./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8 --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 a49fa2cb2318ea112688f7105056cfdc1f55c42e8f926c44139a3fa1f7774bac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:16:26,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:16:26,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:16:26,482 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:16:26,483 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:16:26,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:16:26,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:16:26,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:16:26,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:16:26,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:16:26,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:16:26,500 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:16:26,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:16:26,503 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:16:26,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:16:26,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:16:26,509 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:16:26,511 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:16:26,514 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:16:26,517 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:16:26,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:16:26,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:16:26,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:16:26,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:16:26,541 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:16:26,547 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:16:26,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:16:26,549 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:16:26,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:16:26,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:16:26,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:16:26,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:16:26,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:16:26,561 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:16:26,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:16:26,563 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:16:26,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:16:26,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:16:26,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:16:26,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:16:26,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:16:26,569 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:16:26,624 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:16:26,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:16:26,625 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:16:26,626 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:16:26,626 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:16:26,626 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:16:26,627 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:16:26,627 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:16:26,627 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:16:26,628 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:16:26,628 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:16:26,628 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:16:26,629 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:16:26,629 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:16:26,629 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:16:26,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:16:26,631 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:16:26,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:16:26,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:16:26,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:16:26,632 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:16:26,632 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:16:26,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:16:26,633 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:16:26,633 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:16:26,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:16:26,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:16:26,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:26,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:16:26,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:16:26,635 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:16:26,635 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:16:26,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:16:26,636 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:16:26,636 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:16:26,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:16:26,637 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_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa2cb2318ea112688f7105056cfdc1f55c42e8f926c44139a3fa1f7774bac [2021-11-07 02:16:26,983 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:16:27,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:16:27,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:16:27,025 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:16:27,026 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:16:27,027 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i [2021-11-07 02:16:27,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data/2780a2a0c/a2cef63900ff441383382006c8e03fb8/FLAG34e752014 [2021-11-07 02:16:28,615 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:16:28,617 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i [2021-11-07 02:16:28,728 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data/2780a2a0c/a2cef63900ff441383382006c8e03fb8/FLAG34e752014 [2021-11-07 02:16:29,148 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data/2780a2a0c/a2cef63900ff441383382006c8e03fb8 [2021-11-07 02:16:29,152 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:16:29,154 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:16:29,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:29,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:16:29,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:16:29,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:29" (1/1) ... [2021-11-07 02:16:29,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a01889b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:29, skipping insertion in model container [2021-11-07 02:16:29,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:29" (1/1) ... [2021-11-07 02:16:29,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:16:29,439 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:30,990 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_07f9031a-3368-4763-be7c-feb20fb4d78e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i[174455,174468] [2021-11-07 02:16:31,264 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,223 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,626 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,645 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,646 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,655 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,656 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,682 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,682 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,743 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,744 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,747 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,750 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,759 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,760 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,761 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,803 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:32,811 WARN L563 CHandler]: More than one settings change for restart is not yet implemented; using only the first one to be reported [2021-11-07 02:16:34,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:34,322 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) [2021-11-07 02:16:34,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4228ec55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:34, skipping insertion in model container [2021-11-07 02:16:34,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:34,326 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:16:34,330 INFO L168 Benchmark]: Toolchain (without parser) took 5172.67 ms. Allocated memory was 92.3 MB in the beginning and 163.6 MB in the end (delta: 71.3 MB). Free memory was 55.9 MB in the beginning and 105.0 MB in the end (delta: -49.0 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:16:34,333 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 92.3 MB. Free memory was 65.1 MB in the beginning and 65.1 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:16:34,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 5167.18 ms. Allocated memory was 92.3 MB in the beginning and 163.6 MB in the end (delta: 71.3 MB). Free memory was 55.9 MB in the beginning and 105.0 MB in the end (delta: -49.0 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:16:34,338 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 92.3 MB. Free memory was 65.1 MB in the beginning and 65.1 MB in the end (delta: 27.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 5167.18 ms. Allocated memory was 92.3 MB in the beginning and 163.6 MB in the end (delta: 71.3 MB). Free memory was 55.9 MB in the beginning and 105.0 MB in the end (delta: -49.0 MB). Peak memory consumption was 80.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6010]: 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_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8 --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 a49fa2cb2318ea112688f7105056cfdc1f55c42e8f926c44139a3fa1f7774bac --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:16:37,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:16:37,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:16:37,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:16:37,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:16:37,250 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:16:37,253 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:16:37,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:16:37,259 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:16:37,261 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:16:37,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:16:37,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:16:37,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:16:37,268 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:16:37,270 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:16:37,272 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:16:37,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:16:37,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:16:37,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:16:37,282 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:16:37,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:16:37,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:16:37,289 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:16:37,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:16:37,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:16:37,296 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:16:37,297 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:16:37,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:16:37,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:16:37,301 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:16:37,302 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:16:37,304 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:16:37,305 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:16:37,306 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:16:37,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:16:37,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:16:37,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:16:37,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:16:37,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:16:37,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:16:37,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:16:37,317 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:16:37,351 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:16:37,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:16:37,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:16:37,353 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:16:37,354 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:16:37,354 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:16:37,355 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:16:37,355 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:16:37,356 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:16:37,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:16:37,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:16:37,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:16:37,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:16:37,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:16:37,359 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:16:37,360 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:16:37,360 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:16:37,361 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:16:37,361 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:16:37,361 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:16:37,362 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:16:37,362 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:16:37,363 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:16:37,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:37,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:16:37,364 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:16:37,364 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:16:37,365 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:16:37,365 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:37,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:16:37,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:16:37,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:16:37,367 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_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a49fa2cb2318ea112688f7105056cfdc1f55c42e8f926c44139a3fa1f7774bac [2021-11-07 02:16:37,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:16:37,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:16:37,898 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:16:37,900 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:16:37,901 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:16:37,903 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i [2021-11-07 02:16:38,004 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data/8d656c3d1/41fa5b3f17454e2c8eb29271cd8d2822/FLAGb675a63da [2021-11-07 02:16:39,435 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:16:39,436 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i [2021-11-07 02:16:39,542 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data/8d656c3d1/41fa5b3f17454e2c8eb29271cd8d2822/FLAGb675a63da [2021-11-07 02:16:39,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/data/8d656c3d1/41fa5b3f17454e2c8eb29271cd8d2822 [2021-11-07 02:16:40,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:16:40,005 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:16:40,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:40,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:16:40,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:16:40,014 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:40,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1047af11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40, skipping insertion in model container [2021-11-07 02:16:40,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:40,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:16:40,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:41,776 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_07f9031a-3368-4763-be7c-feb20fb4d78e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i[174455,174468] [2021-11-07 02:16:45,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:45,275 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:16:45,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:45,574 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_07f9031a-3368-4763-be7c-feb20fb4d78e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i[174455,174468] [2021-11-07 02:16:46,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:46,217 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:16:46,567 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_07f9031a-3368-4763-be7c-feb20fb4d78e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i[174455,174468] [2021-11-07 02:16:47,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:47,610 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:16:47,611 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47 WrapperNode [2021-11-07 02:16:47,611 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:47,613 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:16:47,613 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:16:47,614 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:16:47,623 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:47,855 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:49,043 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:16:49,044 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:16:49,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:16:49,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:16:49,056 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:49,057 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:49,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:49,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:50,067 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:50,193 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:50,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:50,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:16:50,678 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:16:50,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:16:50,679 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:16:50,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (1/1) ... [2021-11-07 02:16:50,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:50,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:16:50,730 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:16:50,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:16:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure mgt_le_to_cpu [2021-11-07 02:16:50,811 INFO L138 BoogieDeclarations]: Found implementation of procedure mgt_le_to_cpu [2021-11-07 02:16:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-07 02:16:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure mgt_cpu_to_le [2021-11-07 02:16:50,811 INFO L138 BoogieDeclarations]: Found implementation of procedure mgt_cpu_to_le [2021-11-07 02:16:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:16:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:16:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:16:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:16:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:16:50,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:16:50,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:16:50,813 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 02:16:50,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-07 02:16:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-07 02:16:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-07 02:16:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-07 02:16:50,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:16:50,814 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:16:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:16:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:16:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:16:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-07 02:16:50,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:16:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-07 02:16:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:16:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:16:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:16:50,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 02:16:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:16:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:16:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:16:50,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-07 02:16:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-07 02:16:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-07 02:16:50,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-07 02:21:47,401 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:21:47,402 INFO L299 CfgBuilder]: Removed 5688 assume(true) statements. [2021-11-07 02:21:47,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:47 BoogieIcfgContainer [2021-11-07 02:21:47,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:21:47,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:21:47,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:21:47,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:21:47,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:16:40" (1/3) ... [2021-11-07 02:21:47,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcafb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:47, skipping insertion in model container [2021-11-07 02:21:47,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:47" (2/3) ... [2021-11-07 02:21:47,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dcafb92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:21:47, skipping insertion in model container [2021-11-07 02:21:47,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:21:47" (3/3) ... [2021-11-07 02:21:47,422 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--prism54--prism54.ko-entry_point.cil.out.i [2021-11-07 02:21:47,429 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:21:47,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 02:21:47,711 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:21:47,727 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 [2021-11-07 02:21:47,728 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 02:21:47,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 6328 states, 6304 states have (on average 1.374524111675127) internal successors, (8665), 6305 states have internal predecessors, (8665), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-07 02:21:47,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:21:47,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:21:47,898 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:21:47,898 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:21:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:21:47,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1442246229, now seen corresponding path program 1 times [2021-11-07 02:21:47,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:21:47,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778048888] [2021-11-07 02:21:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:21:47,945 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:21:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:21:47,949 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:21:48,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:21:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:21:59,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 5340 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:21:59,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:21:59,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:59,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:21:59,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:21:59,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:21:59,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778048888] [2021-11-07 02:21:59,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778048888] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:21:59,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:21:59,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:21:59,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094015019] [2021-11-07 02:21:59,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:21:59,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:21:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:21:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:21:59,825 INFO L87 Difference]: Start difference. First operand has 6328 states, 6304 states have (on average 1.374524111675127) internal successors, (8665), 6305 states have internal predecessors, (8665), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:00,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:00,908 INFO L93 Difference]: Finished difference Result 12657 states and 17415 transitions. [2021-11-07 02:22:00,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:00,910 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-07 02:22:00,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:00,976 INFO L225 Difference]: With dead ends: 12657 [2021-11-07 02:22:00,976 INFO L226 Difference]: Without dead ends: 5872 [2021-11-07 02:22:01,002 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:22:01,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-11-07 02:22:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5872. [2021-11-07 02:22:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5872 states, 5849 states have (on average 1.3111643015900154) internal successors, (7669), 5849 states have internal predecessors, (7669), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-11-07 02:22:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5872 states to 5872 states and 7709 transitions. [2021-11-07 02:22:01,342 INFO L78 Accepts]: Start accepts. Automaton has 5872 states and 7709 transitions. Word has length 20 [2021-11-07 02:22:01,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:01,343 INFO L470 AbstractCegarLoop]: Abstraction has 5872 states and 7709 transitions. [2021-11-07 02:22:01,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:01,343 INFO L276 IsEmpty]: Start isEmpty. Operand 5872 states and 7709 transitions. [2021-11-07 02:22:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 02:22:01,346 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:01,346 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:01,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:01,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:01,560 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:01,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1898124107, now seen corresponding path program 1 times [2021-11-07 02:22:01,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:01,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414393804] [2021-11-07 02:22:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:01,586 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:01,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:01,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:01,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:22:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:12,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 5350 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:12,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:13,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:13,787 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:13,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414393804] [2021-11-07 02:22:13,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414393804] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:13,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063916500] [2021-11-07 02:22:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:13,788 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:13,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:13,793 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:13,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 02:22:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:17,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 5350 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:22:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:17,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:17,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063916500] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:17,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:17,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 02:22:17,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755394347] [2021-11-07 02:22:17,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:22:17,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:22:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:17,738 INFO L87 Difference]: Start difference. First operand 5872 states and 7709 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:21,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:21,963 INFO L93 Difference]: Finished difference Result 23417 states and 30756 transitions. [2021-11-07 02:22:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:22:21,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-07 02:22:21,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:22,099 INFO L225 Difference]: With dead ends: 23417 [2021-11-07 02:22:22,100 INFO L226 Difference]: Without dead ends: 17557 [2021-11-07 02:22:22,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:22:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17557 states. [2021-11-07 02:22:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17557 to 17557. [2021-11-07 02:22:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17557 states, 17490 states have (on average 1.3114351057747284) internal successors, (22937), 17490 states have internal predecessors, (22937), 60 states have call successors, (60), 6 states have call predecessors, (60), 6 states have return successors, (60), 60 states have call predecessors, (60), 60 states have call successors, (60) [2021-11-07 02:22:23,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17557 states to 17557 states and 23057 transitions. [2021-11-07 02:22:23,079 INFO L78 Accepts]: Start accepts. Automaton has 17557 states and 23057 transitions. Word has length 22 [2021-11-07 02:22:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:23,079 INFO L470 AbstractCegarLoop]: Abstraction has 17557 states and 23057 transitions. [2021-11-07 02:22:23,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 17557 states and 23057 transitions. [2021-11-07 02:22:23,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 02:22:23,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:23,086 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:23,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:23,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:23,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:22:23,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:23,512 INFO L85 PathProgramCache]: Analyzing trace with hash -62127045, now seen corresponding path program 1 times [2021-11-07 02:22:23,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:23,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1106088504] [2021-11-07 02:22:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:23,532 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:23,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:23,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:23,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:22:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:35,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 5362 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:35,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:35,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:22:35,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:35,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1106088504] [2021-11-07 02:22:35,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1106088504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:35,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [395449751] [2021-11-07 02:22:35,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:35,841 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:35,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:35,842 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:35,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 02:22:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 5362 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:22:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:39,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:40,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:22:40,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [395449751] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:22:40,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:22:40,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 02:22:40,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175269539] [2021-11-07 02:22:40,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 02:22:40,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:22:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 02:22:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:22:40,330 INFO L87 Difference]: Start difference. First operand 17557 states and 23057 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:22:44,320 INFO L93 Difference]: Finished difference Result 52645 states and 69142 transitions. [2021-11-07 02:22:44,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:22:44,321 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-07 02:22:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:22:44,472 INFO L225 Difference]: With dead ends: 52645 [2021-11-07 02:22:44,473 INFO L226 Difference]: Without dead ends: 35095 [2021-11-07 02:22:44,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 02:22:44,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35095 states. [2021-11-07 02:22:45,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35095 to 34975. [2021-11-07 02:22:45,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34975 states, 34842 states have (on average 1.3111474657023132) internal successors, (45683), 34842 states have internal predecessors, (45683), 120 states have call successors, (120), 12 states have call predecessors, (120), 12 states have return successors, (120), 120 states have call predecessors, (120), 120 states have call successors, (120) [2021-11-07 02:22:46,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34975 states to 34975 states and 45923 transitions. [2021-11-07 02:22:46,064 INFO L78 Accepts]: Start accepts. Automaton has 34975 states and 45923 transitions. Word has length 26 [2021-11-07 02:22:46,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:22:46,065 INFO L470 AbstractCegarLoop]: Abstraction has 34975 states and 45923 transitions. [2021-11-07 02:22:46,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:22:46,066 INFO L276 IsEmpty]: Start isEmpty. Operand 34975 states and 45923 transitions. [2021-11-07 02:22:46,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:22:46,092 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:22:46,093 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:22:46,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:46,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:22:46,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:46,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:22:46,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:22:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash -293702609, now seen corresponding path program 1 times [2021-11-07 02:22:46,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:22:46,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [582173179] [2021-11-07 02:22:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:46,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:22:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:22:46,534 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:22:46,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:22:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:22:58,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 5547 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:22:58,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:22:58,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:22:58,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:22:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:22:59,452 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:22:59,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [582173179] [2021-11-07 02:22:59,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [582173179] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:22:59,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1738914679] [2021-11-07 02:22:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:22:59,453 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:22:59,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:22:59,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:22:59,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 02:23:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:02,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 5547 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:02,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:03,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:23:03,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1738914679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:03,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:03,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:23:03,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844152989] [2021-11-07 02:23:03,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:03,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:03,640 INFO L87 Difference]: Start difference. First operand 34975 states and 45923 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:05,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:05,796 INFO L93 Difference]: Finished difference Result 93009 states and 121931 transitions. [2021-11-07 02:23:05,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:05,797 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:23:05,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:05,973 INFO L225 Difference]: With dead ends: 93009 [2021-11-07 02:23:05,973 INFO L226 Difference]: Without dead ends: 58046 [2021-11-07 02:23:06,038 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:06,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58046 states. [2021-11-07 02:23:07,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58046 to 56953. [2021-11-07 02:23:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56953 states, 56736 states have (on average 1.3078292442188382) internal successors, (74201), 56742 states have internal predecessors, (74201), 198 states have call successors, (198), 18 states have call predecessors, (198), 18 states have return successors, (198), 192 states have call predecessors, (198), 198 states have call successors, (198) [2021-11-07 02:23:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56953 states to 56953 states and 74597 transitions. [2021-11-07 02:23:08,298 INFO L78 Accepts]: Start accepts. Automaton has 56953 states and 74597 transitions. Word has length 67 [2021-11-07 02:23:08,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:08,298 INFO L470 AbstractCegarLoop]: Abstraction has 56953 states and 74597 transitions. [2021-11-07 02:23:08,298 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:08,299 INFO L276 IsEmpty]: Start isEmpty. Operand 56953 states and 74597 transitions. [2021-11-07 02:23:08,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:23:08,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:08,342 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:08,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-07 02:23:08,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:08,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:08,743 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:08,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:08,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1633879249, now seen corresponding path program 1 times [2021-11-07 02:23:08,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:08,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [137841450] [2021-11-07 02:23:08,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:08,768 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:08,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:08,769 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:08,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:23:19,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 5584 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:23:19,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:20,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:21,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-07 02:23:21,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:21,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [137841450] [2021-11-07 02:23:21,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [137841450] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:21,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1200217041] [2021-11-07 02:23:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:21,465 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:21,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:21,466 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:21,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 02:23:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:24,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 5584 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:25,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:25,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 02:23:25,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1200217041] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:25,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:25,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 02:23:25,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091072808] [2021-11-07 02:23:25,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:25,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:25,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:25,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:25,805 INFO L87 Difference]: Start difference. First operand 56953 states and 74597 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:28,690 INFO L93 Difference]: Finished difference Result 152303 states and 199354 transitions. [2021-11-07 02:23:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:28,701 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-11-07 02:23:28,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:29,060 INFO L225 Difference]: With dead ends: 152303 [2021-11-07 02:23:29,060 INFO L226 Difference]: Without dead ends: 95362 [2021-11-07 02:23:29,147 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95362 states. [2021-11-07 02:23:31,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95362 to 95355. [2021-11-07 02:23:32,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95355 states, 95078 states have (on average 1.3069374618734093) internal successors, (124261), 95084 states have internal predecessors, (124261), 246 states have call successors, (246), 30 states have call predecessors, (246), 30 states have return successors, (246), 240 states have call predecessors, (246), 246 states have call successors, (246) [2021-11-07 02:23:32,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95355 states to 95355 states and 124753 transitions. [2021-11-07 02:23:32,510 INFO L78 Accepts]: Start accepts. Automaton has 95355 states and 124753 transitions. Word has length 86 [2021-11-07 02:23:32,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:32,510 INFO L470 AbstractCegarLoop]: Abstraction has 95355 states and 124753 transitions. [2021-11-07 02:23:32,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:32,511 INFO L276 IsEmpty]: Start isEmpty. Operand 95355 states and 124753 transitions. [2021-11-07 02:23:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:23:32,563 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:32,564 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:32,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:32,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:32,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:32,988 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:32,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:32,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1210005461, now seen corresponding path program 1 times [2021-11-07 02:23:33,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:33,005 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901575344] [2021-11-07 02:23:33,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:33,005 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:33,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:33,006 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:33,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:23:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:44,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 5616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:23:44,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:23:45,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:23:46,234 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:23:46,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901575344] [2021-11-07 02:23:46,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901575344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:23:46,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [618359282] [2021-11-07 02:23:46,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:46,235 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:23:46,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:23:46,239 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:23:46,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 02:23:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:23:49,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 5616 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:23:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:23:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:23:50,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:23:50,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:23:50,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [618359282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:23:50,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:23:50,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:23:50,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095574612] [2021-11-07 02:23:50,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:23:50,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:23:50,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:23:50,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:50,946 INFO L87 Difference]: Start difference. First operand 95355 states and 124753 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:23:54,123 INFO L93 Difference]: Finished difference Result 190698 states and 249492 transitions. [2021-11-07 02:23:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:23:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 02:23:54,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:23:54,343 INFO L225 Difference]: With dead ends: 190698 [2021-11-07 02:23:54,344 INFO L226 Difference]: Without dead ends: 95355 [2021-11-07 02:23:54,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 381 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:23:54,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95355 states. [2021-11-07 02:23:57,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95355 to 95355. [2021-11-07 02:23:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95355 states, 95078 states have (on average 1.3068112497107638) internal successors, (124249), 95084 states have internal predecessors, (124249), 246 states have call successors, (246), 30 states have call predecessors, (246), 30 states have return successors, (246), 240 states have call predecessors, (246), 246 states have call successors, (246) [2021-11-07 02:23:57,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95355 states to 95355 states and 124741 transitions. [2021-11-07 02:23:57,821 INFO L78 Accepts]: Start accepts. Automaton has 95355 states and 124741 transitions. Word has length 98 [2021-11-07 02:23:57,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:23:57,822 INFO L470 AbstractCegarLoop]: Abstraction has 95355 states and 124741 transitions. [2021-11-07 02:23:57,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:23:57,822 INFO L276 IsEmpty]: Start isEmpty. Operand 95355 states and 124741 transitions. [2021-11-07 02:23:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 02:23:57,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:23:57,871 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:23:57,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:23:58,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-11-07 02:23:58,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:23:58,294 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:23:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:23:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 823943442, now seen corresponding path program 1 times [2021-11-07 02:23:58,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:23:58,303 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635977678] [2021-11-07 02:23:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:23:58,303 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:23:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:23:58,304 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:23:58,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:24:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:09,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 5659 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:09,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:24:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:24:11,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:11,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635977678] [2021-11-07 02:24:11,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635977678] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:11,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [710503281] [2021-11-07 02:24:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:11,024 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:11,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:11,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 02:24:14,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 5659 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:14,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:24:15,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:24:16,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [710503281] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:16,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:16,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:24:16,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116347983] [2021-11-07 02:24:16,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:16,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:16,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:16,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:24:16,309 INFO L87 Difference]: Start difference. First operand 95355 states and 124741 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:20,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:20,730 INFO L93 Difference]: Finished difference Result 286005 states and 374123 transitions. [2021-11-07 02:24:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:20,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-11-07 02:24:20,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:21,181 INFO L225 Difference]: With dead ends: 286005 [2021-11-07 02:24:21,181 INFO L226 Difference]: Without dead ends: 190662 [2021-11-07 02:24:21,329 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:24:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190662 states. [2021-11-07 02:24:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190662 to 134303. [2021-11-07 02:24:26,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134303 states, 133750 states have (on average 1.3130018691588785) internal successors, (175614), 133762 states have internal predecessors, (175614), 492 states have call successors, (492), 60 states have call predecessors, (492), 60 states have return successors, (492), 480 states have call predecessors, (492), 492 states have call successors, (492) [2021-11-07 02:24:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134303 states to 134303 states and 176598 transitions. [2021-11-07 02:24:26,569 INFO L78 Accepts]: Start accepts. Automaton has 134303 states and 176598 transitions. Word has length 111 [2021-11-07 02:24:26,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:26,570 INFO L470 AbstractCegarLoop]: Abstraction has 134303 states and 176598 transitions. [2021-11-07 02:24:26,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 2 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 134303 states and 176598 transitions. [2021-11-07 02:24:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 02:24:26,611 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:26,611 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:26,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 02:24:26,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-11-07 02:24:27,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:27,012 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:24:27,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:27,013 INFO L85 PathProgramCache]: Analyzing trace with hash 953086548, now seen corresponding path program 1 times [2021-11-07 02:24:27,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:27,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940206169] [2021-11-07 02:24:27,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:27,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:27,021 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:27,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:24:37,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:38,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 5660 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:38,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:38,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:24:38,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-07 02:24:39,626 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:39,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940206169] [2021-11-07 02:24:39,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940206169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:24:39,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [694353370] [2021-11-07 02:24:39,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:39,627 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:39,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:24:39,628 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:24:39,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_07f9031a-3368-4763-be7c-feb20fb4d78e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 02:24:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:43,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 5660 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:43,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:24:44,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-07 02:24:45,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [694353370] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:45,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 02:24:45,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 02:24:45,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044262737] [2021-11-07 02:24:45,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:45,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:45,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:45,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:24:45,134 INFO L87 Difference]: Start difference. First operand 134303 states and 176598 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)