./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec0_product24.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_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/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_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/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_83638aac-5959-41ab-87e6-ebee0e79e87c/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 b453d764da4cb622a1911439b5a79bae9155e32b42a83c5d4472e5a8d62a8d39 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:37:15,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:37:15,253 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:37:15,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:37:15,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:37:15,286 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:37:15,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:37:15,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:37:15,292 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:37:15,294 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:37:15,295 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:37:15,296 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:37:15,297 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:37:15,298 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:37:15,300 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:37:15,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:37:15,303 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:37:15,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:37:15,306 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:37:15,309 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:37:15,311 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:37:15,317 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:37:15,319 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:37:15,321 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:37:15,325 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:37:15,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:37:15,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:37:15,335 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:37:15,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:37:15,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:37:15,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:37:15,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:37:15,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:37:15,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:37:15,348 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:37:15,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:37:15,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:37:15,351 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:37:15,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:37:15,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:37:15,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:37:15,354 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:37:15,405 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:37:15,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:37:15,407 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:37:15,407 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:37:15,408 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:37:15,408 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:37:15,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:37:15,409 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:37:15,409 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:37:15,409 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:37:15,418 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:37:15,418 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:37:15,418 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:37:15,419 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:37:15,419 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:37:15,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:37:15,420 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:37:15,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:37:15,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:37:15,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:37:15,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:37:15,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:37:15,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:37:15,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:37:15,422 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:37:15,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:37:15,423 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:37:15,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:37:15,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:37:15,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:37:15,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:15,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:37:15,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:37:15,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:37:15,427 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:37:15,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:37:15,428 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:37:15,428 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:37:15,428 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:37:15,429 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_83638aac-5959-41ab-87e6-ebee0e79e87c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b453d764da4cb622a1911439b5a79bae9155e32b42a83c5d4472e5a8d62a8d39 [2021-11-07 01:37:15,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:37:15,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:37:15,707 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:37:15,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:37:15,710 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:37:15,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product24.cil.c [2021-11-07 01:37:15,815 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data/69ffa5922/278afbd3f70b48d9bac393cdf4ec9c79/FLAG731b6b45e [2021-11-07 01:37:16,464 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:37:16,465 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/sv-benchmarks/c/product-lines/email_spec0_product24.cil.c [2021-11-07 01:37:16,516 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data/69ffa5922/278afbd3f70b48d9bac393cdf4ec9c79/FLAG731b6b45e [2021-11-07 01:37:16,695 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data/69ffa5922/278afbd3f70b48d9bac393cdf4ec9c79 [2021-11-07 01:37:16,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:37:16,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:37:16,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:16,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:37:16,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:37:16,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:16" (1/1) ... [2021-11-07 01:37:16,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29d063b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:16, skipping insertion in model container [2021-11-07 01:37:16,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:16" (1/1) ... [2021-11-07 01:37:16,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:37:16,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:17,341 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_83638aac-5959-41ab-87e6-ebee0e79e87c/sv-benchmarks/c/product-lines/email_spec0_product24.cil.c[25283,25296] [2021-11-07 01:37:17,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:17,500 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:37:17,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6e91d770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:17, skipping insertion in model container [2021-11-07 01:37:17,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:17,502 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:37:17,504 INFO L168 Benchmark]: Toolchain (without parser) took 803.87 ms. Allocated memory is still 144.7 MB. Free memory was 109.1 MB in the beginning and 107.1 MB in the end (delta: 2.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:17,506 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:37:17,508 INFO L168 Benchmark]: CACSL2BoogieTranslator took 801.09 ms. Allocated memory is still 144.7 MB. Free memory was 108.7 MB in the beginning and 107.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:17,510 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 92.3 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 801.09 ms. Allocated memory is still 144.7 MB. Free memory was 108.7 MB in the beginning and 107.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1370]: 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_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/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_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec0_product24.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/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_83638aac-5959-41ab-87e6-ebee0e79e87c/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 b453d764da4cb622a1911439b5a79bae9155e32b42a83c5d4472e5a8d62a8d39 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:37:19,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:37:19,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:37:19,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:37:19,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:37:19,908 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:37:19,910 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:37:19,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:37:19,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:37:19,925 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:37:19,927 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:37:19,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:37:19,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:37:19,932 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:37:19,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:37:19,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:37:19,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:37:19,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:37:19,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:37:19,951 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:37:19,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:37:19,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:37:19,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:37:19,959 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:37:19,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:37:19,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:37:19,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:37:19,971 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:37:19,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:37:19,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:37:19,973 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:37:19,974 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:37:19,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:37:19,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:37:19,978 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:37:19,978 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:37:19,979 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:37:19,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:37:19,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:37:19,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:37:19,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:37:19,983 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:37:20,025 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:37:20,025 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:37:20,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:37:20,027 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:37:20,027 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:37:20,027 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:37:20,027 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:37:20,028 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:37:20,028 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:37:20,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:37:20,030 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:37:20,031 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:37:20,031 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:37:20,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:37:20,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:37:20,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:37:20,032 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:37:20,032 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:37:20,032 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:37:20,032 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:37:20,032 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:37:20,033 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:37:20,033 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:37:20,033 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:37:20,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:37:20,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:37:20,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:20,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:37:20,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:37:20,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:37:20,034 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:37:20,035 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:20,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:37:20,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:37:20,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:37:20,036 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_83638aac-5959-41ab-87e6-ebee0e79e87c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b453d764da4cb622a1911439b5a79bae9155e32b42a83c5d4472e5a8d62a8d39 [2021-11-07 01:37:20,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:37:20,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:37:20,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:37:20,449 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:37:20,452 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:37:20,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec0_product24.cil.c [2021-11-07 01:37:20,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data/bbe98290d/3fbccdb065f7472b8a6d62d7d369384f/FLAG06fbb9938 [2021-11-07 01:37:21,301 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:37:21,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/sv-benchmarks/c/product-lines/email_spec0_product24.cil.c [2021-11-07 01:37:21,329 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data/bbe98290d/3fbccdb065f7472b8a6d62d7d369384f/FLAG06fbb9938 [2021-11-07 01:37:21,520 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/data/bbe98290d/3fbccdb065f7472b8a6d62d7d369384f [2021-11-07 01:37:21,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:37:21,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:37:21,530 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:21,531 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:37:21,534 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:37:21,535 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:21" (1/1) ... [2021-11-07 01:37:21,537 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c26ef2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:21, skipping insertion in model container [2021-11-07 01:37:21,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:21" (1/1) ... [2021-11-07 01:37:21,546 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:37:21,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:22,086 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_83638aac-5959-41ab-87e6-ebee0e79e87c/sv-benchmarks/c/product-lines/email_spec0_product24.cil.c[25283,25296] [2021-11-07 01:37:22,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:22,272 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:37:22,290 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:22,350 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_83638aac-5959-41ab-87e6-ebee0e79e87c/sv-benchmarks/c/product-lines/email_spec0_product24.cil.c[25283,25296] [2021-11-07 01:37:22,449 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:22,459 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:37:22,510 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_83638aac-5959-41ab-87e6-ebee0e79e87c/sv-benchmarks/c/product-lines/email_spec0_product24.cil.c[25283,25296] [2021-11-07 01:37:22,556 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:22,614 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:37:22,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22 WrapperNode [2021-11-07 01:37:22,614 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:22,615 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:22,615 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:37:22,616 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:37:22,624 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,834 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:22,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:37:22,836 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:37:22,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:37:22,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,861 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:22,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:37:22,993 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:37:22,993 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:37:22,993 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:37:22,994 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (1/1) ... [2021-11-07 01:37:23,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:23,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:23,023 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:37:23,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:37:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:37:23,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:37:23,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:37:23,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:37:23,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:37:27,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:37:27,393 INFO L299 CfgBuilder]: Removed 323 assume(true) statements. [2021-11-07 01:37:27,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:27 BoogieIcfgContainer [2021-11-07 01:37:27,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:37:27,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:37:27,397 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:37:27,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:37:27,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:37:21" (1/3) ... [2021-11-07 01:37:27,401 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76236dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:27, skipping insertion in model container [2021-11-07 01:37:27,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:22" (2/3) ... [2021-11-07 01:37:27,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76236dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:27, skipping insertion in model container [2021-11-07 01:37:27,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:27" (3/3) ... [2021-11-07 01:37:27,404 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec0_product24.cil.c [2021-11-07 01:37:27,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:37:27,410 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-07 01:37:27,476 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:37:27,484 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:37:27,485 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-07 01:37:27,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 463 states, 460 states have (on average 1.7369565217391305) internal successors, (799), 462 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:37:27,550 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:27,551 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] [2021-11-07 01:37:27,555 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:27,560 INFO L85 PathProgramCache]: Analyzing trace with hash -93800768, now seen corresponding path program 1 times [2021-11-07 01:37:27,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:27,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [513657653] [2021-11-07 01:37:27,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:27,576 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:27,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:27,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:27,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:37:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:28,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:37:28,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:28,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:28,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:28,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [513657653] [2021-11-07 01:37:28,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [513657653] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:28,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:28,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:37:28,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600350251] [2021-11-07 01:37:28,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:37:28,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:28,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:37:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:37:28,394 INFO L87 Difference]: Start difference. First operand has 463 states, 460 states have (on average 1.7369565217391305) internal successors, (799), 462 states have internal predecessors, (799), 0 states have call successors, (0), 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 25.5) internal successors, (51), 2 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 01:37:28,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:28,467 INFO L93 Difference]: Finished difference Result 680 states and 1150 transitions. [2021-11-07 01:37:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:37:28,468 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 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 51 [2021-11-07 01:37:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:28,489 INFO L225 Difference]: With dead ends: 680 [2021-11-07 01:37:28,493 INFO L226 Difference]: Without dead ends: 436 [2021-11-07 01:37:28,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 100 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 01:37:28,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-11-07 01:37:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2021-11-07 01:37:28,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 434 states have (on average 1.7350230414746544) internal successors, (753), 435 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 753 transitions. [2021-11-07 01:37:28,585 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 753 transitions. Word has length 51 [2021-11-07 01:37:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:28,585 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 753 transitions. [2021-11-07 01:37:28,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 25.5) internal successors, (51), 2 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 01:37:28,586 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 753 transitions. [2021-11-07 01:37:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 01:37:28,591 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:28,591 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] [2021-11-07 01:37:28,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:28,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:28,800 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:28,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1750950259, now seen corresponding path program 1 times [2021-11-07 01:37:28,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:28,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [738038286] [2021-11-07 01:37:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:28,802 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:28,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:28,804 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:28,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:37:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:29,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:37:29,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:29,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:29,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:29,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:29,512 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:29,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [738038286] [2021-11-07 01:37:29,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [738038286] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:29,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:29,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:37:29,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899359421] [2021-11-07 01:37:29,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:29,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:29,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:29,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:29,520 INFO L87 Difference]: Start difference. First operand 436 states and 753 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:29,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:29,632 INFO L93 Difference]: Finished difference Result 1278 states and 2211 transitions. [2021-11-07 01:37:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:29,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 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 52 [2021-11-07 01:37:29,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:29,643 INFO L225 Difference]: With dead ends: 1278 [2021-11-07 01:37:29,643 INFO L226 Difference]: Without dead ends: 857 [2021-11-07 01:37:29,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2021-11-07 01:37:29,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 435. [2021-11-07 01:37:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 433 states have (on average 1.7274826789838338) internal successors, (748), 434 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 748 transitions. [2021-11-07 01:37:29,713 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 748 transitions. Word has length 52 [2021-11-07 01:37:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:29,714 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 748 transitions. [2021-11-07 01:37:29,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 748 transitions. [2021-11-07 01:37:29,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:37:29,727 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:29,728 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] [2021-11-07 01:37:29,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:29,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:29,929 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:29,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1826241613, now seen corresponding path program 1 times [2021-11-07 01:37:29,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:29,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1772768101] [2021-11-07 01:37:29,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:29,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:29,932 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:29,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:37:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:30,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:37:30,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:30,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:30,788 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:30,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1772768101] [2021-11-07 01:37:30,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1772768101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:30,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:30,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:37:30,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318285738] [2021-11-07 01:37:30,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:30,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:30,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:30,791 INFO L87 Difference]: Start difference. First operand 435 states and 748 transitions. Second operand has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:31,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:31,024 INFO L93 Difference]: Finished difference Result 1657 states and 2854 transitions. [2021-11-07 01:37:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:37:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 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 54 [2021-11-07 01:37:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:31,036 INFO L225 Difference]: With dead ends: 1657 [2021-11-07 01:37:31,036 INFO L226 Difference]: Without dead ends: 1240 [2021-11-07 01:37:31,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 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 01:37:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2021-11-07 01:37:31,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 434. [2021-11-07 01:37:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 432 states have (on average 1.7222222222222223) internal successors, (744), 433 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:31,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 744 transitions. [2021-11-07 01:37:31,093 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 744 transitions. Word has length 54 [2021-11-07 01:37:31,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:31,093 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 744 transitions. [2021-11-07 01:37:31,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.833333333333334) internal successors, (59), 6 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 744 transitions. [2021-11-07 01:37:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 01:37:31,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:31,097 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] [2021-11-07 01:37:31,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:31,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:31,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash -2010088486, now seen corresponding path program 1 times [2021-11-07 01:37:31,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:31,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129724297] [2021-11-07 01:37:31,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:31,318 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:31,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:31,323 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:31,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:37:31,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:31,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:37:31,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:31,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:31,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:32,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:32,181 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:32,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129724297] [2021-11-07 01:37:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129724297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:32,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:32,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:37:32,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927755186] [2021-11-07 01:37:32,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:32,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:32,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:32,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:32,186 INFO L87 Difference]: Start difference. First operand 434 states and 744 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:32,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:32,261 INFO L93 Difference]: Finished difference Result 865 states and 1485 transitions. [2021-11-07 01:37:32,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:32,261 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 01:37:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:32,265 INFO L225 Difference]: With dead ends: 865 [2021-11-07 01:37:32,265 INFO L226 Difference]: Without dead ends: 439 [2021-11-07 01:37:32,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-07 01:37:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 434. [2021-11-07 01:37:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 432 states have (on average 1.7152777777777777) internal successors, (741), 433 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 741 transitions. [2021-11-07 01:37:32,300 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 741 transitions. Word has length 55 [2021-11-07 01:37:32,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:32,302 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 741 transitions. [2021-11-07 01:37:32,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:32,302 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 741 transitions. [2021-11-07 01:37:32,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 01:37:32,305 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:32,305 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] [2021-11-07 01:37:32,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:32,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:32,519 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:32,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:32,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1103890331, now seen corresponding path program 1 times [2021-11-07 01:37:32,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:32,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668534334] [2021-11-07 01:37:32,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:32,521 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:32,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:32,522 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:32,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:37:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:32,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:37:32,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:33,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:33,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:33,319 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:33,319 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668534334] [2021-11-07 01:37:33,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668534334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:33,320 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:33,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:37:33,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238143496] [2021-11-07 01:37:33,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:33,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:33,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:33,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:33,322 INFO L87 Difference]: Start difference. First operand 434 states and 741 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 01:37:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:33,582 INFO L93 Difference]: Finished difference Result 1644 states and 2830 transitions. [2021-11-07 01:37:33,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:37:33,583 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 56 [2021-11-07 01:37:33,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:33,592 INFO L225 Difference]: With dead ends: 1644 [2021-11-07 01:37:33,592 INFO L226 Difference]: Without dead ends: 1236 [2021-11-07 01:37:33,594 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 106 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 01:37:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2021-11-07 01:37:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 434. [2021-11-07 01:37:33,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 432 states have (on average 1.7083333333333333) internal successors, (738), 433 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 738 transitions. [2021-11-07 01:37:33,642 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 738 transitions. Word has length 56 [2021-11-07 01:37:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:33,643 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 738 transitions. [2021-11-07 01:37:33,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 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 01:37:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 738 transitions. [2021-11-07 01:37:33,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:37:33,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:33,645 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] [2021-11-07 01:37:33,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:33,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:33,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:33,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:33,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2084503158, now seen corresponding path program 1 times [2021-11-07 01:37:33,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:33,864 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907202162] [2021-11-07 01:37:33,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:33,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:33,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:33,866 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:33,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:37:34,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:34,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:34,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:34,634 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:34,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907202162] [2021-11-07 01:37:34,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907202162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:34,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:34,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:37:34,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755310735] [2021-11-07 01:37:34,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:34,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:34,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:34,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:34,637 INFO L87 Difference]: Start difference. First operand 434 states and 738 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 01:37:34,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:34,730 INFO L93 Difference]: Finished difference Result 1032 states and 1754 transitions. [2021-11-07 01:37:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:34,730 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 58 [2021-11-07 01:37:34,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:34,736 INFO L225 Difference]: With dead ends: 1032 [2021-11-07 01:37:34,736 INFO L226 Difference]: Without dead ends: 842 [2021-11-07 01:37:34,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-07 01:37:34,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 652. [2021-11-07 01:37:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 650 states have (on average 1.7476923076923077) internal successors, (1136), 651 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 1136 transitions. [2021-11-07 01:37:34,792 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 1136 transitions. Word has length 58 [2021-11-07 01:37:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:34,792 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 1136 transitions. [2021-11-07 01:37:34,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 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 01:37:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 1136 transitions. [2021-11-07 01:37:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 01:37:34,795 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:34,795 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, 1, 1] [2021-11-07 01:37:34,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:35,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:35,015 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:35,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:35,016 INFO L85 PathProgramCache]: Analyzing trace with hash 222464889, now seen corresponding path program 1 times [2021-11-07 01:37:35,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:35,016 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1944873223] [2021-11-07 01:37:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:35,016 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:35,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:35,017 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:35,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:37:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:35,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:35,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:35,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1944873223] [2021-11-07 01:37:35,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1944873223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:35,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:35,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:35,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978639527] [2021-11-07 01:37:35,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:35,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:35,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:35,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:35,845 INFO L87 Difference]: Start difference. First operand 652 states and 1136 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:35,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:35,939 INFO L93 Difference]: Finished difference Result 1576 states and 2749 transitions. [2021-11-07 01:37:35,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:35,940 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2021-11-07 01:37:35,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:35,947 INFO L225 Difference]: With dead ends: 1576 [2021-11-07 01:37:35,947 INFO L226 Difference]: Without dead ends: 1008 [2021-11-07 01:37:35,948 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-11-07 01:37:36,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 818. [2021-11-07 01:37:36,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 816 states have (on average 1.7610294117647058) internal successors, (1437), 817 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 1437 transitions. [2021-11-07 01:37:36,018 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 1437 transitions. Word has length 70 [2021-11-07 01:37:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:36,019 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 1437 transitions. [2021-11-07 01:37:36,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 1437 transitions. [2021-11-07 01:37:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 01:37:36,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:36,022 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, 1, 1, 1] [2021-11-07 01:37:36,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:36,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:36,239 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:36,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:36,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1965041338, now seen corresponding path program 1 times [2021-11-07 01:37:36,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:36,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895048080] [2021-11-07 01:37:36,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:36,241 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:36,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:36,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:36,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:37:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:36,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:36,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:37,087 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:37,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895048080] [2021-11-07 01:37:37,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895048080] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:37,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:37,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:37,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211776458] [2021-11-07 01:37:37,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:37,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:37,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:37,089 INFO L87 Difference]: Start difference. First operand 818 states and 1437 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:37,204 INFO L93 Difference]: Finished difference Result 2106 states and 3717 transitions. [2021-11-07 01:37:37,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:37,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 01:37:37,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:37,213 INFO L225 Difference]: With dead ends: 2106 [2021-11-07 01:37:37,214 INFO L226 Difference]: Without dead ends: 1380 [2021-11-07 01:37:37,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:37,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-11-07 01:37:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1190. [2021-11-07 01:37:37,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1188 states have (on average 1.7803030303030303) internal successors, (2115), 1189 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:37,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 2115 transitions. [2021-11-07 01:37:37,324 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 2115 transitions. Word has length 71 [2021-11-07 01:37:37,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:37,324 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 2115 transitions. [2021-11-07 01:37:37,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 2115 transitions. [2021-11-07 01:37:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 01:37:37,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:37,328 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, 1, 1, 1, 1] [2021-11-07 01:37:37,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:37,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:37,543 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash 211185547, now seen corresponding path program 1 times [2021-11-07 01:37:37,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:37,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1578006177] [2021-11-07 01:37:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:37,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:37,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:37,546 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:37,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:37:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:38,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:38,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:38,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:38,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:38,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1578006177] [2021-11-07 01:37:38,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1578006177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:38,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:38,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:38,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389136798] [2021-11-07 01:37:38,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:38,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:38,498 INFO L87 Difference]: Start difference. First operand 1190 states and 2115 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:38,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:38,689 INFO L93 Difference]: Finished difference Result 3202 states and 5720 transitions. [2021-11-07 01:37:38,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:38,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 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 72 [2021-11-07 01:37:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:38,704 INFO L225 Difference]: With dead ends: 3202 [2021-11-07 01:37:38,704 INFO L226 Difference]: Without dead ends: 2112 [2021-11-07 01:37:38,709 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-11-07 01:37:38,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 1922. [2021-11-07 01:37:38,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1920 states have (on average 1.796875) internal successors, (3450), 1921 states have internal predecessors, (3450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 3450 transitions. [2021-11-07 01:37:38,892 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 3450 transitions. Word has length 72 [2021-11-07 01:37:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:38,892 INFO L470 AbstractCegarLoop]: Abstraction has 1922 states and 3450 transitions. [2021-11-07 01:37:38,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 3450 transitions. [2021-11-07 01:37:38,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:37:38,904 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:38,904 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, 1, 1, 1, 1, 1] [2021-11-07 01:37:38,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:39,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:39,125 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash 531882507, now seen corresponding path program 1 times [2021-11-07 01:37:39,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:39,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721114960] [2021-11-07 01:37:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:39,126 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:39,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:39,127 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:39,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:37:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:39,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:39,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:39,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:39,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:40,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:40,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721114960] [2021-11-07 01:37:40,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721114960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:40,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:40,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:40,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855957756] [2021-11-07 01:37:40,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:40,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:40,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:40,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:40,125 INFO L87 Difference]: Start difference. First operand 1922 states and 3450 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:40,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:40,366 INFO L93 Difference]: Finished difference Result 5134 states and 9244 transitions. [2021-11-07 01:37:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:40,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-11-07 01:37:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:40,388 INFO L225 Difference]: With dead ends: 5134 [2021-11-07 01:37:40,388 INFO L226 Difference]: Without dead ends: 3346 [2021-11-07 01:37:40,391 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:40,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3346 states. [2021-11-07 01:37:40,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3346 to 3156. [2021-11-07 01:37:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3154 states have (on average 1.8056436271401395) internal successors, (5695), 3155 states have internal predecessors, (5695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 5695 transitions. [2021-11-07 01:37:40,657 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 5695 transitions. Word has length 73 [2021-11-07 01:37:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:40,657 INFO L470 AbstractCegarLoop]: Abstraction has 3156 states and 5695 transitions. [2021-11-07 01:37:40,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 5695 transitions. [2021-11-07 01:37:40,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 01:37:40,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:40,663 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, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:40,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:40,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:40,880 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:40,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:40,880 INFO L85 PathProgramCache]: Analyzing trace with hash 184071226, now seen corresponding path program 1 times [2021-11-07 01:37:40,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:40,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1522739707] [2021-11-07 01:37:40,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:40,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:40,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:40,882 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:40,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:37:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:41,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:41,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:41,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:41,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:41,853 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:41,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1522739707] [2021-11-07 01:37:41,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1522739707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:41,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:41,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:41,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481792327] [2021-11-07 01:37:41,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:41,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:41,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:41,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:41,856 INFO L87 Difference]: Start difference. First operand 3156 states and 5695 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:42,326 INFO L93 Difference]: Finished difference Result 8552 states and 15462 transitions. [2021-11-07 01:37:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-11-07 01:37:42,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:42,371 INFO L225 Difference]: With dead ends: 8552 [2021-11-07 01:37:42,371 INFO L226 Difference]: Without dead ends: 5564 [2021-11-07 01:37:42,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5564 states. [2021-11-07 01:37:42,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5564 to 5374. [2021-11-07 01:37:42,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5374 states, 5372 states have (on average 1.8093819806403575) internal successors, (9720), 5373 states have internal predecessors, (9720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:42,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5374 states to 5374 states and 9720 transitions. [2021-11-07 01:37:42,862 INFO L78 Accepts]: Start accepts. Automaton has 5374 states and 9720 transitions. Word has length 74 [2021-11-07 01:37:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:42,864 INFO L470 AbstractCegarLoop]: Abstraction has 5374 states and 9720 transitions. [2021-11-07 01:37:42,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 5374 states and 9720 transitions. [2021-11-07 01:37:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:37:42,875 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:42,875 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:42,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:43,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:43,094 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:43,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:43,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1697215526, now seen corresponding path program 1 times [2021-11-07 01:37:43,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:43,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1780210196] [2021-11-07 01:37:43,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:43,096 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:43,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:43,097 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:43,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:37:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:43,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:43,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:44,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:44,143 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:44,144 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1780210196] [2021-11-07 01:37:44,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1780210196] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:44,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:44,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:44,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332023745] [2021-11-07 01:37:44,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:44,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:44,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:44,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:44,146 INFO L87 Difference]: Start difference. First operand 5374 states and 9720 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 01:37:44,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:44,875 INFO L93 Difference]: Finished difference Result 15532 states and 28148 transitions. [2021-11-07 01:37:44,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:44,876 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 75 [2021-11-07 01:37:44,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:44,939 INFO L225 Difference]: With dead ends: 15532 [2021-11-07 01:37:44,939 INFO L226 Difference]: Without dead ends: 10334 [2021-11-07 01:37:44,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-11-07 01:37:45,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10144. [2021-11-07 01:37:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10142 states have (on average 1.8119700256359692) internal successors, (18377), 10143 states have internal predecessors, (18377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:45,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 18377 transitions. [2021-11-07 01:37:45,784 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 18377 transitions. Word has length 75 [2021-11-07 01:37:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:45,784 INFO L470 AbstractCegarLoop]: Abstraction has 10144 states and 18377 transitions. [2021-11-07 01:37:45,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 01:37:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 18377 transitions. [2021-11-07 01:37:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:37:45,797 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:45,797 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:45,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:46,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:46,016 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:46,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:46,016 INFO L85 PathProgramCache]: Analyzing trace with hash -765024534, now seen corresponding path program 1 times [2021-11-07 01:37:46,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:46,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652132239] [2021-11-07 01:37:46,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:46,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:46,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:46,019 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:46,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:37:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:46,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:37:46,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:46,903 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 01:37:46,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:47,176 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 01:37:47,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:47,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652132239] [2021-11-07 01:37:47,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652132239] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:47,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:47,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:37:47,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313742241] [2021-11-07 01:37:47,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:47,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:47,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:47,180 INFO L87 Difference]: Start difference. First operand 10144 states and 18377 transitions. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:50,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:50,297 INFO L93 Difference]: Finished difference Result 24991 states and 45284 transitions. [2021-11-07 01:37:50,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:37:50,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:37:50,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:50,348 INFO L225 Difference]: With dead ends: 24991 [2021-11-07 01:37:50,348 INFO L226 Difference]: Without dead ends: 15101 [2021-11-07 01:37:50,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 146 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 01:37:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15101 states. [2021-11-07 01:37:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15101 to 10111. [2021-11-07 01:37:51,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10111 states, 10109 states have (on average 1.8048273815412008) internal successors, (18245), 10110 states have internal predecessors, (18245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:51,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10111 states to 10111 states and 18245 transitions. [2021-11-07 01:37:51,071 INFO L78 Accepts]: Start accepts. Automaton has 10111 states and 18245 transitions. Word has length 76 [2021-11-07 01:37:51,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:51,071 INFO L470 AbstractCegarLoop]: Abstraction has 10111 states and 18245 transitions. [2021-11-07 01:37:51,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:51,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10111 states and 18245 transitions. [2021-11-07 01:37:51,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 01:37:51,081 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:51,081 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:51,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:51,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:51,297 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:51,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:51,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1923582571, now seen corresponding path program 1 times [2021-11-07 01:37:51,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:51,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960068981] [2021-11-07 01:37:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:51,299 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:51,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:51,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:51,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:37:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:52,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:52,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:52,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:52,627 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 01:37:52,627 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:52,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960068981] [2021-11-07 01:37:52,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960068981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:52,627 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:52,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:52,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696014593] [2021-11-07 01:37:52,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:52,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:52,629 INFO L87 Difference]: Start difference. First operand 10111 states and 18245 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:53,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:53,507 INFO L93 Difference]: Finished difference Result 29575 states and 53430 transitions. [2021-11-07 01:37:53,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:53,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-11-07 01:37:53,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:53,564 INFO L225 Difference]: With dead ends: 29575 [2021-11-07 01:37:53,564 INFO L226 Difference]: Without dead ends: 19647 [2021-11-07 01:37:53,582 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:53,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19647 states. [2021-11-07 01:37:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19647 to 19457. [2021-11-07 01:37:54,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19457 states, 19455 states have (on average 1.8046774608069904) internal successors, (35110), 19456 states have internal predecessors, (35110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:54,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19457 states to 19457 states and 35110 transitions. [2021-11-07 01:37:54,659 INFO L78 Accepts]: Start accepts. Automaton has 19457 states and 35110 transitions. Word has length 76 [2021-11-07 01:37:54,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:54,659 INFO L470 AbstractCegarLoop]: Abstraction has 19457 states and 35110 transitions. [2021-11-07 01:37:54,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:54,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19457 states and 35110 transitions. [2021-11-07 01:37:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 01:37:54,672 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:54,672 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:54,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:54,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:54,888 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:37:54,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:54,889 INFO L85 PathProgramCache]: Analyzing trace with hash 911949739, now seen corresponding path program 1 times [2021-11-07 01:37:54,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:54,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [943232971] [2021-11-07 01:37:54,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:54,889 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:54,890 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:54,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:37:55,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:55,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:37:55,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:55,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:55,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:55,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:55,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [943232971] [2021-11-07 01:37:55,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [943232971] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:55,877 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:55,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:37:55,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441345662] [2021-11-07 01:37:55,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:37:55,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:55,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:37:55,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:55,880 INFO L87 Difference]: Start difference. First operand 19457 states and 35110 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:57,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:57,405 INFO L93 Difference]: Finished difference Result 57799 states and 104339 transitions. [2021-11-07 01:37:57,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:37:57,406 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-11-07 01:37:57,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:57,510 INFO L225 Difference]: With dead ends: 57799 [2021-11-07 01:37:57,511 INFO L226 Difference]: Without dead ends: 38529 [2021-11-07 01:37:57,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:37:57,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38529 states. [2021-11-07 01:37:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38529 to 38339. [2021-11-07 01:37:59,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38339 states, 38337 states have (on average 1.8023058663953884) internal successors, (69095), 38338 states have internal predecessors, (69095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38339 states to 38339 states and 69095 transitions. [2021-11-07 01:37:59,858 INFO L78 Accepts]: Start accepts. Automaton has 38339 states and 69095 transitions. Word has length 77 [2021-11-07 01:37:59,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:59,858 INFO L470 AbstractCegarLoop]: Abstraction has 38339 states and 69095 transitions. [2021-11-07 01:37:59,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:59,859 INFO L276 IsEmpty]: Start isEmpty. Operand 38339 states and 69095 transitions. [2021-11-07 01:37:59,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:37:59,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:59,872 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:59,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:00,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:00,081 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:00,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:00,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1173201764, now seen corresponding path program 1 times [2021-11-07 01:38:00,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:00,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230692585] [2021-11-07 01:38:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:00,083 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:00,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:00,085 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:00,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:38:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:01,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:01,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:01,355 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 01:38:01,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:01,618 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 01:38:01,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:01,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230692585] [2021-11-07 01:38:01,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230692585] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:01,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:01,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:38:01,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545190438] [2021-11-07 01:38:01,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:01,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:01,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:38:01,620 INFO L87 Difference]: Start difference. First operand 38339 states and 69095 transitions. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:07,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:07,956 INFO L93 Difference]: Finished difference Result 148753 states and 267927 transitions. [2021-11-07 01:38:07,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:38:07,957 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:38:07,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:08,210 INFO L225 Difference]: With dead ends: 148753 [2021-11-07 01:38:08,211 INFO L226 Difference]: Without dead ends: 110667 [2021-11-07 01:38:08,259 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 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 01:38:08,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110667 states. [2021-11-07 01:38:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110667 to 38081. [2021-11-07 01:38:11,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38081 states, 38079 states have (on average 1.7874156359148088) internal successors, (68063), 38080 states have internal predecessors, (68063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38081 states to 38081 states and 68063 transitions. [2021-11-07 01:38:11,380 INFO L78 Accepts]: Start accepts. Automaton has 38081 states and 68063 transitions. Word has length 78 [2021-11-07 01:38:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:11,380 INFO L470 AbstractCegarLoop]: Abstraction has 38081 states and 68063 transitions. [2021-11-07 01:38:11,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 38081 states and 68063 transitions. [2021-11-07 01:38:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:38:11,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:11,393 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:11,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:11,594 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash 739508486, now seen corresponding path program 1 times [2021-11-07 01:38:11,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:11,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744318799] [2021-11-07 01:38:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:11,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:11,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:11,595 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:11,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:38:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:12,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:12,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:12,524 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 01:38:12,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:12,709 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 01:38:12,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:12,710 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744318799] [2021-11-07 01:38:12,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1744318799] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:12,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:12,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:38:12,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861247899] [2021-11-07 01:38:12,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:38:12,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:38:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:38:12,712 INFO L87 Difference]: Start difference. First operand 38081 states and 68063 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:14,717 INFO L93 Difference]: Finished difference Result 76093 states and 136007 transitions. [2021-11-07 01:38:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:14,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:38:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:14,803 INFO L225 Difference]: With dead ends: 76093 [2021-11-07 01:38:14,804 INFO L226 Difference]: Without dead ends: 38271 [2021-11-07 01:38:14,840 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:38:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38271 states. [2021-11-07 01:38:16,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38271 to 38081. [2021-11-07 01:38:16,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38081 states, 38079 states have (on average 1.7840542031040731) internal successors, (67935), 38080 states have internal predecessors, (67935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38081 states to 38081 states and 67935 transitions. [2021-11-07 01:38:17,037 INFO L78 Accepts]: Start accepts. Automaton has 38081 states and 67935 transitions. Word has length 78 [2021-11-07 01:38:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:17,038 INFO L470 AbstractCegarLoop]: Abstraction has 38081 states and 67935 transitions. [2021-11-07 01:38:17,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 38081 states and 67935 transitions. [2021-11-07 01:38:17,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 01:38:17,046 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:17,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:17,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:17,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:17,260 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:17,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:17,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1157598407, now seen corresponding path program 1 times [2021-11-07 01:38:17,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:17,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [29042334] [2021-11-07 01:38:17,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:17,261 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:17,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:17,262 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:17,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:38:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:17,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:18,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:18,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:18,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [29042334] [2021-11-07 01:38:18,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [29042334] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:18,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:18,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:18,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287907589] [2021-11-07 01:38:18,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:18,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:18,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:18,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:18,381 INFO L87 Difference]: Start difference. First operand 38081 states and 67935 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:21,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:21,516 INFO L93 Difference]: Finished difference Result 105831 states and 188433 transitions. [2021-11-07 01:38:21,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:21,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-11-07 01:38:21,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:21,626 INFO L225 Difference]: With dead ends: 105831 [2021-11-07 01:38:21,626 INFO L226 Difference]: Without dead ends: 67969 [2021-11-07 01:38:21,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:21,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67969 states. [2021-11-07 01:38:25,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67969 to 67779. [2021-11-07 01:38:25,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67779 states, 67777 states have (on average 1.7747613497204067) internal successors, (120288), 67778 states have internal predecessors, (120288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67779 states to 67779 states and 120288 transitions. [2021-11-07 01:38:25,409 INFO L78 Accepts]: Start accepts. Automaton has 67779 states and 120288 transitions. Word has length 78 [2021-11-07 01:38:25,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:25,410 INFO L470 AbstractCegarLoop]: Abstraction has 67779 states and 120288 transitions. [2021-11-07 01:38:25,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 67779 states and 120288 transitions. [2021-11-07 01:38:25,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:38:25,422 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:25,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:25,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:25,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:25,643 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:38:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1063463552, now seen corresponding path program 1 times [2021-11-07 01:38:25,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:25,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067582164] [2021-11-07 01:38:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:25,644 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:25,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:25,645 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:25,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:38:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:26,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:26,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:26,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:26,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:26,906 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:26,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067582164] [2021-11-07 01:38:26,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067582164] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:26,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1550628029] [2021-11-07 01:38:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:26,907 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:26,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:26,920 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:26,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83638aac-5959-41ab-87e6-ebee0e79e87c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:38:27,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:27,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:38:27,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:28,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:28,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:28,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1550628029] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:28,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:28,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 16 [2021-11-07 01:38:28,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078802367] [2021-11-07 01:38:28,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:38:28,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:38:28,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-11-07 01:38:28,522 INFO L87 Difference]: Start difference. First operand 67779 states and 120288 transitions. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)