./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:02:04,906 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:04,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:04,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:04,961 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:04,966 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:04,968 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:04,972 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:04,974 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:04,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:04,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:04,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:04,983 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:04,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:04,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:04,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:04,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:04,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:04,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:05,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:05,006 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:05,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:05,011 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:05,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:05,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:05,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:05,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:05,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:05,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:05,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:05,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:05,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:05,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:05,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:05,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:05,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:05,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:05,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:05,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:05,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:05,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:05,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-07 02:02:05,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:05,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:05,079 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:05,080 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:05,080 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:05,080 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:05,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:02:05,080 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:05,081 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:05,081 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:02:05,082 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:02:05,082 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:05,082 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:02:05,082 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:02:05,083 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:02:05,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:05,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:02:05,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:05,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:02:05,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:05,084 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:02:05,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:05,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:02:05,085 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:05,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:02:05,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:05,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:05,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:05,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:05,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:05,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:02:05,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:02:05,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:02:05,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:02:05,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:05,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:05,089 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_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b [2021-11-07 02:02:05,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:05,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:05,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:05,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:05,396 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:05,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:02:05,459 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data/41c7e25e2/ff9c86bf70c542299b5ef8a619d92771/FLAG9d9b70d72 [2021-11-07 02:02:06,150 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:06,151 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:02:06,183 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data/41c7e25e2/ff9c86bf70c542299b5ef8a619d92771/FLAG9d9b70d72 [2021-11-07 02:02:06,285 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data/41c7e25e2/ff9c86bf70c542299b5ef8a619d92771 [2021-11-07 02:02:06,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:06,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:06,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:06,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:06,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:06,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:06" (1/1) ... [2021-11-07 02:02:06,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5686159b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:06, skipping insertion in model container [2021-11-07 02:02:06,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:06" (1/1) ... [2021-11-07 02:02:06,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:06,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:07,202 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_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-07 02:02:07,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:07,261 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:02:07,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@44f48330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:07, skipping insertion in model container [2021-11-07 02:02:07,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:07,262 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:02:07,264 INFO L168 Benchmark]: Toolchain (without parser) took 971.94 ms. Allocated memory is still 113.2 MB. Free memory was 66.7 MB in the beginning and 60.4 MB in the end (delta: 6.3 MB). Peak memory consumption was 10.6 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:07,265 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 88.2 MB in the end (delta: 66.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:02:07,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 966.61 ms. Allocated memory is still 113.2 MB. Free memory was 66.5 MB in the beginning and 60.4 MB in the end (delta: 6.1 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:07,267 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 88.2 MB in the end (delta: 66.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 966.61 ms. Allocated memory is still 113.2 MB. Free memory was 66.5 MB in the beginning and 60.4 MB in the end (delta: 6.1 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 3621]: 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_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:02:09,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:09,401 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:09,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:09,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:09,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:09,449 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:09,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:09,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:09,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:09,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:09,475 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:09,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:09,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:09,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:09,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:09,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:09,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:09,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:09,495 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:09,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:09,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:09,507 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:09,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:09,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:09,518 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:09,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:09,519 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:09,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:09,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:09,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:09,524 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:09,526 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:09,527 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:09,529 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:09,529 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:09,530 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:09,530 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:09,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:09,533 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:09,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:09,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-64bit-Taipan_Bitvector.epf [2021-11-07 02:02:09,580 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:09,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:09,581 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:09,582 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:09,582 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:09,582 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:09,582 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:09,583 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:09,583 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:09,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:09,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:09,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:02:09,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:09,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:02:09,587 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:09,587 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:02:09,587 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:02:09,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:02:09,587 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:09,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:02:09,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:09,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:02:09,588 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:09,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:09,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:09,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:09,589 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:02:09,590 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:02:09,590 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:09,590 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:02:09,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:09,591 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:09,591 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_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8bd4d18c7774801c1dd2fcc01cd37afd9da2c99096cf08f4bd160d17156b286b [2021-11-07 02:02:09,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:10,012 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:10,015 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:10,016 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:10,017 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:10,018 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:02:10,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data/2ff8310ca/b4408d98cc5d40479c3759d5f9a3e347/FLAG7be8c87bb [2021-11-07 02:02:10,954 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:10,956 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:02:10,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data/2ff8310ca/b4408d98cc5d40479c3759d5f9a3e347/FLAG7be8c87bb [2021-11-07 02:02:11,055 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/data/2ff8310ca/b4408d98cc5d40479c3759d5f9a3e347 [2021-11-07 02:02:11,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:11,059 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:11,066 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:11,066 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:11,070 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:11,071 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:11" (1/1) ... [2021-11-07 02:02:11,072 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76da9c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:11, skipping insertion in model container [2021-11-07 02:02:11,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:11" (1/1) ... [2021-11-07 02:02:11,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:11,172 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:11,987 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_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-07 02:02:12,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:12,060 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:02:12,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:12,193 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_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-07 02:02:12,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:12,213 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:02:12,351 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_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i[113815,113828] [2021-11-07 02:02:12,361 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:12,400 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:02:12,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12 WrapperNode [2021-11-07 02:02:12,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:12,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:12,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:02:12,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:02:12,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,443 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,536 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:12,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:02:12,537 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:02:12,537 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:02:12,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,603 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,617 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:02:12,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:02:12,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:02:12,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:02:12,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (1/1) ... [2021-11-07 02:02:12,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:12,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:12,679 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:02:12,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:02:12,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:02:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-07 02:02:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:02:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-07 02:02:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:02:12,726 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:02:12,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:02:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:02:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-07 02:02:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-07 02:02:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:02:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:02:12,729 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-07 02:02:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-07 02:02:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:02:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-07 02:02:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-07 02:02:12,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:02:12,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:02:20,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:02:20,705 INFO L299 CfgBuilder]: Removed 194 assume(true) statements. [2021-11-07 02:02:20,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:20 BoogieIcfgContainer [2021-11-07 02:02:20,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:02:20,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:02:20,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:02:20,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:02:20,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:02:11" (1/3) ... [2021-11-07 02:02:20,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2847ac4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:20, skipping insertion in model container [2021-11-07 02:02:20,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:12" (2/3) ... [2021-11-07 02:02:20,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2847ac4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:02:20, skipping insertion in model container [2021-11-07 02:02:20,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:02:20" (3/3) ... [2021-11-07 02:02:20,716 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a450319-1-144_1a-drivers--input--tablet--acecad.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-07 02:02:20,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:02:20,722 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-11-07 02:02:20,780 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:02:20,786 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:02:20,786 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-11-07 02:02:20,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 179 states, 174 states have (on average 1.396551724137931) internal successors, (243), 178 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:20,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:02:20,811 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:20,812 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:20,812 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:20,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:20,820 INFO L85 PathProgramCache]: Analyzing trace with hash -218290634, now seen corresponding path program 1 times [2021-11-07 02:02:20,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:20,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280494009] [2021-11-07 02:02:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:20,834 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:20,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:20,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:20,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:02:21,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:21,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:02:21,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:21,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:21,556 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:21,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280494009] [2021-11-07 02:02:21,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280494009] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:21,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:21,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:02:21,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448416886] [2021-11-07 02:02:21,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:02:21,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:02:21,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:02:21,581 INFO L87 Difference]: Start difference. First operand has 179 states, 174 states have (on average 1.396551724137931) internal successors, (243), 178 states have internal predecessors, (243), 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 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:21,616 INFO L93 Difference]: Finished difference Result 354 states and 481 transitions. [2021-11-07 02:02:21,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:02:21,618 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 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 17 [2021-11-07 02:02:21,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:21,631 INFO L225 Difference]: With dead ends: 354 [2021-11-07 02:02:21,634 INFO L226 Difference]: Without dead ends: 171 [2021-11-07 02:02:21,638 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:02:21,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-11-07 02:02:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-11-07 02:02:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 167 states have (on average 1.311377245508982) internal successors, (219), 170 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2021-11-07 02:02:21,719 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 17 [2021-11-07 02:02:21,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:21,719 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2021-11-07 02:02:21,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2021-11-07 02:02:21,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 02:02:21,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:21,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:21,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:02:21,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:21,940 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1229407884, now seen corresponding path program 1 times [2021-11-07 02:02:21,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:21,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1723425805] [2021-11-07 02:02:21,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:21,944 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:21,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:21,946 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:21,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:02:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:22,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:22,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:22,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:22,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:22,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:22,469 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:22,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1723425805] [2021-11-07 02:02:22,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1723425805] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:22,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:22,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:02:22,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323373334] [2021-11-07 02:02:22,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:02:22,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:22,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:02:22,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:22,474 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:22,818 INFO L93 Difference]: Finished difference Result 610 states and 799 transitions. [2021-11-07 02:02:22,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:02:22,819 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 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 17 [2021-11-07 02:02:22,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:22,824 INFO L225 Difference]: With dead ends: 610 [2021-11-07 02:02:22,824 INFO L226 Difference]: Without dead ends: 446 [2021-11-07 02:02:22,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:02:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-11-07 02:02:22,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2021-11-07 02:02:22,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 442 states have (on average 1.3190045248868778) internal successors, (583), 445 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 583 transitions. [2021-11-07 02:02:22,868 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 583 transitions. Word has length 17 [2021-11-07 02:02:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:22,869 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 583 transitions. [2021-11-07 02:02:22,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 583 transitions. [2021-11-07 02:02:22,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:02:22,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:22,871 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, 1] [2021-11-07 02:02:22,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:23,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:23,087 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:23,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:23,087 INFO L85 PathProgramCache]: Analyzing trace with hash 994747557, now seen corresponding path program 1 times [2021-11-07 02:02:23,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:23,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865362595] [2021-11-07 02:02:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:23,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:23,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:23,092 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:23,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:02:23,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:23,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:23,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:23,706 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:23,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865362595] [2021-11-07 02:02:23,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1865362595] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:23,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:23,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:02:23,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180741005] [2021-11-07 02:02:23,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:23,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:23,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:23,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:23,712 INFO L87 Difference]: Start difference. First operand 446 states and 583 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:23,901 INFO L93 Difference]: Finished difference Result 1189 states and 1554 transitions. [2021-11-07 02:02:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:02:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 02:02:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:23,907 INFO L225 Difference]: With dead ends: 1189 [2021-11-07 02:02:23,908 INFO L226 Difference]: Without dead ends: 750 [2021-11-07 02:02:23,912 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:02:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-11-07 02:02:23,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 449. [2021-11-07 02:02:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 445 states have (on average 1.3146067415730338) internal successors, (585), 448 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 585 transitions. [2021-11-07 02:02:23,957 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 585 transitions. Word has length 29 [2021-11-07 02:02:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:23,958 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 585 transitions. [2021-11-07 02:02:23,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 585 transitions. [2021-11-07 02:02:23,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 02:02:23,960 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:23,960 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, 1] [2021-11-07 02:02:23,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:24,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:24,177 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:24,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:24,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1525212377, now seen corresponding path program 1 times [2021-11-07 02:02:24,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:24,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1814905033] [2021-11-07 02:02:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:24,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:24,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:24,183 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:24,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:02:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:24,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:24,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:24,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:24,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:24,884 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:24,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1814905033] [2021-11-07 02:02:24,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1814905033] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:24,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:24,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:02:24,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764637858] [2021-11-07 02:02:24,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:24,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:24,886 INFO L87 Difference]: Start difference. First operand 449 states and 585 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:24,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:24,984 INFO L93 Difference]: Finished difference Result 1322 states and 1732 transitions. [2021-11-07 02:02:24,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 02:02:24,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:24,990 INFO L225 Difference]: With dead ends: 1322 [2021-11-07 02:02:24,991 INFO L226 Difference]: Without dead ends: 880 [2021-11-07 02:02:24,992 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2021-11-07 02:02:25,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2021-11-07 02:02:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 876 states have (on average 1.3093607305936072) internal successors, (1147), 879 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1147 transitions. [2021-11-07 02:02:25,087 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1147 transitions. Word has length 29 [2021-11-07 02:02:25,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:25,087 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1147 transitions. [2021-11-07 02:02:25,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 2 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1147 transitions. [2021-11-07 02:02:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 02:02:25,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:25,089 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, 1, 1] [2021-11-07 02:02:25,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:25,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:25,307 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:25,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:25,308 INFO L85 PathProgramCache]: Analyzing trace with hash -36936870, now seen corresponding path program 1 times [2021-11-07 02:02:25,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:25,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1503308961] [2021-11-07 02:02:25,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:25,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:25,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:25,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:25,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:02:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:25,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:26,007 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:26,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1503308961] [2021-11-07 02:02:26,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1503308961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:26,008 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:26,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:02:26,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176875356] [2021-11-07 02:02:26,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:26,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:26,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:26,009 INFO L87 Difference]: Start difference. First operand 880 states and 1147 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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) [2021-11-07 02:02:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:26,075 INFO L93 Difference]: Finished difference Result 880 states and 1147 transitions. [2021-11-07 02:02:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:26,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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 30 [2021-11-07 02:02:26,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:26,081 INFO L225 Difference]: With dead ends: 880 [2021-11-07 02:02:26,082 INFO L226 Difference]: Without dead ends: 878 [2021-11-07 02:02:26,082 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:26,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2021-11-07 02:02:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 878. [2021-11-07 02:02:26,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 875 states have (on average 1.3085714285714285) internal successors, (1145), 877 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1145 transitions. [2021-11-07 02:02:26,153 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1145 transitions. Word has length 30 [2021-11-07 02:02:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:26,154 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 1145 transitions. [2021-11-07 02:02:26,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 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) [2021-11-07 02:02:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1145 transitions. [2021-11-07 02:02:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-07 02:02:26,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:26,161 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, 1, 1, 1] [2021-11-07 02:02:26,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:26,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:26,376 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:26,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:26,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1145036399, now seen corresponding path program 1 times [2021-11-07 02:02:26,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:26,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [253558197] [2021-11-07 02:02:26,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:26,377 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:26,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:26,378 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:26,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:02:26,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:26,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:27,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:27,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:27,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [253558197] [2021-11-07 02:02:27,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [253558197] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:27,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:27,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:02:27,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470051483] [2021-11-07 02:02:27,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:27,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:27,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:27,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:27,205 INFO L87 Difference]: Start difference. First operand 878 states and 1145 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:27,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:27,269 INFO L93 Difference]: Finished difference Result 878 states and 1145 transitions. [2021-11-07 02:02:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-07 02:02:27,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:27,275 INFO L225 Difference]: With dead ends: 878 [2021-11-07 02:02:27,276 INFO L226 Difference]: Without dead ends: 876 [2021-11-07 02:02:27,276 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2021-11-07 02:02:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 876. [2021-11-07 02:02:27,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 874 states have (on average 1.3077803203661327) internal successors, (1143), 875 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 1143 transitions. [2021-11-07 02:02:27,355 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 1143 transitions. Word has length 31 [2021-11-07 02:02:27,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:27,356 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 1143 transitions. [2021-11-07 02:02:27,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 1143 transitions. [2021-11-07 02:02:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 02:02:27,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:27,357 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, 1, 1, 1, 1] [2021-11-07 02:02:27,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:27,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:27,573 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:27,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:27,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1136383420, now seen corresponding path program 1 times [2021-11-07 02:02:27,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:27,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1459728154] [2021-11-07 02:02:27,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:27,574 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:27,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:27,575 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:27,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:02:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:28,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:28,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:28,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:28,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:28,307 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:28,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1459728154] [2021-11-07 02:02:28,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1459728154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:28,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:28,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:02:28,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019108310] [2021-11-07 02:02:28,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:28,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:28,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:28,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:28,309 INFO L87 Difference]: Start difference. First operand 876 states and 1143 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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) [2021-11-07 02:02:28,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:28,381 INFO L93 Difference]: Finished difference Result 876 states and 1143 transitions. [2021-11-07 02:02:28,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:28,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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 32 [2021-11-07 02:02:28,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:28,387 INFO L225 Difference]: With dead ends: 876 [2021-11-07 02:02:28,387 INFO L226 Difference]: Without dead ends: 868 [2021-11-07 02:02:28,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:28,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-11-07 02:02:28,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2021-11-07 02:02:28,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 1.3068050749711648) internal successors, (1133), 867 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:28,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1133 transitions. [2021-11-07 02:02:28,465 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1133 transitions. Word has length 32 [2021-11-07 02:02:28,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:28,465 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1133 transitions. [2021-11-07 02:02:28,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 2 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) [2021-11-07 02:02:28,466 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1133 transitions. [2021-11-07 02:02:28,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:02:28,472 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:28,472 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:28,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:28,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:28,695 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:28,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1227674702, now seen corresponding path program 1 times [2021-11-07 02:02:28,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:28,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513481375] [2021-11-07 02:02:28,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:28,697 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:28,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:28,698 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:28,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:02:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:29,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:02:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:29,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:29,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:02:29,790 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:29,790 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513481375] [2021-11-07 02:02:29,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513481375] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:29,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:29,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:02:29,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321055571] [2021-11-07 02:02:29,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:02:29,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:29,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:02:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:29,792 INFO L87 Difference]: Start difference. First operand 868 states and 1133 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:29,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:29,939 INFO L93 Difference]: Finished difference Result 1813 states and 2381 transitions. [2021-11-07 02:02:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:02:29,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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 84 [2021-11-07 02:02:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:29,946 INFO L225 Difference]: With dead ends: 1813 [2021-11-07 02:02:29,946 INFO L226 Difference]: Without dead ends: 952 [2021-11-07 02:02:29,947 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:02:29,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2021-11-07 02:02:30,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 931. [2021-11-07 02:02:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 1.3150537634408601) internal successors, (1223), 930 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:30,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 1223 transitions. [2021-11-07 02:02:30,023 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 1223 transitions. Word has length 84 [2021-11-07 02:02:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:30,024 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 1223 transitions. [2021-11-07 02:02:30,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:30,024 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 1223 transitions. [2021-11-07 02:02:30,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:02:30,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:30,027 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:30,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:30,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:30,240 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:30,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash -443790983, now seen corresponding path program 1 times [2021-11-07 02:02:30,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:30,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1711820282] [2021-11-07 02:02:30,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:30,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:30,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:30,244 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:30,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:02:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:02:30,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:31,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:31,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:31,505 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:31,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1711820282] [2021-11-07 02:02:31,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1711820282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:31,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:31,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:02:31,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109725020] [2021-11-07 02:02:31,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:31,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:31,508 INFO L87 Difference]: Start difference. First operand 931 states and 1223 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:31,910 INFO L93 Difference]: Finished difference Result 2611 states and 3415 transitions. [2021-11-07 02:02:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:02:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:02:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:31,921 INFO L225 Difference]: With dead ends: 2611 [2021-11-07 02:02:31,921 INFO L226 Difference]: Without dead ends: 1687 [2021-11-07 02:02:31,923 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:02:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2021-11-07 02:02:32,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 943. [2021-11-07 02:02:32,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.3110403397027601) internal successors, (1235), 942 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1235 transitions. [2021-11-07 02:02:32,024 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1235 transitions. Word has length 92 [2021-11-07 02:02:32,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:32,024 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1235 transitions. [2021-11-07 02:02:32,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:32,024 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1235 transitions. [2021-11-07 02:02:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 02:02:32,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:32,027 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:32,048 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:32,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:32,240 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:32,241 INFO L85 PathProgramCache]: Analyzing trace with hash 712874077, now seen corresponding path program 1 times [2021-11-07 02:02:32,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:32,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965468055] [2021-11-07 02:02:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:32,242 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:32,243 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:32,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:02:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:32,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:02:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:33,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:33,437 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:33,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965468055] [2021-11-07 02:02:33,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965468055] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:33,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:33,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:02:33,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255204001] [2021-11-07 02:02:33,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:02:33,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:33,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:02:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:02:33,439 INFO L87 Difference]: Start difference. First operand 943 states and 1235 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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) [2021-11-07 02:02:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:33,682 INFO L93 Difference]: Finished difference Result 2827 states and 3762 transitions. [2021-11-07 02:02:33,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:02:33,683 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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 94 [2021-11-07 02:02:33,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:33,694 INFO L225 Difference]: With dead ends: 2827 [2021-11-07 02:02:33,695 INFO L226 Difference]: Without dead ends: 1891 [2021-11-07 02:02:33,697 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:02:33,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1891 states. [2021-11-07 02:02:33,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 961. [2021-11-07 02:02:33,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 1.3052083333333333) internal successors, (1253), 960 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1253 transitions. [2021-11-07 02:02:33,819 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1253 transitions. Word has length 94 [2021-11-07 02:02:33,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:33,820 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1253 transitions. [2021-11-07 02:02:33,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 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) [2021-11-07 02:02:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1253 transitions. [2021-11-07 02:02:33,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 02:02:33,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:33,822 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:33,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:34,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:34,037 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:34,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:34,037 INFO L85 PathProgramCache]: Analyzing trace with hash 176000900, now seen corresponding path program 1 times [2021-11-07 02:02:34,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:34,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2096798618] [2021-11-07 02:02:34,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:34,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:34,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:34,038 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:34,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:02:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:34,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:02:34,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:35,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:35,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:35,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2096798618] [2021-11-07 02:02:35,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2096798618] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:35,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:35,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 6 [2021-11-07 02:02:35,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065160864] [2021-11-07 02:02:35,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:02:35,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:35,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:02:35,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:02:35,372 INFO L87 Difference]: Start difference. First operand 961 states and 1253 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) [2021-11-07 02:02:35,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:35,714 INFO L93 Difference]: Finished difference Result 3016 states and 3941 transitions. [2021-11-07 02:02:35,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:02:35,715 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 96 [2021-11-07 02:02:35,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:35,727 INFO L225 Difference]: With dead ends: 3016 [2021-11-07 02:02:35,727 INFO L226 Difference]: Without dead ends: 2062 [2021-11-07 02:02:35,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2021-11-07 02:02:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 961. [2021-11-07 02:02:35,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 960 states have (on average 1.2989583333333334) internal successors, (1247), 960 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:35,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1247 transitions. [2021-11-07 02:02:35,863 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1247 transitions. Word has length 96 [2021-11-07 02:02:35,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:35,864 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1247 transitions. [2021-11-07 02:02:35,864 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) [2021-11-07 02:02:35,864 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1247 transitions. [2021-11-07 02:02:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 02:02:35,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:35,867 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:35,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:36,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:36,088 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:36,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:36,089 INFO L85 PathProgramCache]: Analyzing trace with hash -631253241, now seen corresponding path program 1 times [2021-11-07 02:02:36,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:36,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [619664298] [2021-11-07 02:02:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:36,090 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:36,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:36,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:02:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:36,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:02:36,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:37,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:37,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:37,777 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:37,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:37,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [619664298] [2021-11-07 02:02:37,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [619664298] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:37,778 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:37,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2021-11-07 02:02:37,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042151730] [2021-11-07 02:02:37,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 02:02:37,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:37,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 02:02:37,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-07 02:02:37,780 INFO L87 Difference]: Start difference. First operand 961 states and 1247 transitions. Second operand has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:46,691 INFO L93 Difference]: Finished difference Result 4759 states and 6233 transitions. [2021-11-07 02:02:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:02:46,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-11-07 02:02:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:46,713 INFO L225 Difference]: With dead ends: 4759 [2021-11-07 02:02:46,713 INFO L226 Difference]: Without dead ends: 3805 [2021-11-07 02:02:46,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-11-07 02:02:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3805 states. [2021-11-07 02:02:46,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3805 to 1039. [2021-11-07 02:02:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 1.2822736030828517) internal successors, (1331), 1038 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1331 transitions. [2021-11-07 02:02:46,924 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1331 transitions. Word has length 96 [2021-11-07 02:02:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:46,925 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1331 transitions. [2021-11-07 02:02:46,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.916666666666666) internal successors, (107), 12 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:46,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1331 transitions. [2021-11-07 02:02:46,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 02:02:46,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:46,927 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:46,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:47,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:47,145 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:47,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:47,145 INFO L85 PathProgramCache]: Analyzing trace with hash 74471171, now seen corresponding path program 1 times [2021-11-07 02:02:47,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:47,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1365506870] [2021-11-07 02:02:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:47,146 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:47,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:47,147 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:47,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:02:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:47,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 02:02:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:48,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:48,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:49,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:49,008 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:49,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1365506870] [2021-11-07 02:02:49,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1365506870] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:49,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:49,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-07 02:02:49,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778557853] [2021-11-07 02:02:49,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:02:49,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:49,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:02:49,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:02:49,010 INFO L87 Difference]: Start difference. First operand 1039 states and 1331 transitions. Second operand has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:55,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:55,702 INFO L93 Difference]: Finished difference Result 3619 states and 4683 transitions. [2021-11-07 02:02:55,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 02:02:55,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 98 [2021-11-07 02:02:55,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:55,714 INFO L225 Difference]: With dead ends: 3619 [2021-11-07 02:02:55,714 INFO L226 Difference]: Without dead ends: 2587 [2021-11-07 02:02:55,716 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-11-07 02:02:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2587 states. [2021-11-07 02:02:55,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2587 to 1039. [2021-11-07 02:02:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 1.2822736030828517) internal successors, (1331), 1038 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:55,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1331 transitions. [2021-11-07 02:02:55,910 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1331 transitions. Word has length 98 [2021-11-07 02:02:55,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:55,911 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 1331 transitions. [2021-11-07 02:02:55,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.428571428571429) internal successors, (104), 14 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:55,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1331 transitions. [2021-11-07 02:02:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 02:02:55,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:55,916 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:55,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:56,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:56,133 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:56,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:56,133 INFO L85 PathProgramCache]: Analyzing trace with hash -947202361, now seen corresponding path program 1 times [2021-11-07 02:02:56,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:56,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470316656] [2021-11-07 02:02:56,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:56,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:56,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:56,136 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:56,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:02:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:02:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 02:02:57,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:02:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:57,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:02:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:02:57,713 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:02:57,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470316656] [2021-11-07 02:02:57,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470316656] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:02:57,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:02:57,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 9 [2021-11-07 02:02:57,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018022760] [2021-11-07 02:02:57,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 02:02:57,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:02:57,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 02:02:57,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:02:57,714 INFO L87 Difference]: Start difference. First operand 1039 states and 1331 transitions. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:58,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:02:58,760 INFO L93 Difference]: Finished difference Result 3745 states and 4821 transitions. [2021-11-07 02:02:58,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:02:58,762 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 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 100 [2021-11-07 02:02:58,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:02:58,778 INFO L225 Difference]: With dead ends: 3745 [2021-11-07 02:02:58,779 INFO L226 Difference]: Without dead ends: 2713 [2021-11-07 02:02:58,781 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:02:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2021-11-07 02:02:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1057. [2021-11-07 02:02:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 1.277462121212121) internal successors, (1349), 1056 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:58,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1349 transitions. [2021-11-07 02:02:58,970 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1349 transitions. Word has length 100 [2021-11-07 02:02:58,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:02:58,971 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1349 transitions. [2021-11-07 02:02:58,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:02:58,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1349 transitions. [2021-11-07 02:02:58,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 02:02:58,974 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:02:58,974 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:02:59,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:02:59,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:02:59,197 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:02:59,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:02:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash 759696483, now seen corresponding path program 1 times [2021-11-07 02:02:59,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:02:59,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2077661862] [2021-11-07 02:02:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:02:59,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:02:59,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:02:59,200 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:02:59,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:03:00,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:00,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 714 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 02:03:00,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:00,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:00,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:00,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2077661862] [2021-11-07 02:03:00,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2077661862] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:00,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:00,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 02:03:00,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803319727] [2021-11-07 02:03:00,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 02:03:00,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:00,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 02:03:00,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:03:00,743 INFO L87 Difference]: Start difference. First operand 1057 states and 1349 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:01,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:01,945 INFO L93 Difference]: Finished difference Result 4804 states and 6154 transitions. [2021-11-07 02:03:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:03:01,960 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 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 102 [2021-11-07 02:03:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:01,980 INFO L225 Difference]: With dead ends: 4804 [2021-11-07 02:03:01,981 INFO L226 Difference]: Without dead ends: 4270 [2021-11-07 02:03:01,982 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:03:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4270 states. [2021-11-07 02:03:02,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4270 to 1075. [2021-11-07 02:03:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 1.2728119180633146) internal successors, (1367), 1074 states have internal predecessors, (1367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:02,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 1367 transitions. [2021-11-07 02:03:02,272 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 1367 transitions. Word has length 102 [2021-11-07 02:03:02,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:02,273 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 1367 transitions. [2021-11-07 02:03:02,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:02,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 1367 transitions. [2021-11-07 02:03:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 02:03:02,276 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:02,276 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:02,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:02,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:02,508 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:02,508 INFO L85 PathProgramCache]: Analyzing trace with hash 694050719, now seen corresponding path program 1 times [2021-11-07 02:03:02,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:02,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [733339724] [2021-11-07 02:03:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:02,509 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:02,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:02,510 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:02,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:03:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:03,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 02:03:03,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:03,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:04,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:04,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [733339724] [2021-11-07 02:03:04,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [733339724] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:04,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:04,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 14 [2021-11-07 02:03:04,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636828833] [2021-11-07 02:03:04,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 02:03:04,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:04,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 02:03:04,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-07 02:03:04,637 INFO L87 Difference]: Start difference. First operand 1075 states and 1367 transitions. Second operand has 14 states, 14 states have (on average 8.0) internal successors, (112), 14 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:06,484 INFO L93 Difference]: Finished difference Result 3997 states and 5109 transitions. [2021-11-07 02:03:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 02:03:06,485 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.0) internal successors, (112), 14 states have internal predecessors, (112), 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 104 [2021-11-07 02:03:06,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:06,506 INFO L225 Difference]: With dead ends: 3997 [2021-11-07 02:03:06,507 INFO L226 Difference]: Without dead ends: 2929 [2021-11-07 02:03:06,509 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2021-11-07 02:03:06,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2021-11-07 02:03:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 1093. [2021-11-07 02:03:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1093 states, 1092 states have (on average 1.2683150183150182) internal successors, (1385), 1092 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1093 states to 1093 states and 1385 transitions. [2021-11-07 02:03:06,746 INFO L78 Accepts]: Start accepts. Automaton has 1093 states and 1385 transitions. Word has length 104 [2021-11-07 02:03:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:06,746 INFO L470 AbstractCegarLoop]: Abstraction has 1093 states and 1385 transitions. [2021-11-07 02:03:06,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.0) internal successors, (112), 14 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1093 states and 1385 transitions. [2021-11-07 02:03:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 02:03:06,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:06,748 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:06,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:06,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:06,949 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:06,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1849939628, now seen corresponding path program 1 times [2021-11-07 02:03:06,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:06,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [271511632] [2021-11-07 02:03:06,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:06,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:06,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:06,952 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:06,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:03:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:08,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:08,806 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:08,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:09,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:09,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:09,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [271511632] [2021-11-07 02:03:09,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [271511632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:09,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:09,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:09,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480755998] [2021-11-07 02:03:09,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:09,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:09,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:09,179 INFO L87 Difference]: Start difference. First operand 1093 states and 1385 transitions. Second operand has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:09,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:09,718 INFO L93 Difference]: Finished difference Result 3895 states and 4992 transitions. [2021-11-07 02:03:09,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:09,718 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 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 125 [2021-11-07 02:03:09,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:09,725 INFO L225 Difference]: With dead ends: 3895 [2021-11-07 02:03:09,725 INFO L226 Difference]: Without dead ends: 2809 [2021-11-07 02:03:09,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:03:09,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2809 states. [2021-11-07 02:03:10,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2809 to 1489. [2021-11-07 02:03:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.2614247311827957) internal successors, (1877), 1488 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:10,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1877 transitions. [2021-11-07 02:03:10,034 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1877 transitions. Word has length 125 [2021-11-07 02:03:10,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:10,035 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 1877 transitions. [2021-11-07 02:03:10,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.666666666666668) internal successors, (172), 6 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:10,035 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1877 transitions. [2021-11-07 02:03:10,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 02:03:10,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:10,038 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:10,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:10,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:10,243 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:10,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1983953134, now seen corresponding path program 1 times [2021-11-07 02:03:10,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:10,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999154594] [2021-11-07 02:03:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:10,245 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:10,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:10,246 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:10,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:03:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:11,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:03:11,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:12,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:12,356 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:12,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999154594] [2021-11-07 02:03:12,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999154594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:12,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:12,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:12,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101453251] [2021-11-07 02:03:12,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:12,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:12,359 INFO L87 Difference]: Start difference. First operand 1489 states and 1877 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:12,913 INFO L93 Difference]: Finished difference Result 3685 states and 4672 transitions. [2021-11-07 02:03:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:12,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 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 125 [2021-11-07 02:03:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:12,918 INFO L225 Difference]: With dead ends: 3685 [2021-11-07 02:03:12,918 INFO L226 Difference]: Without dead ends: 2191 [2021-11-07 02:03:12,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:03:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2191 states. [2021-11-07 02:03:13,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2191 to 1489. [2021-11-07 02:03:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 1.2573924731182795) internal successors, (1871), 1488 states have internal predecessors, (1871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:13,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 1871 transitions. [2021-11-07 02:03:13,189 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 1871 transitions. Word has length 125 [2021-11-07 02:03:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:13,189 INFO L470 AbstractCegarLoop]: Abstraction has 1489 states and 1871 transitions. [2021-11-07 02:03:13,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:13,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 1871 transitions. [2021-11-07 02:03:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 02:03:13,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:13,192 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:13,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:13,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:13,393 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:13,394 INFO L85 PathProgramCache]: Analyzing trace with hash 860370798, now seen corresponding path program 1 times [2021-11-07 02:03:13,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:13,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [942945996] [2021-11-07 02:03:13,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:13,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:13,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:13,396 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:13,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 02:03:14,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:14,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:14,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:15,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:16,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:16,024 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:16,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [942945996] [2021-11-07 02:03:16,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [942945996] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:03:16,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1652466684] [2021-11-07 02:03:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:16,025 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:03:16,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:03:16,044 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:03:16,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 02:03:17,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:17,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:17,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:17,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:17,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:18,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1652466684] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:03:18,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677314370] [2021-11-07 02:03:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:18,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:03:18,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:03:18,469 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:03:18,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 02:03:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:19,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:19,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:20,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:20,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677314370] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:03:20,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:03:20,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-11-07 02:03:20,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846155301] [2021-11-07 02:03:20,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:20,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:20,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:20,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:20,903 INFO L87 Difference]: Start difference. First operand 1489 states and 1871 transitions. Second operand has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 6 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:23,601 INFO L93 Difference]: Finished difference Result 8894 states and 11185 transitions. [2021-11-07 02:03:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:03:23,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 6 states have internal predecessors, (242), 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 127 [2021-11-07 02:03:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:23,620 INFO L225 Difference]: With dead ends: 8894 [2021-11-07 02:03:23,620 INFO L226 Difference]: Without dead ends: 8889 [2021-11-07 02:03:23,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 752 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:03:23,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8889 states. [2021-11-07 02:03:25,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8889 to 8715. [2021-11-07 02:03:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8715 states, 8714 states have (on average 1.2588937342207942) internal successors, (10970), 8714 states have internal predecessors, (10970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:25,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8715 states to 8715 states and 10970 transitions. [2021-11-07 02:03:25,275 INFO L78 Accepts]: Start accepts. Automaton has 8715 states and 10970 transitions. Word has length 127 [2021-11-07 02:03:25,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:25,276 INFO L470 AbstractCegarLoop]: Abstraction has 8715 states and 10970 transitions. [2021-11-07 02:03:25,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.333333333333336) internal successors, (242), 6 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:25,276 INFO L276 IsEmpty]: Start isEmpty. Operand 8715 states and 10970 transitions. [2021-11-07 02:03:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-07 02:03:25,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:25,287 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:25,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:25,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2021-11-07 02:03:25,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:25,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:03:25,901 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1561435376, now seen corresponding path program 1 times [2021-11-07 02:03:25,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:25,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1037733395] [2021-11-07 02:03:25,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:25,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:25,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:25,904 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:25,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 02:03:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:27,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 869 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:03:27,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:27,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:27,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-07 02:03:28,065 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:28,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1037733395] [2021-11-07 02:03:28,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1037733395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:28,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:28,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:03:28,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493017888] [2021-11-07 02:03:28,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:28,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:28,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:28,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:28,067 INFO L87 Difference]: Start difference. First operand 8715 states and 10970 transitions. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:31,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:31,656 INFO L93 Difference]: Finished difference Result 27675 states and 35021 transitions. [2021-11-07 02:03:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:31,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 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 127 [2021-11-07 02:03:31,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:31,709 INFO L225 Difference]: With dead ends: 27675 [2021-11-07 02:03:31,709 INFO L226 Difference]: Without dead ends: 18967 [2021-11-07 02:03:31,725 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:03:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18967 states. [2021-11-07 02:03:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18967 to 8751. [2021-11-07 02:03:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 8750 states have (on average 1.2578285714285715) internal successors, (11006), 8750 states have internal predecessors, (11006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 11006 transitions. [2021-11-07 02:03:33,985 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 11006 transitions. Word has length 127 [2021-11-07 02:03:33,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:33,986 INFO L470 AbstractCegarLoop]: Abstraction has 8751 states and 11006 transitions. [2021-11-07 02:03:33,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 11006 transitions. [2021-11-07 02:03:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-07 02:03:34,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:34,001 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:34,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:34,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:34,216 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2021-11-07 02:03:34,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:34,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1891052744, now seen corresponding path program 1 times [2021-11-07 02:03:34,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:34,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1841193109] [2021-11-07 02:03:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:34,218 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:34,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:34,219 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:34,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8e10cb05-4c11-4e1a-a2fc-0f3cb3f72b09/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 02:03:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:38,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 02:03:38,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:38,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-07 02:03:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 02:03:39,226 INFO L354 Elim1Store]: treesize reduction 16, result has 23.8 percent of original size [2021-11-07 02:03:39,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2021-11-07 02:03:39,276 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 02:03:39,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 47 [2021-11-07 02:03:40,499 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-07 02:03:40,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 81 [2021-11-07 02:03:45,062 INFO L354 Elim1Store]: treesize reduction 69, result has 34.9 percent of original size [2021-11-07 02:03:45,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 97 treesize of output 124 [2021-11-07 02:03:49,178 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-11-07 02:03:49,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 131 treesize of output 137 [2021-11-07 02:04:20,084 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-07 02:04:20,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-07 02:04:20,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-07 02:04:20,869 INFO L354 Elim1Store]: treesize reduction 42, result has 10.6 percent of original size [2021-11-07 02:04:20,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 47 [2021-11-07 02:04:20,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2021-11-07 02:04:20,945 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:04:20,946 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-11-07 02:04:21,010 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-07 02:04:21,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 57 treesize of output 60 [2021-11-07 02:04:21,049 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-07 02:04:21,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 42 [2021-11-07 02:04:25,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:04:25,590 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3779 [2021-11-07 02:04:25,596 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 02:04:25,597 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4139