./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH --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 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:59:12,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:59:12,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:59:12,838 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:59:12,839 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:59:12,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:59:12,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:59:12,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:59:12,847 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:59:12,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:59:12,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:59:12,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:59:12,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:59:12,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:59:12,854 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:59:12,856 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:59:12,857 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:59:12,858 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:59:12,860 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:59:12,863 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:59:12,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:59:12,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:59:12,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:59:12,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:59:12,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:59:12,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:59:12,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:59:12,887 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:59:12,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:59:12,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:59:12,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:59:12,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:59:12,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:59:12,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:59:12,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:59:12,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:59:12,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:59:12,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:59:12,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:59:12,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:59:12,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:59:12,902 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-03 04:59:12,949 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:59:12,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:59:12,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:59:12,950 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:59:12,951 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:59:12,951 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:59:12,951 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:59:12,951 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:59:12,952 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:59:12,952 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:59:12,952 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:59:12,952 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:59:12,952 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:59:12,953 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:59:12,953 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:59:12,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:59:12,954 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:59:12,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:59:12,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:59:12,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:59:12,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:59:12,955 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:59:12,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:59:12,955 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:59:12,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:59:12,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:59:12,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:59:12,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:59:12,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:59:12,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:59:12,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:59:12,957 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:59:12,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:59:12,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:59:12,958 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:59:12,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:59:12,958 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_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 [2021-11-03 04:59:13,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:59:13,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:59:13,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:59:13,259 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:59:13,260 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:59:13,261 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-03 04:59:13,337 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data/73008e7ee/16a542b905d046c4904e3f867a10f841/FLAG0f99e1452 [2021-11-03 04:59:14,260 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:59:14,261 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-03 04:59:14,302 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data/73008e7ee/16a542b905d046c4904e3f867a10f841/FLAG0f99e1452 [2021-11-03 04:59:14,811 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data/73008e7ee/16a542b905d046c4904e3f867a10f841 [2021-11-03 04:59:14,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:59:14,817 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:59:14,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:59:14,820 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:59:14,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:59:14,824 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:59:14" (1/1) ... [2021-11-03 04:59:14,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b9262d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:14, skipping insertion in model container [2021-11-03 04:59:14,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:59:14" (1/1) ... [2021-11-03 04:59:14,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:59:14,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:59:15,725 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_b66742d9-888b-40e8-ae57-5ea69f340da2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-03 04:59:15,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:59:16,008 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) [2021-11-03 04:59:16,009 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5a36788b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:16, skipping insertion in model container [2021-11-03 04:59:16,009 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:59:16,010 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 04:59:16,012 INFO L168 Benchmark]: Toolchain (without parser) took 1194.19 ms. Allocated memory is still 109.1 MB. Free memory was 63.4 MB in the beginning and 46.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:59:16,013 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory was 88.2 MB in the beginning and 88.2 MB in the end (delta: 65.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:59:16,014 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1189.62 ms. Allocated memory is still 109.1 MB. Free memory was 63.2 MB in the beginning and 46.8 MB in the end (delta: 16.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:59:16,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 109.1 MB. Free memory was 88.2 MB in the beginning and 88.2 MB in the end (delta: 65.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 1189.62 ms. Allocated memory is still 109.1 MB. Free memory was 63.2 MB in the beginning and 46.8 MB in the end (delta: 16.4 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 5422]: 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_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH --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 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:59:18,265 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:59:18,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:59:18,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:59:18,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:59:18,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:59:18,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:59:18,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:59:18,337 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:59:18,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:59:18,346 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:59:18,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:59:18,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:59:18,350 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:59:18,352 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:59:18,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:59:18,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:59:18,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:59:18,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:59:18,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:59:18,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:59:18,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:59:18,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:59:18,375 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:59:18,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:59:18,384 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:59:18,384 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:59:18,386 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:59:18,387 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:59:18,388 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:59:18,388 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:59:18,390 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:59:18,391 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:59:18,392 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:59:18,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:59:18,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:59:18,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:59:18,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:59:18,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:59:18,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:59:18,409 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:59:18,414 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-03 04:59:18,458 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:59:18,458 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:59:18,459 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:59:18,460 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:59:18,460 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:59:18,460 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:59:18,460 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:59:18,461 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:59:18,461 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:59:18,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:59:18,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:59:18,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:59:18,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:59:18,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:59:18,465 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:59:18,466 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:59:18,466 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:59:18,466 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:59:18,466 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:59:18,467 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:59:18,467 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:59:18,467 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:59:18,467 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:59:18,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:59:18,468 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:59:18,468 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:59:18,468 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:59:18,468 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:59:18,469 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:59:18,469 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:59:18,469 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:59:18,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:59:18,470 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_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992626749f2e8ca84a93ad6fc64a197d6c8e66b412d995c24cf1e1136a1f2393 [2021-11-03 04:59:18,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:59:18,878 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:59:18,881 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:59:18,882 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:59:18,883 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:59:18,883 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-03 04:59:18,948 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data/ab170175a/6bfbcabb18bb418da588fddd02e8c9a1/FLAGdabe49169 [2021-11-03 04:59:19,900 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:59:19,900 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-03 04:59:19,940 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data/ab170175a/6bfbcabb18bb418da588fddd02e8c9a1/FLAGdabe49169 [2021-11-03 04:59:20,352 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/data/ab170175a/6bfbcabb18bb418da588fddd02e8c9a1 [2021-11-03 04:59:20,355 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:59:20,356 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:59:20,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:59:20,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:59:20,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:59:20,375 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:59:20" (1/1) ... [2021-11-03 04:59:20,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e3fc4ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:20, skipping insertion in model container [2021-11-03 04:59:20,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:59:20" (1/1) ... [2021-11-03 04:59:20,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:59:20,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:59:21,172 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_b66742d9-888b-40e8-ae57-5ea69f340da2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-03 04:59:21,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:59:21,429 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 04:59:21,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:59:21,678 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_b66742d9-888b-40e8-ae57-5ea69f340da2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-03 04:59:21,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:59:21,731 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:59:21,893 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_b66742d9-888b-40e8-ae57-5ea69f340da2/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i[154031,154044] [2021-11-03 04:59:22,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:59:22,049 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:59:22,049 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22 WrapperNode [2021-11-03 04:59:22,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:59:22,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:59:22,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:59:22,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:59:22,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,196 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:59:22,197 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:59:22,197 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:59:22,197 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:59:22,204 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,205 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,218 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,263 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,285 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,330 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:59:22,331 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:59:22,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:59:22,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:59:22,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (1/1) ... [2021-11-03 04:59:22,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:59:22,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:59:22,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:59:22,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:59:22,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 04:59:22,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-03 04:59:22,430 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:59:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-03 04:59:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-03 04:59:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-03 04:59:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-03 04:59:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-03 04:59:22,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-03 04:59:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-03 04:59:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:59:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:59:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:59:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-03 04:59:22,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-03 04:59:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-03 04:59:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:59:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-03 04:59:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-03 04:59:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-03 04:59:22,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:59:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:59:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-03 04:59:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:59:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-03 04:59:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-03 04:59:22,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:59:22,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:59:35,173 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:59:35,173 INFO L299 CfgBuilder]: Removed 166 assume(true) statements. [2021-11-03 04:59:35,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:59:35 BoogieIcfgContainer [2021-11-03 04:59:35,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:59:35,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:59:35,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:59:35,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:59:35,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:59:20" (1/3) ... [2021-11-03 04:59:35,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fe0bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:59:35, skipping insertion in model container [2021-11-03 04:59:35,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:59:22" (2/3) ... [2021-11-03 04:59:35,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79fe0bd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:59:35, skipping insertion in model container [2021-11-03 04:59:35,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:59:35" (3/3) ... [2021-11-03 04:59:35,183 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--capmode.ko-entry_point.cil.out.i [2021-11-03 04:59:35,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:59:35,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-03 04:59:35,237 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:59:35,243 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 [2021-11-03 04:59:35,243 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-03 04:59:35,265 INFO L276 IsEmpty]: Start isEmpty. Operand has 198 states, 196 states have (on average 1.5) internal successors, (294), 197 states have internal predecessors, (294), 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) [2021-11-03 04:59:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:59:35,273 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:35,274 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] [2021-11-03 04:59:35,275 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:35,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash 676168125, now seen corresponding path program 1 times [2021-11-03 04:59:35,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:35,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1619496476] [2021-11-03 04:59:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:35,300 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:35,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:35,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:35,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:59:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:35,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:59:35,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:35,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:35,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:35,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:35,829 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:35,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1619496476] [2021-11-03 04:59:35,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1619496476] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:35,831 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:35,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:59:35,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995971452] [2021-11-03 04:59:35,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:59:35,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:35,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:59:35,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:59:35,854 INFO L87 Difference]: Start difference. First operand has 198 states, 196 states have (on average 1.5) internal successors, (294), 197 states have internal predecessors, (294), 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 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 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) [2021-11-03 04:59:35,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:35,893 INFO L93 Difference]: Finished difference Result 392 states and 583 transitions. [2021-11-03 04:59:35,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:59:35,895 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 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 [2021-11-03 04:59:35,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:35,907 INFO L225 Difference]: With dead ends: 392 [2021-11-03 04:59:35,907 INFO L226 Difference]: Without dead ends: 191 [2021-11-03 04:59:35,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:59:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-03 04:59:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-03 04:59:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.368421052631579) internal successors, (260), 190 states have internal predecessors, (260), 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) [2021-11-03 04:59:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 260 transitions. [2021-11-03 04:59:35,959 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 260 transitions. Word has length 20 [2021-11-03 04:59:35,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:35,960 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 260 transitions. [2021-11-03 04:59:35,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.0) internal successors, (20), 2 states have internal predecessors, (20), 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) [2021-11-03 04:59:35,961 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 260 transitions. [2021-11-03 04:59:35,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 04:59:35,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:35,962 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] [2021-11-03 04:59:35,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:36,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:36,177 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:36,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash -912179777, now seen corresponding path program 1 times [2021-11-03 04:59:36,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:36,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520400095] [2021-11-03 04:59:36,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:36,185 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:36,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:36,186 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:36,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:59:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:36,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:59:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:36,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:36,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:36,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:59:36,773 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:36,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520400095] [2021-11-03 04:59:36,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520400095] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:36,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:36,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:59:36,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337294111] [2021-11-03 04:59:36,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:59:36,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:59:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:59:36,777 INFO L87 Difference]: Start difference. First operand 191 states and 260 transitions. 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) [2021-11-03 04:59:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:36,822 INFO L93 Difference]: Finished difference Result 375 states and 513 transitions. [2021-11-03 04:59:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:59:36,823 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 [2021-11-03 04:59:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:36,825 INFO L225 Difference]: With dead ends: 375 [2021-11-03 04:59:36,825 INFO L226 Difference]: Without dead ends: 192 [2021-11-03 04:59:36,827 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 [2021-11-03 04:59:36,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-03 04:59:36,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2021-11-03 04:59:36,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.3664921465968587) internal successors, (261), 191 states have internal predecessors, (261), 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) [2021-11-03 04:59:36,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 261 transitions. [2021-11-03 04:59:36,844 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 261 transitions. Word has length 20 [2021-11-03 04:59:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:36,844 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 261 transitions. [2021-11-03 04:59:36,844 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) [2021-11-03 04:59:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 261 transitions. [2021-11-03 04:59:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-03 04:59:36,846 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:36,846 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, 1] [2021-11-03 04:59:36,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:37,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:37,062 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:37,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2122365623, now seen corresponding path program 1 times [2021-11-03 04:59:37,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:37,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1414404723] [2021-11-03 04:59:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:37,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:37,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:37,065 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:37,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:59:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:59:37,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:59:37,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:59:37,524 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:37,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1414404723] [2021-11-03 04:59:37,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1414404723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:37,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:37,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:59:37,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124691890] [2021-11-03 04:59:37,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:59:37,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:37,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:59:37,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:59:37,527 INFO L87 Difference]: Start difference. First operand 192 states and 261 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) [2021-11-03 04:59:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:38,195 INFO L93 Difference]: Finished difference Result 691 states and 957 transitions. [2021-11-03 04:59:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:59:38,196 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 21 [2021-11-03 04:59:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:38,202 INFO L225 Difference]: With dead ends: 691 [2021-11-03 04:59:38,203 INFO L226 Difference]: Without dead ends: 509 [2021-11-03 04:59:38,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:59:38,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-03 04:59:38,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 509. [2021-11-03 04:59:38,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3838582677165354) internal successors, (703), 508 states have internal predecessors, (703), 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) [2021-11-03 04:59:38,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 703 transitions. [2021-11-03 04:59:38,271 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 703 transitions. Word has length 21 [2021-11-03 04:59:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:38,273 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 703 transitions. [2021-11-03 04:59:38,274 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) [2021-11-03 04:59:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 703 transitions. [2021-11-03 04:59:38,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-03 04:59:38,280 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:38,280 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:38,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:38,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:38,495 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:38,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:38,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1478100298, now seen corresponding path program 1 times [2021-11-03 04:59:38,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:38,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484736025] [2021-11-03 04:59:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:38,497 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:38,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:38,498 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:38,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:59:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:59:38,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:59:38,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:38,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:59:38,989 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:38,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484736025] [2021-11-03 04:59:38,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484736025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:38,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:38,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 04:59:38,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750952199] [2021-11-03 04:59:38,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:59:38,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:38,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:59:38,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:59:38,992 INFO L87 Difference]: Start difference. First operand 509 states and 703 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-11-03 04:59:39,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:39,067 INFO L93 Difference]: Finished difference Result 1013 states and 1403 transitions. [2021-11-03 04:59:39,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:59:39,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 28 [2021-11-03 04:59:39,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:39,071 INFO L225 Difference]: With dead ends: 1013 [2021-11-03 04:59:39,072 INFO L226 Difference]: Without dead ends: 514 [2021-11-03 04:59:39,073 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:59:39,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-11-03 04:59:39,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2021-11-03 04:59:39,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.3820662768031189) internal successors, (709), 513 states have internal predecessors, (709), 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) [2021-11-03 04:59:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 709 transitions. [2021-11-03 04:59:39,093 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 709 transitions. Word has length 28 [2021-11-03 04:59:39,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:39,093 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 709 transitions. [2021-11-03 04:59:39,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2021-11-03 04:59:39,094 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 709 transitions. [2021-11-03 04:59:39,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 04:59:39,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:39,095 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:39,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-03 04:59:39,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:39,309 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:39,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1488507908, now seen corresponding path program 1 times [2021-11-03 04:59:39,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:39,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1994131100] [2021-11-03 04:59:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:39,311 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:39,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:39,316 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:39,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 04:59:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:39,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:59:39,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:59:39,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:39,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:59:39,969 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:39,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1994131100] [2021-11-03 04:59:39,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1994131100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:59:39,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1273131467] [2021-11-03 04:59:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:39,970 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:59:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:59:39,976 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:59:39,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-11-03 04:59:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:40,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:59:40,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 04:59:40,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 04:59:40,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1273131467] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:40,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:59:40,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-03 04:59:40,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077247182] [2021-11-03 04:59:40,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:59:40,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:40,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:59:40,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-03 04:59:40,587 INFO L87 Difference]: Start difference. First operand 514 states and 709 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2021-11-03 04:59:40,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:40,694 INFO L93 Difference]: Finished difference Result 1017 states and 1405 transitions. [2021-11-03 04:59:40,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:59:40,695 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 36 [2021-11-03 04:59:40,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:40,718 INFO L225 Difference]: With dead ends: 1017 [2021-11-03 04:59:40,718 INFO L226 Difference]: Without dead ends: 513 [2021-11-03 04:59:40,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-03 04:59:40,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-11-03 04:59:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 513. [2021-11-03 04:59:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 1.376953125) internal successors, (705), 512 states have internal predecessors, (705), 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) [2021-11-03 04:59:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 705 transitions. [2021-11-03 04:59:40,744 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 705 transitions. Word has length 36 [2021-11-03 04:59:40,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:40,745 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 705 transitions. [2021-11-03 04:59:40,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2021-11-03 04:59:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 705 transitions. [2021-11-03 04:59:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 04:59:40,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:40,747 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 04:59:40,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:40,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:41,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:59:41,166 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:41,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:41,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1332267002, now seen corresponding path program 1 times [2021-11-03 04:59:41,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:41,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [275979937] [2021-11-03 04:59:41,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:41,168 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:41,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:41,173 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:41,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 04:59:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:41,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:59:41,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:41,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:59:41,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-03 04:59:42,010 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:42,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [275979937] [2021-11-03 04:59:42,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [275979937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:59:42,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [555137728] [2021-11-03 04:59:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:42,011 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:59:42,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:59:42,013 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:59:42,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-03 04:59:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:59:42,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:59:42,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:59:43,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [555137728] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:43,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:59:43,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5] total 13 [2021-11-03 04:59:43,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170537832] [2021-11-03 04:59:43,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-03 04:59:43,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-03 04:59:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-03 04:59:43,114 INFO L87 Difference]: Start difference. First operand 513 states and 705 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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) [2021-11-03 04:59:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:43,475 INFO L93 Difference]: Finished difference Result 1517 states and 2092 transitions. [2021-11-03 04:59:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 04:59:43,476 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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 51 [2021-11-03 04:59:43,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:43,482 INFO L225 Difference]: With dead ends: 1517 [2021-11-03 04:59:43,482 INFO L226 Difference]: Without dead ends: 1010 [2021-11-03 04:59:43,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-03 04:59:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-11-03 04:59:43,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 986. [2021-11-03 04:59:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.3776649746192893) internal successors, (1357), 985 states have internal predecessors, (1357), 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) [2021-11-03 04:59:43,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1357 transitions. [2021-11-03 04:59:43,551 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1357 transitions. Word has length 51 [2021-11-03 04:59:43,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:43,551 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 1357 transitions. [2021-11-03 04:59:43,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 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) [2021-11-03 04:59:43,552 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1357 transitions. [2021-11-03 04:59:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:59:43,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:43,555 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:43,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:43,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:43,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:43,959 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash 535464374, now seen corresponding path program 1 times [2021-11-03 04:59:43,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:43,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408417220] [2021-11-03 04:59:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:43,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:43,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:43,962 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:43,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 04:59:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 04:59:44,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:59:44,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-03 04:59:44,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:44,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408417220] [2021-11-03 04:59:44,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408417220] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:44,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:59:44,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 04:59:44,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801941068] [2021-11-03 04:59:44,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 04:59:44,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:44,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 04:59:44,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:59:44,862 INFO L87 Difference]: Start difference. First operand 986 states and 1357 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-03 04:59:44,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:44,982 INFO L93 Difference]: Finished difference Result 1753 states and 2417 transitions. [2021-11-03 04:59:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 04:59:44,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 76 [2021-11-03 04:59:44,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:44,988 INFO L225 Difference]: With dead ends: 1753 [2021-11-03 04:59:44,988 INFO L226 Difference]: Without dead ends: 777 [2021-11-03 04:59:44,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 04:59:44,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2021-11-03 04:59:45,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 730. [2021-11-03 04:59:45,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.3799725651577504) internal successors, (1006), 729 states have internal predecessors, (1006), 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) [2021-11-03 04:59:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1006 transitions. [2021-11-03 04:59:45,026 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1006 transitions. Word has length 76 [2021-11-03 04:59:45,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:45,027 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1006 transitions. [2021-11-03 04:59:45,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2021-11-03 04:59:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1006 transitions. [2021-11-03 04:59:45,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-03 04:59:45,030 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:45,030 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:45,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:45,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:45,240 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:45,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:45,241 INFO L85 PathProgramCache]: Analyzing trace with hash -106675824, now seen corresponding path program 2 times [2021-11-03 04:59:45,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:45,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718342416] [2021-11-03 04:59:45,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:59:45,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:45,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:45,246 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:45,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 04:59:46,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:59:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:59:46,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:59:46,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:46,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:59:46,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:59:47,074 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:47,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718342416] [2021-11-03 04:59:47,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718342416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:59:47,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1714934287] [2021-11-03 04:59:47,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 04:59:47,074 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:59:47,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:59:47,076 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:59:47,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-03 04:59:48,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 04:59:48,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 04:59:48,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 04:59:48,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:59:49,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:49,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:59:49,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1714934287] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:49,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 04:59:49,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 14 [2021-11-03 04:59:49,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283015414] [2021-11-03 04:59:49,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 04:59:49,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:49,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 04:59:49,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-03 04:59:49,485 INFO L87 Difference]: Start difference. First operand 730 states and 1006 transitions. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 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) [2021-11-03 04:59:50,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:50,317 INFO L93 Difference]: Finished difference Result 1577 states and 2182 transitions. [2021-11-03 04:59:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-03 04:59:50,318 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 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 76 [2021-11-03 04:59:50,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:50,323 INFO L225 Difference]: With dead ends: 1577 [2021-11-03 04:59:50,324 INFO L226 Difference]: Without dead ends: 870 [2021-11-03 04:59:50,325 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-03 04:59:50,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-11-03 04:59:50,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 730. [2021-11-03 04:59:50,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.3580246913580247) internal successors, (990), 729 states have internal predecessors, (990), 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) [2021-11-03 04:59:50,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 990 transitions. [2021-11-03 04:59:50,381 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 990 transitions. Word has length 76 [2021-11-03 04:59:50,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:50,383 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 990 transitions. [2021-11-03 04:59:50,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 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) [2021-11-03 04:59:50,384 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 990 transitions. [2021-11-03 04:59:50,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 04:59:50,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:50,386 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:50,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:50,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:50,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:59:50,797 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -504091861, now seen corresponding path program 1 times [2021-11-03 04:59:50,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:50,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032512119] [2021-11-03 04:59:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:50,798 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:50,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:50,800 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:50,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 04:59:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:51,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:59:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:59:51,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:59:51,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:59:51,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032512119] [2021-11-03 04:59:51,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032512119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:59:51,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [100322812] [2021-11-03 04:59:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:51,886 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:59:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:59:51,887 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:59:51,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-03 04:59:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:52,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 04:59:52,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:53,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:59:53,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 04:59:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [100322812] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 04:59:53,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722967528] [2021-11-03 04:59:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:53,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:59:53,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:59:53,260 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:59:53,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-03 04:59:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:59:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 04:59:53,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:59:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:59:54,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:59:55,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 04:59:55,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722967528] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:59:55,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 04:59:55,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5, 5, 5] total 24 [2021-11-03 04:59:55,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559932312] [2021-11-03 04:59:55,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 04:59:55,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:59:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 04:59:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-03 04:59:55,544 INFO L87 Difference]: Start difference. First operand 730 states and 990 transitions. Second operand has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 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) [2021-11-03 04:59:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:59:58,884 INFO L93 Difference]: Finished difference Result 2104 states and 2880 transitions. [2021-11-03 04:59:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 04:59:58,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 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 78 [2021-11-03 04:59:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:59:58,892 INFO L225 Difference]: With dead ends: 2104 [2021-11-03 04:59:58,893 INFO L226 Difference]: Without dead ends: 1397 [2021-11-03 04:59:58,895 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 444 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 04:59:58,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-11-03 04:59:58,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 726. [2021-11-03 04:59:58,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 1.3489655172413793) internal successors, (978), 725 states have internal predecessors, (978), 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) [2021-11-03 04:59:58,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 978 transitions. [2021-11-03 04:59:58,974 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 978 transitions. Word has length 78 [2021-11-03 04:59:58,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:59:58,974 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 978 transitions. [2021-11-03 04:59:58,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.0) internal successors, (90), 18 states have internal predecessors, (90), 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) [2021-11-03 04:59:58,975 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 978 transitions. [2021-11-03 04:59:58,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-03 04:59:58,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:59:58,977 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:59:58,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:59,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:59,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-03 04:59:59,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:59:59,583 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:59:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:59:59,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1919876640, now seen corresponding path program 1 times [2021-11-03 04:59:59,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:59:59,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2128957057] [2021-11-03 04:59:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:59:59,585 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:59:59,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:59:59,586 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:59:59,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:00:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:00,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:00,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:00:00,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:00:00,786 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:00,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2128957057] [2021-11-03 05:00:00,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2128957057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:00,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1542235204] [2021-11-03 05:00:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:00,786 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:00:00,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:00:00,800 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:00:00,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:00:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:01,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:01,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:00:01,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:02,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:00:02,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1542235204] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:02,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101106622] [2021-11-03 05:00:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:02,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:00:02,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:00:02,177 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:00:02,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 05:00:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:02,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-03 05:00:02,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:00:03,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:04,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:00:04,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101106622] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:00:04,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 05:00:04,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [5, 5, 5, 5] total 24 [2021-11-03 05:00:04,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582639244] [2021-11-03 05:00:04,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 05:00:04,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:04,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 05:00:04,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-11-03 05:00:04,387 INFO L87 Difference]: Start difference. First operand 726 states and 978 transitions. Second operand has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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) [2021-11-03 05:00:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:06,970 INFO L93 Difference]: Finished difference Result 2016 states and 2728 transitions. [2021-11-03 05:00:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-03 05:00:06,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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 81 [2021-11-03 05:00:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:06,978 INFO L225 Difference]: With dead ends: 2016 [2021-11-03 05:00:06,979 INFO L226 Difference]: Without dead ends: 1313 [2021-11-03 05:00:06,981 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 462 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=341, Invalid=1299, Unknown=0, NotChecked=0, Total=1640 [2021-11-03 05:00:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-11-03 05:00:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 718. [2021-11-03 05:00:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 1.3417015341701535) internal successors, (962), 717 states have internal predecessors, (962), 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) [2021-11-03 05:00:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 962 transitions. [2021-11-03 05:00:07,062 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 962 transitions. Word has length 81 [2021-11-03 05:00:07,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:07,062 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 962 transitions. [2021-11-03 05:00:07,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.166666666666667) internal successors, (93), 18 states have internal predecessors, (93), 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) [2021-11-03 05:00:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 962 transitions. [2021-11-03 05:00:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-03 05:00:07,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:07,065 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:00:07,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:07,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-11-03 05:00:07,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:07,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:00:07,680 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:00:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:07,681 INFO L85 PathProgramCache]: Analyzing trace with hash 799245474, now seen corresponding path program 1 times [2021-11-03 05:00:07,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:07,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298577958] [2021-11-03 05:00:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:07,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:07,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:07,682 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:07,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:00:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:08,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:08,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:00:08,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:00:09,218 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:09,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298577958] [2021-11-03 05:00:09,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298577958] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:09,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [621460692] [2021-11-03 05:00:09,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:09,219 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:00:09,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:00:09,219 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:00:09,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 05:00:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:10,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:10,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:10,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:00:10,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-03 05:00:10,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [621460692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:10,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531103713] [2021-11-03 05:00:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:10,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:00:10,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:00:10,980 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:00:10,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 05:00:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:11,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:00:11,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:00:12,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:12,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:00:12,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531103713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:00:12,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 05:00:12,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-11-03 05:00:12,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808581350] [2021-11-03 05:00:12,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:00:12,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:12,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:00:12,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:00:12,265 INFO L87 Difference]: Start difference. First operand 718 states and 962 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2021-11-03 05:00:30,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:30,662 INFO L93 Difference]: Finished difference Result 1417 states and 1904 transitions. [2021-11-03 05:00:30,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:00:30,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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 92 [2021-11-03 05:00:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:30,668 INFO L225 Difference]: With dead ends: 1417 [2021-11-03 05:00:30,668 INFO L226 Difference]: Without dead ends: 722 [2021-11-03 05:00:30,669 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:00:30,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-03 05:00:30,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2021-11-03 05:00:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.3398058252427185) internal successors, (966), 721 states have internal predecessors, (966), 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) [2021-11-03 05:00:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 966 transitions. [2021-11-03 05:00:30,741 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 966 transitions. Word has length 92 [2021-11-03 05:00:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:30,742 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 966 transitions. [2021-11-03 05:00:30,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2021-11-03 05:00:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 966 transitions. [2021-11-03 05:00:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-03 05:00:30,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:30,744 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:00:30,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:30,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:31,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:31,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:00:31,372 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:00:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:31,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1886124263, now seen corresponding path program 1 times [2021-11-03 05:00:31,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:31,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [19086312] [2021-11-03 05:00:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:31,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:31,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:31,375 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:31,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:00:32,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:32,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:32,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:32,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:00:32,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:00:32,855 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:32,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [19086312] [2021-11-03 05:00:32,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [19086312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:32,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [488993317] [2021-11-03 05:00:32,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:32,856 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:00:32,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:00:32,856 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:00:32,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 05:00:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:34,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:34,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:00:34,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:00:34,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [488993317] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:34,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134481571] [2021-11-03 05:00:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:34,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:00:34,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:00:34,777 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:00:34,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-03 05:00:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:00:35,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:00:36,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-03 05:00:36,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134481571] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:00:36,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 05:00:36,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5, 5, 5] total 12 [2021-11-03 05:00:36,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176790637] [2021-11-03 05:00:36,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:00:36,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:00:36,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:00:36,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:00:36,268 INFO L87 Difference]: Start difference. First operand 722 states and 966 transitions. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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) [2021-11-03 05:00:54,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:00:54,784 INFO L93 Difference]: Finished difference Result 1936 states and 2586 transitions. [2021-11-03 05:00:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:00:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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 93 [2021-11-03 05:00:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:00:54,793 INFO L225 Difference]: With dead ends: 1936 [2021-11-03 05:00:54,793 INFO L226 Difference]: Without dead ends: 1237 [2021-11-03 05:00:54,795 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:00:54,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1237 states. [2021-11-03 05:00:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1237 to 730. [2021-11-03 05:00:54,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 1.336076817558299) internal successors, (974), 729 states have internal predecessors, (974), 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) [2021-11-03 05:00:54,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 974 transitions. [2021-11-03 05:00:54,900 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 974 transitions. Word has length 93 [2021-11-03 05:00:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:00:54,900 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 974 transitions. [2021-11-03 05:00:54,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 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) [2021-11-03 05:00:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 974 transitions. [2021-11-03 05:00:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-03 05:00:54,903 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:00:54,903 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:00:54,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:55,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:55,330 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:00:55,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:00:55,524 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:00:55,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:00:55,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1803856903, now seen corresponding path program 1 times [2021-11-03 05:00:55,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:00:55,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907732970] [2021-11-03 05:00:55,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:55,526 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:00:55,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:00:55,527 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:00:55,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:00:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:56,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:56,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:56,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 05:00:56,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 05:00:57,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:00:57,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907732970] [2021-11-03 05:00:57,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907732970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:57,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928422358] [2021-11-03 05:00:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:57,110 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:00:57,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:00:57,111 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:00:57,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-03 05:00:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:00:58,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:00:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:00:58,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 05:00:58,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:00:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 05:00:59,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1928422358] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:00:59,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029727895] [2021-11-03 05:00:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:00:59,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:00:59,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:00:59,208 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:00:59,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-03 05:01:00,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:00,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:01:00,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:01:00,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:01:01,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029727895] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:01,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-11-03 05:01:01,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 14 [2021-11-03 05:01:01,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705273599] [2021-11-03 05:01:01,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:01:01,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:01:01,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:01:01,218 INFO L87 Difference]: Start difference. First operand 730 states and 974 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 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) [2021-11-03 05:01:04,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:04,485 INFO L93 Difference]: Finished difference Result 5681 states and 7612 transitions. [2021-11-03 05:01:04,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-03 05:01:04,486 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 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 95 [2021-11-03 05:01:04,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:04,515 INFO L225 Difference]: With dead ends: 5681 [2021-11-03 05:01:04,515 INFO L226 Difference]: Without dead ends: 5310 [2021-11-03 05:01:04,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 552 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-03 05:01:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5310 states. [2021-11-03 05:01:04,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5310 to 2166. [2021-11-03 05:01:04,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2166 states, 2165 states have (on average 1.3404157043879907) internal successors, (2902), 2165 states have internal predecessors, (2902), 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) [2021-11-03 05:01:04,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2166 states to 2166 states and 2902 transitions. [2021-11-03 05:01:04,873 INFO L78 Accepts]: Start accepts. Automaton has 2166 states and 2902 transitions. Word has length 95 [2021-11-03 05:01:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:04,874 INFO L470 AbstractCegarLoop]: Abstraction has 2166 states and 2902 transitions. [2021-11-03 05:01:04,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 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) [2021-11-03 05:01:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2166 states and 2902 transitions. [2021-11-03 05:01:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-11-03 05:01:04,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:04,877 INFO L513 BasicCegarLoop]: trace histogram [3, 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] [2021-11-03 05:01:04,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:05,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:05,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:05,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:01:05,501 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:01:05,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:05,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1084573562, now seen corresponding path program 1 times [2021-11-03 05:01:05,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:05,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421801740] [2021-11-03 05:01:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:05,502 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:05,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:05,503 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:05,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:01:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:06,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:01:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:06,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 05:01:06,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:07,261 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-03 05:01:07,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:07,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421801740] [2021-11-03 05:01:07,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421801740] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:07,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1008069297] [2021-11-03 05:01:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:07,262 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:01:07,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:01:07,264 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:01:07,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-03 05:01:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:08,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:01:08,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:01:08,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-03 05:01:09,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1008069297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:01:09,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:01:09,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 12 [2021-11-03 05:01:09,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090397447] [2021-11-03 05:01:09,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:01:09,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:09,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:01:09,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:01:09,199 INFO L87 Difference]: Start difference. First operand 2166 states and 2902 transitions. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-11-03 05:01:10,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:10,589 INFO L93 Difference]: Finished difference Result 11840 states and 15850 transitions. [2021-11-03 05:01:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-03 05:01:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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 97 [2021-11-03 05:01:10,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:10,629 INFO L225 Difference]: With dead ends: 11840 [2021-11-03 05:01:10,630 INFO L226 Difference]: Without dead ends: 9697 [2021-11-03 05:01:10,635 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 375 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:01:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9697 states. [2021-11-03 05:01:11,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9697 to 2354. [2021-11-03 05:01:11,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2354 states, 2353 states have (on average 1.350616234594135) internal successors, (3178), 2353 states have internal predecessors, (3178), 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) [2021-11-03 05:01:11,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2354 states to 2354 states and 3178 transitions. [2021-11-03 05:01:11,066 INFO L78 Accepts]: Start accepts. Automaton has 2354 states and 3178 transitions. Word has length 97 [2021-11-03 05:01:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:11,066 INFO L470 AbstractCegarLoop]: Abstraction has 2354 states and 3178 transitions. [2021-11-03 05:01:11,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 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) [2021-11-03 05:01:11,067 INFO L276 IsEmpty]: Start isEmpty. Operand 2354 states and 3178 transitions. [2021-11-03 05:01:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-03 05:01:11,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:11,072 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:01:11,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:11,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:11,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:01:11,479 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:01:11,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1656975201, now seen corresponding path program 1 times [2021-11-03 05:01:11,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:11,480 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [212305862] [2021-11-03 05:01:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:11,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:11,481 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:11,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 05:01:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:12,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:01:12,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:13,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:01:13,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:01:13,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:13,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [212305862] [2021-11-03 05:01:13,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [212305862] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:13,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [345440906] [2021-11-03 05:01:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:13,313 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:01:13,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:01:13,314 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:01:13,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 05:01:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:15,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-03 05:01:15,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:01:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:15,650 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-03 05:01:15,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [345440906] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:15,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581058174] [2021-11-03 05:01:15,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:01:15,651 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:01:15,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:01:15,652 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:01:15,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 05:01:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:01:17,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:01:17,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:01:17,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:01:17,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581058174] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:17,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:01:17,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 4, 4] total 12 [2021-11-03 05:01:17,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634549706] [2021-11-03 05:01:17,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-03 05:01:17,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:17,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-03 05:01:17,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:01:17,583 INFO L87 Difference]: Start difference. First operand 2354 states and 3178 transitions. Second operand has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 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) [2021-11-03 05:01:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:01:38,730 INFO L93 Difference]: Finished difference Result 4805 states and 6520 transitions. [2021-11-03 05:01:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:01:38,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 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 99 [2021-11-03 05:01:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:01:38,744 INFO L225 Difference]: With dead ends: 4805 [2021-11-03 05:01:38,744 INFO L226 Difference]: Without dead ends: 2474 [2021-11-03 05:01:38,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:01:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2021-11-03 05:01:39,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 2474. [2021-11-03 05:01:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2474 states, 2473 states have (on average 1.343307723412859) internal successors, (3322), 2473 states have internal predecessors, (3322), 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) [2021-11-03 05:01:39,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2474 states to 2474 states and 3322 transitions. [2021-11-03 05:01:39,132 INFO L78 Accepts]: Start accepts. Automaton has 2474 states and 3322 transitions. Word has length 99 [2021-11-03 05:01:39,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:01:39,132 INFO L470 AbstractCegarLoop]: Abstraction has 2474 states and 3322 transitions. [2021-11-03 05:01:39,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.0) internal successors, (156), 12 states have internal predecessors, (156), 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) [2021-11-03 05:01:39,132 INFO L276 IsEmpty]: Start isEmpty. Operand 2474 states and 3322 transitions. [2021-11-03 05:01:39,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-03 05:01:39,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:01:39,136 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 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] [2021-11-03 05:01:39,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:39,359 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:39,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-03 05:01:39,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:01:39,752 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:01:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:01:39,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1792831333, now seen corresponding path program 2 times [2021-11-03 05:01:39,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:01:39,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373926024] [2021-11-03 05:01:39,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:01:39,754 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:01:39,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:01:39,755 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:01:39,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 05:01:41,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:01:41,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:01:42,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:01:42,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:01:42,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:01:43,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:01:43,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373926024] [2021-11-03 05:01:43,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373926024] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:43,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1236185091] [2021-11-03 05:01:43,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:01:43,064 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:01:43,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:01:43,076 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:01:43,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-03 05:01:46,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:01:46,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:01:46,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-03 05:01:46,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:01:46,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-03 05:01:47,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1236185091] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:47,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111913376] [2021-11-03 05:01:47,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:01:47,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:01:47,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:01:47,032 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:01:47,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-03 05:01:49,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:01:49,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:01:49,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:01:49,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:01:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-03 05:01:49,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:01:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-03 05:01:50,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111913376] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:01:50,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:01:50,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 6, 6] total 24 [2021-11-03 05:01:50,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340684137] [2021-11-03 05:01:50,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-03 05:01:50,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:01:50,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-03 05:01:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-11-03 05:01:50,535 INFO L87 Difference]: Start difference. First operand 2474 states and 3322 transitions. Second operand has 24 states, 24 states have (on average 8.0) internal successors, (192), 24 states have internal predecessors, (192), 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) [2021-11-03 05:02:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:02:15,624 INFO L93 Difference]: Finished difference Result 7390 states and 9940 transitions. [2021-11-03 05:02:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-03 05:02:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 8.0) internal successors, (192), 24 states have internal predecessors, (192), 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 117 [2021-11-03 05:02:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:02:15,637 INFO L225 Difference]: With dead ends: 7390 [2021-11-03 05:02:15,637 INFO L226 Difference]: Without dead ends: 4939 [2021-11-03 05:02:15,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 691 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-11-03 05:02:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4939 states. [2021-11-03 05:02:15,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4939 to 2570. [2021-11-03 05:02:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2570 states, 2569 states have (on average 1.335149863760218) internal successors, (3430), 2569 states have internal predecessors, (3430), 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) [2021-11-03 05:02:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2570 states to 2570 states and 3430 transitions. [2021-11-03 05:02:15,974 INFO L78 Accepts]: Start accepts. Automaton has 2570 states and 3430 transitions. Word has length 117 [2021-11-03 05:02:15,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:02:15,975 INFO L470 AbstractCegarLoop]: Abstraction has 2570 states and 3430 transitions. [2021-11-03 05:02:15,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 8.0) internal successors, (192), 24 states have internal predecessors, (192), 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) [2021-11-03 05:02:15,975 INFO L276 IsEmpty]: Start isEmpty. Operand 2570 states and 3430 transitions. [2021-11-03 05:02:15,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-03 05:02:15,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:02:15,979 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 3, 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] [2021-11-03 05:02:16,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:16,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-03 05:02:16,402 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-03 05:02:16,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:02:16,592 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:02:16,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:02:16,593 INFO L85 PathProgramCache]: Analyzing trace with hash 480375063, now seen corresponding path program 3 times [2021-11-03 05:02:16,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:02:16,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619976022] [2021-11-03 05:02:16,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:02:16,594 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:02:16,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:02:16,595 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:02:16,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-03 05:02:37,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-03 05:02:37,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:02:38,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 05:02:38,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:02:38,677 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-03 05:02:38,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:02:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-11-03 05:02:39,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:02:39,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619976022] [2021-11-03 05:02:39,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619976022] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:02:39,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1373074098] [2021-11-03 05:02:39,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:02:39,811 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:02:39,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:02:39,811 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:02:39,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b66742d9-888b-40e8-ae57-5ea69f340da2/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process