word has length 414 [2021-11-23 03:40:37,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:37,341 INFO L470 AbstractCegarLoop]: Abstraction has 8242 states and 12395 transitions. [2021-11-23 03:40:37,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (40), 2 states have call predecessors, (40), 2 states have call successors, (40) [2021-11-23 03:40:37,343 INFO L276 IsEmpty]: Start isEmpty. Operand 8242 states and 12395 transitions. [2021-11-23 03:40:37,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2021-11-23 03:40:37,372 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:37,372 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 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] [2021-11-23 03:40:37,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:40:37,373 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:37,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash 128235041, now seen corresponding path program 1 times [2021-11-23 03:40:37,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:37,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006009048] [2021-11-23 03:40:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:37,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:37,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:37,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1898360740] [2021-11-23 03:40:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:37,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:37,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:37,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:37,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:40:39,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:39,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 4670 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:40:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 3198 trivial. 0 not checked. [2021-11-23 03:40:40,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:40,118 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:40,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006009048] [2021-11-23 03:40:40,118 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:40,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898360740] [2021-11-23 03:40:40,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898360740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:40,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:40,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:40,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285770318] [2021-11-23 03:40:40,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:40,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:40,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:40,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:40,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:40,121 INFO L87 Difference]: Start difference. First operand 8242 states and 12395 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-23 03:40:42,162 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:44,483 WARN L534 Checker$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 03:40:48,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:51,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:52,630 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:55,555 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:40:58,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:58,336 INFO L93 Difference]: Finished difference Result 17327 states and 25998 transitions. [2021-11-23 03:40:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) Word has length 463 [2021-11-23 03:40:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:58,421 INFO L225 Difference]: With dead ends: 17327 [2021-11-23 03:40:58,422 INFO L226 Difference]: Without dead ends: 9156 [2021-11-23 03:40:58,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 461 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 03:40:58,489 INFO L933 BasicCegarLoop]: 2987 mSDtfsCounter, 356 mSDsluCounter, 3236 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 11 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 5876 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:58,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 5876 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 746 Invalid, 4 Unknown, 0 Unchecked, 18.0s Time] [2021-11-23 03:40:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9156 states. [2021-11-23 03:40:58,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9156 to 9142. [2021-11-23 03:40:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9142 states, 6353 states have (on average 1.4059499449079176) internal successors, (8932), 6407 states have internal predecessors, (8932), 2365 states have call successors, (2365), 424 states have call predecessors, (2365), 423 states have return successors, (2364), 2355 states have call predecessors, (2364), 2364 states have call successors, (2364) [2021-11-23 03:40:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9142 states to 9142 states and 13661 transitions. [2021-11-23 03:40:58,953 INFO L78 Accepts]: Start accepts. Automaton has 9142 states and 13661 transitions. Word has length 463 [2021-11-23 03:40:58,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:58,954 INFO L470 AbstractCegarLoop]: Abstraction has 9142 states and 13661 transitions. [2021-11-23 03:40:58,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 2 states have call successors, (49), 2 states have call predecessors, (49), 2 states have return successors, (48), 2 states have call predecessors, (48), 2 states have call successors, (48) [2021-11-23 03:40:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 9142 states and 13661 transitions. [2021-11-23 03:40:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2021-11-23 03:40:58,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:58,970 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 8, 8, 8, 8, 8, 8, 3, 3, 3, 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] [2021-11-23 03:40:59,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:59,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:59,198 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:59,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:59,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1645962510, now seen corresponding path program 1 times [2021-11-23 03:40:59,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:59,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776972388] [2021-11-23 03:40:59,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:59,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:59,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3221 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3216 trivial. 0 not checked. [2021-11-23 03:40:59,660 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:59,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776972388] [2021-11-23 03:40:59,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776972388] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:59,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:59,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:59,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73894275] [2021-11-23 03:40:59,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:59,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:59,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:59,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:59,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:59,664 INFO L87 Difference]: Start difference. First operand 9142 states and 13661 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-23 03:41:01,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:04,666 WARN L534 Checker$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 03:41:07,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:11,331 WARN L534 Checker$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 03:41:14,339 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:16,609 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:20,154 INFO L93 Difference]: Finished difference Result 26461 states and 39595 transitions. [2021-11-23 03:41:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:41:20,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 494 [2021-11-23 03:41:20,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:20,280 INFO L225 Difference]: With dead ends: 26461 [2021-11-23 03:41:20,281 INFO L226 Difference]: Without dead ends: 17390 [2021-11-23 03:41:20,342 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 03:41:20,344 INFO L933 BasicCegarLoop]: 3790 mSDtfsCounter, 2995 mSDsluCounter, 3288 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 1 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2995 SdHoareTripleChecker+Valid, 6724 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:20,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2995 Valid, 6724 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 774 Invalid, 5 Unknown, 0 Unchecked, 20.1s Time] [2021-11-23 03:41:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17390 states. [2021-11-23 03:41:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17390 to 17384. [2021-11-23 03:41:21,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17384 states, 12135 states have (on average 1.4083230325504739) internal successors, (17090), 12229 states have internal predecessors, (17090), 4468 states have call successors, (4468), 781 states have call predecessors, (4468), 780 states have return successors, (4467), 4453 states have call predecessors, (4467), 4467 states have call successors, (4467) [2021-11-23 03:41:21,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17384 states to 17384 states and 26025 transitions. [2021-11-23 03:41:21,324 INFO L78 Accepts]: Start accepts. Automaton has 17384 states and 26025 transitions. Word has length 494 [2021-11-23 03:41:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:21,326 INFO L470 AbstractCegarLoop]: Abstraction has 17384 states and 26025 transitions. [2021-11-23 03:41:21,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 2 states have call successors, (54), 2 states have call predecessors, (54), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-23 03:41:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 17384 states and 26025 transitions. [2021-11-23 03:41:21,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 525 [2021-11-23 03:41:21,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:21,380 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:41:21,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:41:21,380 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:21,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:21,381 INFO L85 PathProgramCache]: Analyzing trace with hash 308077585, now seen corresponding path program 1 times [2021-11-23 03:41:21,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:21,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128127328] [2021-11-23 03:41:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:21,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:21,560 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:41:21,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [764311219] [2021-11-23 03:41:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:21,561 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:41:21,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:41:21,562 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:41:21,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:41:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:23,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 5098 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:41:23,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:41:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3734 backedges. 500 proven. 0 refuted. 0 times theorem prover too weak. 3234 trivial. 0 not checked. [2021-11-23 03:41:24,151 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:41:24,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:24,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128127328] [2021-11-23 03:41:24,152 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:41:24,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764311219] [2021-11-23 03:41:24,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764311219] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:24,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:24,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:41:24,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595314952] [2021-11-23 03:41:24,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:24,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:24,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:24,156 INFO L87 Difference]: Start difference. First operand 17384 states and 26025 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-23 03:41:26,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:28,861 WARN L534 Checker$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 03:41:32,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:35,270 WARN L534 Checker$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 03:41:37,867 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:42,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:41:42,308 INFO L93 Difference]: Finished difference Result 34330 states and 51461 transitions. [2021-11-23 03:41:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:41:42,309 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) Word has length 524 [2021-11-23 03:41:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:41:42,573 INFO L225 Difference]: With dead ends: 34330 [2021-11-23 03:41:42,574 INFO L226 Difference]: Without dead ends: 34226 [2021-11-23 03:41:42,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 522 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 03:41:42,611 INFO L933 BasicCegarLoop]: 3581 mSDtfsCounter, 2944 mSDsluCounter, 3251 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2944 SdHoareTripleChecker+Valid, 6486 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:41:42,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2944 Valid, 6486 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 739 Invalid, 5 Unknown, 0 Unchecked, 17.4s Time] [2021-11-23 03:41:42,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34226 states. [2021-11-23 03:41:44,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34226 to 33956. [2021-11-23 03:41:44,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33956 states, 23703 states have (on average 1.4094840315571868) internal successors, (33409), 23877 states have internal predecessors, (33409), 8759 states have call successors, (8759), 1494 states have call predecessors, (8759), 1493 states have return successors, (8758), 8736 states have call predecessors, (8758), 8758 states have call successors, (8758) [2021-11-23 03:41:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33956 states to 33956 states and 50926 transitions. [2021-11-23 03:41:44,457 INFO L78 Accepts]: Start accepts. Automaton has 33956 states and 50926 transitions. Word has length 524 [2021-11-23 03:41:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:41:44,458 INFO L470 AbstractCegarLoop]: Abstraction has 33956 states and 50926 transitions. [2021-11-23 03:41:44,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (56), 3 states have call predecessors, (56), 3 states have return successors, (55), 3 states have call predecessors, (55), 3 states have call successors, (55) [2021-11-23 03:41:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 33956 states and 50926 transitions. [2021-11-23 03:41:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2021-11-23 03:41:44,542 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:41:44,542 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 03:41:44,590 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:41:44,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:41:44,762 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:41:44,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:41:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1147111769, now seen corresponding path program 1 times [2021-11-23 03:41:44,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:41:44,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673899725] [2021-11-23 03:41:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:44,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:41:45,315 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:41:45,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023398543] [2021-11-23 03:41:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:41:45,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:41:45,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:41:45,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:41:45,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:41:47,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:41:47,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 5181 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:41:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:41:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4004 backedges. 776 proven. 0 refuted. 0 times theorem prover too weak. 3228 trivial. 0 not checked. [2021-11-23 03:41:47,869 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:41:47,869 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:41:47,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673899725] [2021-11-23 03:41:47,870 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:41:47,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023398543] [2021-11-23 03:41:47,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023398543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:41:47,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:41:47,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:41:47,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398754762] [2021-11-23 03:41:47,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:41:47,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:41:47,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:41:47,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:41:47,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:41:47,872 INFO L87 Difference]: Start difference. First operand 33956 states and 50926 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-23 03:41:49,902 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 03:41:52,626 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:41:56,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:41:59,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:00,615 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:04,374 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:42:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:06,757 INFO L93 Difference]: Finished difference Result 87352 states and 130006 transitions. [2021-11-23 03:42:06,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:42:06,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) Word has length 536 [2021-11-23 03:42:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:07,111 INFO L225 Difference]: With dead ends: 87352 [2021-11-23 03:42:07,111 INFO L226 Difference]: Without dead ends: 53467 [2021-11-23 03:42:07,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 534 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 03:42:07,399 INFO L933 BasicCegarLoop]: 3284 mSDtfsCounter, 2362 mSDsluCounter, 2714 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 16 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2362 SdHoareTripleChecker+Valid, 5703 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:07,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2362 Valid, 5703 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 693 Invalid, 4 Unknown, 0 Unchecked, 17.4s Time] [2021-11-23 03:42:07,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53467 states. [2021-11-23 03:42:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53467 to 53444. [2021-11-23 03:42:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53444 states, 37093 states have (on average 1.3943062033267732) internal successors, (51719), 37387 states have internal predecessors, (51719), 13681 states have call successors, (13681), 2670 states have call predecessors, (13681), 2669 states have return successors, (13680), 13642 states have call predecessors, (13680), 13680 states have call successors, (13680) [2021-11-23 03:42:10,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53444 states to 53444 states and 79080 transitions. [2021-11-23 03:42:10,363 INFO L78 Accepts]: Start accepts. Automaton has 53444 states and 79080 transitions. Word has length 536 [2021-11-23 03:42:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:10,365 INFO L470 AbstractCegarLoop]: Abstraction has 53444 states and 79080 transitions. [2021-11-23 03:42:10,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 3 states have call successors, (57), 3 states have call predecessors, (57), 3 states have return successors, (56), 3 states have call predecessors, (56), 3 states have call successors, (56) [2021-11-23 03:42:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 53444 states and 79080 transitions. [2021-11-23 03:42:10,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2021-11-23 03:42:10,431 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:10,431 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-23 03:42:10,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:42:10,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:42:10,649 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:42:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1215140029, now seen corresponding path program 1 times [2021-11-23 03:42:10,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:42:10,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884338226] [2021-11-23 03:42:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:10,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:42:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:11,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3508 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3491 trivial. 0 not checked. [2021-11-23 03:42:11,282 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:42:11,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884338226] [2021-11-23 03:42:11,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884338226] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:42:11,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:42:11,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:42:11,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615796488] [2021-11-23 03:42:11,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:42:11,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:42:11,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:11,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:42:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:42:11,286 INFO L87 Difference]: Start difference. First operand 53444 states and 79080 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-23 03:42:13,330 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 03:42:18,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:22,880 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:42:28,022 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:31,414 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:36,089 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:42:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:42:42,574 INFO L93 Difference]: Finished difference Result 141211 states and 213389 transitions. [2021-11-23 03:42:42,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:42:42,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 544 [2021-11-23 03:42:42,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:42:43,366 INFO L225 Difference]: With dead ends: 141211 [2021-11-23 03:42:43,366 INFO L226 Difference]: Without dead ends: 87838 [2021-11-23 03:42:43,695 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 03:42:43,696 INFO L933 BasicCegarLoop]: 4580 mSDtfsCounter, 1980 mSDsluCounter, 8620 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 317 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2295 SdHoareTripleChecker+Valid, 12317 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:42:43,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2295 Valid, 12317 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1418 Invalid, 5 Unknown, 0 Unchecked, 28.9s Time] [2021-11-23 03:42:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87838 states. [2021-11-23 03:42:46,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87838 to 53492. [2021-11-23 03:42:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53492 states, 37141 states have (on average 1.3937966129075685) internal successors, (51767), 37435 states have internal predecessors, (51767), 13681 states have call successors, (13681), 2670 states have call predecessors, (13681), 2669 states have return successors, (13680), 13642 states have call predecessors, (13680), 13680 states have call successors, (13680) [2021-11-23 03:42:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53492 states to 53492 states and 79128 transitions. [2021-11-23 03:42:47,286 INFO L78 Accepts]: Start accepts. Automaton has 53492 states and 79128 transitions. Word has length 544 [2021-11-23 03:42:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:42:47,287 INFO L470 AbstractCegarLoop]: Abstraction has 53492 states and 79128 transitions. [2021-11-23 03:42:47,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-23 03:42:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 53492 states and 79128 transitions. [2021-11-23 03:42:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-11-23 03:42:47,338 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:42:47,339 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-23 03:42:47,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:42:47,339 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:42:47,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:42:47,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1111672292, now seen corresponding path program 1 times [2021-11-23 03:42:47,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:42:47,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834238251] [2021-11-23 03:42:47,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:42:47,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:42:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:42:47,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3508 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 3491 trivial. 0 not checked. [2021-11-23 03:42:47,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:42:47,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834238251] [2021-11-23 03:42:47,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834238251] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:42:47,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:42:47,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:42:47,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347346248] [2021-11-23 03:42:47,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:42:47,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:42:47,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:42:47,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:42:47,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:42:47,995 INFO L87 Difference]: Start difference. First operand 53492 states and 79128 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-23 03:42:50,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:53,028 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:42:56,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:42:58,123 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:00,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:04,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:43:07,075 WARN L534 Checker$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 03:43:09,119 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 03:43:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:43:12,237 INFO L93 Difference]: Finished difference Result 92064 states and 137702 transitions. [2021-11-23 03:43:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:43:12,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 547 [2021-11-23 03:43:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:43:12,751 INFO L225 Difference]: With dead ends: 92064 [2021-11-23 03:43:12,751 INFO L226 Difference]: Without dead ends: 65228 [2021-11-23 03:43:12,902 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 03:43:12,905 INFO L933 BasicCegarLoop]: 3789 mSDtfsCounter, 622 mSDsluCounter, 3445 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 4 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 6887 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:43:12,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 6887 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 810 Invalid, 6 Unknown, 0 Unchecked, 22.5s Time] [2021-11-23 03:43:12,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65228 states. [2021-11-23 03:43:14,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65228 to 53494. [2021-11-23 03:43:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53494 states, 37143 states have (on average 1.393775408556121) internal successors, (51769), 37437 states have internal predecessors, (51769), 13681 states have call successors, (13681), 2670 states have call predecessors, (13681), 2669 states have return successors, (13680), 13642 states have call predecessors, (13680), 13680 states have call successors, (13680) [2021-11-23 03:43:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53494 states to 53494 states and 79130 transitions. [2021-11-23 03:43:15,281 INFO L78 Accepts]: Start accepts. Automaton has 53494 states and 79130 transitions. Word has length 547 [2021-11-23 03:43:15,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:43:15,283 INFO L470 AbstractCegarLoop]: Abstraction has 53494 states and 79130 transitions. [2021-11-23 03:43:15,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 3 states have internal predecessors, (138), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-23 03:43:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 53494 states and 79130 transitions. [2021-11-23 03:43:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-11-23 03:43:15,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:43:15,342 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 4, 4, 4, 3, 3, 3, 3, 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] [2021-11-23 03:43:15,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:43:15,342 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:43:15,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:43:15,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1028997699, now seen corresponding path program 1 times [2021-11-23 03:43:15,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:43:15,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169936578] [2021-11-23 03:43:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:15,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:43:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:43:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 3492 trivial. 0 not checked. [2021-11-23 03:43:16,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:43:16,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169936578] [2021-11-23 03:43:16,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169936578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:43:16,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817615315] [2021-11-23 03:43:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:16,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:43:16,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:43:16,156 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:43:16,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:43:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:43:17,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 5290 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:43:17,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:43:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3510 trivial. 0 not checked. [2021-11-23 03:43:19,501 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:43:19,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817615315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:43:19,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:43:19,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2021-11-23 03:43:19,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424375010] [2021-11-23 03:43:19,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:43:19,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:43:19,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:43:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:43:19,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:43:19,504 INFO L87 Difference]: Start difference. First operand 53494 states and 79130 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2021-11-23 03:43:21,558 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:24,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:27,108 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:43:29,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:32,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:43:37,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:43:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:43:40,547 INFO L93 Difference]: Finished difference Result 80328 states and 118825 transitions. [2021-11-23 03:43:40,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:43:40,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) Word has length 549 [2021-11-23 03:43:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:43:40,953 INFO L225 Difference]: With dead ends: 80328 [2021-11-23 03:43:40,953 INFO L226 Difference]: Without dead ends: 80248 [2021-11-23 03:43:40,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:43:40,990 INFO L933 BasicCegarLoop]: 3512 mSDtfsCounter, 3054 mSDsluCounter, 3195 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 0 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3054 SdHoareTripleChecker+Valid, 6353 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:43:40,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3054 Valid, 6353 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 710 Invalid, 4 Unknown, 0 Unchecked, 19.4s Time] [2021-11-23 03:43:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80248 states. [2021-11-23 03:43:43,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80248 to 80160. [2021-11-23 03:43:43,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80160 states, 55660 states have (on average 1.3937836866690623) internal successors, (77578), 56100 states have internal predecessors, (77578), 20501 states have call successors, (20501), 3999 states have call predecessors, (20501), 3998 states have return successors, (20500), 20443 states have call predecessors, (20500), 20500 states have call successors, (20500) [2021-11-23 03:43:44,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80160 states to 80160 states and 118579 transitions. [2021-11-23 03:43:44,589 INFO L78 Accepts]: Start accepts. Automaton has 80160 states and 118579 transitions. Word has length 549 [2021-11-23 03:43:44,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:43:44,589 INFO L470 AbstractCegarLoop]: Abstraction has 80160 states and 118579 transitions. [2021-11-23 03:43:44,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 2 states have internal predecessors, (129), 2 states have call successors, (58), 2 states have call predecessors, (58), 1 states have return successors, (57), 1 states have call predecessors, (57), 1 states have call successors, (57) [2021-11-23 03:43:44,590 INFO L276 IsEmpty]: Start isEmpty. Operand 80160 states and 118579 transitions. [2021-11-23 03:43:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2021-11-23 03:43:44,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:43:44,705 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 3, 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] [2021-11-23 03:43:44,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-23 03:43:44,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:43:44,918 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:43:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:43:44,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1488770836, now seen corresponding path program 1 times [2021-11-23 03:43:44,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:43:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258335255] [2021-11-23 03:43:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:44,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:43:45,344 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:43:45,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041717755] [2021-11-23 03:43:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:43:45,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:43:45,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:43:45,347 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:43:45,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:43:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:43:47,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 5363 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:43:47,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:43:49,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4039 trivial. 0 not checked. [2021-11-23 03:43:49,256 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:43:49,256 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:43:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258335255] [2021-11-23 03:43:49,256 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:43:49,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041717755] [2021-11-23 03:43:49,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041717755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:43:49,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:43:49,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:43:49,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046496761] [2021-11-23 03:43:49,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:43:49,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:43:49,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:43:49,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:43:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:43:49,260 INFO L87 Difference]: Start difference. First operand 80160 states and 118579 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2021-11-23 03:43:51,299 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 03:43:54,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:43:58,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:44:01,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:44:03,406 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:44:05,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:44:06,814 WARN L534 Checker$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 03:44:08,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:44:13,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:44:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:17,325 INFO L93 Difference]: Finished difference Result 120362 states and 178047 transitions. [2021-11-23 03:44:17,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:44:17,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) Word has length 575 [2021-11-23 03:44:17,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:18,207 INFO L225 Difference]: With dead ends: 120362 [2021-11-23 03:44:18,207 INFO L226 Difference]: Without dead ends: 120282 [2021-11-23 03:44:18,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 573 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 03:44:18,277 INFO L933 BasicCegarLoop]: 3578 mSDtfsCounter, 2939 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 0 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2939 SdHoareTripleChecker+Valid, 6419 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:18,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2939 Valid, 6419 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 716 Invalid, 7 Unknown, 0 Unchecked, 25.0s Time] [2021-11-23 03:44:18,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120282 states. [2021-11-23 03:44:22,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120282 to 120194. [2021-11-23 03:44:22,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120194 states, 83490 states have (on average 1.3938914840100611) internal successors, (116376), 84132 states have internal predecessors, (116376), 30713 states have call successors, (30713), 5991 states have call predecessors, (30713), 5990 states have return successors, (30712), 30631 states have call predecessors, (30712), 30712 states have call successors, (30712) [2021-11-23 03:44:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120194 states to 120194 states and 177801 transitions. [2021-11-23 03:44:23,955 INFO L78 Accepts]: Start accepts. Automaton has 120194 states and 177801 transitions. Word has length 575 [2021-11-23 03:44:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:23,955 INFO L470 AbstractCegarLoop]: Abstraction has 120194 states and 177801 transitions. [2021-11-23 03:44:23,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (60), 1 states have call predecessors, (60), 1 states have call successors, (60) [2021-11-23 03:44:23,956 INFO L276 IsEmpty]: Start isEmpty. Operand 120194 states and 177801 transitions. [2021-11-23 03:44:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2021-11-23 03:44:24,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:24,670 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 3, 3, 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] [2021-11-23 03:44:24,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 03:44:24,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-23 03:44:24,886 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:24,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1368654665, now seen corresponding path program 1 times [2021-11-23 03:44:24,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:24,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555945462] [2021-11-23 03:44:24,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:24,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:25,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:44:25,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740532125] [2021-11-23 03:44:25,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:25,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:25,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:25,152 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:25,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:44:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:27,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 5675 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:44:27,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3533 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 3257 trivial. 0 not checked. [2021-11-23 03:44:28,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:44:28,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:28,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555945462] [2021-11-23 03:44:28,347 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:44:28,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740532125] [2021-11-23 03:44:28,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740532125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:44:28,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:44:28,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:44:28,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846513004] [2021-11-23 03:44:28,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:44:28,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:44:28,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:28,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:44:28,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:44:28,351 INFO L87 Difference]: Start difference. First operand 120194 states and 177801 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 3 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2021-11-23 03:44:30,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:44:33,423 WARN L534 Checker$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 03:44:37,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:44:41,518 WARN L534 Checker$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 03:44:45,233 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:44:49,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:49,704 INFO L93 Difference]: Finished difference Result 175753 states and 259993 transitions. [2021-11-23 03:44:49,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:44:49,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 3 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) Word has length 611 [2021-11-23 03:44:49,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:50,429 INFO L225 Difference]: With dead ends: 175753 [2021-11-23 03:44:50,429 INFO L226 Difference]: Without dead ends: 122249 [2021-11-23 03:44:50,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 610 GetRequests, 609 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 03:44:50,696 INFO L933 BasicCegarLoop]: 3004 mSDtfsCounter, 316 mSDsluCounter, 3235 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 11 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 5893 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:50,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 5893 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 746 Invalid, 5 Unknown, 0 Unchecked, 17.4s Time] [2021-11-23 03:44:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122249 states. [2021-11-23 03:44:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122249 to 122126. [2021-11-23 03:44:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122126 states, 84991 states have (on average 1.3947123813109623) internal successors, (118538), 85643 states have internal predecessors, (118538), 31019 states have call successors, (31019), 6116 states have call predecessors, (31019), 6115 states have return successors, (31018), 30935 states have call predecessors, (31018), 31018 states have call successors, (31018) [2021-11-23 03:44:56,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122126 states to 122126 states and 180575 transitions. [2021-11-23 03:44:56,393 INFO L78 Accepts]: Start accepts. Automaton has 122126 states and 180575 transitions. Word has length 611 [2021-11-23 03:44:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:56,395 INFO L470 AbstractCegarLoop]: Abstraction has 122126 states and 180575 transitions. [2021-11-23 03:44:56,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 3 states have internal predecessors, (182), 3 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (68), 3 states have call predecessors, (68), 3 states have call successors, (68) [2021-11-23 03:44:56,395 INFO L276 IsEmpty]: Start isEmpty. Operand 122126 states and 180575 transitions. [2021-11-23 03:44:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 635 [2021-11-23 03:44:57,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:57,238 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 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] [2021-11-23 03:44:57,279 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-23 03:44:57,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:57,442 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:44:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash -578829710, now seen corresponding path program 1 times [2021-11-23 03:44:57,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:57,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664778790] [2021-11-23 03:44:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:57,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:57,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:44:57,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [84020366] [2021-11-23 03:44:57,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:57,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:57,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:57,658 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:57,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_314d8a8f-6367-40be-97b4-4b0e1d69361a/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:44:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:59,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 5918 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:44:59,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4061 backedges. 806 proven. 0 refuted. 0 times theorem prover too weak. 3255 trivial. 0 not checked. [2021-11-23 03:45:00,729 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:45:00,730 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664778790] [2021-11-23 03:45:00,730 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:45:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84020366] [2021-11-23 03:45:00,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84020366] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:00,731 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:00,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:45:00,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710351879] [2021-11-23 03:45:00,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:00,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:45:00,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:45:00,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:45:00,734 INFO L87 Difference]: Start difference. First operand 122126 states and 180575 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 3 states have call successors, (71), 3 states have call predecessors, (71), 3 states have return successors, (70), 3 states have call predecessors, (70), 3 states have call successors, (70) [2021-11-23 03:45:02,769 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 03:45:05,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:45:09,367 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:45:12,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:45:14,161 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:45:16,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:45:21,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:45:23,230 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers []