./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF --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 2ecffe8a5f60817da30887d6b361935e398ff8703e4fd5b17747e558625c4088 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:38:00,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:38:00,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:38:01,006 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:38:01,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:38:01,014 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:38:01,016 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:38:01,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:38:01,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:38:01,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:38:01,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:38:01,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:38:01,038 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:38:01,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:38:01,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:38:01,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:38:01,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:38:01,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:38:01,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:38:01,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:38:01,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:38:01,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:38:01,076 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:38:01,077 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:38:01,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:38:01,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:38:01,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:38:01,093 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:38:01,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:38:01,096 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:38:01,096 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:38:01,097 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:38:01,100 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:38:01,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:38:01,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:38:01,104 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:38:01,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:38:01,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:38:01,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:38:01,107 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:38:01,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:38:01,109 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 22:38:01,160 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:38:01,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:38:01,162 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:38:01,162 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:38:01,162 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:38:01,163 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:38:01,163 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:38:01,163 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 22:38:01,170 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:38:01,170 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:38:01,171 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 22:38:01,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 22:38:01,172 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:38:01,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 22:38:01,173 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 22:38:01,173 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 22:38:01,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:38:01,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 22:38:01,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:38:01,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:38:01,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:38:01,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:38:01,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:38:01,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:38:01,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:38:01,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:38:01,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:38:01,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:38:01,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:01,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:38:01,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:38:01,179 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:38:01,180 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 22:38:01,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 22:38:01,180 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:38:01,181 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:38:01,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:38:01,181 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_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ecffe8a5f60817da30887d6b361935e398ff8703e4fd5b17747e558625c4088 [2021-11-12 22:38:01,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:38:01,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:38:01,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:38:01,606 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:38:01,606 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:38:01,608 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:38:01,692 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data/53c5a96a8/a7ecc340851e49139249e3985a3c4b44/FLAGce34576a4 [2021-11-12 22:38:03,020 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:38:03,021 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:38:03,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data/53c5a96a8/a7ecc340851e49139249e3985a3c4b44/FLAGce34576a4 [2021-11-12 22:38:03,263 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data/53c5a96a8/a7ecc340851e49139249e3985a3c4b44 [2021-11-12 22:38:03,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:38:03,267 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:38:03,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:03,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:38:03,273 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:38:03,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:03" (1/1) ... [2021-11-12 22:38:03,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59e1a2ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:03, skipping insertion in model container [2021-11-12 22:38:03,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:03" (1/1) ... [2021-11-12 22:38:03,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:38:03,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:04,746 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,256 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,267 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,288 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,289 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,831 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,852 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,858 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,898 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,899 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,905 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,907 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,908 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,909 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,980 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:05,997 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,051 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,075 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,085 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,091 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,110 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,116 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,172 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,180 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,187 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,195 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,202 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,210 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,236 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,237 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,239 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,249 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-12 22:38:06,309 WARN L228 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_b306436c-746d-44f3-973b-fd2accf9f538/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[331724,331737] [2021-11-12 22:38:06,445 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:06,522 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-12 22:38:06,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1be56d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:06, skipping insertion in model container [2021-11-12 22:38:06,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:06,526 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 22:38:06,529 INFO L158 Benchmark]: Toolchain (without parser) took 3259.82ms. Allocated memory was 121.6MB in the beginning and 182.5MB in the end (delta: 60.8MB). Free memory was 80.6MB in the beginning and 128.5MB in the end (delta: -47.9MB). Peak memory consumption was 72.2MB. Max. memory is 16.1GB. [2021-11-12 22:38:06,529 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 22:38:06,532 INFO L158 Benchmark]: CACSL2BoogieTranslator took 3257.51ms. Allocated memory was 121.6MB in the beginning and 182.5MB in the end (delta: 60.8MB). Free memory was 80.6MB in the beginning and 128.5MB in the end (delta: -47.9MB). Peak memory consumption was 72.2MB. Max. memory is 16.1GB. [2021-11-12 22:38:06,534 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 121.6MB. Free memory is still 79.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 3257.51ms. Allocated memory was 121.6MB in the beginning and 182.5MB in the end (delta: 60.8MB). Free memory was 80.6MB in the beginning and 128.5MB in the end (delta: -47.9MB). Peak memory consumption was 72.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4314]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF --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 2ecffe8a5f60817da30887d6b361935e398ff8703e4fd5b17747e558625c4088 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 22:38:09,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 22:38:09,068 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 22:38:09,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 22:38:09,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 22:38:09,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 22:38:09,150 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 22:38:09,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 22:38:09,159 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 22:38:09,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 22:38:09,171 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 22:38:09,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 22:38:09,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 22:38:09,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 22:38:09,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 22:38:09,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 22:38:09,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 22:38:09,190 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 22:38:09,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 22:38:09,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 22:38:09,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 22:38:09,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 22:38:09,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 22:38:09,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 22:38:09,224 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 22:38:09,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 22:38:09,225 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 22:38:09,227 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 22:38:09,228 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 22:38:09,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 22:38:09,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 22:38:09,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 22:38:09,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 22:38:09,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 22:38:09,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 22:38:09,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 22:38:09,239 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 22:38:09,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 22:38:09,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 22:38:09,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 22:38:09,243 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 22:38:09,249 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 22:38:09,304 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 22:38:09,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 22:38:09,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 22:38:09,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 22:38:09,307 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 22:38:09,307 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 22:38:09,308 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 22:38:09,308 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 22:38:09,308 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 22:38:09,308 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 22:38:09,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 22:38:09,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 22:38:09,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 22:38:09,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 22:38:09,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 22:38:09,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 22:38:09,313 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 22:38:09,313 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 22:38:09,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 22:38:09,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 22:38:09,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 22:38:09,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 22:38:09,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 22:38:09,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 22:38:09,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:09,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 22:38:09,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 22:38:09,316 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 22:38:09,316 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 22:38:09,317 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 22:38:09,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 22:38:09,317 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 22:38:09,317 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 22:38:09,318 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2ecffe8a5f60817da30887d6b361935e398ff8703e4fd5b17747e558625c4088 [2021-11-12 22:38:09,795 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 22:38:09,823 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 22:38:09,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 22:38:09,828 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 22:38:09,829 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 22:38:09,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:38:09,930 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data/0e2a9fe16/9b85f0cfe69c40f8a945ad30dfee2adc/FLAG3f8a66302 [2021-11-12 22:38:11,157 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 22:38:11,158 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:38:11,202 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data/0e2a9fe16/9b85f0cfe69c40f8a945ad30dfee2adc/FLAG3f8a66302 [2021-11-12 22:38:11,450 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/data/0e2a9fe16/9b85f0cfe69c40f8a945ad30dfee2adc [2021-11-12 22:38:11,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 22:38:11,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 22:38:11,460 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:11,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 22:38:11,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 22:38:11,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:11" (1/1) ... [2021-11-12 22:38:11,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3041bdb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:11, skipping insertion in model container [2021-11-12 22:38:11,466 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 10:38:11" (1/1) ... [2021-11-12 22:38:11,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 22:38:11,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:14,483 WARN L228 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_b306436c-746d-44f3-973b-fd2accf9f538/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[331724,331737] [2021-11-12 22:38:14,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:14,661 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 22:38:14,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 22:38:15,318 WARN L228 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_b306436c-746d-44f3-973b-fd2accf9f538/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[331724,331737] [2021-11-12 22:38:15,346 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:15,374 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 22:38:16,124 WARN L228 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_b306436c-746d-44f3-973b-fd2accf9f538/sv-benchmarks/c/ldv-challenges/linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i[331724,331737] [2021-11-12 22:38:16,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 22:38:16,353 INFO L208 MainTranslator]: Completed translation [2021-11-12 22:38:16,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16 WrapperNode [2021-11-12 22:38:16,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 22:38:16,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 22:38:16,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 22:38:16,357 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 22:38:16,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:16,648 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:16,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 22:38:16,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 22:38:16,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 22:38:16,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 22:38:16,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:16,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:17,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:17,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:17,486 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:17,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:17,601 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:17,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 22:38:17,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 22:38:17,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 22:38:17,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 22:38:17,664 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (1/1) ... [2021-11-12 22:38:17,674 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 22:38:17,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 22:38:17,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 22:38:17,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 22:38:17,768 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab32 [2021-11-12 22:38:17,768 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab32 [2021-11-12 22:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure osst_log_options [2021-11-12 22:38:17,769 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_log_options [2021-11-12 22:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 22:38:17,769 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-12 22:38:17,770 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-12 22:38:17,770 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-12 22:38:17,770 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-12 22:38:17,770 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-12 22:38:17,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 22:38:17,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 22:38:17,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 22:38:17,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-12 22:38:17,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 22:38:17,772 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_behind_check [2021-11-12 22:38:17,772 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_behind_check [2021-11-12 22:38:17,772 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-12 22:38:17,772 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-12 22:38:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_block_when_processing_errors [2021-11-12 22:38:17,773 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_block_when_processing_errors [2021-11-12 22:38:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-12 22:38:17,773 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-12 22:38:17,773 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_unlock [2021-11-12 22:38:17,774 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_unlock [2021-11-12 22:38:17,775 INFO L130 BoogieDeclarations]: Found specification of procedure osst_release_request [2021-11-12 22:38:17,775 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_release_request [2021-11-12 22:38:17,775 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 22:38:17,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 22:38:17,776 INFO L130 BoogieDeclarations]: Found specification of procedure osst_set_frame_position [2021-11-12 22:38:17,776 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_set_frame_position [2021-11-12 22:38:17,776 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_header [2021-11-12 22:38:17,776 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_header [2021-11-12 22:38:17,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_osst_tape [2021-11-12 22:38:17,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_osst_tape [2021-11-12 22:38:17,777 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_interruptible_lock_of_osst_tape [2021-11-12 22:38:17,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_interruptible_lock_of_osst_tape [2021-11-12 22:38:17,778 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-12 22:38:17,778 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-12 22:38:17,779 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 22:38:17,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 22:38:17,779 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-12 22:38:17,779 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-12 22:38:17,780 INFO L130 BoogieDeclarations]: Found specification of procedure osst_read_frame [2021-11-12 22:38:17,780 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_read_frame [2021-11-12 22:38:17,780 INFO L130 BoogieDeclarations]: Found specification of procedure tape_name [2021-11-12 22:38:17,780 INFO L138 BoogieDeclarations]: Found implementation of procedure tape_name [2021-11-12 22:38:17,780 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2021-11-12 22:38:17,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2021-11-12 22:38:17,781 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_device_put [2021-11-12 22:38:17,781 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_device_put [2021-11-12 22:38:17,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 22:38:17,783 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 22:38:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_write_buffer [2021-11-12 22:38:17,784 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_write_buffer [2021-11-12 22:38:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure osst_initiate_read [2021-11-12 22:38:17,784 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_initiate_read [2021-11-12 22:38:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-12 22:38:17,785 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-12 22:38:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure scsi_ioctl [2021-11-12 22:38:17,786 INFO L138 BoogieDeclarations]: Found implementation of procedure scsi_ioctl [2021-11-12 22:38:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure osst_seek_logical_blk [2021-11-12 22:38:17,787 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_seek_logical_blk [2021-11-12 22:38:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_osst_int_mutex [2021-11-12 22:38:17,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_osst_int_mutex [2021-11-12 22:38:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_trailer [2021-11-12 22:38:17,788 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_trailer [2021-11-12 22:38:17,788 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_drive_buffer [2021-11-12 22:38:17,788 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_drive_buffer [2021-11-12 22:38:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 22:38:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_osst_int_mutex [2021-11-12 22:38:17,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_osst_int_mutex [2021-11-12 22:38:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-12 22:38:17,789 INFO L130 BoogieDeclarations]: Found specification of procedure osst_int_ioctl [2021-11-12 22:38:17,790 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_int_ioctl [2021-11-12 22:38:17,790 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-12 22:38:17,790 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-12 22:38:17,790 INFO L130 BoogieDeclarations]: Found specification of procedure do_door_lock [2021-11-12 22:38:17,790 INFO L138 BoogieDeclarations]: Found implementation of procedure do_door_lock [2021-11-12 22:38:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 22:38:17,791 INFO L130 BoogieDeclarations]: Found specification of procedure osst_copy_to_buffer [2021-11-12 22:38:17,791 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_copy_to_buffer [2021-11-12 22:38:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure __osst_analyze_headers [2021-11-12 22:38:17,792 INFO L138 BoogieDeclarations]: Found implementation of procedure __osst_analyze_headers [2021-11-12 22:38:17,792 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-12 22:38:17,793 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-12 22:38:17,793 INFO L130 BoogieDeclarations]: Found specification of procedure osst_get_logical_frame [2021-11-12 22:38:17,794 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_get_logical_frame [2021-11-12 22:38:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_interruptible [2021-11-12 22:38:17,794 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_interruptible [2021-11-12 22:38:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure driver_unregister [2021-11-12 22:38:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure driver_unregister [2021-11-12 22:38:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 22:38:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-12 22:38:17,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-12 22:38:17,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 22:38:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 22:38:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure osst_position_tape_and_confirm [2021-11-12 22:38:17,798 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_position_tape_and_confirm [2021-11-12 22:38:17,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 22:38:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-12 22:38:17,799 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-12 22:38:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-12 22:38:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 22:38:17,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-12 22:38:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-12 22:38:17,800 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-12 22:38:17,800 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-12 22:38:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-12 22:38:17,801 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-12 22:38:17,801 INFO L130 BoogieDeclarations]: Found specification of procedure osst_verify_frame [2021-11-12 22:38:17,801 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_verify_frame [2021-11-12 22:38:17,802 INFO L130 BoogieDeclarations]: Found specification of procedure __fswab16 [2021-11-12 22:38:17,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __fswab16 [2021-11-12 22:38:17,806 INFO L130 BoogieDeclarations]: Found specification of procedure osst_wait_ready [2021-11-12 22:38:17,806 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_wait_ready [2021-11-12 22:38:17,807 INFO L130 BoogieDeclarations]: Found specification of procedure osst_reset_header [2021-11-12 22:38:17,807 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_reset_header [2021-11-12 22:38:17,808 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-12 22:38:17,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-12 22:38:17,810 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-12 22:38:17,811 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-12 22:38:17,811 INFO L130 BoogieDeclarations]: Found specification of procedure osst_do_scsi [2021-11-12 22:38:17,817 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_do_scsi [2021-11-12 22:38:17,817 INFO L130 BoogieDeclarations]: Found specification of procedure sg_page [2021-11-12 22:38:17,817 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_page [2021-11-12 22:38:17,817 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev [2021-11-12 22:38:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev [2021-11-12 22:38:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure osst_chk_result [2021-11-12 22:38:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_chk_result [2021-11-12 22:38:17,818 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_add [2021-11-12 22:38:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_add [2021-11-12 22:38:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 22:38:17,819 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 22:38:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure osst_space_over_filemarks_backward [2021-11-12 22:38:17,819 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_space_over_filemarks_backward [2021-11-12 22:38:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure osst_read_back_buffer_and_rewrite [2021-11-12 22:38:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_read_back_buffer_and_rewrite [2021-11-12 22:38:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure cross_eof [2021-11-12 22:38:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure cross_eof [2021-11-12 22:38:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_cleanup [2021-11-12 22:38:17,820 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_cleanup [2021-11-12 22:38:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 22:38:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 22:38:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure append_to_buffer [2021-11-12 22:38:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure append_to_buffer [2021-11-12 22:38:17,821 INFO L130 BoogieDeclarations]: Found specification of procedure vfree [2021-11-12 22:38:17,821 INFO L138 BoogieDeclarations]: Found implementation of procedure vfree [2021-11-12 22:38:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-12 22:38:17,822 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-12 22:38:17,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 22:38:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-12 22:38:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 22:38:17,823 INFO L130 BoogieDeclarations]: Found specification of procedure osst_reposition_and_retry [2021-11-12 22:38:17,824 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_reposition_and_retry [2021-11-12 22:38:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 22:38:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_filemark [2021-11-12 22:38:17,824 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_filemark [2021-11-12 22:38:17,824 INFO L130 BoogieDeclarations]: Found specification of procedure osst_sysfs_destroy [2021-11-12 22:38:17,825 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_sysfs_destroy [2021-11-12 22:38:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-12 22:38:17,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-12 22:38:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure schedule_timeout_interruptible [2021-11-12 22:38:17,825 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule_timeout_interruptible [2021-11-12 22:38:17,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 22:38:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure vmalloc [2021-11-12 22:38:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure vmalloc [2021-11-12 22:38:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_write_lock [2021-11-12 22:38:17,826 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_write_lock [2021-11-12 22:38:17,826 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-12 22:38:17,827 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-12 22:38:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure __osst_write_header [2021-11-12 22:38:17,827 INFO L138 BoogieDeclarations]: Found implementation of procedure __osst_write_header [2021-11-12 22:38:17,827 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_frame [2021-11-12 22:38:17,827 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_frame [2021-11-12 22:38:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-12 22:38:17,828 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-12 22:38:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 22:38:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-12 22:38:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 22:38:17,828 INFO L130 BoogieDeclarations]: Found specification of procedure osst_get_frame_position [2021-11-12 22:38:17,829 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_get_frame_position [2021-11-12 22:38:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-12 22:38:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 22:38:17,829 INFO L130 BoogieDeclarations]: Found specification of procedure osst_flush_buffer [2021-11-12 22:38:17,829 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_flush_buffer [2021-11-12 22:38:17,830 INFO L130 BoogieDeclarations]: Found specification of procedure osst_copy_from_buffer [2021-11-12 22:38:17,831 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_copy_from_buffer [2021-11-12 22:38:17,832 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-12 22:38:17,832 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-12 22:38:17,832 INFO L130 BoogieDeclarations]: Found specification of procedure iminor [2021-11-12 22:38:17,832 INFO L138 BoogieDeclarations]: Found implementation of procedure iminor [2021-11-12 22:38:17,832 INFO L130 BoogieDeclarations]: Found specification of procedure normalize_buffer [2021-11-12 22:38:17,833 INFO L138 BoogieDeclarations]: Found implementation of procedure normalize_buffer [2021-11-12 22:38:17,833 INFO L130 BoogieDeclarations]: Found specification of procedure osst_init_aux [2021-11-12 22:38:17,833 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_init_aux [2021-11-12 22:38:17,833 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_error_recovery [2021-11-12 22:38:17,833 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_error_recovery [2021-11-12 22:38:17,833 INFO L130 BoogieDeclarations]: Found specification of procedure osst_write_eod [2021-11-12 22:38:17,834 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_write_eod [2021-11-12 22:38:17,834 INFO L130 BoogieDeclarations]: Found specification of procedure msecs_to_jiffies [2021-11-12 22:38:17,834 INFO L138 BoogieDeclarations]: Found implementation of procedure msecs_to_jiffies [2021-11-12 22:38:17,834 INFO L130 BoogieDeclarations]: Found specification of procedure osst_space_over_filemarks_forward_slow [2021-11-12 22:38:17,834 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_space_over_filemarks_forward_slow [2021-11-12 22:38:17,835 INFO L130 BoogieDeclarations]: Found specification of procedure put_disk [2021-11-12 22:38:17,835 INFO L138 BoogieDeclarations]: Found implementation of procedure put_disk [2021-11-12 22:38:17,835 INFO L130 BoogieDeclarations]: Found specification of procedure sg_set_page [2021-11-12 22:38:17,835 INFO L138 BoogieDeclarations]: Found implementation of procedure sg_set_page [2021-11-12 22:38:17,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 22:38:17,835 INFO L130 BoogieDeclarations]: Found specification of procedure osst_recover_wait_frame [2021-11-12 22:38:17,836 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_recover_wait_frame [2021-11-12 22:38:17,836 INFO L130 BoogieDeclarations]: Found specification of procedure osst_wait_frame [2021-11-12 22:38:17,836 INFO L138 BoogieDeclarations]: Found implementation of procedure osst_wait_frame [2021-11-12 22:38:17,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 22:38:17,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 22:38:17,836 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-12 22:38:17,837 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-12 22:41:03,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 22:41:03,589 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-12 22:41:03,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:41:03 BoogieIcfgContainer [2021-11-12 22:41:03,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 22:41:03,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 22:41:03,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 22:41:03,612 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 22:41:03,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 10:38:11" (1/3) ... [2021-11-12 22:41:03,613 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be67327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:41:03, skipping insertion in model container [2021-11-12 22:41:03,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 10:38:16" (2/3) ... [2021-11-12 22:41:03,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3be67327 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 10:41:03, skipping insertion in model container [2021-11-12 22:41:03,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 10:41:03" (3/3) ... [2021-11-12 22:41:03,619 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.8-rc1-32_7a-drivers--scsi--osst.ko-ldv_main0_sequence_infinite_withcheck_stateful.cil.out.i [2021-11-12 22:41:03,628 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 22:41:03,629 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 22:41:03,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 22:41:03,730 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 [2021-11-12 22:41:03,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 22:41:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 2992 states, 2295 states have (on average 1.45359477124183) internal successors, (3336), 2321 states have internal predecessors, (3336), 603 states have call successors, (603), 92 states have call predecessors, (603), 92 states have return successors, (603), 600 states have call predecessors, (603), 603 states have call successors, (603) [2021-11-12 22:41:03,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-12 22:41:03,845 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:03,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:03,847 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:03,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:03,862 INFO L85 PathProgramCache]: Analyzing trace with hash 217154096, now seen corresponding path program 1 times [2021-11-12 22:41:03,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:03,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2046677708] [2021-11-12 22:41:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:03,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:03,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:03,897 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:03,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 22:41:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:12,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 1600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:41:12,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:12,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:12,944 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:12,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2046677708] [2021-11-12 22:41:12,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2046677708] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:12,946 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:12,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 22:41:12,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023742664] [2021-11-12 22:41:12,949 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:12,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:41:12,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:12,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:41:12,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:41:13,000 INFO L87 Difference]: Start difference. First operand has 2992 states, 2295 states have (on average 1.45359477124183) internal successors, (3336), 2321 states have internal predecessors, (3336), 603 states have call successors, (603), 92 states have call predecessors, (603), 92 states have return successors, (603), 600 states have call predecessors, (603), 603 states have call successors, (603) Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 22:41:16,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:16,905 INFO L93 Difference]: Finished difference Result 5975 states and 9294 transitions. [2021-11-12 22:41:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:41:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 38 [2021-11-12 22:41:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:16,983 INFO L225 Difference]: With dead ends: 5975 [2021-11-12 22:41:16,984 INFO L226 Difference]: Without dead ends: 2981 [2021-11-12 22:41:17,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:41:17,043 INFO L933 BasicCegarLoop]: 4528 mSDtfsCounter, 7847 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2716.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7847 SdHoareTripleChecker+Valid, 4528 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.14ms SdHoareTripleChecker+Time, 1197 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3397.22ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:17,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7847 Valid, 4528 Invalid, 1198 Unknown, 0 Unchecked, 58.14ms Time], IncrementalHoareTripleChecker [1197 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 3397.22ms Time] [2021-11-12 22:41:17,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-11-12 22:41:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2981. [2021-11-12 22:41:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2981 states, 2286 states have (on average 1.4510061242344707) internal successors, (3317), 2310 states have internal predecessors, (3317), 603 states have call successors, (603), 92 states have call predecessors, (603), 91 states have return successors, (595), 592 states have call predecessors, (595), 595 states have call successors, (595) [2021-11-12 22:41:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2981 states to 2981 states and 4515 transitions. [2021-11-12 22:41:17,393 INFO L78 Accepts]: Start accepts. Automaton has 2981 states and 4515 transitions. Word has length 38 [2021-11-12 22:41:17,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:17,395 INFO L470 AbstractCegarLoop]: Abstraction has 2981 states and 4515 transitions. [2021-11-12 22:41:17,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 22:41:17,396 INFO L276 IsEmpty]: Start isEmpty. Operand 2981 states and 4515 transitions. [2021-11-12 22:41:17,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-12 22:41:17,398 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:17,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:17,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:17,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:17,612 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:17,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:17,613 INFO L85 PathProgramCache]: Analyzing trace with hash 239786350, now seen corresponding path program 1 times [2021-11-12 22:41:17,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:17,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848786925] [2021-11-12 22:41:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:17,621 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:17,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:17,622 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:17,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 22:41:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:25,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 1599 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:41:25,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:25,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:26,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:26,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848786925] [2021-11-12 22:41:26,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848786925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:26,101 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:26,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 22:41:26,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241264572] [2021-11-12 22:41:26,101 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:26,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:41:26,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:26,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:41:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:41:26,105 INFO L87 Difference]: Start difference. First operand 2981 states and 4515 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 22:41:28,439 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:41:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:28,899 INFO L93 Difference]: Finished difference Result 8841 states and 13392 transitions. [2021-11-12 22:41:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:41:28,903 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 38 [2021-11-12 22:41:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:28,988 INFO L225 Difference]: With dead ends: 8841 [2021-11-12 22:41:28,988 INFO L226 Difference]: Without dead ends: 5868 [2021-11-12 22:41:29,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:41:29,022 INFO L933 BasicCegarLoop]: 5084 mSDtfsCounter, 4413 mSDsluCounter, 8924 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2158.21ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4413 SdHoareTripleChecker+Valid, 14008 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.76ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2201.48ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:29,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4413 Valid, 14008 Invalid, 9 Unknown, 0 Unchecked, 51.76ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2201.48ms Time] [2021-11-12 22:41:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2021-11-12 22:41:29,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 5851. [2021-11-12 22:41:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5851 states, 4496 states have (on average 1.4519572953736655) internal successors, (6528), 4533 states have internal predecessors, (6528), 1174 states have call successors, (1174), 181 states have call predecessors, (1174), 180 states have return successors, (1166), 1160 states have call predecessors, (1166), 1166 states have call successors, (1166) [2021-11-12 22:41:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5851 states to 5851 states and 8868 transitions. [2021-11-12 22:41:29,476 INFO L78 Accepts]: Start accepts. Automaton has 5851 states and 8868 transitions. Word has length 38 [2021-11-12 22:41:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:29,477 INFO L470 AbstractCegarLoop]: Abstraction has 5851 states and 8868 transitions. [2021-11-12 22:41:29,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 22:41:29,478 INFO L276 IsEmpty]: Start isEmpty. Operand 5851 states and 8868 transitions. [2021-11-12 22:41:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-12 22:41:29,483 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:29,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:29,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-12 22:41:29,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:29,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:29,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:29,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1625989744, now seen corresponding path program 1 times [2021-11-12 22:41:29,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:29,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [295678025] [2021-11-12 22:41:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:29,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:29,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:29,716 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:29,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 22:41:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:37,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 1598 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:41:37,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:37,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:37,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:37,852 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:37,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [295678025] [2021-11-12 22:41:37,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [295678025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:37,855 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:37,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 22:41:37,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646831146] [2021-11-12 22:41:37,855 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:37,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:41:37,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:37,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:41:37,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:41:37,857 INFO L87 Difference]: Start difference. First operand 5851 states and 8868 transitions. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 22:41:41,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:41,615 INFO L93 Difference]: Finished difference Result 11693 states and 17724 transitions. [2021-11-12 22:41:41,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:41:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 38 [2021-11-12 22:41:41,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:41,688 INFO L225 Difference]: With dead ends: 11693 [2021-11-12 22:41:41,688 INFO L226 Difference]: Without dead ends: 5851 [2021-11-12 22:41:41,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:41:41,736 INFO L933 BasicCegarLoop]: 4512 mSDtfsCounter, 7811 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 1197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2630.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7811 SdHoareTripleChecker+Valid, 4512 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.73ms SdHoareTripleChecker+Time, 1197 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3291.49ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:41,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7811 Valid, 4512 Invalid, 1198 Unknown, 0 Unchecked, 34.73ms Time], IncrementalHoareTripleChecker [1197 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 3291.49ms Time] [2021-11-12 22:41:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5851 states. [2021-11-12 22:41:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5851 to 5851. [2021-11-12 22:41:42,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5851 states, 4496 states have (on average 1.4517348754448398) internal successors, (6527), 4533 states have internal predecessors, (6527), 1174 states have call successors, (1174), 181 states have call predecessors, (1174), 180 states have return successors, (1166), 1160 states have call predecessors, (1166), 1166 states have call successors, (1166) [2021-11-12 22:41:42,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5851 states to 5851 states and 8867 transitions. [2021-11-12 22:41:42,212 INFO L78 Accepts]: Start accepts. Automaton has 5851 states and 8867 transitions. Word has length 38 [2021-11-12 22:41:42,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:42,212 INFO L470 AbstractCegarLoop]: Abstraction has 5851 states and 8867 transitions. [2021-11-12 22:41:42,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-12 22:41:42,214 INFO L276 IsEmpty]: Start isEmpty. Operand 5851 states and 8867 transitions. [2021-11-12 22:41:42,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-12 22:41:42,218 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:42,219 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:42,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:42,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:42,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:42,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1116516654, now seen corresponding path program 1 times [2021-11-12 22:41:42,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:42,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1550013549] [2021-11-12 22:41:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:42,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:42,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:42,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-12 22:41:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:41:50,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:41:50,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:41:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:50,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:41:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:41:50,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:41:50,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1550013549] [2021-11-12 22:41:50,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1550013549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:41:50,895 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:41:50,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:41:50,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034117492] [2021-11-12 22:41:50,895 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:41:50,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:41:50,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:41:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:41:50,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:41:50,897 INFO L87 Difference]: Start difference. First operand 5851 states and 8867 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:41:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:41:52,448 INFO L93 Difference]: Finished difference Result 18264 states and 28317 transitions. [2021-11-12 22:41:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:41:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 38 [2021-11-12 22:41:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:41:52,766 INFO L225 Difference]: With dead ends: 18264 [2021-11-12 22:41:52,772 INFO L226 Difference]: Without dead ends: 12453 [2021-11-12 22:41:52,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:41:52,817 INFO L933 BasicCegarLoop]: 7458 mSDtfsCounter, 3908 mSDsluCounter, 11602 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 712.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4353 SdHoareTripleChecker+Valid, 19060 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.44ms SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 886.86ms IncrementalHoareTripleChecker+Time [2021-11-12 22:41:52,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4353 Valid, 19060 Invalid, 463 Unknown, 0 Unchecked, 52.44ms Time], IncrementalHoareTripleChecker [447 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 886.86ms Time] [2021-11-12 22:41:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12453 states. [2021-11-12 22:41:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12453 to 5853. [2021-11-12 22:41:53,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5853 states, 4498 states have (on average 1.4515340151178302) internal successors, (6529), 4535 states have internal predecessors, (6529), 1174 states have call successors, (1174), 181 states have call predecessors, (1174), 180 states have return successors, (1166), 1160 states have call predecessors, (1166), 1166 states have call successors, (1166) [2021-11-12 22:41:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5853 states to 5853 states and 8869 transitions. [2021-11-12 22:41:53,542 INFO L78 Accepts]: Start accepts. Automaton has 5853 states and 8869 transitions. Word has length 38 [2021-11-12 22:41:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:41:53,543 INFO L470 AbstractCegarLoop]: Abstraction has 5853 states and 8869 transitions. [2021-11-12 22:41:53,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-12 22:41:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 5853 states and 8869 transitions. [2021-11-12 22:41:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-12 22:41:53,550 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:41:53,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:41:53,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-12 22:41:53,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:41:53,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:41:53,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:41:53,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1065775179, now seen corresponding path program 1 times [2021-11-12 22:41:53,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:41:53,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1978583832] [2021-11-12 22:41:53,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:41:53,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:41:53,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:41:53,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:41:53,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 22:42:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:42:01,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1607 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-12 22:42:01,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:42:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:42:03,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:42:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:42:08,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:42:08,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1978583832] [2021-11-12 22:42:08,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1978583832] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:42:08,234 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:42:08,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 12] imperfect sequences [] total 20 [2021-11-12 22:42:08,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509870833] [2021-11-12 22:42:08,234 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:42:08,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 22:42:08,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:42:08,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 22:42:08,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-12 22:42:08,237 INFO L87 Difference]: Start difference. First operand 5853 states and 8869 transitions. Second operand has 20 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-12 22:42:10,699 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:12,721 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:14,735 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:16,753 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:18,771 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:42:20,782 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:21,850 INFO L93 Difference]: Finished difference Result 19734 states and 30148 transitions. [2021-11-12 22:43:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:43:21,851 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 43 [2021-11-12 22:43:21,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:21,975 INFO L225 Difference]: With dead ends: 19734 [2021-11-12 22:43:21,976 INFO L226 Difference]: Without dead ends: 13904 [2021-11-12 22:43:22,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-11-12 22:43:22,020 INFO L933 BasicCegarLoop]: 6209 mSDtfsCounter, 12718 mSDsluCounter, 68554 mSDsCounter, 0 mSdLazyCounter, 7454 mSolverCounterSat, 2123 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65940.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12963 SdHoareTripleChecker+Valid, 74763 SdHoareTripleChecker+Invalid, 9583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 236.88ms SdHoareTripleChecker+Time, 2123 IncrementalHoareTripleChecker+Valid, 7454 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 69957.30ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:22,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12963 Valid, 74763 Invalid, 9583 Unknown, 0 Unchecked, 236.88ms Time], IncrementalHoareTripleChecker [2123 Valid, 7454 Invalid, 6 Unknown, 0 Unchecked, 69957.30ms Time] [2021-11-12 22:43:22,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13904 states. [2021-11-12 22:43:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13904 to 8743. [2021-11-12 22:43:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8743 states, 6724 states have (on average 1.4516656751933372) internal successors, (9761), 6776 states have internal predecessors, (9761), 1749 states have call successors, (1749), 269 states have call predecessors, (1749), 269 states have return successors, (1749), 1733 states have call predecessors, (1749), 1741 states have call successors, (1749) [2021-11-12 22:43:22,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8743 states to 8743 states and 13259 transitions. [2021-11-12 22:43:23,003 INFO L78 Accepts]: Start accepts. Automaton has 8743 states and 13259 transitions. Word has length 43 [2021-11-12 22:43:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 8743 states and 13259 transitions. [2021-11-12 22:43:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-12 22:43:23,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8743 states and 13259 transitions. [2021-11-12 22:43:23,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-12 22:43:23,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:23,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:43:23,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:23,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:23,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:23,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash -477487541, now seen corresponding path program 1 times [2021-11-12 22:43:23,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:23,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702771273] [2021-11-12 22:43:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:23,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:23,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:23,247 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:23,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-12 22:43:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:30,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1622 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:43:30,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:31,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:43:31,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:43:31,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:31,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702771273] [2021-11-12 22:43:31,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702771273] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:31,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:31,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:43:31,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16485755] [2021-11-12 22:43:31,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:31,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:43:31,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:31,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:43:31,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:43:31,510 INFO L87 Difference]: Start difference. First operand 8743 states and 13259 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:43:33,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:34,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:34,384 INFO L93 Difference]: Finished difference Result 8745 states and 13260 transitions. [2021-11-12 22:43:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:43:34,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 46 [2021-11-12 22:43:34,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:34,441 INFO L225 Difference]: With dead ends: 8745 [2021-11-12 22:43:34,441 INFO L226 Difference]: Without dead ends: 8742 [2021-11-12 22:43:34,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:43:34,450 INFO L933 BasicCegarLoop]: 4510 mSDtfsCounter, 4468 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2341.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4468 SdHoareTripleChecker+Valid, 4510 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.84ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2435.99ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:34,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4468 Valid, 4510 Invalid, 2 Unknown, 0 Unchecked, 8.84ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2435.99ms Time] [2021-11-12 22:43:34,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8742 states. [2021-11-12 22:43:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8742 to 8742. [2021-11-12 22:43:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8742 states, 6724 states have (on average 1.4515169541939321) internal successors, (9760), 6775 states have internal predecessors, (9760), 1748 states have call successors, (1748), 269 states have call predecessors, (1748), 269 states have return successors, (1749), 1733 states have call predecessors, (1749), 1741 states have call successors, (1749) [2021-11-12 22:43:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8742 states to 8742 states and 13257 transitions. [2021-11-12 22:43:35,158 INFO L78 Accepts]: Start accepts. Automaton has 8742 states and 13257 transitions. Word has length 46 [2021-11-12 22:43:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:35,158 INFO L470 AbstractCegarLoop]: Abstraction has 8742 states and 13257 transitions. [2021-11-12 22:43:35,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:43:35,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8742 states and 13257 transitions. [2021-11-12 22:43:35,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-12 22:43:35,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:35,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:43:35,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:35,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:35,365 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:35,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:35,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1918336085, now seen corresponding path program 1 times [2021-11-12 22:43:35,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:35,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127129441] [2021-11-12 22:43:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:35,369 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:35,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:35,370 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:35,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 22:43:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:42,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 1623 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:43:42,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:43:43,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:43,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:43:43,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:43,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127129441] [2021-11-12 22:43:43,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127129441] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:43,591 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:43,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:43:43,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855764842] [2021-11-12 22:43:43,592 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:43,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:43:43,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:43:43,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:43:43,594 INFO L87 Difference]: Start difference. First operand 8742 states and 13257 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:43:45,890 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.29s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:46,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:46,887 INFO L93 Difference]: Finished difference Result 26017 states and 39508 transitions. [2021-11-12 22:43:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:43:46,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 47 [2021-11-12 22:43:46,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:47,054 INFO L225 Difference]: With dead ends: 26017 [2021-11-12 22:43:47,054 INFO L226 Difference]: Without dead ends: 17345 [2021-11-12 22:43:47,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:43:47,109 INFO L933 BasicCegarLoop]: 6288 mSDtfsCounter, 4463 mSDsluCounter, 4421 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2321.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4463 SdHoareTripleChecker+Valid, 10709 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.70ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2405.90ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:47,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4463 Valid, 10709 Invalid, 14 Unknown, 0 Unchecked, 21.70ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 1 Unknown, 0 Unchecked, 2405.90ms Time] [2021-11-12 22:43:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17345 states. [2021-11-12 22:43:48,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17345 to 17310. [2021-11-12 22:43:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17310 states, 13337 states have (on average 1.4536252530554097) internal successors, (19387), 13440 states have internal predecessors, (19387), 3441 states have call successors, (3441), 532 states have call predecessors, (3441), 531 states have return successors, (3456), 3405 states have call predecessors, (3456), 3430 states have call successors, (3456) [2021-11-12 22:43:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17310 states to 17310 states and 26284 transitions. [2021-11-12 22:43:48,447 INFO L78 Accepts]: Start accepts. Automaton has 17310 states and 26284 transitions. Word has length 47 [2021-11-12 22:43:48,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:43:48,448 INFO L470 AbstractCegarLoop]: Abstraction has 17310 states and 26284 transitions. [2021-11-12 22:43:48,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:43:48,448 INFO L276 IsEmpty]: Start isEmpty. Operand 17310 states and 26284 transitions. [2021-11-12 22:43:48,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-12 22:43:48,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:43:48,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:43:48,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 22:43:48,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:43:48,664 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:43:48,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:43:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash 660004174, now seen corresponding path program 1 times [2021-11-12 22:43:48,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:43:48,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247510202] [2021-11-12 22:43:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:43:48,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:43:48,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:43:48,672 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:43:48,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-12 22:43:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:43:55,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 1624 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:43:55,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:43:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:43:56,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:43:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:43:56,611 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:43:56,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247510202] [2021-11-12 22:43:56,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247510202] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:43:56,611 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:43:56,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:43:56,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603522196] [2021-11-12 22:43:56,612 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:43:56,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:43:56,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:43:56,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:43:56,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:43:56,613 INFO L87 Difference]: Start difference. First operand 17310 states and 26284 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:43:58,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:43:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:43:59,631 INFO L93 Difference]: Finished difference Result 17312 states and 26285 transitions. [2021-11-12 22:43:59,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:43:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 48 [2021-11-12 22:43:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:43:59,762 INFO L225 Difference]: With dead ends: 17312 [2021-11-12 22:43:59,763 INFO L226 Difference]: Without dead ends: 17309 [2021-11-12 22:43:59,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:43:59,784 INFO L933 BasicCegarLoop]: 4508 mSDtfsCounter, 4464 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2296.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4464 SdHoareTripleChecker+Valid, 4508 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2379.82ms IncrementalHoareTripleChecker+Time [2021-11-12 22:43:59,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4464 Valid, 4508 Invalid, 2 Unknown, 0 Unchecked, 8.83ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 2379.82ms Time] [2021-11-12 22:43:59,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17309 states. [2021-11-12 22:44:00,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17309 to 17309. [2021-11-12 22:44:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17309 states, 13337 states have (on average 1.4535502736747394) internal successors, (19386), 13439 states have internal predecessors, (19386), 3440 states have call successors, (3440), 532 states have call predecessors, (3440), 531 states have return successors, (3456), 3405 states have call predecessors, (3456), 3430 states have call successors, (3456) [2021-11-12 22:44:01,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17309 states to 17309 states and 26282 transitions. [2021-11-12 22:44:01,022 INFO L78 Accepts]: Start accepts. Automaton has 17309 states and 26282 transitions. Word has length 48 [2021-11-12 22:44:01,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:01,023 INFO L470 AbstractCegarLoop]: Abstraction has 17309 states and 26282 transitions. [2021-11-12 22:44:01,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:44:01,023 INFO L276 IsEmpty]: Start isEmpty. Operand 17309 states and 26282 transitions. [2021-11-12 22:44:01,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-12 22:44:01,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:01,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:44:01,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-12 22:44:01,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:44:01,240 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:01,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:01,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1015821554, now seen corresponding path program 1 times [2021-11-12 22:44:01,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:44:01,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317469956] [2021-11-12 22:44:01,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:01,246 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:44:01,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:44:01,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:44:01,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 22:44:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1625 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:44:08,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:44:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:44:09,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:44:09,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:44:09,730 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:44:09,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317469956] [2021-11-12 22:44:09,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317469956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:44:09,731 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:44:09,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:44:09,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049235666] [2021-11-12 22:44:09,732 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:44:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:44:09,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:44:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:44:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:44:09,734 INFO L87 Difference]: Start difference. First operand 17309 states and 26282 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:44:12,097 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:44:13,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:13,058 INFO L93 Difference]: Finished difference Result 24693 states and 36833 transitions. [2021-11-12 22:44:13,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:44:13,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 49 [2021-11-12 22:44:13,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:13,305 INFO L225 Difference]: With dead ends: 24693 [2021-11-12 22:44:13,306 INFO L226 Difference]: Without dead ends: 24599 [2021-11-12 22:44:13,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:44:13,346 INFO L933 BasicCegarLoop]: 4764 mSDtfsCounter, 2788 mSDsluCounter, 3432 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2372.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2788 SdHoareTripleChecker+Valid, 8196 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.19ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2447.24ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:13,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2788 Valid, 8196 Invalid, 7 Unknown, 0 Unchecked, 13.19ms Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2447.24ms Time] [2021-11-12 22:44:13,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24599 states. [2021-11-12 22:44:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24599 to 24591. [2021-11-12 22:44:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24591 states, 18716 states have (on average 1.4297926907458858) internal successors, (26760), 18852 states have internal predecessors, (26760), 4944 states have call successors, (4944), 931 states have call predecessors, (4944), 930 states have return successors, (4961), 4907 states have call predecessors, (4961), 4936 states have call successors, (4961) [2021-11-12 22:44:15,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24591 states to 24591 states and 36665 transitions. [2021-11-12 22:44:15,468 INFO L78 Accepts]: Start accepts. Automaton has 24591 states and 36665 transitions. Word has length 49 [2021-11-12 22:44:15,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:15,468 INFO L470 AbstractCegarLoop]: Abstraction has 24591 states and 36665 transitions. [2021-11-12 22:44:15,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-12 22:44:15,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24591 states and 36665 transitions. [2021-11-12 22:44:15,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 22:44:15,480 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:15,481 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:44:15,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 22:44:15,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:44:15,685 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:15,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:15,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1027358375, now seen corresponding path program 1 times [2021-11-12 22:44:15,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:44:15,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [777834931] [2021-11-12 22:44:15,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:15,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:44:15,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:44:15,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:44:15,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-12 22:44:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:23,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1742 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:44:23,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:44:23,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:44:23,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:44:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:44:23,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:44:23,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [777834931] [2021-11-12 22:44:23,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [777834931] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:44:23,889 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:44:23,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:44:23,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504911607] [2021-11-12 22:44:23,889 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:44:23,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:44:23,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:44:23,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:44:23,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:44:23,890 INFO L87 Difference]: Start difference. First operand 24591 states and 36665 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:44:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:25,085 INFO L93 Difference]: Finished difference Result 40978 states and 61109 transitions. [2021-11-12 22:44:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:44:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 88 [2021-11-12 22:44:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:25,307 INFO L225 Difference]: With dead ends: 40978 [2021-11-12 22:44:25,308 INFO L226 Difference]: Without dead ends: 24591 [2021-11-12 22:44:25,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:44:25,426 INFO L933 BasicCegarLoop]: 4501 mSDtfsCounter, 1 mSDsluCounter, 8996 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13497 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.16ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:25,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 13497 Invalid, 8 Unknown, 0 Unchecked, 15.16ms Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 29.39ms Time] [2021-11-12 22:44:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24591 states. [2021-11-12 22:44:27,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24591 to 24589. [2021-11-12 22:44:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24589 states, 18714 states have (on average 1.4297851875601155) internal successors, (26757), 18850 states have internal predecessors, (26757), 4944 states have call successors, (4944), 931 states have call predecessors, (4944), 930 states have return successors, (4961), 4907 states have call predecessors, (4961), 4936 states have call successors, (4961) [2021-11-12 22:44:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24589 states to 24589 states and 36662 transitions. [2021-11-12 22:44:27,400 INFO L78 Accepts]: Start accepts. Automaton has 24589 states and 36662 transitions. Word has length 88 [2021-11-12 22:44:27,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:27,401 INFO L470 AbstractCegarLoop]: Abstraction has 24589 states and 36662 transitions. [2021-11-12 22:44:27,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-12 22:44:27,402 INFO L276 IsEmpty]: Start isEmpty. Operand 24589 states and 36662 transitions. [2021-11-12 22:44:27,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-12 22:44:27,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:27,409 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:44:27,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-12 22:44:27,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:44:27,627 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:27,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:27,628 INFO L85 PathProgramCache]: Analyzing trace with hash 2041420433, now seen corresponding path program 1 times [2021-11-12 22:44:27,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:44:27,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063693668] [2021-11-12 22:44:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:27,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:44:27,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:44:27,634 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:44:27,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-12 22:44:35,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:35,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 1755 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:44:35,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:44:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:44:35,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:44:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:44:36,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:44:36,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063693668] [2021-11-12 22:44:36,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063693668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:44:36,095 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:44:36,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 22:44:36,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059780998] [2021-11-12 22:44:36,096 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:44:36,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 22:44:36,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:44:36,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 22:44:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:44:36,098 INFO L87 Difference]: Start difference. First operand 24589 states and 36662 transitions. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:44:38,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:38,173 INFO L93 Difference]: Finished difference Result 49100 states and 73235 transitions. [2021-11-12 22:44:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:44:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 89 [2021-11-12 22:44:38,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:38,432 INFO L225 Difference]: With dead ends: 49100 [2021-11-12 22:44:38,432 INFO L226 Difference]: Without dead ends: 24559 [2021-11-12 22:44:38,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-12 22:44:38,608 INFO L933 BasicCegarLoop]: 4501 mSDtfsCounter, 6 mSDsluCounter, 22464 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 150.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 26965 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.35ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 161.27ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:38,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 26965 Invalid, 42 Unknown, 0 Unchecked, 29.35ms Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 161.27ms Time] [2021-11-12 22:44:38,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24559 states. [2021-11-12 22:44:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24559 to 24559. [2021-11-12 22:44:40,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24559 states, 18696 states have (on average 1.4298780487804879) internal successors, (26733), 18828 states have internal predecessors, (26733), 4938 states have call successors, (4938), 925 states have call predecessors, (4938), 924 states have return successors, (4955), 4901 states have call predecessors, (4955), 4930 states have call successors, (4955) [2021-11-12 22:44:40,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24559 states to 24559 states and 36626 transitions. [2021-11-12 22:44:40,369 INFO L78 Accepts]: Start accepts. Automaton has 24559 states and 36626 transitions. Word has length 89 [2021-11-12 22:44:40,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:40,370 INFO L470 AbstractCegarLoop]: Abstraction has 24559 states and 36626 transitions. [2021-11-12 22:44:40,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 4 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-12 22:44:40,371 INFO L276 IsEmpty]: Start isEmpty. Operand 24559 states and 36626 transitions. [2021-11-12 22:44:40,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-12 22:44:40,376 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:40,376 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:44:40,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-12 22:44:40,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:44:40,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:40,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:40,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1415502185, now seen corresponding path program 1 times [2021-11-12 22:44:40,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:44:40,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720593305] [2021-11-12 22:44:40,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:40,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:44:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:44:40,586 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:44:40,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 22:44:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:44:48,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1767 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 22:44:48,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:44:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-12 22:44:48,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:44:49,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:44:49,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:44:49,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720593305] [2021-11-12 22:44:49,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720593305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:44:49,234 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:44:49,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-12 22:44:49,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027731013] [2021-11-12 22:44:49,234 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:44:49,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:44:49,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:44:49,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:44:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:44:49,236 INFO L87 Difference]: Start difference. First operand 24559 states and 36626 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:44:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:44:51,953 INFO L93 Difference]: Finished difference Result 55006 states and 82873 transitions. [2021-11-12 22:44:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:44:51,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 88 [2021-11-12 22:44:51,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:44:52,174 INFO L225 Difference]: With dead ends: 55006 [2021-11-12 22:44:52,175 INFO L226 Difference]: Without dead ends: 30507 [2021-11-12 22:44:52,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:44:52,595 INFO L933 BasicCegarLoop]: 4685 mSDtfsCounter, 1859 mSDsluCounter, 8249 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 819.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2160 SdHoareTripleChecker+Valid, 12934 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.27ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 907.15ms IncrementalHoareTripleChecker+Time [2021-11-12 22:44:52,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2160 Valid, 12934 Invalid, 176 Unknown, 0 Unchecked, 19.27ms Time], IncrementalHoareTripleChecker [9 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 907.15ms Time] [2021-11-12 22:44:52,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30507 states. [2021-11-12 22:44:54,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30507 to 28695. [2021-11-12 22:44:54,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28695 states, 22074 states have (on average 1.4439159191809368) internal successors, (31873), 22238 states have internal predecessors, (31873), 5696 states have call successors, (5696), 925 states have call predecessors, (5696), 924 states have return successors, (5727), 5649 states have call predecessors, (5727), 5688 states have call successors, (5727) [2021-11-12 22:44:54,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28695 states to 28695 states and 43296 transitions. [2021-11-12 22:44:54,662 INFO L78 Accepts]: Start accepts. Automaton has 28695 states and 43296 transitions. Word has length 88 [2021-11-12 22:44:54,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:44:54,663 INFO L470 AbstractCegarLoop]: Abstraction has 28695 states and 43296 transitions. [2021-11-12 22:44:54,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 4 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2021-11-12 22:44:54,663 INFO L276 IsEmpty]: Start isEmpty. Operand 28695 states and 43296 transitions. [2021-11-12 22:44:54,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-12 22:44:54,668 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:44:54,668 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:44:54,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 22:44:54,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:44:54,884 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:44:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:44:54,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2081266200, now seen corresponding path program 1 times [2021-11-12 22:44:54,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:44:54,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [340269801] [2021-11-12 22:44:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:44:54,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:44:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:44:54,891 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:44:54,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-12 22:45:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:45:02,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1769 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:45:02,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:45:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:45:03,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:45:03,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:45:03,586 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:45:03,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [340269801] [2021-11-12 22:45:03,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [340269801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:45:03,587 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:45:03,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:45:03,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300855139] [2021-11-12 22:45:03,587 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:45:03,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:45:03,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:45:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:45:03,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:45:03,589 INFO L87 Difference]: Start difference. First operand 28695 states and 43296 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:45:06,024 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:45:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:07,471 INFO L93 Difference]: Finished difference Result 28703 states and 43302 transitions. [2021-11-12 22:45:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:45:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 90 [2021-11-12 22:45:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:07,629 INFO L225 Difference]: With dead ends: 28703 [2021-11-12 22:45:07,630 INFO L226 Difference]: Without dead ends: 28700 [2021-11-12 22:45:07,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:45:07,651 INFO L933 BasicCegarLoop]: 6181 mSDtfsCounter, 3404 mSDsluCounter, 2817 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2443.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 8998 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2525.39ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:07,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3404 Valid, 8998 Invalid, 5 Unknown, 0 Unchecked, 12.83ms Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 1 Unknown, 0 Unchecked, 2525.39ms Time] [2021-11-12 22:45:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28700 states. [2021-11-12 22:45:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28700 to 28694. [2021-11-12 22:45:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28694 states, 22074 states have (on average 1.4436441061882759) internal successors, (31867), 22237 states have internal predecessors, (31867), 5695 states have call successors, (5695), 925 states have call predecessors, (5695), 924 states have return successors, (5727), 5649 states have call predecessors, (5727), 5688 states have call successors, (5727) [2021-11-12 22:45:09,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28694 states to 28694 states and 43289 transitions. [2021-11-12 22:45:09,528 INFO L78 Accepts]: Start accepts. Automaton has 28694 states and 43289 transitions. Word has length 90 [2021-11-12 22:45:09,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:45:09,529 INFO L470 AbstractCegarLoop]: Abstraction has 28694 states and 43289 transitions. [2021-11-12 22:45:09,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-11-12 22:45:09,529 INFO L276 IsEmpty]: Start isEmpty. Operand 28694 states and 43289 transitions. [2021-11-12 22:45:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:45:09,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:45:09,536 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:45:09,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-12 22:45:09,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:45:09,760 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:45:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:45:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1485246726, now seen corresponding path program 1 times [2021-11-12 22:45:09,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:45:09,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2010607826] [2021-11-12 22:45:09,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:45:09,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:45:09,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:45:09,766 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:45:09,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-12 22:45:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:45:17,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 1802 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-12 22:45:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:45:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:45:18,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:45:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:45:18,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:45:18,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2010607826] [2021-11-12 22:45:18,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2010607826] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:45:18,575 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:45:18,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-12 22:45:18,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026587282] [2021-11-12 22:45:18,576 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:45:18,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 22:45:18,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:45:18,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 22:45:18,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:45:18,577 INFO L87 Difference]: Start difference. First operand 28694 states and 43289 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:45:20,880 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:45:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:22,939 INFO L93 Difference]: Finished difference Result 57330 states and 86512 transitions. [2021-11-12 22:45:22,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 22:45:22,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 101 [2021-11-12 22:45:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:23,124 INFO L225 Difference]: With dead ends: 57330 [2021-11-12 22:45:23,124 INFO L226 Difference]: Without dead ends: 28696 [2021-11-12 22:45:23,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-12 22:45:23,247 INFO L933 BasicCegarLoop]: 7945 mSDtfsCounter, 4400 mSDsluCounter, 4423 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2321.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4400 SdHoareTripleChecker+Valid, 12368 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.21ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2405.80ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:23,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4400 Valid, 12368 Invalid, 9 Unknown, 0 Unchecked, 18.21ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2405.80ms Time] [2021-11-12 22:45:23,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28696 states. [2021-11-12 22:45:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28696 to 28588. [2021-11-12 22:45:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28588 states, 22020 states have (on average 1.4441871026339692) internal successors, (31801), 22182 states have internal predecessors, (31801), 5647 states have call successors, (5647), 916 states have call predecessors, (5647), 920 states have return successors, (5661), 5607 states have call predecessors, (5661), 5637 states have call successors, (5661) [2021-11-12 22:45:25,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28588 states to 28588 states and 43109 transitions. [2021-11-12 22:45:25,227 INFO L78 Accepts]: Start accepts. Automaton has 28588 states and 43109 transitions. Word has length 101 [2021-11-12 22:45:25,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:45:25,228 INFO L470 AbstractCegarLoop]: Abstraction has 28588 states and 43109 transitions. [2021-11-12 22:45:25,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-12 22:45:25,228 INFO L276 IsEmpty]: Start isEmpty. Operand 28588 states and 43109 transitions. [2021-11-12 22:45:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-12 22:45:25,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:45:25,235 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-12 22:45:25,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-12 22:45:25,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:45:25,460 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:45:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:45:25,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1894070951, now seen corresponding path program 1 times [2021-11-12 22:45:25,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:45:25,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1570835337] [2021-11-12 22:45:25,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:45:25,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:45:25,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:45:25,465 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:45:25,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 22:45:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:45:33,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 1801 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:45:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:45:33,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:45:33,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:45:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:45:34,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:45:34,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1570835337] [2021-11-12 22:45:34,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1570835337] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:45:34,230 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:45:34,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:45:34,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337858689] [2021-11-12 22:45:34,231 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:45:34,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:45:34,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:45:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:45:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:45:34,232 INFO L87 Difference]: Start difference. First operand 28588 states and 43109 transitions. Second operand has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:45:38,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:38,399 INFO L93 Difference]: Finished difference Result 40373 states and 61467 transitions. [2021-11-12 22:45:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:45:38,400 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) Word has length 101 [2021-11-12 22:45:38,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:38,578 INFO L225 Difference]: With dead ends: 40373 [2021-11-12 22:45:38,578 INFO L226 Difference]: Without dead ends: 35028 [2021-11-12 22:45:38,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:45:38,622 INFO L933 BasicCegarLoop]: 6623 mSDtfsCounter, 3748 mSDsluCounter, 30759 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1583.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3889 SdHoareTripleChecker+Valid, 37382 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.31ms SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1822.70ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:38,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3889 Valid, 37382 Invalid, 878 Unknown, 0 Unchecked, 52.31ms Time], IncrementalHoareTripleChecker [712 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1822.70ms Time] [2021-11-12 22:45:38,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35028 states. [2021-11-12 22:45:40,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35028 to 25540. [2021-11-12 22:45:40,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25540 states, 19583 states have (on average 1.434969105857121) internal successors, (28101), 19733 states have internal predecessors, (28101), 5099 states have call successors, (5099), 853 states have call predecessors, (5099), 857 states have return successors, (5115), 5068 states have call predecessors, (5115), 5091 states have call successors, (5115) [2021-11-12 22:45:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25540 states to 25540 states and 38315 transitions. [2021-11-12 22:45:40,762 INFO L78 Accepts]: Start accepts. Automaton has 25540 states and 38315 transitions. Word has length 101 [2021-11-12 22:45:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:45:40,763 INFO L470 AbstractCegarLoop]: Abstraction has 25540 states and 38315 transitions. [2021-11-12 22:45:40,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.3) internal successors, (83), 8 states have internal predecessors, (83), 2 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 4 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-12 22:45:40,764 INFO L276 IsEmpty]: Start isEmpty. Operand 25540 states and 38315 transitions. [2021-11-12 22:45:40,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-12 22:45:40,787 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:45:40,788 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-11-12 22:45:40,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 22:45:41,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:45:41,012 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:45:41,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:45:41,013 INFO L85 PathProgramCache]: Analyzing trace with hash 503134279, now seen corresponding path program 1 times [2021-11-12 22:45:41,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:45:41,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010479967] [2021-11-12 22:45:41,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:45:41,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:45:41,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:45:41,018 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:45:41,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 22:45:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:45:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 1863 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:45:48,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:45:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-12 22:45:48,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:45:49,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-12 22:45:49,235 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:45:49,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010479967] [2021-11-12 22:45:49,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010479967] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:45:49,235 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:45:49,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-12 22:45:49,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63544994] [2021-11-12 22:45:49,236 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:45:49,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:45:49,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:45:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:45:49,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:45:49,238 INFO L87 Difference]: Start difference. First operand 25540 states and 38315 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:45:52,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:45:52,567 INFO L93 Difference]: Finished difference Result 41532 states and 62671 transitions. [2021-11-12 22:45:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:45:52,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) Word has length 129 [2021-11-12 22:45:52,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:45:52,693 INFO L225 Difference]: With dead ends: 41532 [2021-11-12 22:45:52,693 INFO L226 Difference]: Without dead ends: 32335 [2021-11-12 22:45:52,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-12 22:45:52,728 INFO L933 BasicCegarLoop]: 5776 mSDtfsCounter, 2681 mSDsluCounter, 19992 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 796.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2684 SdHoareTripleChecker+Valid, 25768 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.63ms SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 949.32ms IncrementalHoareTripleChecker+Time [2021-11-12 22:45:52,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2684 Valid, 25768 Invalid, 453 Unknown, 0 Unchecked, 34.63ms Time], IncrementalHoareTripleChecker [432 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 949.32ms Time] [2021-11-12 22:45:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32335 states. [2021-11-12 22:45:54,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32335 to 25504. [2021-11-12 22:45:54,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25504 states, 19565 states have (on average 1.4349092767697418) internal successors, (28074), 19715 states have internal predecessors, (28074), 5081 states have call successors, (5081), 853 states have call predecessors, (5081), 857 states have return successors, (5097), 5050 states have call predecessors, (5097), 5073 states have call successors, (5097) [2021-11-12 22:45:54,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25504 states to 25504 states and 38252 transitions. [2021-11-12 22:45:54,625 INFO L78 Accepts]: Start accepts. Automaton has 25504 states and 38252 transitions. Word has length 129 [2021-11-12 22:45:54,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:45:54,626 INFO L470 AbstractCegarLoop]: Abstraction has 25504 states and 38252 transitions. [2021-11-12 22:45:54,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 2 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 3 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-12 22:45:54,627 INFO L276 IsEmpty]: Start isEmpty. Operand 25504 states and 38252 transitions. [2021-11-12 22:45:54,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-12 22:45:54,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:45:54,662 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:45:54,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 22:45:54,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:45:54,888 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:45:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:45:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1359405780, now seen corresponding path program 1 times [2021-11-12 22:45:54,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:45:54,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582870210] [2021-11-12 22:45:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:45:54,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:45:54,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:45:54,894 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:45:54,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-12 22:46:02,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:46:02,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1911 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 22:46:02,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:46:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-12 22:46:03,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:46:04,096 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-12 22:46:04,096 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:46:04,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582870210] [2021-11-12 22:46:04,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582870210] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:46:04,096 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:46:04,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:46:04,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738379983] [2021-11-12 22:46:04,097 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:46:04,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:46:04,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:46:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:46:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:46:04,099 INFO L87 Difference]: Start difference. First operand 25504 states and 38252 transitions. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-12 22:46:07,495 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:46:08,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:46:08,705 INFO L93 Difference]: Finished difference Result 51266 states and 76923 transitions. [2021-11-12 22:46:08,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-12 22:46:08,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) Word has length 148 [2021-11-12 22:46:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:46:08,827 INFO L225 Difference]: With dead ends: 51266 [2021-11-12 22:46:08,827 INFO L226 Difference]: Without dead ends: 25750 [2021-11-12 22:46:08,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-11-12 22:46:08,913 INFO L933 BasicCegarLoop]: 4555 mSDtfsCounter, 278 mSDsluCounter, 27188 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 123 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2470.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 31743 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.70ms SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2541.31ms IncrementalHoareTripleChecker+Time [2021-11-12 22:46:08,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 31743 Invalid, 220 Unknown, 0 Unchecked, 30.70ms Time], IncrementalHoareTripleChecker [123 Valid, 96 Invalid, 1 Unknown, 0 Unchecked, 2541.31ms Time] [2021-11-12 22:46:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25750 states. [2021-11-12 22:46:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25750 to 25495. [2021-11-12 22:46:10,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25495 states, 19562 states have (on average 1.4340558225130355) internal successors, (28053), 19712 states have internal predecessors, (28053), 5075 states have call successors, (5075), 853 states have call predecessors, (5075), 857 states have return successors, (5091), 5044 states have call predecessors, (5091), 5067 states have call successors, (5091) [2021-11-12 22:46:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25495 states to 25495 states and 38219 transitions. [2021-11-12 22:46:10,768 INFO L78 Accepts]: Start accepts. Automaton has 25495 states and 38219 transitions. Word has length 148 [2021-11-12 22:46:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:46:10,769 INFO L470 AbstractCegarLoop]: Abstraction has 25495 states and 38219 transitions. [2021-11-12 22:46:10,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 6 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 6 states have call predecessors, (27), 6 states have call successors, (27) [2021-11-12 22:46:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 25495 states and 38219 transitions. [2021-11-12 22:46:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 22:46:10,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:46:10,840 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:46:10,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-12 22:46:11,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:46:11,064 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:46:11,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:46:11,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1948081364, now seen corresponding path program 1 times [2021-11-12 22:46:11,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:46:11,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742022509] [2021-11-12 22:46:11,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:46:11,070 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:46:11,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:46:11,070 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:46:11,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-12 22:46:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:46:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:46:18,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:46:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-12 22:46:20,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:46:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-12 22:46:21,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:46:21,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742022509] [2021-11-12 22:46:21,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742022509] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:46:21,902 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:46:21,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-12 22:46:21,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118414108] [2021-11-12 22:46:21,904 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:46:21,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:46:21,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:46:21,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:46:21,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:46:21,906 INFO L87 Difference]: Start difference. First operand 25495 states and 38219 transitions. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 4 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (50), 4 states have call predecessors, (50), 4 states have call successors, (50) [2021-11-12 22:46:25,821 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:46:38,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:46:38,857 INFO L93 Difference]: Finished difference Result 76963 states and 115237 transitions. [2021-11-12 22:46:38,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-12 22:46:38,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 4 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (50), 4 states have call predecessors, (50), 4 states have call successors, (50) Word has length 195 [2021-11-12 22:46:38,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:46:39,118 INFO L225 Difference]: With dead ends: 76963 [2021-11-12 22:46:39,118 INFO L226 Difference]: Without dead ends: 51438 [2021-11-12 22:46:39,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:46:39,222 INFO L933 BasicCegarLoop]: 5848 mSDtfsCounter, 8834 mSDsluCounter, 7128 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 785 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11942.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8834 SdHoareTripleChecker+Valid, 12976 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.26ms SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13513.96ms IncrementalHoareTripleChecker+Time [2021-11-12 22:46:39,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8834 Valid, 12976 Invalid, 1736 Unknown, 0 Unchecked, 43.26ms Time], IncrementalHoareTripleChecker [785 Valid, 950 Invalid, 1 Unknown, 0 Unchecked, 13513.96ms Time] [2021-11-12 22:46:39,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51438 states. [2021-11-12 22:46:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51438 to 36470. [2021-11-12 22:46:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36470 states, 28017 states have (on average 1.4338080451154656) internal successors, (40171), 28214 states have internal predecessors, (40171), 7161 states have call successors, (7161), 1283 states have call predecessors, (7161), 1291 states have return successors, (7182), 7119 states have call predecessors, (7182), 7153 states have call successors, (7182) [2021-11-12 22:46:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36470 states to 36470 states and 54514 transitions. [2021-11-12 22:46:42,138 INFO L78 Accepts]: Start accepts. Automaton has 36470 states and 54514 transitions. Word has length 195 [2021-11-12 22:46:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:46:42,138 INFO L470 AbstractCegarLoop]: Abstraction has 36470 states and 54514 transitions. [2021-11-12 22:46:42,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 states have internal predecessors, (217), 4 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (50), 4 states have call predecessors, (50), 4 states have call successors, (50) [2021-11-12 22:46:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 36470 states and 54514 transitions. [2021-11-12 22:46:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-12 22:46:42,215 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:46:42,216 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:46:42,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-11-12 22:46:42,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:46:42,440 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:46:42,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:46:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash -545446082, now seen corresponding path program 1 times [2021-11-12 22:46:42,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:46:42,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421708039] [2021-11-12 22:46:42,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:46:42,446 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:46:42,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:46:42,447 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:46:42,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 22:46:50,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:46:51,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 2225 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:46:51,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:46:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-12 22:46:52,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:46:53,993 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-12 22:46:53,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:46:53,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421708039] [2021-11-12 22:46:53,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421708039] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:46:53,993 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:46:53,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-12 22:46:53,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549908439] [2021-11-12 22:46:53,994 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:46:53,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-12 22:46:53,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:46:53,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-12 22:46:53,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-12 22:46:53,996 INFO L87 Difference]: Start difference. First operand 36470 states and 54514 transitions. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2021-11-12 22:46:56,030 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:46:58,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:47:03,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:47:03,940 INFO L93 Difference]: Finished difference Result 105973 states and 162218 transitions. [2021-11-12 22:47:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-12 22:47:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) Word has length 251 [2021-11-12 22:47:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:47:04,456 INFO L225 Difference]: With dead ends: 105973 [2021-11-12 22:47:04,456 INFO L226 Difference]: Without dead ends: 69563 [2021-11-12 22:47:04,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-12 22:47:04,595 INFO L933 BasicCegarLoop]: 7291 mSDtfsCounter, 4400 mSDsluCounter, 12505 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 405 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4567.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4804 SdHoareTripleChecker+Valid, 19796 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.42ms SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4736.08ms IncrementalHoareTripleChecker+Time [2021-11-12 22:47:04,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4804 Valid, 19796 Invalid, 416 Unknown, 0 Unchecked, 30.42ms Time], IncrementalHoareTripleChecker [405 Valid, 9 Invalid, 2 Unknown, 0 Unchecked, 4736.08ms Time] [2021-11-12 22:47:04,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69563 states. [2021-11-12 22:47:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69563 to 36522. [2021-11-12 22:47:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36522 states, 28069 states have (on average 1.4330043820584988) internal successors, (40223), 28266 states have internal predecessors, (40223), 7161 states have call successors, (7161), 1283 states have call predecessors, (7161), 1291 states have return successors, (7182), 7119 states have call predecessors, (7182), 7153 states have call successors, (7182) [2021-11-12 22:47:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36522 states to 36522 states and 54566 transitions. [2021-11-12 22:47:07,886 INFO L78 Accepts]: Start accepts. Automaton has 36522 states and 54566 transitions. Word has length 251 [2021-11-12 22:47:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:47:07,886 INFO L470 AbstractCegarLoop]: Abstraction has 36522 states and 54566 transitions. [2021-11-12 22:47:07,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 2 states have call successors, (62), 2 states have call predecessors, (62), 2 states have return successors, (60), 2 states have call predecessors, (60), 2 states have call successors, (60) [2021-11-12 22:47:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 36522 states and 54566 transitions. [2021-11-12 22:47:07,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2021-11-12 22:47:07,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:47:07,974 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 22:47:08,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-12 22:47:08,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:47:08,200 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:47:08,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:47:08,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2109512506, now seen corresponding path program 1 times [2021-11-12 22:47:08,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:47:08,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500117629] [2021-11-12 22:47:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:47:08,206 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:47:08,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:47:08,207 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:47:08,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-12 22:47:16,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:47:17,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 2231 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 22:47:17,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:47:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-11-12 22:47:19,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:47:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 22:47:21,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:47:21,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500117629] [2021-11-12 22:47:21,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500117629] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 22:47:21,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 22:47:21,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2021-11-12 22:47:21,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450460545] [2021-11-12 22:47:21,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 22:47:21,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:47:21,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:47:21,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:47:21,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:47:21,059 INFO L87 Difference]: Start difference. First operand 36522 states and 54566 transitions. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 5 states have internal predecessors, (166), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 22:47:23,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:47:28,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:47:28,748 INFO L93 Difference]: Finished difference Result 89128 states and 135879 transitions. [2021-11-12 22:47:28,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 22:47:28,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 5 states have internal predecessors, (166), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 255 [2021-11-12 22:47:28,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:47:29,020 INFO L225 Difference]: With dead ends: 89128 [2021-11-12 22:47:29,021 INFO L226 Difference]: Without dead ends: 58956 [2021-11-12 22:47:29,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:47:29,126 INFO L933 BasicCegarLoop]: 6366 mSDtfsCounter, 3785 mSDsluCounter, 23574 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 404 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2883.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3987 SdHoareTripleChecker+Valid, 29940 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.12ms SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3134.58ms IncrementalHoareTripleChecker+Time [2021-11-12 22:47:29,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3987 Valid, 29940 Invalid, 427 Unknown, 0 Unchecked, 40.12ms Time], IncrementalHoareTripleChecker [404 Valid, 22 Invalid, 1 Unknown, 0 Unchecked, 3134.58ms Time] [2021-11-12 22:47:29,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58956 states. [2021-11-12 22:47:31,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58956 to 36618. [2021-11-12 22:47:31,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36618 states, 28156 states have (on average 1.4316664298906094) internal successors, (40310), 28336 states have internal predecessors, (40310), 7161 states have call successors, (7161), 1283 states have call predecessors, (7161), 1300 states have return successors, (7252), 7145 states have call predecessors, (7252), 7153 states have call successors, (7252) [2021-11-12 22:47:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36618 states to 36618 states and 54723 transitions. [2021-11-12 22:47:32,020 INFO L78 Accepts]: Start accepts. Automaton has 36618 states and 54723 transitions. Word has length 255 [2021-11-12 22:47:32,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:47:32,021 INFO L470 AbstractCegarLoop]: Abstraction has 36618 states and 54723 transitions. [2021-11-12 22:47:32,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 5 states have internal predecessors, (166), 2 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-12 22:47:32,021 INFO L276 IsEmpty]: Start isEmpty. Operand 36618 states and 54723 transitions. [2021-11-12 22:47:32,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-12 22:47:32,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:47:32,080 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 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] [2021-11-12 22:47:32,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-11-12 22:47:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:47:32,281 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:47:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:47:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash -454159734, now seen corresponding path program 1 times [2021-11-12 22:47:32,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:47:32,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [849472481] [2021-11-12 22:47:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:47:32,285 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:47:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:47:32,286 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:47:32,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-12 22:47:39,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:47:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 2246 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-12 22:47:40,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:47:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-12 22:47:43,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:47:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-12 22:47:47,466 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:47:47,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [849472481] [2021-11-12 22:47:47,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [849472481] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:47:47,466 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:47:47,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-12 22:47:47,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672978218] [2021-11-12 22:47:47,467 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:47:47,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-12 22:47:47,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:47:47,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-12 22:47:47,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-12 22:47:47,468 INFO L87 Difference]: Start difference. First operand 36618 states and 54723 transitions. Second operand has 14 states, 14 states have (on average 17.5) internal successors, (245), 10 states have internal predecessors, (245), 4 states have call successors, (58), 3 states have call predecessors, (58), 7 states have return successors, (58), 8 states have call predecessors, (58), 4 states have call successors, (58) [2021-11-12 22:47:55,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:48:07,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:48:07,912 INFO L93 Difference]: Finished difference Result 80214 states and 120027 transitions. [2021-11-12 22:48:07,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 22:48:07,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.5) internal successors, (245), 10 states have internal predecessors, (245), 4 states have call successors, (58), 3 states have call predecessors, (58), 7 states have return successors, (58), 8 states have call predecessors, (58), 4 states have call successors, (58) Word has length 258 [2021-11-12 22:48:07,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:48:08,175 INFO L225 Difference]: With dead ends: 80214 [2021-11-12 22:48:08,175 INFO L226 Difference]: Without dead ends: 49994 [2021-11-12 22:48:08,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-11-12 22:48:08,290 INFO L933 BasicCegarLoop]: 5938 mSDtfsCounter, 7250 mSDsluCounter, 63518 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13359.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7267 SdHoareTripleChecker+Valid, 69456 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 116.12ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14345.04ms IncrementalHoareTripleChecker+Time [2021-11-12 22:48:08,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7267 Valid, 69456 Invalid, 1073 Unknown, 0 Unchecked, 116.12ms Time], IncrementalHoareTripleChecker [15 Valid, 1057 Invalid, 1 Unknown, 0 Unchecked, 14345.04ms Time] [2021-11-12 22:48:08,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49994 states. [2021-11-12 22:48:11,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49994 to 36666. [2021-11-12 22:48:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36666 states, 28198 states have (on average 1.4310234768423293) internal successors, (40352), 28366 states have internal predecessors, (40352), 7161 states have call successors, (7161), 1283 states have call predecessors, (7161), 1306 states have return successors, (7272), 7163 states have call predecessors, (7272), 7153 states have call successors, (7272) [2021-11-12 22:48:11,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36666 states to 36666 states and 54785 transitions. [2021-11-12 22:48:11,410 INFO L78 Accepts]: Start accepts. Automaton has 36666 states and 54785 transitions. Word has length 258 [2021-11-12 22:48:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:48:11,411 INFO L470 AbstractCegarLoop]: Abstraction has 36666 states and 54785 transitions. [2021-11-12 22:48:11,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.5) internal successors, (245), 10 states have internal predecessors, (245), 4 states have call successors, (58), 3 states have call predecessors, (58), 7 states have return successors, (58), 8 states have call predecessors, (58), 4 states have call successors, (58) [2021-11-12 22:48:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 36666 states and 54785 transitions. [2021-11-12 22:48:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-12 22:48:11,500 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:48:11,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:48:11,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-12 22:48:11,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:48:11,716 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:48:11,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:48:11,717 INFO L85 PathProgramCache]: Analyzing trace with hash 512559650, now seen corresponding path program 2 times [2021-11-12 22:48:11,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:48:11,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [623901138] [2021-11-12 22:48:11,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 22:48:11,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:48:11,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:48:11,723 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:48:11,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-12 22:48:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-12 22:48:18,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 22:48:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 22:48:18,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:48:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-12 22:48:20,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:48:21,325 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-12 22:48:21,326 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:48:21,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [623901138] [2021-11-12 22:48:21,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [623901138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:48:21,326 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:48:21,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-12 22:48:21,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564009955] [2021-11-12 22:48:21,327 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:48:21,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-12 22:48:21,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:48:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-12 22:48:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-12 22:48:21,328 INFO L87 Difference]: Start difference. First operand 36666 states and 54785 transitions. Second operand has 10 states, 10 states have (on average 16.8) internal successors, (168), 8 states have internal predecessors, (168), 2 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:48:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:48:27,989 INFO L93 Difference]: Finished difference Result 54156 states and 82068 transitions. [2021-11-12 22:48:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-12 22:48:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.8) internal successors, (168), 8 states have internal predecessors, (168), 2 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) Word has length 261 [2021-11-12 22:48:27,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:48:28,379 INFO L225 Difference]: With dead ends: 54156 [2021-11-12 22:48:28,379 INFO L226 Difference]: Without dead ends: 49572 [2021-11-12 22:48:28,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 513 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-12 22:48:28,410 INFO L933 BasicCegarLoop]: 6942 mSDtfsCounter, 3629 mSDsluCounter, 37289 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2222.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3769 SdHoareTripleChecker+Valid, 44231 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 52.50ms SdHoareTripleChecker+Time, 613 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2465.97ms IncrementalHoareTripleChecker+Time [2021-11-12 22:48:28,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3769 Valid, 44231 Invalid, 784 Unknown, 0 Unchecked, 52.50ms Time], IncrementalHoareTripleChecker [613 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 2465.97ms Time] [2021-11-12 22:48:28,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49572 states. [2021-11-12 22:48:31,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49572 to 36267. [2021-11-12 22:48:31,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36267 states, 27856 states have (on average 1.4292791499138426) internal successors, (39814), 28020 states have internal predecessors, (39814), 7108 states have call successors, (7108), 1279 states have call predecessors, (7108), 1302 states have return successors, (7220), 7114 states have call predecessors, (7220), 7101 states have call successors, (7220) [2021-11-12 22:48:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36267 states to 36267 states and 54142 transitions. [2021-11-12 22:48:31,704 INFO L78 Accepts]: Start accepts. Automaton has 36267 states and 54142 transitions. Word has length 261 [2021-11-12 22:48:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 22:48:31,705 INFO L470 AbstractCegarLoop]: Abstraction has 36267 states and 54142 transitions. [2021-11-12 22:48:31,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.8) internal successors, (168), 8 states have internal predecessors, (168), 2 states have call successors, (35), 2 states have call predecessors, (35), 4 states have return successors, (34), 4 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 22:48:31,705 INFO L276 IsEmpty]: Start isEmpty. Operand 36267 states and 54142 transitions. [2021-11-12 22:48:31,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-12 22:48:31,771 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 22:48:31,771 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 22:48:31,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-12 22:48:31,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 22:48:31,984 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 22:48:31,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 22:48:31,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1310669955, now seen corresponding path program 1 times [2021-11-12 22:48:31,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 22:48:31,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670579292] [2021-11-12 22:48:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 22:48:31,992 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 22:48:31,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 22:48:31,993 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 22:48:31,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b306436c-746d-44f3-973b-fd2accf9f538/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-12 22:48:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 22:48:40,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 2264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-12 22:48:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 22:48:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2021-11-12 22:48:44,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 22:48:46,029 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-12 22:48:46,029 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 22:48:46,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670579292] [2021-11-12 22:48:46,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670579292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 22:48:46,029 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 22:48:46,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 6 [2021-11-12 22:48:46,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37869406] [2021-11-12 22:48:46,030 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 22:48:46,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 22:48:46,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 22:48:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 22:48:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-12 22:48:46,032 INFO L87 Difference]: Start difference. First operand 36267 states and 54142 transitions. Second operand has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 4 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (64), 4 states have call predecessors, (64), 4 states have call successors, (64) [2021-11-12 22:48:48,306 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:48:50,322 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:09,350 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:11,257 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:14,021 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:16,041 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:18,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:20,116 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:22,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:24,122 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:26,160 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:28,179 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:30,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:32,220 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:34,869 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:36,888 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:49:52,029 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-12 22:50:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 22:50:41,748 INFO L93 Difference]: Finished difference Result 116700 states and 175866 transitions. [2021-11-12 22:50:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-12 22:50:41,749 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 45.0) internal successors, (270), 6 states have internal predecessors, (270), 4 states have call successors, (66), 3 states have call predecessors, (66), 3 states have return successors, (64), 4 states have call predecessors, (64), 4 states have call successors, (64) Word has length 262 [2021-11-12 22:50:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 22:50:42,298 INFO L225 Difference]: With dead ends: 116700 [2021-11-12 22:50:42,298 INFO L226 Difference]: Without dead ends: 86839 [2021-11-12 22:50:42,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 518 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-12 22:50:42,417 INFO L933 BasicCegarLoop]: 9187 mSDtfsCounter, 16215 mSDsluCounter, 20632 mSDsCounter, 0 mSdLazyCounter, 7873 mSolverCounterSat, 1805 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 103795.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16625 SdHoareTripleChecker+Valid, 29819 SdHoareTripleChecker+Invalid, 9692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 114.38ms SdHoareTripleChecker+Time, 1805 IncrementalHoareTripleChecker+Valid, 7873 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 107636.53ms IncrementalHoareTripleChecker+Time [2021-11-12 22:50:42,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16625 Valid, 29819 Invalid, 9692 Unknown, 0 Unchecked, 114.38ms Time], IncrementalHoareTripleChecker [1805 Valid, 7873 Invalid, 14 Unknown, 0 Unchecked, 107636.53ms Time] [2021-11-12 22:50:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86839 states.