./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.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_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/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_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/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_a56bd09a-efb3-40f6-8040-18562cf0db17/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 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:15:42,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:15:42,913 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:15:42,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:15:42,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:15:42,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:15:42,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:15:42,993 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:15:42,996 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:15:42,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:15:42,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:15:43,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:15:43,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:15:43,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:15:43,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:15:43,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:15:43,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:15:43,020 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:15:43,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:15:43,032 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:15:43,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:15:43,046 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:15:43,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:15:43,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:15:43,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:15:43,054 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:15:43,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:15:43,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:15:43,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:15:43,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:15:43,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:15:43,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:15:43,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:15:43,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:15:43,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:15:43,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:15:43,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:15:43,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:15:43,066 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:15:43,067 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:15:43,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:15:43,072 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-12 23:15:43,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:15:43,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:15:43,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:15:43,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:15:43,129 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:15:43,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:15:43,129 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:15:43,129 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-12 23:15:43,130 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:15:43,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:15:43,131 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-12 23:15:43,131 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-12 23:15:43,131 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:15:43,132 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-12 23:15:43,132 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-12 23:15:43,132 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-12 23:15:43,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:15:43,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-12 23:15:43,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:15:43,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:15:43,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:15:43,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:15:43,134 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:15:43,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:15:43,135 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:15:43,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:15:43,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:15:43,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:15:43,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:15:43,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:15:43,137 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:15:43,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:15:43,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-12 23:15:43,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-12 23:15:43,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:15:43,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:15:43,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:15:43,139 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_a56bd09a-efb3-40f6-8040-18562cf0db17/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad [2021-11-12 23:15:43,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:15:43,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:15:43,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:15:43,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:15:43,452 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:15:43,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2021-11-12 23:15:43,549 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data/e040eaa0d/6a7c8626e8c041889fa78db8880cf385/FLAG8ef86f2a5 [2021-11-12 23:15:44,466 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:15:44,470 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2021-11-12 23:15:44,517 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data/e040eaa0d/6a7c8626e8c041889fa78db8880cf385/FLAG8ef86f2a5 [2021-11-12 23:15:44,940 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data/e040eaa0d/6a7c8626e8c041889fa78db8880cf385 [2021-11-12 23:15:44,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:15:44,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:15:44,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:15:44,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:15:44,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:15:44,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:15:44" (1/1) ... [2021-11-12 23:15:44,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@149327e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:44, skipping insertion in model container [2021-11-12 23:15:44,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:15:44" (1/1) ... [2021-11-12 23:15:44,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:15:45,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:15:46,371 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 23:15:46,373 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 23:15:46,380 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 23:15:46,459 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 23:15:46,460 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 23:15:46,462 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 23:15:46,708 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 23:15:46,710 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 23:15:46,834 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_a56bd09a-efb3-40f6-8040-18562cf0db17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2021-11-12 23:15:46,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:15:46,927 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 23:15:46,927 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1dcf552d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:46, skipping insertion in model container [2021-11-12 23:15:46,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:15:46,928 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-12 23:15:46,932 INFO L158 Benchmark]: Toolchain (without parser) took 1984.55ms. Allocated memory was 111.1MB in the beginning and 151.0MB in the end (delta: 39.8MB). Free memory was 67.3MB in the beginning and 104.0MB in the end (delta: -36.7MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2021-11-12 23:15:46,933 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 111.1MB. Free memory was 81.2MB in the beginning and 81.2MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-12 23:15:46,935 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1981.09ms. Allocated memory was 111.1MB in the beginning and 151.0MB in the end (delta: 39.8MB). Free memory was 67.0MB in the beginning and 104.7MB in the end (delta: -37.7MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2021-11-12 23:15:46,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 111.1MB. Free memory was 81.2MB in the beginning and 81.2MB in the end (delta: 29.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1981.09ms. Allocated memory was 111.1MB in the beginning and 151.0MB in the end (delta: 39.8MB). Free memory was 67.0MB in the beginning and 104.7MB in the end (delta: -37.7MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 4415]: 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_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/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_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/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_a56bd09a-efb3-40f6-8040-18562cf0db17/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 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-12 23:15:49,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-12 23:15:49,668 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-12 23:15:49,710 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-12 23:15:49,711 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-12 23:15:49,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-12 23:15:49,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-12 23:15:49,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-12 23:15:49,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-12 23:15:49,722 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-12 23:15:49,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-12 23:15:49,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-12 23:15:49,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-12 23:15:49,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-12 23:15:49,731 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-12 23:15:49,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-12 23:15:49,734 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-12 23:15:49,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-12 23:15:49,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-12 23:15:49,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-12 23:15:49,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-12 23:15:49,755 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-12 23:15:49,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-12 23:15:49,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-12 23:15:49,765 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-12 23:15:49,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-12 23:15:49,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-12 23:15:49,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-12 23:15:49,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-12 23:15:49,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-12 23:15:49,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-12 23:15:49,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-12 23:15:49,785 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-12 23:15:49,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-12 23:15:49,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-12 23:15:49,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-12 23:15:49,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-12 23:15:49,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-12 23:15:49,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-12 23:15:49,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-12 23:15:49,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-12 23:15:49,796 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-12 23:15:49,852 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-12 23:15:49,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-12 23:15:49,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-12 23:15:49,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-12 23:15:49,855 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-12 23:15:49,855 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-12 23:15:49,855 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-12 23:15:49,856 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-12 23:15:49,856 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-12 23:15:49,856 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-12 23:15:49,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-12 23:15:49,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-12 23:15:49,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-12 23:15:49,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-12 23:15:49,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-12 23:15:49,861 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-12 23:15:49,861 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-12 23:15:49,861 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-12 23:15:49,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-12 23:15:49,862 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-12 23:15:49,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-12 23:15:49,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-12 23:15:49,863 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-12 23:15:49,863 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-12 23:15:49,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:15:49,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-12 23:15:49,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-12 23:15:49,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-12 23:15:49,864 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-12 23:15:49,865 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-12 23:15:49,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-12 23:15:49,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-12 23:15:49,865 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-12 23:15:49,866 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_a56bd09a-efb3-40f6-8040-18562cf0db17/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03d5d1a576959110e79c00ca2825754bce7439905d85699b470a90adbbee10ad [2021-11-12 23:15:50,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-12 23:15:50,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-12 23:15:50,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-12 23:15:50,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-12 23:15:50,363 INFO L275 PluginConnector]: CDTParser initialized [2021-11-12 23:15:50,365 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2021-11-12 23:15:50,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data/194e0bdf9/f1cacb484cc44dd5ac31a77716f00519/FLAGae3c4856c [2021-11-12 23:15:51,548 INFO L306 CDTParser]: Found 1 translation units. [2021-11-12 23:15:51,549 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2021-11-12 23:15:51,598 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data/194e0bdf9/f1cacb484cc44dd5ac31a77716f00519/FLAGae3c4856c [2021-11-12 23:15:51,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/data/194e0bdf9/f1cacb484cc44dd5ac31a77716f00519 [2021-11-12 23:15:51,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-12 23:15:51,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-12 23:15:51,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-12 23:15:51,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-12 23:15:51,931 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-12 23:15:51,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:15:51" (1/1) ... [2021-11-12 23:15:51,934 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63b7c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:51, skipping insertion in model container [2021-11-12 23:15:51,934 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 11:15:51" (1/1) ... [2021-11-12 23:15:51,943 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-12 23:15:52,089 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:15:53,739 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_a56bd09a-efb3-40f6-8040-18562cf0db17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2021-11-12 23:15:53,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:15:53,830 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-12 23:15:53,898 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-12 23:15:54,185 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_a56bd09a-efb3-40f6-8040-18562cf0db17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2021-11-12 23:15:54,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:15:54,216 INFO L203 MainTranslator]: Completed pre-run [2021-11-12 23:15:54,691 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_a56bd09a-efb3-40f6-8040-18562cf0db17/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i[164960,164973] [2021-11-12 23:15:54,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-12 23:15:54,819 INFO L208 MainTranslator]: Completed translation [2021-11-12 23:15:54,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54 WrapperNode [2021-11-12 23:15:54,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-12 23:15:54,822 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-12 23:15:54,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-12 23:15:54,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-12 23:15:54,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:54,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,066 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-12 23:15:55,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-12 23:15:55,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-12 23:15:55,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-12 23:15:55,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,298 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-12 23:15:55,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-12 23:15:55,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-12 23:15:55,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-12 23:15:55,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (1/1) ... [2021-11-12 23:15:55,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-12 23:15:55,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:15:55,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-12 23:15:55,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-12 23:15:55,412 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_lock_sync [2021-11-12 23:15:55,413 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_lock_sync [2021-11-12 23:15:55,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-12 23:15:55,413 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_free [2021-11-12 23:15:55,413 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_free [2021-11-12 23:15:55,413 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-12 23:15:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-12 23:15:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-12 23:15:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-12 23:15:55,414 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-12 23:15:55,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-12 23:15:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-12 23:15:55,415 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-12 23:15:55,415 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_release_lockspace [2021-11-12 23:15:55,415 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_release_lockspace [2021-11-12 23:15:55,416 INFO L130 BoogieDeclarations]: Found specification of procedure lock_comm [2021-11-12 23:15:55,416 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_comm [2021-11-12 23:15:55,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-12 23:15:55,416 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-12 23:15:55,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-12 23:15:55,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-12 23:15:55,417 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-12 23:15:55,417 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-12 23:15:55,417 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-12 23:15:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-12 23:15:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-12 23:15:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-12 23:15:55,418 INFO L130 BoogieDeclarations]: Found specification of procedure init_completion [2021-11-12 23:15:55,418 INFO L138 BoogieDeclarations]: Found implementation of procedure init_completion [2021-11-12 23:15:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-12 23:15:55,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-12 23:15:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-12 23:15:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-12 23:15:55,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-12 23:15:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-12 23:15:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-12 23:15:55,420 INFO L130 BoogieDeclarations]: Found specification of procedure md_wakeup_thread [2021-11-12 23:15:55,420 INFO L138 BoogieDeclarations]: Found implementation of procedure md_wakeup_thread [2021-11-12 23:15:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-12 23:15:55,421 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-12 23:15:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure bitmap_copy_from_slot [2021-11-12 23:15:55,421 INFO L138 BoogieDeclarations]: Found implementation of procedure bitmap_copy_from_slot [2021-11-12 23:15:55,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-12 23:15:55,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-12 23:15:55,422 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-12 23:15:55,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-12 23:15:55,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-12 23:15:55,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-12 23:15:55,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-12 23:15:55,423 INFO L130 BoogieDeclarations]: Found specification of procedure complete [2021-11-12 23:15:55,423 INFO L138 BoogieDeclarations]: Found implementation of procedure complete [2021-11-12 23:15:55,423 INFO L130 BoogieDeclarations]: Found specification of procedure md_register_thread [2021-11-12 23:15:55,424 INFO L138 BoogieDeclarations]: Found implementation of procedure md_register_thread [2021-11-12 23:15:55,424 INFO L130 BoogieDeclarations]: Found specification of procedure md_unregister_thread [2021-11-12 23:15:55,424 INFO L138 BoogieDeclarations]: Found implementation of procedure md_unregister_thread [2021-11-12 23:15:55,424 INFO L130 BoogieDeclarations]: Found specification of procedure wait_for_completion [2021-11-12 23:15:55,424 INFO L138 BoogieDeclarations]: Found implementation of procedure wait_for_completion [2021-11-12 23:15:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-12 23:15:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-12 23:15:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-12 23:15:55,425 INFO L130 BoogieDeclarations]: Found specification of procedure resync_send [2021-11-12 23:15:55,425 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_send [2021-11-12 23:15:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-12 23:15:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-12 23:15:55,426 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-12 23:15:55,426 INFO L130 BoogieDeclarations]: Found specification of procedure lockres_init [2021-11-12 23:15:55,427 INFO L138 BoogieDeclarations]: Found implementation of procedure lockres_init [2021-11-12 23:15:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-12 23:15:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure unlock_comm [2021-11-12 23:15:55,427 INFO L138 BoogieDeclarations]: Found implementation of procedure unlock_comm [2021-11-12 23:15:55,427 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-12 23:15:55,428 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-12 23:15:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-12 23:15:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-12 23:15:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-12 23:15:55,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-12 23:15:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure resync_info_update [2021-11-12 23:15:55,429 INFO L138 BoogieDeclarations]: Found implementation of procedure resync_info_update [2021-11-12 23:15:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-12 23:15:55,429 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-12 23:15:55,429 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-12 23:15:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure __sendmsg [2021-11-12 23:15:55,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __sendmsg [2021-11-12 23:15:55,430 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-12 23:15:55,430 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-12 23:15:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-12 23:15:55,431 INFO L130 BoogieDeclarations]: Found specification of procedure pretty_uuid [2021-11-12 23:15:55,431 INFO L138 BoogieDeclarations]: Found implementation of procedure pretty_uuid [2021-11-12 23:15:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-12 23:15:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-12 23:15:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure sendmsg [2021-11-12 23:15:55,432 INFO L138 BoogieDeclarations]: Found implementation of procedure sendmsg [2021-11-12 23:15:55,432 INFO L130 BoogieDeclarations]: Found specification of procedure dlm_unlock_sync [2021-11-12 23:15:55,433 INFO L138 BoogieDeclarations]: Found implementation of procedure dlm_unlock_sync [2021-11-12 23:15:58,359 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-12 23:16:14,537 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-12 23:16:14,538 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-12 23:16:14,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:16:14 BoogieIcfgContainer [2021-11-12 23:16:14,544 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-12 23:16:14,548 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-12 23:16:14,548 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-12 23:16:14,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-12 23:16:14,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 11:15:51" (1/3) ... [2021-11-12 23:16:14,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9349a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:16:14, skipping insertion in model container [2021-11-12 23:16:14,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 11:15:54" (2/3) ... [2021-11-12 23:16:14,554 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e9349a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 11:16:14, skipping insertion in model container [2021-11-12 23:16:14,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 11:16:14" (3/3) ... [2021-11-12 23:16:14,556 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--md--md-cluster.ko-entry_point.cil.out.i [2021-11-12 23:16:14,563 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-12 23:16:14,564 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-12 23:16:14,653 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-12 23:16:14,676 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 23:16:14,677 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-12 23:16:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand has 564 states, 395 states have (on average 1.3113924050632912) internal successors, (518), 406 states have internal predecessors, (518), 132 states have call successors, (132), 36 states have call predecessors, (132), 35 states have return successors, (128), 127 states have call predecessors, (128), 128 states have call successors, (128) [2021-11-12 23:16:14,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:16:14,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:14,770 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:14,771 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:14,784 INFO L85 PathProgramCache]: Analyzing trace with hash 108953653, now seen corresponding path program 1 times [2021-11-12 23:16:14,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:14,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311685251] [2021-11-12 23:16:14,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:14,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:14,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:14,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:14,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-12 23:16:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-12 23:16:16,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-11-12 23:16:17,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2021-11-12 23:16:17,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:17,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311685251] [2021-11-12 23:16:17,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311685251] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:17,709 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:16:17,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-12 23:16:17,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610428204] [2021-11-12 23:16:17,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:17,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-12 23:16:17,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:17,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-12 23:16:17,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:16:17,795 INFO L87 Difference]: Start difference. First operand has 564 states, 395 states have (on average 1.3113924050632912) internal successors, (518), 406 states have internal predecessors, (518), 132 states have call successors, (132), 36 states have call predecessors, (132), 35 states have return successors, (128), 127 states have call predecessors, (128), 128 states have call successors, (128) Second operand has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 23:16:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:17,976 INFO L93 Difference]: Finished difference Result 1123 states and 1576 transitions. [2021-11-12 23:16:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-12 23:16:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 184 [2021-11-12 23:16:17,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:18,020 INFO L225 Difference]: With dead ends: 1123 [2021-11-12 23:16:18,021 INFO L226 Difference]: Without dead ends: 553 [2021-11-12 23:16:18,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-12 23:16:18,048 INFO L933 BasicCegarLoop]: 773 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.97ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:18,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 14.97ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-12 23:16:18,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-12 23:16:18,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 553. [2021-11-12 23:16:18,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 390 states have (on average 1.2974358974358975) internal successors, (506), 395 states have internal predecessors, (506), 128 states have call successors, (128), 35 states have call predecessors, (128), 34 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2021-11-12 23:16:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 760 transitions. [2021-11-12 23:16:18,219 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 760 transitions. Word has length 184 [2021-11-12 23:16:18,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:18,220 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 760 transitions. [2021-11-12 23:16:18,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.5) internal successors, (53), 2 states have internal predecessors, (53), 2 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-12 23:16:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 760 transitions. [2021-11-12 23:16:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-12 23:16:18,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:18,234 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:18,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:18,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:18,450 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 825195323, now seen corresponding path program 1 times [2021-11-12 23:16:18,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:18,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267197791] [2021-11-12 23:16:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:18,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:18,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:18,457 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:18,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-12 23:16:19,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:19,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 1006 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:16:19,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2021-11-12 23:16:20,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 537 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 467 trivial. 0 not checked. [2021-11-12 23:16:21,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:21,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267197791] [2021-11-12 23:16:21,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267197791] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-12 23:16:21,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-12 23:16:21,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2021-11-12 23:16:21,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124911095] [2021-11-12 23:16:21,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:21,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-12 23:16:21,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:21,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-12 23:16:21,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-12 23:16:21,389 INFO L87 Difference]: Start difference. First operand 553 states and 760 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:16:22,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:22,032 INFO L93 Difference]: Finished difference Result 1102 states and 1528 transitions. [2021-11-12 23:16:22,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:16:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 184 [2021-11-12 23:16:22,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:22,044 INFO L225 Difference]: With dead ends: 1102 [2021-11-12 23:16:22,044 INFO L226 Difference]: Without dead ends: 554 [2021-11-12 23:16:22,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:16:22,056 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 6 mSDsluCounter, 2951 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 384.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3697 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.71ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 459.79ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:22,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 3697 Invalid, 113 Unknown, 0 Unchecked, 37.71ms Time], IncrementalHoareTripleChecker [15 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 459.79ms Time] [2021-11-12 23:16:22,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2021-11-12 23:16:22,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2021-11-12 23:16:22,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 391 states have (on average 1.2966751918158568) internal successors, (507), 396 states have internal predecessors, (507), 128 states have call successors, (128), 35 states have call predecessors, (128), 34 states have return successors, (126), 125 states have call predecessors, (126), 126 states have call successors, (126) [2021-11-12 23:16:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 761 transitions. [2021-11-12 23:16:22,149 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 761 transitions. Word has length 184 [2021-11-12 23:16:22,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:22,151 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 761 transitions. [2021-11-12 23:16:22,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-12 23:16:22,151 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 761 transitions. [2021-11-12 23:16:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-12 23:16:22,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:22,164 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:22,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:22,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:16:22,378 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:22,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:22,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1400350510, now seen corresponding path program 1 times [2021-11-12 23:16:22,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:22,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780274758] [2021-11-12 23:16:22,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:22,381 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:22,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:22,385 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:22,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-12 23:16:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:23,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:16:23,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 226 proven. 1 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2021-11-12 23:16:24,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2021-11-12 23:16:25,642 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:25,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780274758] [2021-11-12 23:16:25,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780274758] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:25,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2042878092] [2021-11-12 23:16:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:25,643 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:25,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:16:25,646 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:16:25,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-12 23:16:26,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:26,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 1061 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:16:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-12 23:16:28,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:28,794 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-12 23:16:28,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2042878092] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:28,794 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:16:28,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:16:28,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62762846] [2021-11-12 23:16:28,795 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:28,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:16:28,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:28,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:16:28,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:16:28,797 INFO L87 Difference]: Start difference. First operand 554 states and 761 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 23:16:28,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:28,908 INFO L93 Difference]: Finished difference Result 1588 states and 2182 transitions. [2021-11-12 23:16:28,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:16:28,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) Word has length 195 [2021-11-12 23:16:28,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:28,925 INFO L225 Difference]: With dead ends: 1588 [2021-11-12 23:16:28,925 INFO L226 Difference]: Without dead ends: 1066 [2021-11-12 23:16:28,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 766 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:16:28,933 INFO L933 BasicCegarLoop]: 1067 mSDtfsCounter, 679 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 1772 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.40ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.82ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:28,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 1772 Invalid, 8 Unknown, 0 Unchecked, 13.40ms Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 19.82ms Time] [2021-11-12 23:16:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-11-12 23:16:29,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1063. [2021-11-12 23:16:29,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 756 states have (on average 1.302910052910053) internal successors, (985), 765 states have internal predecessors, (985), 239 states have call successors, (239), 68 states have call predecessors, (239), 67 states have return successors, (237), 235 states have call predecessors, (237), 237 states have call successors, (237) [2021-11-12 23:16:29,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1461 transitions. [2021-11-12 23:16:29,050 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1461 transitions. Word has length 195 [2021-11-12 23:16:29,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:29,054 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 1461 transitions. [2021-11-12 23:16:29,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (34), 2 states have call predecessors, (34), 2 states have call successors, (34) [2021-11-12 23:16:29,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1461 transitions. [2021-11-12 23:16:29,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2021-11-12 23:16:29,062 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:29,063 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-12 23:16:29,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:29,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-12 23:16:29,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:29,479 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:29,479 INFO L85 PathProgramCache]: Analyzing trace with hash 286055935, now seen corresponding path program 1 times [2021-11-12 23:16:29,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:29,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [863826096] [2021-11-12 23:16:29,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:29,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:29,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:29,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:29,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-12 23:16:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:30,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:16:30,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 226 proven. 1 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2021-11-12 23:16:31,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 614 trivial. 0 not checked. [2021-11-12 23:16:32,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:32,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [863826096] [2021-11-12 23:16:32,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [863826096] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:32,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1838486578] [2021-11-12 23:16:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:32,662 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:16:32,664 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:16:32,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-12 23:16:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:33,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:16:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-12 23:16:33,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-12 23:16:34,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1838486578] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:34,521 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:16:34,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:16:34,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806945392] [2021-11-12 23:16:34,522 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:34,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:16:34,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:34,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:16:34,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:16:34,523 INFO L87 Difference]: Start difference. First operand 1063 states and 1461 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-12 23:16:35,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:35,654 INFO L93 Difference]: Finished difference Result 2256 states and 3079 transitions. [2021-11-12 23:16:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:16:35,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) Word has length 217 [2021-11-12 23:16:35,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:35,697 INFO L225 Difference]: With dead ends: 2256 [2021-11-12 23:16:35,697 INFO L226 Difference]: Without dead ends: 1229 [2021-11-12 23:16:35,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 864 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:16:35,703 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 153 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 951.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.58ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1046.66ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:35,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 1438 Invalid, 50 Unknown, 0 Unchecked, 6.58ms Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 1046.66ms Time] [2021-11-12 23:16:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-11-12 23:16:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1218. [2021-11-12 23:16:35,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 876 states have (on average 1.3059360730593608) internal successors, (1144), 887 states have internal predecessors, (1144), 257 states have call successors, (257), 85 states have call predecessors, (257), 84 states have return successors, (255), 251 states have call predecessors, (255), 255 states have call successors, (255) [2021-11-12 23:16:35,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 1656 transitions. [2021-11-12 23:16:35,785 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 1656 transitions. Word has length 217 [2021-11-12 23:16:35,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:35,786 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 1656 transitions. [2021-11-12 23:16:35,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 1 states have call predecessors, (17), 1 states have call successors, (17) [2021-11-12 23:16:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 1656 transitions. [2021-11-12 23:16:35,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-12 23:16:35,796 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:35,797 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:35,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:36,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:36,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:36,214 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:36,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1280048405, now seen corresponding path program 1 times [2021-11-12 23:16:36,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:36,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647672467] [2021-11-12 23:16:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:36,217 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:36,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:36,222 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:36,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-12 23:16:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:37,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:16:37,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 352 proven. 1 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-12 23:16:38,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2021-11-12 23:16:39,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:39,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647672467] [2021-11-12 23:16:39,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647672467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:39,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [138614588] [2021-11-12 23:16:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:39,642 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:39,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:16:39,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:16:39,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-12 23:16:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-12 23:16:40,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-11-12 23:16:41,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 883 trivial. 0 not checked. [2021-11-12 23:16:41,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [138614588] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:16:41,751 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-12 23:16:41,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7, 7] total 12 [2021-11-12 23:16:41,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361461605] [2021-11-12 23:16:41,753 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:16:41,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-12 23:16:41,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:41,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-12 23:16:41,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:16:41,755 INFO L87 Difference]: Start difference. First operand 1218 states and 1656 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 23:16:41,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:41,917 INFO L93 Difference]: Finished difference Result 2856 states and 3976 transitions. [2021-11-12 23:16:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-12 23:16:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 278 [2021-11-12 23:16:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:41,937 INFO L225 Difference]: With dead ends: 2856 [2021-11-12 23:16:41,937 INFO L226 Difference]: Without dead ends: 1679 [2021-11-12 23:16:41,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1098 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-11-12 23:16:41,946 INFO L933 BasicCegarLoop]: 1032 mSDtfsCounter, 311 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.51ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 58.93ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:41,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 1694 Invalid, 6 Unknown, 0 Unchecked, 7.51ms Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 58.93ms Time] [2021-11-12 23:16:41,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2021-11-12 23:16:42,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1220. [2021-11-12 23:16:42,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 878 states have (on average 1.3052391799544418) internal successors, (1146), 889 states have internal predecessors, (1146), 257 states have call successors, (257), 85 states have call predecessors, (257), 84 states have return successors, (255), 251 states have call predecessors, (255), 255 states have call successors, (255) [2021-11-12 23:16:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 1658 transitions. [2021-11-12 23:16:42,048 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 1658 transitions. Word has length 278 [2021-11-12 23:16:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:42,049 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 1658 transitions. [2021-11-12 23:16:42,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 23:16:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 1658 transitions. [2021-11-12 23:16:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-11-12 23:16:42,058 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:42,058 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:42,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:42,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:42,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:42,482 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:42,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:42,483 INFO L85 PathProgramCache]: Analyzing trace with hash 184727, now seen corresponding path program 1 times [2021-11-12 23:16:42,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:42,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580352343] [2021-11-12 23:16:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:42,484 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:42,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:42,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:42,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-12 23:16:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:43,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:16:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 352 proven. 1 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-12 23:16:44,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:45,721 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2021-11-12 23:16:45,721 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:16:45,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580352343] [2021-11-12 23:16:45,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580352343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:45,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1843709764] [2021-11-12 23:16:45,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:45,722 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:45,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:16:45,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:16:45,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-12 23:16:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:47,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:16:47,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 352 proven. 1 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-12 23:16:48,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2021-11-12 23:16:49,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1843709764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:49,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943252333] [2021-11-12 23:16:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:16:49,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:16:49,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:16:49,481 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:16:49,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-12 23:16:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:16:50,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 1295 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-12 23:16:50,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:16:51,085 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 352 proven. 1 refuted. 0 times theorem prover too weak. 537 trivial. 0 not checked. [2021-11-12 23:16:51,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:16:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 10 proven. 91 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2021-11-12 23:16:52,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943252333] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:16:52,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:16:52,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 11 [2021-11-12 23:16:52,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789589832] [2021-11-12 23:16:52,143 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:16:52,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-12 23:16:52,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:16:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-12 23:16:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-11-12 23:16:52,146 INFO L87 Difference]: Start difference. First operand 1220 states and 1658 transitions. Second operand has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 11 states have internal predecessors, (106), 4 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 23:16:52,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:16:52,954 INFO L93 Difference]: Finished difference Result 2452 states and 3349 transitions. [2021-11-12 23:16:52,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-12 23:16:52,955 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 11 states have internal predecessors, (106), 4 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) Word has length 278 [2021-11-12 23:16:52,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:16:52,967 INFO L225 Difference]: With dead ends: 2452 [2021-11-12 23:16:52,968 INFO L226 Difference]: Without dead ends: 1238 [2021-11-12 23:16:52,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1666 GetRequests, 1653 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-12 23:16:52,977 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 19 mSDsluCounter, 2220 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 493.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2966 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.89ms SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 555.78ms IncrementalHoareTripleChecker+Time [2021-11-12 23:16:52,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2966 Invalid, 144 Unknown, 0 Unchecked, 11.89ms Time], IncrementalHoareTripleChecker [39 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 555.78ms Time] [2021-11-12 23:16:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-11-12 23:16:53,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1238. [2021-11-12 23:16:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 891 states have (on average 1.3019079685746353) internal successors, (1160), 902 states have internal predecessors, (1160), 259 states have call successors, (259), 88 states have call predecessors, (259), 87 states have return successors, (257), 253 states have call predecessors, (257), 257 states have call successors, (257) [2021-11-12 23:16:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 1676 transitions. [2021-11-12 23:16:53,062 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 1676 transitions. Word has length 278 [2021-11-12 23:16:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:16:53,064 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 1676 transitions. [2021-11-12 23:16:53,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 11.777777777777779) internal successors, (106), 11 states have internal predecessors, (106), 4 states have call successors, (38), 2 states have call predecessors, (38), 5 states have return successors, (38), 4 states have call predecessors, (38), 4 states have call successors, (38) [2021-11-12 23:16:53,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 1676 transitions. [2021-11-12 23:16:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-11-12 23:16:53,071 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:16:53,072 INFO L514 BasicCegarLoop]: trace histogram [21, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:16:53,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:53,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:53,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-12 23:16:53,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt [2021-11-12 23:16:53,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:16:53,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:16:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1672912025, now seen corresponding path program 2 times [2021-11-12 23:16:53,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:16:53,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742883030] [2021-11-12 23:16:53,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:16:53,693 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:16:53,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:16:53,695 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:16:53,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-12 23:18:02,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:18:02,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:18:03,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:18:03,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:18:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 417 proven. 3 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2021-11-12 23:18:04,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:18:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 12 proven. 138 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2021-11-12 23:18:05,567 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:18:05,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742883030] [2021-11-12 23:18:05,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742883030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:18:05,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [753759516] [2021-11-12 23:18:05,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:18:05,568 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:18:05,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:18:05,574 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:18:05,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-12 23:22:36,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:22:36,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:22:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-12 23:22:37,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:22:38,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 417 proven. 3 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2021-11-12 23:22:38,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:22:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 12 proven. 138 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2021-11-12 23:22:39,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [753759516] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:22:39,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955565384] [2021-11-12 23:22:39,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:22:39,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:22:39,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:22:39,432 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:22:39,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-12 23:25:01,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:25:01,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:25:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1345 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:25:02,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:25:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 417 proven. 3 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2021-11-12 23:25:02,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:25:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 12 proven. 138 refuted. 0 times theorem prover too weak. 1005 trivial. 0 not checked. [2021-11-12 23:25:04,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955565384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:25:04,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:25:04,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 20 [2021-11-12 23:25:04,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782194103] [2021-11-12 23:25:04,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:25:04,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-12 23:25:04,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:25:04,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-12 23:25:04,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-11-12 23:25:04,653 INFO L87 Difference]: Start difference. First operand 1238 states and 1676 transitions. Second operand has 20 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 20 states have internal predecessors, (118), 5 states have call successors, (39), 2 states have call predecessors, (39), 7 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) [2021-11-12 23:25:06,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:25:06,759 INFO L93 Difference]: Finished difference Result 2471 states and 3362 transitions. [2021-11-12 23:25:06,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-12 23:25:06,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 20 states have internal predecessors, (118), 5 states have call successors, (39), 2 states have call predecessors, (39), 7 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) Word has length 288 [2021-11-12 23:25:06,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:25:06,772 INFO L225 Difference]: With dead ends: 2471 [2021-11-12 23:25:06,772 INFO L226 Difference]: Without dead ends: 1241 [2021-11-12 23:25:06,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1728 GetRequests, 1704 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-11-12 23:25:06,779 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 33 mSDsluCounter, 7358 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1461.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 8101 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.78ms SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1639.23ms IncrementalHoareTripleChecker+Time [2021-11-12 23:25:06,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 8101 Invalid, 374 Unknown, 0 Unchecked, 21.78ms Time], IncrementalHoareTripleChecker [48 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 1639.23ms Time] [2021-11-12 23:25:06,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-11-12 23:25:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1241. [2021-11-12 23:25:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 894 states have (on average 1.3008948545861299) internal successors, (1163), 905 states have internal predecessors, (1163), 259 states have call successors, (259), 88 states have call predecessors, (259), 87 states have return successors, (257), 253 states have call predecessors, (257), 257 states have call successors, (257) [2021-11-12 23:25:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1679 transitions. [2021-11-12 23:25:06,852 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1679 transitions. Word has length 288 [2021-11-12 23:25:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:25:06,856 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 1679 transitions. [2021-11-12 23:25:06,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 6.9411764705882355) internal successors, (118), 20 states have internal predecessors, (118), 5 states have call successors, (39), 2 states have call predecessors, (39), 7 states have return successors, (41), 5 states have call predecessors, (41), 5 states have call successors, (41) [2021-11-12 23:25:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1679 transitions. [2021-11-12 23:25:06,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2021-11-12 23:25:06,865 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:25:06,866 INFO L514 BasicCegarLoop]: trace histogram [31, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:25:06,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:07,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:07,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-12 23:25:07,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:25:07,479 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:25:07,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:25:07,480 INFO L85 PathProgramCache]: Analyzing trace with hash 830400919, now seen corresponding path program 3 times [2021-11-12 23:25:07,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:25:07,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297198029] [2021-11-12 23:25:07,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-12 23:25:07,481 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:25:07,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:25:07,482 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:25:07,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-12 23:26:22,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-12 23:26:22,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:26:23,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-12 23:26:23,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:23,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1513 trivial. 0 not checked. [2021-11-12 23:26:23,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1513 trivial. 0 not checked. [2021-11-12 23:26:24,334 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:24,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297198029] [2021-11-12 23:26:24,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297198029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-12 23:26:24,334 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-12 23:26:24,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-12 23:26:24,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286018723] [2021-11-12 23:26:24,334 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-12 23:26:24,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-12 23:26:24,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:24,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-12 23:26:24,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-12 23:26:24,336 INFO L87 Difference]: Start difference. First operand 1241 states and 1679 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 23:26:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:25,540 INFO L93 Difference]: Finished difference Result 2862 states and 4084 transitions. [2021-11-12 23:26:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-12 23:26:25,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 298 [2021-11-12 23:26:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:25,579 INFO L225 Difference]: With dead ends: 2862 [2021-11-12 23:26:25,579 INFO L226 Difference]: Without dead ends: 2266 [2021-11-12 23:26:25,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 589 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-11-12 23:26:25,585 INFO L933 BasicCegarLoop]: 1160 mSDtfsCounter, 1874 mSDsluCounter, 4496 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 845.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1952 SdHoareTripleChecker+Valid, 5656 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.15ms SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 996.14ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:25,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1952 Valid, 5656 Invalid, 491 Unknown, 0 Unchecked, 19.15ms Time], IncrementalHoareTripleChecker [391 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 996.14ms Time] [2021-11-12 23:26:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2266 states. [2021-11-12 23:26:25,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2266 to 1244. [2021-11-12 23:26:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 897 states have (on average 1.2998885172798216) internal successors, (1166), 908 states have internal predecessors, (1166), 259 states have call successors, (259), 88 states have call predecessors, (259), 87 states have return successors, (257), 253 states have call predecessors, (257), 257 states have call successors, (257) [2021-11-12 23:26:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 1682 transitions. [2021-11-12 23:26:25,723 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 1682 transitions. Word has length 298 [2021-11-12 23:26:25,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:25,724 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 1682 transitions. [2021-11-12 23:26:25,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-12 23:26:25,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 1682 transitions. [2021-11-12 23:26:25,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2021-11-12 23:26:25,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:25,733 INFO L514 BasicCegarLoop]: trace histogram [31, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:25,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:25,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:25,951 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:25,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:25,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1729942178, now seen corresponding path program 1 times [2021-11-12 23:26:25,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:25,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717128280] [2021-11-12 23:26:25,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:25,954 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:25,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:25,954 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:25,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-12 23:26:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:27,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:26:27,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 500 proven. 6 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2021-11-12 23:26:28,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 14 proven. 204 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-11-12 23:26:29,879 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:26:29,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717128280] [2021-11-12 23:26:29,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717128280] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:29,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1501536764] [2021-11-12 23:26:29,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:29,879 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:26:29,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:26:29,881 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:26:29,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-12 23:26:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:31,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-12 23:26:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 500 proven. 6 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2021-11-12 23:26:32,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 14 proven. 204 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-11-12 23:26:33,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1501536764] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:33,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28401508] [2021-11-12 23:26:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-12 23:26:33,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-12 23:26:33,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 [2021-11-12 23:26:33,678 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-12 23:26:33,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-12 23:26:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-12 23:26:34,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:26:34,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:26:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 500 proven. 6 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2021-11-12 23:26:35,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:26:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 14 proven. 204 refuted. 0 times theorem prover too weak. 1302 trivial. 0 not checked. [2021-11-12 23:26:37,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28401508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:26:37,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-12 23:26:37,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 23 [2021-11-12 23:26:37,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090251408] [2021-11-12 23:26:37,314 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-12 23:26:37,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-12 23:26:37,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-12 23:26:37,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-12 23:26:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-11-12 23:26:37,318 INFO L87 Difference]: Start difference. First operand 1244 states and 1682 transitions. Second operand has 23 states, 20 states have (on average 6.95) internal successors, (139), 23 states have internal predecessors, (139), 5 states have call successors, (43), 2 states have call predecessors, (43), 7 states have return successors, (45), 5 states have call predecessors, (45), 5 states have call successors, (45) [2021-11-12 23:26:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-12 23:26:39,810 INFO L93 Difference]: Finished difference Result 2483 states and 3374 transitions. [2021-11-12 23:26:39,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-12 23:26:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 6.95) internal successors, (139), 23 states have internal predecessors, (139), 5 states have call successors, (43), 2 states have call predecessors, (43), 7 states have return successors, (45), 5 states have call predecessors, (45), 5 states have call successors, (45) Word has length 312 [2021-11-12 23:26:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-12 23:26:39,830 INFO L225 Difference]: With dead ends: 2483 [2021-11-12 23:26:39,830 INFO L226 Difference]: Without dead ends: 1247 [2021-11-12 23:26:39,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1873 GetRequests, 1845 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-11-12 23:26:39,839 INFO L933 BasicCegarLoop]: 743 mSDtfsCounter, 43 mSDsluCounter, 6619 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1693.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 7362 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.20ms SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1882.69ms IncrementalHoareTripleChecker+Time [2021-11-12 23:26:39,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 7362 Invalid, 394 Unknown, 0 Unchecked, 18.20ms Time], IncrementalHoareTripleChecker [53 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 1882.69ms Time] [2021-11-12 23:26:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2021-11-12 23:26:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1247. [2021-11-12 23:26:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1247 states, 900 states have (on average 1.298888888888889) internal successors, (1169), 911 states have internal predecessors, (1169), 259 states have call successors, (259), 88 states have call predecessors, (259), 87 states have return successors, (257), 253 states have call predecessors, (257), 257 states have call successors, (257) [2021-11-12 23:26:39,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1247 states to 1247 states and 1685 transitions. [2021-11-12 23:26:39,922 INFO L78 Accepts]: Start accepts. Automaton has 1247 states and 1685 transitions. Word has length 312 [2021-11-12 23:26:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-12 23:26:39,923 INFO L470 AbstractCegarLoop]: Abstraction has 1247 states and 1685 transitions. [2021-11-12 23:26:39,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 6.95) internal successors, (139), 23 states have internal predecessors, (139), 5 states have call successors, (43), 2 states have call predecessors, (43), 7 states have return successors, (45), 5 states have call predecessors, (45), 5 states have call successors, (45) [2021-11-12 23:26:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1247 states and 1685 transitions. [2021-11-12 23:26:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-11-12 23:26:39,929 INFO L506 BasicCegarLoop]: Found error trace [2021-11-12 23:26:39,929 INFO L514 BasicCegarLoop]: trace histogram [41, 11, 11, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-12 23:26:39,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:40,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-12 23:26:40,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-12 23:26:40,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-12 23:26:40,545 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-12 23:26:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-12 23:26:40,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1494093216, now seen corresponding path program 2 times [2021-11-12 23:26:40,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-12 23:26:40,547 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1854159003] [2021-11-12 23:26:40,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:26:40,547 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-12 23:26:40,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat [2021-11-12 23:26:40,548 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-12 23:26:40,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-12 23:27:55,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-12 23:27:55,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-12 23:27:55,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1492 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-12 23:27:55,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-12 23:27:56,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 601 proven. 10 refuted. 0 times theorem prover too weak. 1374 trivial. 0 not checked. [2021-11-12 23:27:56,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-12 23:27:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 16 proven. 289 refuted. 0 times theorem prover too weak. 1680 trivial. 0 not checked. [2021-11-12 23:27:58,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-12 23:27:58,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1854159003] [2021-11-12 23:27:58,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1854159003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-12 23:27:58,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396114384] [2021-11-12 23:27:58,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-12 23:27:58,573 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-12 23:27:58,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 [2021-11-12 23:27:58,575 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-12 23:27:58,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a56bd09a-efb3-40f6-8040-18562cf0db17/bin/utaipan-vmNK8stdcF/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process