./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--libertas--usb8xxx.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_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/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_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/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--libertas--usb8xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/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_0aa7a423-36c9-406d-a524-1a102d67e79e/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 1b605371288ab675786f884c3e899aa7b22c9968bb31ac2f2bc3b55776b1682d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:32,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:32,453 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:32,487 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:32,488 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:32,489 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:32,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:32,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:32,495 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:32,497 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:32,498 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:32,499 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:32,500 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:32,501 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:32,503 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:32,505 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:32,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:32,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:32,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:32,512 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:32,514 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:32,524 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:32,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:32,527 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:32,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:32,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:32,537 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:32,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:32,541 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:32,541 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:32,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:32,543 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:32,543 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:32,544 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:32,545 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:32,545 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:32,546 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:32,547 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:32,547 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:32,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:32,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:32,550 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 01:25:32,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:32,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:32,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:32,580 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:32,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:32,581 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:32,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:25:32,581 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:32,581 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:32,582 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:25:32,582 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:25:32,582 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:32,582 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:25:32,582 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:25:32,583 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:25:32,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:32,584 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:25:32,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:32,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:32,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:32,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:32,585 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:32,585 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:32,585 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:32,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:32,586 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:32,586 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:32,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:32,586 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:32,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:32,587 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:32,587 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:25:32,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:25:32,587 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:32,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:32,588 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:32,588 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_0aa7a423-36c9-406d-a524-1a102d67e79e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b605371288ab675786f884c3e899aa7b22c9968bb31ac2f2bc3b55776b1682d [2021-11-07 01:25:32,841 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:32,872 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:32,874 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:32,875 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:32,876 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:32,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/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--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:25:32,947 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data/fc44437fa/7d1722a81f4848e3913ca542a62cd14d/FLAGda33ef00d [2021-11-07 01:25:33,850 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:33,851 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:25:33,908 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data/fc44437fa/7d1722a81f4848e3913ca542a62cd14d/FLAGda33ef00d [2021-11-07 01:25:34,291 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data/fc44437fa/7d1722a81f4848e3913ca542a62cd14d [2021-11-07 01:25:34,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:34,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:34,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:34,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:34,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:34,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:34" (1/1) ... [2021-11-07 01:25:34,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c035bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:34, skipping insertion in model container [2021-11-07 01:25:34,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:34" (1/1) ... [2021-11-07 01:25:34,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:34,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:35,396 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_0aa7a423-36c9-406d-a524-1a102d67e79e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2021-11-07 01:25:35,626 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 01:25:35,654 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 01:25:35,692 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 01:25:35,740 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 01:25:35,748 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 01:25:35,754 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 01:25:35,756 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 01:25:35,776 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 01:25:35,779 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 01:25:35,789 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 01:25:35,810 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 01:25:35,811 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 01:25:35,821 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 01:25:35,825 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 01:25:35,826 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 01:25:35,830 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 01:25:35,835 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 01:25:35,839 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 01:25:35,859 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 01:25:35,876 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 01:25:35,897 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 01:25:35,913 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 01:25:35,992 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 01:25:36,031 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:36,083 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 01:25:36,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54c98fc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:36, skipping insertion in model container [2021-11-07 01:25:36,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:36,085 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:25:36,088 INFO L168 Benchmark]: Toolchain (without parser) took 1791.56 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 68.1 MB in the beginning and 93.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 37.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:36,088 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 59.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:25:36,090 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1789.07 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 68.1 MB in the beginning and 93.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 37.1 MB. Max. memory is 16.1 GB. [2021-11-07 01:25:36,092 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 59.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1789.07 ms. Allocated memory was 98.6 MB in the beginning and 136.3 MB in the end (delta: 37.7 MB). Free memory was 68.1 MB in the beginning and 93.1 MB in the end (delta: -24.9 MB). Peak memory consumption was 37.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 6511]: 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_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/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_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/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--libertas--usb8xxx.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/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_0aa7a423-36c9-406d-a524-1a102d67e79e/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 1b605371288ab675786f884c3e899aa7b22c9968bb31ac2f2bc3b55776b1682d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:25:38,389 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:25:38,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:25:38,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:25:38,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:25:38,425 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:25:38,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:25:38,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:25:38,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:25:38,433 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:25:38,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:25:38,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:25:38,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:25:38,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:25:38,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:25:38,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:25:38,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:25:38,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:25:38,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:25:38,448 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:25:38,452 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:25:38,456 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:25:38,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:25:38,459 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:25:38,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:25:38,473 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:25:38,473 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:25:38,475 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:25:38,478 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:25:38,479 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:25:38,481 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:25:38,482 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:25:38,483 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:25:38,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:25:38,486 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:25:38,487 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:25:38,488 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:25:38,488 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:25:38,488 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:25:38,489 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:25:38,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:25:38,492 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 01:25:38,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:25:38,530 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:25:38,531 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:25:38,531 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:25:38,531 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:25:38,532 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:25:38,532 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:25:38,532 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:25:38,532 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:25:38,533 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:25:38,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:25:38,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:25:38,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:25:38,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:25:38,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:25:38,534 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:25:38,535 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:25:38,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:25:38,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:25:38,535 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:25:38,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:25:38,536 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:25:38,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:25:38,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:38,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:25:38,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:25:38,537 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:25:38,537 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:25:38,537 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:25:38,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:25:38,538 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:25:38,538 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:25:38,538 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_0aa7a423-36c9-406d-a524-1a102d67e79e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b605371288ab675786f884c3e899aa7b22c9968bb31ac2f2bc3b55776b1682d [2021-11-07 01:25:38,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:25:38,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:25:38,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:25:38,920 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:25:38,920 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:25:38,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/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--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:25:38,988 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data/0b7345879/c94620d2a81b482f9170453e0cec210e/FLAGb097c28b3 [2021-11-07 01:25:39,901 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:25:39,901 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:25:39,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data/0b7345879/c94620d2a81b482f9170453e0cec210e/FLAGb097c28b3 [2021-11-07 01:25:40,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/data/0b7345879/c94620d2a81b482f9170453e0cec210e [2021-11-07 01:25:40,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:25:40,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:25:40,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:40,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:25:40,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:25:40,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:40" (1/1) ... [2021-11-07 01:25:40,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3435028f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:40, skipping insertion in model container [2021-11-07 01:25:40,373 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:25:40" (1/1) ... [2021-11-07 01:25:40,380 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:25:40,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:41,534 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_0aa7a423-36c9-406d-a524-1a102d67e79e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2021-11-07 01:25:42,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:42,297 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:25:42,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:25:42,512 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_0aa7a423-36c9-406d-a524-1a102d67e79e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2021-11-07 01:25:42,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:42,734 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:25:43,008 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_0aa7a423-36c9-406d-a524-1a102d67e79e/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i[180577,180590] [2021-11-07 01:25:43,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:25:43,340 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:25:43,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43 WrapperNode [2021-11-07 01:25:43,341 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:25:43,342 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:43,342 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:25:43,343 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:25:43,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,447 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,678 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:25:43,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:25:43,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:25:43,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:25:43,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:25:43,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:25:43,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:25:43,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:25:43,877 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (1/1) ... [2021-11-07 01:25:43,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:25:43,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:25:43,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:25:43,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:25:43,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:25:43,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 01:25:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:25:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 01:25:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:25:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:25:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 01:25:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 01:25:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 01:25:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:25:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:25:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 01:25:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 01:25:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:25:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 01:25:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 01:25:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:25:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:25:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-07 01:25:43,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:25:43,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:26:08,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:26:08,019 INFO L299 CfgBuilder]: Removed 453 assume(true) statements. [2021-11-07 01:26:08,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:08 BoogieIcfgContainer [2021-11-07 01:26:08,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:26:08,027 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:26:08,027 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:26:08,030 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:26:08,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:25:40" (1/3) ... [2021-11-07 01:26:08,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e29629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:08, skipping insertion in model container [2021-11-07 01:26:08,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:25:43" (2/3) ... [2021-11-07 01:26:08,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36e29629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:26:08, skipping insertion in model container [2021-11-07 01:26:08,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:26:08" (3/3) ... [2021-11-07 01:26:08,034 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--libertas--usb8xxx.ko-entry_point.cil.out.i [2021-11-07 01:26:08,040 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:26:08,041 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:26:08,106 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:26:08,116 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 01:26:08,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:26:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand has 732 states, 730 states have (on average 1.5232876712328767) internal successors, (1112), 731 states have internal predecessors, (1112), 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 01:26:08,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:26:08,160 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:08,160 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 01:26:08,161 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:08,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:08,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1244740702, now seen corresponding path program 1 times [2021-11-07 01:26:08,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:08,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418375666] [2021-11-07 01:26:08,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:08,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:08,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:08,196 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:08,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:26:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 1427 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:26:12,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:12,825 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 01:26:12,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:12,939 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 01:26:12,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:12,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418375666] [2021-11-07 01:26:12,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418375666] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:12,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:26:12,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:26:12,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004934674] [2021-11-07 01:26:12,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:12,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:26:12,968 INFO L87 Difference]: Start difference. First operand has 732 states, 730 states have (on average 1.5232876712328767) internal successors, (1112), 731 states have internal predecessors, (1112), 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) 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 01:26:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:13,097 INFO L93 Difference]: Finished difference Result 1461 states and 2221 transitions. [2021-11-07 01:26:13,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:13,100 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 01:26:13,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:13,121 INFO L225 Difference]: With dead ends: 1461 [2021-11-07 01:26:13,122 INFO L226 Difference]: Without dead ends: 726 [2021-11-07 01:26:13,128 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 01:26:13,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-11-07 01:26:13,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 726. [2021-11-07 01:26:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.4882758620689656) internal successors, (1079), 725 states have internal predecessors, (1079), 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 01:26:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1079 transitions. [2021-11-07 01:26:13,232 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1079 transitions. Word has length 20 [2021-11-07 01:26:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:13,233 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1079 transitions. [2021-11-07 01:26:13,234 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 01:26:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1079 transitions. [2021-11-07 01:26:13,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:26:13,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:13,241 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 01:26:13,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:13,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:13,442 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:13,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:13,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1903380930, now seen corresponding path program 1 times [2021-11-07 01:26:13,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:13,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40468828] [2021-11-07 01:26:13,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:13,447 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:13,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:13,451 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:13,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:26:17,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:17,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:17,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:17,551 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 01:26:17,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:17,850 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 01:26:17,850 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:17,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40468828] [2021-11-07 01:26:17,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40468828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:17,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [683144514] [2021-11-07 01:26:17,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:17,851 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:17,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:17,858 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:17,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-11-07 01:26:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:19,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:19,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:19,614 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 01:26:19,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:19,727 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 01:26:19,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [683144514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:19,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:19,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:26:19,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005538003] [2021-11-07 01:26:19,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:19,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:19,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:19,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:19,731 INFO L87 Difference]: Start difference. First operand 726 states and 1079 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 01:26:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:22,146 INFO L93 Difference]: Finished difference Result 2830 states and 4233 transitions. [2021-11-07 01:26:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:22,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 22 [2021-11-07 01:26:22,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:22,161 INFO L225 Difference]: With dead ends: 2830 [2021-11-07 01:26:22,161 INFO L226 Difference]: Without dead ends: 2117 [2021-11-07 01:26:22,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:22,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-11-07 01:26:22,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 2117. [2021-11-07 01:26:22,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 1.4957466918714555) internal successors, (3165), 2116 states have internal predecessors, (3165), 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 01:26:22,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3165 transitions. [2021-11-07 01:26:22,246 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3165 transitions. Word has length 22 [2021-11-07 01:26:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:22,247 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3165 transitions. [2021-11-07 01:26:22,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 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 01:26:22,247 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3165 transitions. [2021-11-07 01:26:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:26:22,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:22,250 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, 1, 1, 1] [2021-11-07 01:26:22,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:22,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:22,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:26:22,658 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:22,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2084870161, now seen corresponding path program 1 times [2021-11-07 01:26:22,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:22,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657542937] [2021-11-07 01:26:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:22,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:22,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:22,662 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:22,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:26:26,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:26,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:26,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:26,774 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 01:26:26,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:27,111 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 01:26:27,111 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:27,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657542937] [2021-11-07 01:26:27,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657542937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:27,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1176246083] [2021-11-07 01:26:27,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:27,112 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:27,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:27,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-07 01:26:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:28,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 1473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:28,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:28,674 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 01:26:28,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:28,741 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 01:26:28,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1176246083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:28,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:28,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:26:28,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502770322] [2021-11-07 01:26:28,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:28,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:28,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:28,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:28,744 INFO L87 Difference]: Start difference. First operand 2117 states and 3165 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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 01:26:29,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:29,017 INFO L93 Difference]: Finished difference Result 2127 states and 3173 transitions. [2021-11-07 01:26:29,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:29,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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 29 [2021-11-07 01:26:29,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:29,031 INFO L225 Difference]: With dead ends: 2127 [2021-11-07 01:26:29,031 INFO L226 Difference]: Without dead ends: 2122 [2021-11-07 01:26:29,033 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-11-07 01:26:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2117. [2021-11-07 01:26:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2116 states have (on average 1.4952741020793952) internal successors, (3164), 2116 states have internal predecessors, (3164), 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 01:26:29,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 3164 transitions. [2021-11-07 01:26:29,112 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 3164 transitions. Word has length 29 [2021-11-07 01:26:29,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:29,113 INFO L470 AbstractCegarLoop]: Abstraction has 2117 states and 3164 transitions. [2021-11-07 01:26:29,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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 01:26:29,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 3164 transitions. [2021-11-07 01:26:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 01:26:29,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:29,115 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, 1, 1, 1] [2021-11-07 01:26:29,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:29,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:29,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:29,516 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:29,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash -2027611859, now seen corresponding path program 1 times [2021-11-07 01:26:29,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:29,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801942915] [2021-11-07 01:26:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:29,519 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:29,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:29,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:29,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:26:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:33,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:33,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:33,594 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 01:26:33,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:33,985 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 01:26:33,986 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:33,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [801942915] [2021-11-07 01:26:33,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [801942915] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:33,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890018604] [2021-11-07 01:26:33,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:33,986 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:33,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:33,987 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:33,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-07 01:26:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:35,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 1472 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:26:35,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:35,706 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 01:26:35,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:35,975 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 01:26:35,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [890018604] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:35,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:35,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-07 01:26:35,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790997841] [2021-11-07 01:26:35,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:26:35,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:35,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:26:35,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:26:35,977 INFO L87 Difference]: Start difference. First operand 2117 states and 3164 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 01:26:36,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:36,786 INFO L93 Difference]: Finished difference Result 6323 states and 9461 transitions. [2021-11-07 01:26:36,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:26:36,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 29 [2021-11-07 01:26:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:36,810 INFO L225 Difference]: With dead ends: 6323 [2021-11-07 01:26:36,811 INFO L226 Difference]: Without dead ends: 4214 [2021-11-07 01:26:36,815 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:26:36,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4214 states. [2021-11-07 01:26:36,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4214 to 4190. [2021-11-07 01:26:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4190 states, 4189 states have (on average 1.4965385533540225) internal successors, (6269), 4189 states have internal predecessors, (6269), 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 01:26:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4190 states to 4190 states and 6269 transitions. [2021-11-07 01:26:36,982 INFO L78 Accepts]: Start accepts. Automaton has 4190 states and 6269 transitions. Word has length 29 [2021-11-07 01:26:36,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:36,982 INFO L470 AbstractCegarLoop]: Abstraction has 4190 states and 6269 transitions. [2021-11-07 01:26:36,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 7 states have internal predecessors, (31), 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 01:26:36,983 INFO L276 IsEmpty]: Start isEmpty. Operand 4190 states and 6269 transitions. [2021-11-07 01:26:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:26:36,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:36,992 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:26:37,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:37,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:37,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:37,416 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:37,417 INFO L85 PathProgramCache]: Analyzing trace with hash 460326880, now seen corresponding path program 1 times [2021-11-07 01:26:37,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:37,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2131493064] [2021-11-07 01:26:37,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:37,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:37,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:37,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:37,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:26:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:41,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:41,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:42,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:42,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2131493064] [2021-11-07 01:26:42,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2131493064] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:42,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1527112900] [2021-11-07 01:26:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:42,236 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:42,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:42,237 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:42,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-07 01:26:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 1573 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:43,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:43,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:44,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:44,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1527112900] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:44,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:44,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:26:44,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748904153] [2021-11-07 01:26:44,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:26:44,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:44,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:26:44,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:44,094 INFO L87 Difference]: Start difference. First operand 4190 states and 6269 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 01:26:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:44,593 INFO L93 Difference]: Finished difference Result 8861 states and 13307 transitions. [2021-11-07 01:26:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:26:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 59 [2021-11-07 01:26:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:44,620 INFO L225 Difference]: With dead ends: 8861 [2021-11-07 01:26:44,620 INFO L226 Difference]: Without dead ends: 4684 [2021-11-07 01:26:44,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:26:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2021-11-07 01:26:44,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4593. [2021-11-07 01:26:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4593 states, 4592 states have (on average 1.5045731707317074) internal successors, (6909), 4592 states have internal predecessors, (6909), 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 01:26:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4593 states to 4593 states and 6909 transitions. [2021-11-07 01:26:44,806 INFO L78 Accepts]: Start accepts. Automaton has 4593 states and 6909 transitions. Word has length 59 [2021-11-07 01:26:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:44,807 INFO L470 AbstractCegarLoop]: Abstraction has 4593 states and 6909 transitions. [2021-11-07 01:26:44,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 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 01:26:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4593 states and 6909 transitions. [2021-11-07 01:26:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:26:44,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:44,814 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:26:44,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:45,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2021-11-07 01:26:45,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:45,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:45,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:45,237 INFO L85 PathProgramCache]: Analyzing trace with hash 933976228, now seen corresponding path program 1 times [2021-11-07 01:26:45,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:45,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686802530] [2021-11-07 01:26:45,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:45,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:45,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:45,240 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:45,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:26:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:49,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:26:49,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:49,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:26:50,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:26:50,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686802530] [2021-11-07 01:26:50,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686802530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:26:50,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1395465853] [2021-11-07 01:26:50,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:50,169 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:50,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:26:50,170 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:26:50,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-07 01:26:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:26:51,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 1594 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:26:51,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:26:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:52,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:26:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 01:26:52,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1395465853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:26:52,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:26:52,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:26:52,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32221688] [2021-11-07 01:26:52,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:26:52,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:26:52,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:26:52,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:52,313 INFO L87 Difference]: Start difference. First operand 4593 states and 6909 transitions. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 01:26:54,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:26:54,934 INFO L93 Difference]: Finished difference Result 10312 states and 15655 transitions. [2021-11-07 01:26:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:26:54,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 01:26:54,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:26:54,970 INFO L225 Difference]: With dead ends: 10312 [2021-11-07 01:26:54,971 INFO L226 Difference]: Without dead ends: 5732 [2021-11-07 01:26:54,978 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:26:54,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5732 states. [2021-11-07 01:26:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5732 to 5717. [2021-11-07 01:26:55,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5717 states, 5716 states have (on average 1.5197690692792163) internal successors, (8687), 5716 states have internal predecessors, (8687), 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 01:26:55,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 8687 transitions. [2021-11-07 01:26:55,193 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 8687 transitions. Word has length 67 [2021-11-07 01:26:55,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:26:55,193 INFO L470 AbstractCegarLoop]: Abstraction has 5717 states and 8687 transitions. [2021-11-07 01:26:55,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 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 01:26:55,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 8687 transitions. [2021-11-07 01:26:55,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:26:55,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:26:55,204 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 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] [2021-11-07 01:26:55,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:55,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:26:55,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:26:55,628 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:26:55,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:26:55,629 INFO L85 PathProgramCache]: Analyzing trace with hash -772051594, now seen corresponding path program 1 times [2021-11-07 01:26:55,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:26:55,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896497900] [2021-11-07 01:26:55,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:26:55,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:26:55,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:26:55,635 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:26:55,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:26:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:00,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:00,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:00,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:00,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:01,149 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:01,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896497900] [2021-11-07 01:27:01,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896497900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:01,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [752939712] [2021-11-07 01:27:01,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:01,149 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:01,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:01,150 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:01,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-07 01:27:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:02,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 1723 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:02,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:27:03,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:03,762 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:27:03,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [752939712] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:03,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:03,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:27:03,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974524307] [2021-11-07 01:27:03,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:27:03,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:03,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:27:03,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:27:03,765 INFO L87 Difference]: Start difference. First operand 5717 states and 8687 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 01:27:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:07,173 INFO L93 Difference]: Finished difference Result 18486 states and 27949 transitions. [2021-11-07 01:27:07,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:27:07,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 103 [2021-11-07 01:27:07,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:07,246 INFO L225 Difference]: With dead ends: 18486 [2021-11-07 01:27:07,246 INFO L226 Difference]: Without dead ends: 12782 [2021-11-07 01:27:07,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:27:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12782 states. [2021-11-07 01:27:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12782 to 5729. [2021-11-07 01:27:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5729 states, 5728 states have (on average 1.5186801675977655) internal successors, (8699), 5728 states have internal predecessors, (8699), 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 01:27:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5729 states to 5729 states and 8699 transitions. [2021-11-07 01:27:07,670 INFO L78 Accepts]: Start accepts. Automaton has 5729 states and 8699 transitions. Word has length 103 [2021-11-07 01:27:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:07,670 INFO L470 AbstractCegarLoop]: Abstraction has 5729 states and 8699 transitions. [2021-11-07 01:27:07,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 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 01:27:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 5729 states and 8699 transitions. [2021-11-07 01:27:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 01:27:07,680 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:07,681 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:07,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:07,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:08,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:08,104 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:08,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:08,105 INFO L85 PathProgramCache]: Analyzing trace with hash -368975152, now seen corresponding path program 1 times [2021-11-07 01:27:08,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:08,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979408015] [2021-11-07 01:27:08,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:08,109 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:08,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:08,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:27:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:13,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:13,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:13,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:14,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:14,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979408015] [2021-11-07 01:27:14,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979408015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:14,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [80237386] [2021-11-07 01:27:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:14,663 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:14,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:14,664 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:14,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-07 01:27:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:27:16,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:27:17,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:27:17,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [80237386] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:17,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:17,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-11-07 01:27:17,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37765341] [2021-11-07 01:27:17,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:27:17,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:27:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:17,771 INFO L87 Difference]: Start difference. First operand 5729 states and 8699 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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 01:27:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:17,947 INFO L93 Difference]: Finished difference Result 11451 states and 17395 transitions. [2021-11-07 01:27:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:27:17,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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 135 [2021-11-07 01:27:17,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:17,963 INFO L225 Difference]: With dead ends: 11451 [2021-11-07 01:27:17,963 INFO L226 Difference]: Without dead ends: 5735 [2021-11-07 01:27:17,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 529 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:27:17,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5735 states. [2021-11-07 01:27:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5735 to 5735. [2021-11-07 01:27:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5735 states, 5734 states have (on average 1.5181374258807117) internal successors, (8705), 5734 states have internal predecessors, (8705), 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 01:27:18,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5735 states to 5735 states and 8705 transitions. [2021-11-07 01:27:18,214 INFO L78 Accepts]: Start accepts. Automaton has 5735 states and 8705 transitions. Word has length 135 [2021-11-07 01:27:18,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:18,215 INFO L470 AbstractCegarLoop]: Abstraction has 5735 states and 8705 transitions. [2021-11-07 01:27:18,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 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 01:27:18,216 INFO L276 IsEmpty]: Start isEmpty. Operand 5735 states and 8705 transitions. [2021-11-07 01:27:18,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 01:27:18,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:18,231 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:18,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:18,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-11-07 01:27:18,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:18,636 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:18,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1363668850, now seen corresponding path program 1 times [2021-11-07 01:27:18,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:18,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753150026] [2021-11-07 01:27:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:18,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:18,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:18,641 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:18,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:27:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:23,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:24,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:25,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:25,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753150026] [2021-11-07 01:27:25,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753150026] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:25,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [573312356] [2021-11-07 01:27:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:25,013 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:25,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:25,014 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:25,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-07 01:27:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:27,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:27:27,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:27:27,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-07 01:27:28,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [573312356] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:28,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:28,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:27:28,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886130585] [2021-11-07 01:27:28,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:27:28,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:28,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:27:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:27:28,206 INFO L87 Difference]: Start difference. First operand 5735 states and 8705 transitions. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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 01:27:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:31,808 INFO L93 Difference]: Finished difference Result 23463 states and 35674 transitions. [2021-11-07 01:27:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:27:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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 135 [2021-11-07 01:27:31,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:31,863 INFO L225 Difference]: With dead ends: 23463 [2021-11-07 01:27:31,863 INFO L226 Difference]: Without dead ends: 17741 [2021-11-07 01:27:31,877 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 526 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:27:31,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17741 states. [2021-11-07 01:27:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17741 to 5819. [2021-11-07 01:27:32,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 5818 states have (on average 1.5178755586112067) internal successors, (8831), 5818 states have internal predecessors, (8831), 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 01:27:32,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 8831 transitions. [2021-11-07 01:27:32,317 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 8831 transitions. Word has length 135 [2021-11-07 01:27:32,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:32,318 INFO L470 AbstractCegarLoop]: Abstraction has 5819 states and 8831 transitions. [2021-11-07 01:27:32,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 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 01:27:32,319 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 8831 transitions. [2021-11-07 01:27:32,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 01:27:32,333 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:32,334 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:32,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:32,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-11-07 01:27:32,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:32,748 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:32,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:32,749 INFO L85 PathProgramCache]: Analyzing trace with hash -675926601, now seen corresponding path program 1 times [2021-11-07 01:27:32,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:32,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [308757511] [2021-11-07 01:27:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:32,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:32,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:32,753 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:32,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:27:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:37,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:37,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:38,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:39,166 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:39,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:39,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [308757511] [2021-11-07 01:27:39,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [308757511] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:39,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [201047209] [2021-11-07 01:27:39,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:39,167 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:39,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:39,168 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:39,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 01:27:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:41,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 1917 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:27:41,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 01:27:41,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:42,101 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 01:27:42,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [201047209] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:42,102 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:42,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:27:42,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828635012] [2021-11-07 01:27:42,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:27:42,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:27:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:27:42,104 INFO L87 Difference]: Start difference. First operand 5819 states and 8831 transitions. Second operand has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 01:27:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:42,778 INFO L93 Difference]: Finished difference Result 14040 states and 21343 transitions. [2021-11-07 01:27:42,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:27:42,780 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 139 [2021-11-07 01:27:42,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:42,798 INFO L225 Difference]: With dead ends: 14040 [2021-11-07 01:27:42,799 INFO L226 Difference]: Without dead ends: 8234 [2021-11-07 01:27:42,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:27:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8234 states. [2021-11-07 01:27:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8234 to 5819. [2021-11-07 01:27:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5819 states, 5818 states have (on average 1.516844276383637) internal successors, (8825), 5818 states have internal predecessors, (8825), 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 01:27:43,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5819 states to 5819 states and 8825 transitions. [2021-11-07 01:27:43,241 INFO L78 Accepts]: Start accepts. Automaton has 5819 states and 8825 transitions. Word has length 139 [2021-11-07 01:27:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:43,242 INFO L470 AbstractCegarLoop]: Abstraction has 5819 states and 8825 transitions. [2021-11-07 01:27:43,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.25) internal successors, (125), 4 states have internal predecessors, (125), 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 01:27:43,242 INFO L276 IsEmpty]: Start isEmpty. Operand 5819 states and 8825 transitions. [2021-11-07 01:27:43,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-11-07 01:27:43,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:43,253 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:43,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:43,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:43,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:43,665 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:43,665 INFO L85 PathProgramCache]: Analyzing trace with hash -89120587, now seen corresponding path program 1 times [2021-11-07 01:27:43,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:43,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1649199326] [2021-11-07 01:27:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:43,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:43,670 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:43,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:27:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:48,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:27:48,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:49,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:50,427 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:27:50,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:27:50,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1649199326] [2021-11-07 01:27:50,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1649199326] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:27:50,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2044346575] [2021-11-07 01:27:50,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:50,429 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:27:50,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:27:50,430 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:27:50,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 01:27:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:27:52,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 1918 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:27:52,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:27:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:27:53,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:27:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:27:54,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2044346575] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:27:54,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:27:54,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 7] imperfect sequences [5, 5] total 19 [2021-11-07 01:27:54,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805701913] [2021-11-07 01:27:54,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:27:54,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:27:54,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:27:54,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-11-07 01:27:54,633 INFO L87 Difference]: Start difference. First operand 5819 states and 8825 transitions. Second operand has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 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 01:27:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:27:58,609 INFO L93 Difference]: Finished difference Result 27215 states and 41327 transitions. [2021-11-07 01:27:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 01:27:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 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 139 [2021-11-07 01:27:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:27:58,636 INFO L225 Difference]: With dead ends: 27215 [2021-11-07 01:27:58,636 INFO L226 Difference]: Without dead ends: 21409 [2021-11-07 01:27:58,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-11-07 01:27:58,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21409 states. [2021-11-07 01:27:59,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21409 to 5849. [2021-11-07 01:27:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 5848 states have (on average 1.5141928864569083) internal successors, (8855), 5848 states have internal predecessors, (8855), 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 01:27:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 8855 transitions. [2021-11-07 01:27:59,211 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 8855 transitions. Word has length 139 [2021-11-07 01:27:59,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:27:59,211 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 8855 transitions. [2021-11-07 01:27:59,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.615384615384615) internal successors, (138), 13 states have internal predecessors, (138), 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 01:27:59,212 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 8855 transitions. [2021-11-07 01:27:59,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-07 01:27:59,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:27:59,222 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:27:59,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:59,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:27:59,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:27:59,642 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:27:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:27:59,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1186281391, now seen corresponding path program 1 times [2021-11-07 01:27:59,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:27:59,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [22712224] [2021-11-07 01:27:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:27:59,646 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:27:59,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:27:59,647 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:27:59,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:28:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:05,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:28:05,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:28:06,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:06,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [22712224] [2021-11-07 01:28:06,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [22712224] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:06,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1264223254] [2021-11-07 01:28:06,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:06,740 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:06,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:06,741 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:06,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-07 01:28:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:09,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:09,932 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:28:09,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:28:10,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1264223254] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:10,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:10,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 10 [2021-11-07 01:28:10,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681600339] [2021-11-07 01:28:10,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:28:10,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:10,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:28:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:28:10,479 INFO L87 Difference]: Start difference. First operand 5849 states and 8855 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 01:28:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:10,914 INFO L93 Difference]: Finished difference Result 12110 states and 18331 transitions. [2021-11-07 01:28:10,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:28:10,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 141 [2021-11-07 01:28:10,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:10,923 INFO L225 Difference]: With dead ends: 12110 [2021-11-07 01:28:10,923 INFO L226 Difference]: Without dead ends: 6274 [2021-11-07 01:28:10,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:28:10,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6274 states. [2021-11-07 01:28:11,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6274 to 5849. [2021-11-07 01:28:11,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 5848 states have (on average 1.5131668946648427) internal successors, (8849), 5848 states have internal predecessors, (8849), 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 01:28:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 8849 transitions. [2021-11-07 01:28:11,496 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 8849 transitions. Word has length 141 [2021-11-07 01:28:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:11,497 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 8849 transitions. [2021-11-07 01:28:11,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 01:28:11,497 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 8849 transitions. [2021-11-07 01:28:11,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 01:28:11,509 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:11,509 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:11,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:11,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:11,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:11,932 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:11,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:11,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1921840094, now seen corresponding path program 1 times [2021-11-07 01:28:11,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:11,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2040250003] [2021-11-07 01:28:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:11,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:11,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:11,938 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:11,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:28:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:17,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:17,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:28:18,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:19,206 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:28:19,206 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:19,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2040250003] [2021-11-07 01:28:19,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2040250003] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:19,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [396373848] [2021-11-07 01:28:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:19,206 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:19,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:19,208 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:19,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 01:28:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:22,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 1942 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:28:22,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:22,922 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:28:22,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:28:23,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [396373848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:23,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:23,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:28:23,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317013611] [2021-11-07 01:28:23,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:28:23,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:23,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:28:23,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:28:23,660 INFO L87 Difference]: Start difference. First operand 5849 states and 8849 transitions. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 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 01:28:26,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:26,415 INFO L93 Difference]: Finished difference Result 28595 states and 43349 transitions. [2021-11-07 01:28:26,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:28:26,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 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 142 [2021-11-07 01:28:26,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:26,444 INFO L225 Difference]: With dead ends: 28595 [2021-11-07 01:28:26,444 INFO L226 Difference]: Without dead ends: 22759 [2021-11-07 01:28:26,451 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:28:26,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2021-11-07 01:28:27,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 5867. [2021-11-07 01:28:27,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5867 states, 5866 states have (on average 1.5115922263893624) internal successors, (8867), 5866 states have internal predecessors, (8867), 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 01:28:27,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 8867 transitions. [2021-11-07 01:28:27,034 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 8867 transitions. Word has length 142 [2021-11-07 01:28:27,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:27,035 INFO L470 AbstractCegarLoop]: Abstraction has 5867 states and 8867 transitions. [2021-11-07 01:28:27,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 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 01:28:27,035 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 8867 transitions. [2021-11-07 01:28:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 01:28:27,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:27,045 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:27,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-11-07 01:28:27,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:27,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:28:27,458 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:27,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:27,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1415929990, now seen corresponding path program 1 times [2021-11-07 01:28:27,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:27,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1702397747] [2021-11-07 01:28:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:27,462 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:27,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:27,462 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:27,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:28:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:33,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:28:34,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:28:34,894 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:34,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1702397747] [2021-11-07 01:28:34,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1702397747] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:34,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1094430179] [2021-11-07 01:28:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:34,895 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:34,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:34,896 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:34,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-07 01:28:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1953 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 01:28:38,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:28:38,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:28:39,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1094430179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:39,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:39,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [5, 5] total 15 [2021-11-07 01:28:39,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942287321] [2021-11-07 01:28:39,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:28:39,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:39,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:28:39,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:28:39,635 INFO L87 Difference]: Start difference. First operand 5867 states and 8867 transitions. Second operand has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 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 01:28:43,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:28:43,053 INFO L93 Difference]: Finished difference Result 20609 states and 31181 transitions. [2021-11-07 01:28:43,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:28:43,054 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 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 144 [2021-11-07 01:28:43,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:28:43,071 INFO L225 Difference]: With dead ends: 20609 [2021-11-07 01:28:43,071 INFO L226 Difference]: Without dead ends: 14755 [2021-11-07 01:28:43,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-11-07 01:28:43,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14755 states. [2021-11-07 01:28:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14755 to 5885. [2021-11-07 01:28:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5885 states, 5884 states have (on average 1.510027192386132) internal successors, (8885), 5884 states have internal predecessors, (8885), 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 01:28:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5885 states to 5885 states and 8885 transitions. [2021-11-07 01:28:43,712 INFO L78 Accepts]: Start accepts. Automaton has 5885 states and 8885 transitions. Word has length 144 [2021-11-07 01:28:43,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:28:43,712 INFO L470 AbstractCegarLoop]: Abstraction has 5885 states and 8885 transitions. [2021-11-07 01:28:43,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.666666666666666) internal successors, (141), 9 states have internal predecessors, (141), 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 01:28:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 5885 states and 8885 transitions. [2021-11-07 01:28:43,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 01:28:43,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:28:43,725 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:28:43,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:43,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:28:44,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:44,140 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:28:44,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:28:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1748702742, now seen corresponding path program 1 times [2021-11-07 01:28:44,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:28:44,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [75848291] [2021-11-07 01:28:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:44,144 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:28:44,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:28:44,145 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:28:44,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:28:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:28:50,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:28:51,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:52,003 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:28:52,004 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:28:52,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [75848291] [2021-11-07 01:28:52,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [75848291] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:28:52,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [443320133] [2021-11-07 01:28:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:28:52,005 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:28:52,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:28:52,016 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:28:52,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-11-07 01:28:55,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:28:55,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 1964 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:28:55,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:28:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:28:55,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:28:56,633 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:28:56,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [443320133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:28:56,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:28:56,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 14 [2021-11-07 01:28:56,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590780825] [2021-11-07 01:28:56,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:28:56,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:28:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:28:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-11-07 01:28:56,635 INFO L87 Difference]: Start difference. First operand 5885 states and 8885 transitions. Second operand has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 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 01:29:01,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:01,945 INFO L93 Difference]: Finished difference Result 22073 states and 33353 transitions. [2021-11-07 01:29:01,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:29:01,946 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 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 146 [2021-11-07 01:29:01,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:01,966 INFO L225 Difference]: With dead ends: 22073 [2021-11-07 01:29:01,966 INFO L226 Difference]: Without dead ends: 16201 [2021-11-07 01:29:01,974 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:29:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16201 states. [2021-11-07 01:29:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16201 to 5903. [2021-11-07 01:29:02,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5903 states, 5902 states have (on average 1.508471704506947) internal successors, (8903), 5902 states have internal predecessors, (8903), 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 01:29:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5903 states to 5903 states and 8903 transitions. [2021-11-07 01:29:02,518 INFO L78 Accepts]: Start accepts. Automaton has 5903 states and 8903 transitions. Word has length 146 [2021-11-07 01:29:02,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:02,519 INFO L470 AbstractCegarLoop]: Abstraction has 5903 states and 8903 transitions. [2021-11-07 01:29:02,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.375) internal successors, (139), 8 states have internal predecessors, (139), 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 01:29:02,519 INFO L276 IsEmpty]: Start isEmpty. Operand 5903 states and 8903 transitions. [2021-11-07 01:29:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 01:29:02,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:02,526 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:02,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:02,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-11-07 01:29:02,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:02,940 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:02,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1595968646, now seen corresponding path program 1 times [2021-11-07 01:29:02,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:02,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750978528] [2021-11-07 01:29:02,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:02,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:02,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:02,945 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:02,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-07 01:29:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:09,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:29:09,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:29:10,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-07 01:29:11,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:11,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750978528] [2021-11-07 01:29:11,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1750978528] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:11,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1899373701] [2021-11-07 01:29:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:11,021 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:29:11,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:29:11,022 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:29:11,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-07 01:29:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:29:14,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:29:15,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:16,231 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:29:16,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1899373701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:16,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571265802] [2021-11-07 01:29:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:16,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:29:16,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:29:16,235 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:29:16,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 01:29:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1975 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:29:19,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:29:19,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:20,678 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-07 01:29:20,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571265802] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:29:20,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:29:20,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-11-07 01:29:20,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665019178] [2021-11-07 01:29:20,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 01:29:20,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 01:29:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-07 01:29:20,680 INFO L87 Difference]: Start difference. First operand 5903 states and 8903 transitions. Second operand has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 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 01:29:25,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:25,898 INFO L93 Difference]: Finished difference Result 34483 states and 51889 transitions. [2021-11-07 01:29:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:29:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 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 148 [2021-11-07 01:29:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:25,935 INFO L225 Difference]: With dead ends: 34483 [2021-11-07 01:29:25,935 INFO L226 Difference]: Without dead ends: 28591 [2021-11-07 01:29:25,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 887 GetRequests, 872 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-07 01:29:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28591 states. [2021-11-07 01:29:28,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28591 to 24976. [2021-11-07 01:29:28,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24976 states, 24975 states have (on average 1.5057857857857857) internal successors, (37607), 24975 states have internal predecessors, (37607), 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 01:29:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24976 states to 24976 states and 37607 transitions. [2021-11-07 01:29:28,158 INFO L78 Accepts]: Start accepts. Automaton has 24976 states and 37607 transitions. Word has length 148 [2021-11-07 01:29:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:28,159 INFO L470 AbstractCegarLoop]: Abstraction has 24976 states and 37607 transitions. [2021-11-07 01:29:28,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.083333333333336) internal successors, (385), 12 states have internal predecessors, (385), 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 01:29:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24976 states and 37607 transitions. [2021-11-07 01:29:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-07 01:29:28,171 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:28,172 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:28,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:28,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:28,642 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:28,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:29:28,786 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:28,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:28,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1786865237, now seen corresponding path program 1 times [2021-11-07 01:29:28,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:28,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853819179] [2021-11-07 01:29:28,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:28,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:28,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:28,791 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:28,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-07 01:29:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:35,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 2020 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 01:29:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:29:36,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-07 01:29:36,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:36,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853819179] [2021-11-07 01:29:36,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853819179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:36,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:36,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2021-11-07 01:29:36,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983936794] [2021-11-07 01:29:36,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:29:36,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:29:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:29:36,721 INFO L87 Difference]: Start difference. First operand 24976 states and 37607 transitions. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 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 01:29:44,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:29:44,288 INFO L93 Difference]: Finished difference Result 73815 states and 111500 transitions. [2021-11-07 01:29:44,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:29:44,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 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 157 [2021-11-07 01:29:44,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:29:44,362 INFO L225 Difference]: With dead ends: 73815 [2021-11-07 01:29:44,363 INFO L226 Difference]: Without dead ends: 48934 [2021-11-07 01:29:44,382 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:29:44,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48934 states. [2021-11-07 01:29:46,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48934 to 25096. [2021-11-07 01:29:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25096 states, 25095 states have (on average 1.5033672046224347) internal successors, (37727), 25095 states have internal predecessors, (37727), 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 01:29:46,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25096 states to 25096 states and 37727 transitions. [2021-11-07 01:29:46,663 INFO L78 Accepts]: Start accepts. Automaton has 25096 states and 37727 transitions. Word has length 157 [2021-11-07 01:29:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:29:46,664 INFO L470 AbstractCegarLoop]: Abstraction has 25096 states and 37727 transitions. [2021-11-07 01:29:46,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 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 01:29:46,664 INFO L276 IsEmpty]: Start isEmpty. Operand 25096 states and 37727 transitions. [2021-11-07 01:29:46,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-11-07 01:29:46,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:29:46,672 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:29:46,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-07 01:29:46,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:29:46,876 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:29:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:29:46,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1988623417, now seen corresponding path program 1 times [2021-11-07 01:29:46,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:29:46,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116207106] [2021-11-07 01:29:46,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:29:46,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:29:46,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:29:46,882 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:29:46,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-07 01:29:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:29:53,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 2031 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:29:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:29:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:29:54,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:29:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:29:54,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:29:54,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116207106] [2021-11-07 01:29:54,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116207106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:29:54,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:29:54,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:29:54,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130646320] [2021-11-07 01:29:54,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:29:54,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:29:54,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:29:54,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:29:54,660 INFO L87 Difference]: Start difference. First operand 25096 states and 37727 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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 01:30:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:03,930 INFO L93 Difference]: Finished difference Result 121173 states and 182555 transitions. [2021-11-07 01:30:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:30:03,931 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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 159 [2021-11-07 01:30:03,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:04,088 INFO L225 Difference]: With dead ends: 121173 [2021-11-07 01:30:04,088 INFO L226 Difference]: Without dead ends: 96172 [2021-11-07 01:30:04,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:30:04,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96172 states. [2021-11-07 01:30:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96172 to 25192. [2021-11-07 01:30:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25192 states, 25191 states have (on average 1.5014489301734746) internal successors, (37823), 25191 states have internal predecessors, (37823), 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 01:30:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25192 states to 25192 states and 37823 transitions. [2021-11-07 01:30:07,049 INFO L78 Accepts]: Start accepts. Automaton has 25192 states and 37823 transitions. Word has length 159 [2021-11-07 01:30:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:07,050 INFO L470 AbstractCegarLoop]: Abstraction has 25192 states and 37823 transitions. [2021-11-07 01:30:07,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 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 01:30:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 25192 states and 37823 transitions. [2021-11-07 01:30:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 01:30:07,060 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:07,060 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:07,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:07,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:07,273 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash 901102577, now seen corresponding path program 1 times [2021-11-07 01:30:07,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:07,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414497622] [2021-11-07 01:30:07,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:07,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:07,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:07,277 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:07,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-07 01:30:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:30:14,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 2050 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:30:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:30:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:30:15,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:30:16,056 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:30:16,056 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:30:16,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414497622] [2021-11-07 01:30:16,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414497622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:30:16,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:30:16,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 16 [2021-11-07 01:30:16,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335885200] [2021-11-07 01:30:16,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:30:16,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:30:16,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:30:16,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:30:16,058 INFO L87 Difference]: Start difference. First operand 25192 states and 37823 transitions. Second operand has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 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 01:30:50,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:30:50,282 INFO L93 Difference]: Finished difference Result 117285 states and 176843 transitions. [2021-11-07 01:30:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 01:30:50,284 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 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 162 [2021-11-07 01:30:50,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:30:50,417 INFO L225 Difference]: With dead ends: 117285 [2021-11-07 01:30:50,418 INFO L226 Difference]: Without dead ends: 92188 [2021-11-07 01:30:50,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2021-11-07 01:30:50,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92188 states. [2021-11-07 01:30:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92188 to 25336. [2021-11-07 01:30:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25336 states, 25335 states have (on average 1.4967041641997236) internal successors, (37919), 25335 states have internal predecessors, (37919), 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 01:30:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25336 states to 25336 states and 37919 transitions. [2021-11-07 01:30:53,970 INFO L78 Accepts]: Start accepts. Automaton has 25336 states and 37919 transitions. Word has length 162 [2021-11-07 01:30:53,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:30:53,971 INFO L470 AbstractCegarLoop]: Abstraction has 25336 states and 37919 transitions. [2021-11-07 01:30:53,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.9375) internal successors, (159), 16 states have internal predecessors, (159), 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 01:30:53,971 INFO L276 IsEmpty]: Start isEmpty. Operand 25336 states and 37919 transitions. [2021-11-07 01:30:53,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 01:30:53,981 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:30:53,981 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:30:54,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-07 01:30:54,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:30:54,182 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:30:54,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:30:54,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1132790044, now seen corresponding path program 1 times [2021-11-07 01:30:54,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:30:54,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586503589] [2021-11-07 01:30:54,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:30:54,186 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:30:54,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:30:54,188 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:30:54,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-07 01:31:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:01,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 2118 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:01,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:31:02,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:31:03,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:03,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586503589] [2021-11-07 01:31:03,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586503589] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:03,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:03,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:31:03,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035152778] [2021-11-07 01:31:03,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:31:03,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:03,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:31:03,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:31:03,386 INFO L87 Difference]: Start difference. First operand 25336 states and 37919 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 01:31:07,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:07,714 INFO L93 Difference]: Finished difference Result 42522 states and 63642 transitions. [2021-11-07 01:31:07,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:31:07,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 166 [2021-11-07 01:31:07,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:07,733 INFO L225 Difference]: With dead ends: 42522 [2021-11-07 01:31:07,733 INFO L226 Difference]: Without dead ends: 16795 [2021-11-07 01:31:07,743 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 328 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 01:31:07,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-11-07 01:31:09,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 16795. [2021-11-07 01:31:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16795 states, 16794 states have (on average 1.490055972371085) internal successors, (25024), 16794 states have internal predecessors, (25024), 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 01:31:09,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16795 states to 16795 states and 25024 transitions. [2021-11-07 01:31:09,911 INFO L78 Accepts]: Start accepts. Automaton has 16795 states and 25024 transitions. Word has length 166 [2021-11-07 01:31:09,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:09,911 INFO L470 AbstractCegarLoop]: Abstraction has 16795 states and 25024 transitions. [2021-11-07 01:31:09,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 4 states have internal predecessors, (266), 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 01:31:09,912 INFO L276 IsEmpty]: Start isEmpty. Operand 16795 states and 25024 transitions. [2021-11-07 01:31:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 01:31:09,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:09,916 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:31:09,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-11-07 01:31:10,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:10,116 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:10,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:10,117 INFO L85 PathProgramCache]: Analyzing trace with hash 976809502, now seen corresponding path program 1 times [2021-11-07 01:31:10,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:10,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [719149068] [2021-11-07 01:31:10,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:10,120 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:10,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:10,121 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:10,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-07 01:31:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:31:16,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 2117 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:31:16,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:31:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:31:17,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:31:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 01:31:17,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:31:17,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [719149068] [2021-11-07 01:31:17,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [719149068] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:31:17,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:31:17,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:31:17,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055291766] [2021-11-07 01:31:17,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:31:17,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:31:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:31:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:17,636 INFO L87 Difference]: Start difference. First operand 16795 states and 25024 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 01:31:20,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:31:20,853 INFO L93 Difference]: Finished difference Result 24870 states and 37036 transitions. [2021-11-07 01:31:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:31:20,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 166 [2021-11-07 01:31:20,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:31:20,864 INFO L225 Difference]: With dead ends: 24870 [2021-11-07 01:31:20,864 INFO L226 Difference]: Without dead ends: 8169 [2021-11-07 01:31:20,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:31:20,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-11-07 01:31:21,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 8169. [2021-11-07 01:31:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8169 states, 8168 states have (on average 1.487879529872674) internal successors, (12153), 8168 states have internal predecessors, (12153), 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 01:31:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8169 states to 8169 states and 12153 transitions. [2021-11-07 01:31:21,872 INFO L78 Accepts]: Start accepts. Automaton has 8169 states and 12153 transitions. Word has length 166 [2021-11-07 01:31:21,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:31:21,872 INFO L470 AbstractCegarLoop]: Abstraction has 8169 states and 12153 transitions. [2021-11-07 01:31:21,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 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 01:31:21,872 INFO L276 IsEmpty]: Start isEmpty. Operand 8169 states and 12153 transitions. [2021-11-07 01:31:21,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 01:31:21,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:31:21,876 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:31:21,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-07 01:31:22,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:31:22,080 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:31:22,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:31:22,081 INFO L85 PathProgramCache]: Analyzing trace with hash 769204907, now seen corresponding path program 1 times [2021-11-07 01:31:22,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:31:22,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140921531] [2021-11-07 01:31:22,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:31:22,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:31:22,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:31:22,086 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:31:22,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0aa7a423-36c9-406d-a524-1a102d67e79e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process