./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec8_product22.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/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_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/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 32bit --witnessprinter.graph.data.programhash b01b58381ce8e0150d6e0f0de264371fec0586e2ead4f1a313de13afba1fd67c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:05:11,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:05:11,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:05:11,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:05:11,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:05:11,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:05:11,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:05:11,232 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:05:11,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:05:11,235 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:05:11,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:05:11,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:05:11,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:05:11,240 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:05:11,242 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:05:11,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:05:11,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:05:11,246 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:05:11,248 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:05:11,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:05:11,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:05:11,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:05:11,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:05:11,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:05:11,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:05:11,262 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:05:11,262 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:05:11,264 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:05:11,264 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:05:11,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:05:11,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:05:11,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:05:11,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:05:11,269 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:05:11,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:05:11,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:05:11,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:05:11,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:05:11,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:05:11,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:05:11,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:05:11,277 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:05:11,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:05:11,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:05:11,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:05:11,308 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:05:11,308 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:05:11,308 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:05:11,309 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:05:11,309 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:05:11,309 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:05:11,309 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:05:11,310 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:05:11,310 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:05:11,310 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:05:11,311 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:05:11,311 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:05:11,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:05:11,312 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:05:11,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:05:11,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:05:11,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:05:11,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:05:11,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:05:11,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:05:11,314 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:05:11,314 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:05:11,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:05:11,314 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:05:11,315 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:05:11,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:05:11,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:05:11,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:11,316 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:05:11,316 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:05:11,317 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:05:11,317 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:05:11,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:05:11,317 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:05:11,318 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:05:11,318 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:05:11,318 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_e3397391-f6cf-4a29-bfa4-96d01131893e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b01b58381ce8e0150d6e0f0de264371fec0586e2ead4f1a313de13afba1fd67c [2021-11-07 02:05:11,602 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:05:11,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:05:11,649 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:05:11,650 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:05:11,651 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:05:11,652 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product22.cil.c [2021-11-07 02:05:11,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data/d7cba1d10/34444aaca6c44e48a48369348ab707dc/FLAG2d7c60a1e [2021-11-07 02:05:12,498 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:05:12,499 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/sv-benchmarks/c/product-lines/email_spec8_product22.cil.c [2021-11-07 02:05:12,530 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data/d7cba1d10/34444aaca6c44e48a48369348ab707dc/FLAG2d7c60a1e [2021-11-07 02:05:12,664 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data/d7cba1d10/34444aaca6c44e48a48369348ab707dc [2021-11-07 02:05:12,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:05:12,677 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:05:12,679 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:12,680 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:05:12,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:05:12,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:12" (1/1) ... [2021-11-07 02:05:12,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2137f941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:12, skipping insertion in model container [2021-11-07 02:05:12,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:12" (1/1) ... [2021-11-07 02:05:12,695 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:05:12,788 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:13,297 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_e3397391-f6cf-4a29-bfa4-96d01131893e/sv-benchmarks/c/product-lines/email_spec8_product22.cil.c[29813,29826] [2021-11-07 02:05:13,417 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:13,431 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 02:05:13,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@16c868b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:13, skipping insertion in model container [2021-11-07 02:05:13,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:13,432 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:05:13,434 INFO L168 Benchmark]: Toolchain (without parser) took 762.60 ms. Allocated memory is still 107.0 MB. Free memory was 72.3 MB in the beginning and 46.4 MB in the end (delta: 26.0 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 02:05:13,435 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory is still 48.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:05:13,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 752.72 ms. Allocated memory is still 107.0 MB. Free memory was 72.0 MB in the beginning and 46.5 MB in the end (delta: 25.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 02:05:13,438 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory is still 48.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 752.72 ms. Allocated memory is still 107.0 MB. Free memory was 72.0 MB in the beginning and 46.5 MB in the end (delta: 25.4 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1035]: 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_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/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_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec8_product22.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/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 32bit --witnessprinter.graph.data.programhash b01b58381ce8e0150d6e0f0de264371fec0586e2ead4f1a313de13afba1fd67c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:05:15,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:05:15,851 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:05:15,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:05:15,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:05:15,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:05:15,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:05:15,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:05:15,897 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:05:15,898 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:05:15,900 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:05:15,901 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:05:15,902 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:05:15,903 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:05:15,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:05:15,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:05:15,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:05:15,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:05:15,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:05:15,925 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:05:15,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:05:15,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:05:15,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:05:15,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:05:15,937 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:05:15,938 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:05:15,938 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:05:15,939 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:05:15,940 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:05:15,942 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:05:15,942 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:05:15,944 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:05:15,945 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:05:15,946 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:05:15,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:05:15,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:05:15,950 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:05:15,950 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:05:15,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:05:15,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:05:15,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:05:15,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:05:15,983 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:05:15,984 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:05:15,985 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:05:15,985 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:05:15,986 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:05:15,986 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:05:15,987 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:05:15,987 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:05:15,987 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:05:15,988 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:05:15,989 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:05:15,989 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:05:15,989 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:05:15,990 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:05:15,990 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:05:15,990 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:05:15,991 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:05:15,991 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:05:15,991 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:05:15,992 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:05:15,992 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:05:15,992 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:05:15,993 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:05:15,993 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:05:15,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:05:15,994 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:05:15,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:15,995 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:05:15,995 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:05:15,995 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:05:15,996 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:05:15,996 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:05:15,996 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:05:15,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:05:15,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:05:15,997 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_e3397391-f6cf-4a29-bfa4-96d01131893e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b01b58381ce8e0150d6e0f0de264371fec0586e2ead4f1a313de13afba1fd67c [2021-11-07 02:05:16,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:05:16,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:05:16,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:05:16,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:05:16,466 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:05:16,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec8_product22.cil.c [2021-11-07 02:05:16,549 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data/26c62529f/9a68ba826a8c48a9ba4349f113336ca1/FLAG7840fc096 [2021-11-07 02:05:17,321 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:05:17,322 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/sv-benchmarks/c/product-lines/email_spec8_product22.cil.c [2021-11-07 02:05:17,373 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data/26c62529f/9a68ba826a8c48a9ba4349f113336ca1/FLAG7840fc096 [2021-11-07 02:05:17,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/data/26c62529f/9a68ba826a8c48a9ba4349f113336ca1 [2021-11-07 02:05:17,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:05:17,401 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:05:17,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:17,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:05:17,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:05:17,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:17" (1/1) ... [2021-11-07 02:05:17,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3defee92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:17, skipping insertion in model container [2021-11-07 02:05:17,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:05:17" (1/1) ... [2021-11-07 02:05:17,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:05:17,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:18,072 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_e3397391-f6cf-4a29-bfa4-96d01131893e/sv-benchmarks/c/product-lines/email_spec8_product22.cil.c[29813,29826] [2021-11-07 02:05:18,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:18,296 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:05:18,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:05:18,430 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_e3397391-f6cf-4a29-bfa4-96d01131893e/sv-benchmarks/c/product-lines/email_spec8_product22.cil.c[29813,29826] [2021-11-07 02:05:18,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:18,508 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:05:18,583 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_e3397391-f6cf-4a29-bfa4-96d01131893e/sv-benchmarks/c/product-lines/email_spec8_product22.cil.c[29813,29826] [2021-11-07 02:05:18,614 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:05:18,677 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:05:18,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18 WrapperNode [2021-11-07 02:05:18,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:05:18,679 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:05:18,679 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:05:18,679 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:05:18,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,739 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:05:18,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:05:18,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:05:18,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:05:18,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,940 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:18,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:05:18,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:05:18,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:05:18,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:05:18,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (1/1) ... [2021-11-07 02:05:19,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:05:19,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:05:19,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:05:19,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:05:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:05:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:05:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:05:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:05:19,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:05:23,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:05:23,693 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 02:05:23,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:23 BoogieIcfgContainer [2021-11-07 02:05:23,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:05:23,701 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:05:23,701 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:05:23,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:05:23,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:05:17" (1/3) ... [2021-11-07 02:05:23,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73563b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:23, skipping insertion in model container [2021-11-07 02:05:23,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:05:18" (2/3) ... [2021-11-07 02:05:23,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73563b18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:05:23, skipping insertion in model container [2021-11-07 02:05:23,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:05:23" (3/3) ... [2021-11-07 02:05:23,708 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec8_product22.cil.c [2021-11-07 02:05:23,714 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:05:23,714 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 02:05:23,787 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:05:23,797 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 02:05:23,797 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 02:05:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand has 479 states, 476 states have (on average 1.7415966386554622) internal successors, (829), 478 states have internal predecessors, (829), 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 02:05:23,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:05:23,849 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:23,849 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:23,850 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:23,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:23,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1963774830, now seen corresponding path program 1 times [2021-11-07 02:05:23,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:23,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [244732593] [2021-11-07 02:05:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:23,873 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:23,876 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:23,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:05:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:24,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:05:24,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:24,534 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 02:05:24,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:24,643 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 02:05:24,644 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:24,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [244732593] [2021-11-07 02:05:24,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [244732593] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:24,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:24,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:05:24,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377101248] [2021-11-07 02:05:24,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:05:24,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:24,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:05:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:05:24,678 INFO L87 Difference]: Start difference. First operand has 479 states, 476 states have (on average 1.7415966386554622) internal successors, (829), 478 states have internal predecessors, (829), 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 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 02:05:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:24,768 INFO L93 Difference]: Finished difference Result 712 states and 1210 transitions. [2021-11-07 02:05:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:05:24,770 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 41 [2021-11-07 02:05:24,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:24,795 INFO L225 Difference]: With dead ends: 712 [2021-11-07 02:05:24,796 INFO L226 Difference]: Without dead ends: 401 [2021-11-07 02:05:24,804 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 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 02:05:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-07 02:05:24,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 401. [2021-11-07 02:05:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 399 states have (on average 1.7468671679197996) internal successors, (697), 400 states have internal predecessors, (697), 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 02:05:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 697 transitions. [2021-11-07 02:05:24,891 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 697 transitions. Word has length 41 [2021-11-07 02:05:24,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:24,891 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 697 transitions. [2021-11-07 02:05:24,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 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 02:05:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 697 transitions. [2021-11-07 02:05:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:05:24,896 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:24,896 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:24,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:25,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:25,112 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:25,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1855386875, now seen corresponding path program 1 times [2021-11-07 02:05:25,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:25,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622154216] [2021-11-07 02:05:25,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:25,115 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:25,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:25,116 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:25,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:05:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:05:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:25,671 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 02:05:25,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:25,805 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 02:05:25,806 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:25,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622154216] [2021-11-07 02:05:25,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622154216] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:25,807 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:25,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:25,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500697566] [2021-11-07 02:05:25,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:25,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:25,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:25,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:25,814 INFO L87 Difference]: Start difference. First operand 401 states and 697 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 02:05:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:25,928 INFO L93 Difference]: Finished difference Result 1173 states and 2043 transitions. [2021-11-07 02:05:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:25,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 42 [2021-11-07 02:05:25,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:25,934 INFO L225 Difference]: With dead ends: 1173 [2021-11-07 02:05:25,935 INFO L226 Difference]: Without dead ends: 787 [2021-11-07 02:05:25,938 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 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 02:05:25,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2021-11-07 02:05:25,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 400. [2021-11-07 02:05:25,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.7386934673366834) internal successors, (692), 399 states have internal predecessors, (692), 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 02:05:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 692 transitions. [2021-11-07 02:05:25,995 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 692 transitions. Word has length 42 [2021-11-07 02:05:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:25,996 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 692 transitions. [2021-11-07 02:05:25,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 02:05:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 692 transitions. [2021-11-07 02:05:26,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:05:26,011 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:26,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:26,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:26,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:26,228 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:26,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1651061153, now seen corresponding path program 1 times [2021-11-07 02:05:26,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:26,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400576986] [2021-11-07 02:05:26,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:26,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:26,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:26,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:26,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:05:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:26,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:05:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:26,794 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 02:05:26,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:26,930 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 02:05:26,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:26,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400576986] [2021-11-07 02:05:26,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400576986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:26,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:26,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:26,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152331989] [2021-11-07 02:05:26,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:26,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:26,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:26,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:26,934 INFO L87 Difference]: Start difference. First operand 400 states and 692 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 02:05:27,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:27,175 INFO L93 Difference]: Finished difference Result 1517 states and 2630 transitions. [2021-11-07 02:05:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:05:27,176 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 44 [2021-11-07 02:05:27,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:27,184 INFO L225 Difference]: With dead ends: 1517 [2021-11-07 02:05:27,184 INFO L226 Difference]: Without dead ends: 1135 [2021-11-07 02:05:27,185 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:05:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-11-07 02:05:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 399. [2021-11-07 02:05:27,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 397 states have (on average 1.7329974811083124) internal successors, (688), 398 states have internal predecessors, (688), 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 02:05:27,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 688 transitions. [2021-11-07 02:05:27,223 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 688 transitions. Word has length 44 [2021-11-07 02:05:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:27,224 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 688 transitions. [2021-11-07 02:05:27,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 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 02:05:27,225 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 688 transitions. [2021-11-07 02:05:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:05:27,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:27,226 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:27,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:27,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:27,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:27,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:27,441 INFO L85 PathProgramCache]: Analyzing trace with hash -757093844, now seen corresponding path program 1 times [2021-11-07 02:05:27,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:27,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1331990806] [2021-11-07 02:05:27,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:27,443 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:27,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:27,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:27,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:05:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:05:27,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:28,013 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 02:05:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:28,142 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 02:05:28,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:28,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1331990806] [2021-11-07 02:05:28,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1331990806] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:28,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:28,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:28,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527879826] [2021-11-07 02:05:28,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:28,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:28,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:28,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:28,145 INFO L87 Difference]: Start difference. First operand 399 states and 688 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 02:05:28,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:28,211 INFO L93 Difference]: Finished difference Result 795 states and 1373 transitions. [2021-11-07 02:05:28,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 45 [2021-11-07 02:05:28,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:28,215 INFO L225 Difference]: With dead ends: 795 [2021-11-07 02:05:28,215 INFO L226 Difference]: Without dead ends: 404 [2021-11-07 02:05:28,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 02:05:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-11-07 02:05:28,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 399. [2021-11-07 02:05:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 397 states have (on average 1.7254408060453401) internal successors, (685), 398 states have internal predecessors, (685), 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 02:05:28,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 685 transitions. [2021-11-07 02:05:28,251 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 685 transitions. Word has length 45 [2021-11-07 02:05:28,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:28,251 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 685 transitions. [2021-11-07 02:05:28,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 02:05:28,251 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 685 transitions. [2021-11-07 02:05:28,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:05:28,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:28,253 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:28,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:28,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:28,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:28,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:28,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1603291255, now seen corresponding path program 1 times [2021-11-07 02:05:28,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:28,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [210654183] [2021-11-07 02:05:28,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:28,469 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:28,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:28,470 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:28,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:05:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:28,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:05:28,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:29,014 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 02:05:29,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:29,146 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 02:05:29,147 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:29,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [210654183] [2021-11-07 02:05:29,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [210654183] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:29,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:29,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:29,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282189962] [2021-11-07 02:05:29,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:29,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:29,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:29,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:29,150 INFO L87 Difference]: Start difference. First operand 399 states and 685 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 02:05:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:29,395 INFO L93 Difference]: Finished difference Result 1504 states and 2606 transitions. [2021-11-07 02:05:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:05:29,396 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 46 [2021-11-07 02:05:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:29,403 INFO L225 Difference]: With dead ends: 1504 [2021-11-07 02:05:29,404 INFO L226 Difference]: Without dead ends: 1131 [2021-11-07 02:05:29,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:05:29,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-11-07 02:05:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 399. [2021-11-07 02:05:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 397 states have (on average 1.7178841309823678) internal successors, (682), 398 states have internal predecessors, (682), 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 02:05:29,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 682 transitions. [2021-11-07 02:05:29,444 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 682 transitions. Word has length 46 [2021-11-07 02:05:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:29,446 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 682 transitions. [2021-11-07 02:05:29,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 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 02:05:29,446 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 682 transitions. [2021-11-07 02:05:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:05:29,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:29,449 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:29,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:29,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:29,667 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:29,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:29,667 INFO L85 PathProgramCache]: Analyzing trace with hash -795178020, now seen corresponding path program 1 times [2021-11-07 02:05:29,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:29,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1852404887] [2021-11-07 02:05:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:29,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:29,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:29,669 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:29,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:05:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:30,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:30,265 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 02:05:30,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:30,415 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 02:05:30,415 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:30,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1852404887] [2021-11-07 02:05:30,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1852404887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:30,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:30,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:05:30,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892263551] [2021-11-07 02:05:30,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:05:30,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:30,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:05:30,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:05:30,417 INFO L87 Difference]: Start difference. First operand 399 states and 682 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 02:05:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:30,507 INFO L93 Difference]: Finished difference Result 927 states and 1586 transitions. [2021-11-07 02:05:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:30,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 48 [2021-11-07 02:05:30,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:30,513 INFO L225 Difference]: With dead ends: 927 [2021-11-07 02:05:30,513 INFO L226 Difference]: Without dead ends: 772 [2021-11-07 02:05:30,514 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 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 02:05:30,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2021-11-07 02:05:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 617. [2021-11-07 02:05:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 615 states have (on average 1.7560975609756098) internal successors, (1080), 616 states have internal predecessors, (1080), 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 02:05:30,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1080 transitions. [2021-11-07 02:05:30,574 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1080 transitions. Word has length 48 [2021-11-07 02:05:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:30,574 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1080 transitions. [2021-11-07 02:05:30,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 02:05:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1080 transitions. [2021-11-07 02:05:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:05:30,576 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:30,577 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, 1, 1, 1, 1, 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 02:05:30,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-07 02:05:30,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:30,800 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1751915381, now seen corresponding path program 1 times [2021-11-07 02:05:30,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:30,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808240396] [2021-11-07 02:05:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:30,801 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:30,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:30,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:30,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:05:31,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:31,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:31,412 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 02:05:31,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:31,576 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 02:05:31,577 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:31,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808240396] [2021-11-07 02:05:31,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808240396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:31,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:31,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:31,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588141044] [2021-11-07 02:05:31,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:31,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:31,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:31,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:31,579 INFO L87 Difference]: Start difference. First operand 617 states and 1080 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 02:05:31,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:31,676 INFO L93 Difference]: Finished difference Result 1471 states and 2581 transitions. [2021-11-07 02:05:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:31,676 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 60 [2021-11-07 02:05:31,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:31,683 INFO L225 Difference]: With dead ends: 1471 [2021-11-07 02:05:31,683 INFO L226 Difference]: Without dead ends: 938 [2021-11-07 02:05:31,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 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 02:05:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2021-11-07 02:05:31,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 783. [2021-11-07 02:05:31,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 781 states have (on average 1.768245838668374) internal successors, (1381), 782 states have internal predecessors, (1381), 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 02:05:31,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 1381 transitions. [2021-11-07 02:05:31,781 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 1381 transitions. Word has length 60 [2021-11-07 02:05:31,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:31,781 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 1381 transitions. [2021-11-07 02:05:31,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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 02:05:31,782 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 1381 transitions. [2021-11-07 02:05:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:05:31,783 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:31,784 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, 1, 1, 1, 1, 1, 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 02:05:31,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:31,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:31,997 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:31,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:31,997 INFO L85 PathProgramCache]: Analyzing trace with hash -931304180, now seen corresponding path program 1 times [2021-11-07 02:05:31,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:31,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55809985] [2021-11-07 02:05:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:31,998 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:31,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:31,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:32,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:05:32,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:32,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:32,627 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 02:05:32,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:32,784 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 02:05:32,784 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:32,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55809985] [2021-11-07 02:05:32,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55809985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:32,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:32,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:32,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222437864] [2021-11-07 02:05:32,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:32,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:32,786 INFO L87 Difference]: Start difference. First operand 783 states and 1381 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 02:05:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:32,923 INFO L93 Difference]: Finished difference Result 2001 states and 3549 transitions. [2021-11-07 02:05:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 61 [2021-11-07 02:05:32,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:32,934 INFO L225 Difference]: With dead ends: 2001 [2021-11-07 02:05:32,934 INFO L226 Difference]: Without dead ends: 1310 [2021-11-07 02:05:32,937 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 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 02:05:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-11-07 02:05:33,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1155. [2021-11-07 02:05:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1153 states have (on average 1.7857762359063314) internal successors, (2059), 1154 states have internal predecessors, (2059), 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 02:05:33,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 2059 transitions. [2021-11-07 02:05:33,036 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 2059 transitions. Word has length 61 [2021-11-07 02:05:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:33,037 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 2059 transitions. [2021-11-07 02:05:33,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 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 02:05:33,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 2059 transitions. [2021-11-07 02:05:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:05:33,039 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:33,039 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, 1, 1, 1, 1, 1, 1, 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 02:05:33,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:33,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:33,255 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:33,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:33,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1008707811, now seen corresponding path program 1 times [2021-11-07 02:05:33,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:33,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1961210279] [2021-11-07 02:05:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:33,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:33,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:33,266 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:33,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:05:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:33,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:33,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:33,940 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 02:05:33,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:34,104 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 02:05:34,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:34,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1961210279] [2021-11-07 02:05:34,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1961210279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:34,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:34,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:34,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240658693] [2021-11-07 02:05:34,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:34,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:34,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:34,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:34,106 INFO L87 Difference]: Start difference. First operand 1155 states and 2059 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 02:05:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:34,275 INFO L93 Difference]: Finished difference Result 3097 states and 5552 transitions. [2021-11-07 02:05:34,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:34,276 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 62 [2021-11-07 02:05:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:34,289 INFO L225 Difference]: With dead ends: 3097 [2021-11-07 02:05:34,289 INFO L226 Difference]: Without dead ends: 2042 [2021-11-07 02:05:34,291 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 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 02:05:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2042 states. [2021-11-07 02:05:34,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2042 to 1887. [2021-11-07 02:05:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1885 states have (on average 1.8005305039787798) internal successors, (3394), 1886 states have internal predecessors, (3394), 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 02:05:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3394 transitions. [2021-11-07 02:05:34,474 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3394 transitions. Word has length 62 [2021-11-07 02:05:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:34,475 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 3394 transitions. [2021-11-07 02:05:34,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 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 02:05:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3394 transitions. [2021-11-07 02:05:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:05:34,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:34,479 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, 1, 1, 1, 1, 1, 1, 1, 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 02:05:34,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:34,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:34,695 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:34,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:34,695 INFO L85 PathProgramCache]: Analyzing trace with hash -181212771, now seen corresponding path program 1 times [2021-11-07 02:05:34,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:34,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2011543627] [2021-11-07 02:05:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:34,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:34,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:34,697 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:34,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:05:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:35,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:35,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:35,345 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 02:05:35,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:35,519 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 02:05:35,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:35,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2011543627] [2021-11-07 02:05:35,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2011543627] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:35,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:35,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:35,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973147825] [2021-11-07 02:05:35,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:35,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:35,522 INFO L87 Difference]: Start difference. First operand 1887 states and 3394 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 02:05:35,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:35,747 INFO L93 Difference]: Finished difference Result 5029 states and 9076 transitions. [2021-11-07 02:05:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:35,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-11-07 02:05:35,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:35,770 INFO L225 Difference]: With dead ends: 5029 [2021-11-07 02:05:35,771 INFO L226 Difference]: Without dead ends: 3276 [2021-11-07 02:05:35,774 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 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 02:05:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-11-07 02:05:36,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 3121. [2021-11-07 02:05:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3121 states, 3119 states have (on average 1.8079512664315485) internal successors, (5639), 3120 states have internal predecessors, (5639), 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 02:05:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3121 states to 3121 states and 5639 transitions. [2021-11-07 02:05:36,072 INFO L78 Accepts]: Start accepts. Automaton has 3121 states and 5639 transitions. Word has length 63 [2021-11-07 02:05:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:36,073 INFO L470 AbstractCegarLoop]: Abstraction has 3121 states and 5639 transitions. [2021-11-07 02:05:36,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 02:05:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3121 states and 5639 transitions. [2021-11-07 02:05:36,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:05:36,077 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:36,077 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:36,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:36,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:36,291 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:36,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:36,291 INFO L85 PathProgramCache]: Analyzing trace with hash -610215284, now seen corresponding path program 1 times [2021-11-07 02:05:36,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:36,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009886333] [2021-11-07 02:05:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:36,293 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:36,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:36,294 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:36,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:05:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:36,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:36,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:37,051 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 02:05:37,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:37,230 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 02:05:37,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:37,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009886333] [2021-11-07 02:05:37,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009886333] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:37,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:37,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:37,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040327951] [2021-11-07 02:05:37,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:37,232 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:37,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:37,232 INFO L87 Difference]: Start difference. First operand 3121 states and 5639 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 02:05:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:37,660 INFO L93 Difference]: Finished difference Result 8447 states and 15294 transitions. [2021-11-07 02:05:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-11-07 02:05:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:37,709 INFO L225 Difference]: With dead ends: 8447 [2021-11-07 02:05:37,709 INFO L226 Difference]: Without dead ends: 5494 [2021-11-07 02:05:37,719 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 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 02:05:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5494 states. [2021-11-07 02:05:38,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5494 to 5339. [2021-11-07 02:05:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5339 states, 5337 states have (on average 1.810755105864718) internal successors, (9664), 5338 states have internal predecessors, (9664), 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 02:05:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5339 states to 5339 states and 9664 transitions. [2021-11-07 02:05:38,164 INFO L78 Accepts]: Start accepts. Automaton has 5339 states and 9664 transitions. Word has length 64 [2021-11-07 02:05:38,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:38,165 INFO L470 AbstractCegarLoop]: Abstraction has 5339 states and 9664 transitions. [2021-11-07 02:05:38,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 02:05:38,166 INFO L276 IsEmpty]: Start isEmpty. Operand 5339 states and 9664 transitions. [2021-11-07 02:05:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:05:38,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:38,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:38,196 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:38,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:38,391 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:38,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash -891700692, now seen corresponding path program 1 times [2021-11-07 02:05:38,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:38,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [906457691] [2021-11-07 02:05:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:38,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:38,393 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:38,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:05:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:38,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:38,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:39,091 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 02:05:39,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:39,260 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 02:05:39,261 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:39,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [906457691] [2021-11-07 02:05:39,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [906457691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:39,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:39,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:39,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471954387] [2021-11-07 02:05:39,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:39,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:39,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:39,263 INFO L87 Difference]: Start difference. First operand 5339 states and 9664 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 02:05:39,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:39,965 INFO L93 Difference]: Finished difference Result 15427 states and 27980 transitions. [2021-11-07 02:05:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 65 [2021-11-07 02:05:39,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:40,036 INFO L225 Difference]: With dead ends: 15427 [2021-11-07 02:05:40,036 INFO L226 Difference]: Without dead ends: 10264 [2021-11-07 02:05:40,045 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 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 02:05:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10264 states. [2021-11-07 02:05:40,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10264 to 10109. [2021-11-07 02:05:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10109 states, 10107 states have (on average 1.8127040664885723) internal successors, (18321), 10108 states have internal predecessors, (18321), 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 02:05:40,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10109 states to 10109 states and 18321 transitions. [2021-11-07 02:05:40,750 INFO L78 Accepts]: Start accepts. Automaton has 10109 states and 18321 transitions. Word has length 65 [2021-11-07 02:05:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:40,750 INFO L470 AbstractCegarLoop]: Abstraction has 10109 states and 18321 transitions. [2021-11-07 02:05:40,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 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 02:05:40,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10109 states and 18321 transitions. [2021-11-07 02:05:40,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:05:40,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:40,756 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:40,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:40,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:40,969 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1985124036, now seen corresponding path program 1 times [2021-11-07 02:05:40,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:40,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172845130] [2021-11-07 02:05:40,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:40,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:40,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:40,972 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:40,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:05:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:41,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:41,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:41,738 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:05:41,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:41,956 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:05:41,956 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:41,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172845130] [2021-11-07 02:05:41,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172845130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:41,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:41,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:41,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874981107] [2021-11-07 02:05:41,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:41,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:41,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:41,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:41,959 INFO L87 Difference]: Start difference. First operand 10109 states and 18321 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 02:05:44,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:44,942 INFO L93 Difference]: Finished difference Result 24886 states and 45116 transitions. [2021-11-07 02:05:44,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:05:44,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 66 [2021-11-07 02:05:44,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:45,036 INFO L225 Difference]: With dead ends: 24886 [2021-11-07 02:05:45,036 INFO L226 Difference]: Without dead ends: 15031 [2021-11-07 02:05:45,052 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 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 02:05:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15031 states. [2021-11-07 02:05:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15031 to 10076. [2021-11-07 02:05:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10074 states have (on average 1.8055390113162597) internal successors, (18189), 10075 states have internal predecessors, (18189), 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 02:05:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 18189 transitions. [2021-11-07 02:05:45,746 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 18189 transitions. Word has length 66 [2021-11-07 02:05:45,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:45,747 INFO L470 AbstractCegarLoop]: Abstraction has 10076 states and 18189 transitions. [2021-11-07 02:05:45,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 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 02:05:45,748 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 18189 transitions. [2021-11-07 02:05:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:05:45,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:45,754 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:45,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 02:05:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:45,969 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:45,970 INFO L85 PathProgramCache]: Analyzing trace with hash 2024507901, now seen corresponding path program 1 times [2021-11-07 02:05:45,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:45,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409495342] [2021-11-07 02:05:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:45,971 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:45,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:45,971 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:45,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:05:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:46,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:46,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:46,873 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 02:05:46,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:47,052 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 02:05:47,053 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:47,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409495342] [2021-11-07 02:05:47,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409495342] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:47,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:47,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:47,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324810396] [2021-11-07 02:05:47,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:47,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:47,056 INFO L87 Difference]: Start difference. First operand 10076 states and 18189 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:48,182 INFO L93 Difference]: Finished difference Result 29470 states and 53262 transitions. [2021-11-07 02:05:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:48,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:05:48,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:48,234 INFO L225 Difference]: With dead ends: 29470 [2021-11-07 02:05:48,234 INFO L226 Difference]: Without dead ends: 19577 [2021-11-07 02:05:48,251 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 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 02:05:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19577 states. [2021-11-07 02:05:49,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19577 to 19422. [2021-11-07 02:05:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19422 states, 19420 states have (on average 1.8050463439752833) internal successors, (35054), 19421 states have internal predecessors, (35054), 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 02:05:49,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19422 states to 19422 states and 35054 transitions. [2021-11-07 02:05:49,258 INFO L78 Accepts]: Start accepts. Automaton has 19422 states and 35054 transitions. Word has length 66 [2021-11-07 02:05:49,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:49,258 INFO L470 AbstractCegarLoop]: Abstraction has 19422 states and 35054 transitions. [2021-11-07 02:05:49,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:05:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 19422 states and 35054 transitions. [2021-11-07 02:05:49,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:05:49,265 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:49,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:05:49,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:49,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:49,481 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:49,481 INFO L85 PathProgramCache]: Analyzing trace with hash -901460163, now seen corresponding path program 1 times [2021-11-07 02:05:49,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:49,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2014373573] [2021-11-07 02:05:49,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:49,482 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:49,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:49,483 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:49,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:05:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:50,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:05:50,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:50,375 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 02:05:50,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:50,528 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 02:05:50,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:50,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2014373573] [2021-11-07 02:05:50,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2014373573] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:50,529 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:50,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:05:50,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993679326] [2021-11-07 02:05:50,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:05:50,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:50,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:05:50,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:05:50,531 INFO L87 Difference]: Start difference. First operand 19422 states and 35054 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 02:05:52,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:05:52,408 INFO L93 Difference]: Finished difference Result 57694 states and 104171 transitions. [2021-11-07 02:05:52,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:05:52,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:05:52,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:05:52,502 INFO L225 Difference]: With dead ends: 57694 [2021-11-07 02:05:52,503 INFO L226 Difference]: Without dead ends: 38459 [2021-11-07 02:05:52,533 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 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 02:05:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38459 states. [2021-11-07 02:05:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38459 to 38304. [2021-11-07 02:05:54,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38304 states, 38302 states have (on average 1.802490731554488) internal successors, (69039), 38303 states have internal predecessors, (69039), 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 02:05:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38304 states to 38304 states and 69039 transitions. [2021-11-07 02:05:54,716 INFO L78 Accepts]: Start accepts. Automaton has 38304 states and 69039 transitions. Word has length 67 [2021-11-07 02:05:54,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:05:54,717 INFO L470 AbstractCegarLoop]: Abstraction has 38304 states and 69039 transitions. [2021-11-07 02:05:54,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 02:05:54,717 INFO L276 IsEmpty]: Start isEmpty. Operand 38304 states and 69039 transitions. [2021-11-07 02:05:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:05:54,725 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:05:54,726 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:05:54,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:05:54,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:05:54,941 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:05:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:05:54,942 INFO L85 PathProgramCache]: Analyzing trace with hash 389338678, now seen corresponding path program 1 times [2021-11-07 02:05:54,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:05:54,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1277336594] [2021-11-07 02:05:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:05:54,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:05:54,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:05:54,944 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:05:54,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:05:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:05:55,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:05:55,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:05:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:05:55,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:05:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:05:56,047 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:05:56,047 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1277336594] [2021-11-07 02:05:56,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1277336594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:05:56,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:05:56,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:05:56,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155846959] [2021-11-07 02:05:56,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:05:56,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:05:56,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:05:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:05:56,050 INFO L87 Difference]: Start difference. First operand 38304 states and 69039 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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 02:06:03,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:03,538 INFO L93 Difference]: Finished difference Result 148613 states and 267703 transitions. [2021-11-07 02:06:03,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:06:03,538 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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 68 [2021-11-07 02:06:03,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:03,800 INFO L225 Difference]: With dead ends: 148613 [2021-11-07 02:06:03,800 INFO L226 Difference]: Without dead ends: 110562 [2021-11-07 02:06:03,882 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:06:04,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110562 states. [2021-11-07 02:06:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110562 to 38046. [2021-11-07 02:06:06,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38046 states, 38044 states have (on average 1.7875880559352328) internal successors, (68007), 38045 states have internal predecessors, (68007), 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 02:06:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38046 states to 38046 states and 68007 transitions. [2021-11-07 02:06:06,891 INFO L78 Accepts]: Start accepts. Automaton has 38046 states and 68007 transitions. Word has length 68 [2021-11-07 02:06:06,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:06,891 INFO L470 AbstractCegarLoop]: Abstraction has 38046 states and 68007 transitions. [2021-11-07 02:06:06,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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 02:06:06,891 INFO L276 IsEmpty]: Start isEmpty. Operand 38046 states and 68007 transitions. [2021-11-07 02:06:06,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:06:06,899 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:06,900 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:06:06,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 02:06:07,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:07,133 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:07,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:07,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1623422552, now seen corresponding path program 1 times [2021-11-07 02:06:07,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:07,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495953894] [2021-11-07 02:06:07,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:07,134 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:07,135 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:07,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:06:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:07,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:07,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:07,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:06:08,130 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:08,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495953894] [2021-11-07 02:06:08,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495953894] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:08,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:08,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:06:08,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420351418] [2021-11-07 02:06:08,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:06:08,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:08,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:06:08,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:06:08,132 INFO L87 Difference]: Start difference. First operand 38046 states and 68007 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 02:06:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:09,948 INFO L93 Difference]: Finished difference Result 75988 states and 135839 transitions. [2021-11-07 02:06:09,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:09,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 68 [2021-11-07 02:06:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:10,010 INFO L225 Difference]: With dead ends: 75988 [2021-11-07 02:06:10,010 INFO L226 Difference]: Without dead ends: 38201 [2021-11-07 02:06:10,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 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 02:06:10,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38201 states. [2021-11-07 02:06:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38201 to 38046. [2021-11-07 02:06:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38046 states, 38044 states have (on average 1.7842235306487226) internal successors, (67879), 38045 states have internal predecessors, (67879), 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 02:06:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38046 states to 38046 states and 67879 transitions. [2021-11-07 02:06:12,233 INFO L78 Accepts]: Start accepts. Automaton has 38046 states and 67879 transitions. Word has length 68 [2021-11-07 02:06:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:06:12,233 INFO L470 AbstractCegarLoop]: Abstraction has 38046 states and 67879 transitions. [2021-11-07 02:06:12,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 02:06:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 38046 states and 67879 transitions. [2021-11-07 02:06:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:06:12,240 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:06:12,240 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:06:12,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:06:12,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:06:12,456 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 02:06:12,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:06:12,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1906541493, now seen corresponding path program 1 times [2021-11-07 02:06:12,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:06:12,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62595198] [2021-11-07 02:06:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:06:12,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:06:12,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:06:12,458 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:06:12,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e3397391-f6cf-4a29-bfa4-96d01131893e/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:06:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:06:13,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:06:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:06:13,277 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 02:06:13,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:06:13,473 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 02:06:13,473 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:06:13,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62595198] [2021-11-07 02:06:13,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62595198] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:06:13,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:06:13,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:06:13,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562724316] [2021-11-07 02:06:13,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:06:13,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:06:13,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:06:13,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:06:13,475 INFO L87 Difference]: Start difference. First operand 38046 states and 67879 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:06:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:06:16,750 INFO L93 Difference]: Finished difference Result 105726 states and 188265 transitions. [2021-11-07 02:06:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:06:16,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:06:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:06:16,872 INFO L225 Difference]: With dead ends: 105726 [2021-11-07 02:06:16,872 INFO L226 Difference]: Without dead ends: 67899 [2021-11-07 02:06:16,910 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 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 02:06:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67899 states.