./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec7_product27.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_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/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_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/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_8b235e70-c77d-47c6-8373-6be627bf2876/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 ac03fde86830071a4c6b2e5721972db0abe9813dd0e80632e775695a294f996c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:02:46,410 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:46,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:46,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:46,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:46,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:46,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:46,467 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:46,469 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:46,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:46,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:46,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:46,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:46,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:46,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:46,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:46,480 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:46,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:46,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:46,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:46,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:46,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:46,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:46,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:46,499 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:46,500 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:46,500 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:46,501 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:46,502 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:46,503 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:46,504 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:46,505 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:46,505 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:46,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:46,512 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:46,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:46,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:46,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:46,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:46,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:46,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:46,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:02:46,545 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:46,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:46,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:46,547 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:46,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:46,547 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:46,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:02:46,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:46,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:46,548 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:02:46,549 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:02:46,549 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:46,549 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:02:46,549 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:02:46,550 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:02:46,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:46,551 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:02:46,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:02:46,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:02:46,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:46,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:02:46,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:46,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:02:46,552 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:46,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:02:46,553 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:02:46,553 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:46,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:02:46,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:46,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:46,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:46,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:46,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:46,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:02:46,555 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:02:46,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:02:46,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:02:46,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:46,555 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:46,556 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_8b235e70-c77d-47c6-8373-6be627bf2876/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac03fde86830071a4c6b2e5721972db0abe9813dd0e80632e775695a294f996c [2021-11-07 02:02:46,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:46,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:46,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:46,922 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:46,923 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:46,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product27.cil.c [2021-11-07 02:02:47,020 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data/64c0deacb/db0a3985b9e94ff1b20bd30f1e25f717/FLAG87c4e7d30 [2021-11-07 02:02:47,691 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:47,691 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/sv-benchmarks/c/product-lines/email_spec7_product27.cil.c [2021-11-07 02:02:47,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data/64c0deacb/db0a3985b9e94ff1b20bd30f1e25f717/FLAG87c4e7d30 [2021-11-07 02:02:47,887 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data/64c0deacb/db0a3985b9e94ff1b20bd30f1e25f717 [2021-11-07 02:02:47,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:47,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:47,893 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:47,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:47,897 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:47,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:47" (1/1) ... [2021-11-07 02:02:47,899 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@470ad812 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:47, skipping insertion in model container [2021-11-07 02:02:47,900 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:47" (1/1) ... [2021-11-07 02:02:47,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:48,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:48,407 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_8b235e70-c77d-47c6-8373-6be627bf2876/sv-benchmarks/c/product-lines/email_spec7_product27.cil.c[14691,14704] [2021-11-07 02:02:48,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:48,688 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:02:48,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@44c0be4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:48, skipping insertion in model container [2021-11-07 02:02:48,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:48,690 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:02:48,692 INFO L168 Benchmark]: Toolchain (without parser) took 799.05 ms. Allocated memory is still 102.8 MB. Free memory was 58.6 MB in the beginning and 65.6 MB in the end (delta: -6.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:48,692 INFO L168 Benchmark]: CDTParser took 0.90 ms. Allocated memory is still 102.8 MB. Free memory is still 77.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:02:48,693 INFO L168 Benchmark]: CACSL2BoogieTranslator took 796.39 ms. Allocated memory is still 102.8 MB. Free memory was 58.5 MB in the beginning and 65.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2021-11-07 02:02:48,695 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.90 ms. Allocated memory is still 102.8 MB. Free memory is still 77.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 796.39 ms. Allocated memory is still 102.8 MB. Free memory was 58.5 MB in the beginning and 65.6 MB in the end (delta: -7.1 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2550]: 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_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/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_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec7_product27.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/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_8b235e70-c77d-47c6-8373-6be627bf2876/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 ac03fde86830071a4c6b2e5721972db0abe9813dd0e80632e775695a294f996c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:02:51,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:02:51,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:02:51,322 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:02:51,323 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:02:51,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:02:51,330 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:02:51,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:02:51,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:02:51,347 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:02:51,349 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:02:51,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:02:51,352 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:02:51,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:02:51,358 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:02:51,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:02:51,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:02:51,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:02:51,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:02:51,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:02:51,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:02:51,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:02:51,387 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:02:51,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:02:51,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:02:51,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:02:51,401 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:02:51,403 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:02:51,404 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:02:51,405 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:02:51,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:02:51,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:02:51,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:02:51,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:02:51,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:02:51,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:02:51,419 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:02:51,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:02:51,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:02:51,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:02:51,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:02:51,425 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:02:51,475 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:02:51,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:02:51,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:02:51,477 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:02:51,477 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:02:51,478 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:02:51,478 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:02:51,478 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:02:51,479 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:02:51,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:02:51,483 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:02:51,483 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:02:51,483 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:02:51,484 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:02:51,484 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:02:51,484 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:02:51,484 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:02:51,485 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:02:51,485 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:02:51,485 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:02:51,485 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:02:51,486 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:02:51,486 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:02:51,486 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:02:51,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:02:51,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:02:51,487 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:51,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:02:51,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:02:51,488 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:02:51,488 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:02:51,489 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:02:51,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:02:51,489 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:02:51,490 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:02:51,490 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_8b235e70-c77d-47c6-8373-6be627bf2876/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac03fde86830071a4c6b2e5721972db0abe9813dd0e80632e775695a294f996c [2021-11-07 02:02:51,969 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:02:52,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:02:52,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:02:52,023 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:02:52,023 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:02:52,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec7_product27.cil.c [2021-11-07 02:02:52,120 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data/d96025259/82db1ad33e404f00b8149fbd89bd21b6/FLAGe4216cfa0 [2021-11-07 02:02:52,962 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:02:52,963 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/sv-benchmarks/c/product-lines/email_spec7_product27.cil.c [2021-11-07 02:02:52,990 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data/d96025259/82db1ad33e404f00b8149fbd89bd21b6/FLAGe4216cfa0 [2021-11-07 02:02:53,091 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/data/d96025259/82db1ad33e404f00b8149fbd89bd21b6 [2021-11-07 02:02:53,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:02:53,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:02:53,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:53,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:02:53,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:02:53,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:53" (1/1) ... [2021-11-07 02:02:53,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@305273ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:53, skipping insertion in model container [2021-11-07 02:02:53,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:02:53" (1/1) ... [2021-11-07 02:02:53,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:02:53,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:53,727 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_8b235e70-c77d-47c6-8373-6be627bf2876/sv-benchmarks/c/product-lines/email_spec7_product27.cil.c[14691,14704] [2021-11-07 02:02:54,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:54,049 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:02:54,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:02:54,088 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_8b235e70-c77d-47c6-8373-6be627bf2876/sv-benchmarks/c/product-lines/email_spec7_product27.cil.c[14691,14704] [2021-11-07 02:02:54,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:54,185 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:02:54,227 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_8b235e70-c77d-47c6-8373-6be627bf2876/sv-benchmarks/c/product-lines/email_spec7_product27.cil.c[14691,14704] [2021-11-07 02:02:54,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:02:54,385 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:02:54,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54 WrapperNode [2021-11-07 02:02:54,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:02:54,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:54,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:02:54,388 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:02:54,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:02:54,642 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:02:54,642 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:02:54,643 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:02:54,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,723 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,814 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,826 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:02:54,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:02:54,862 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:02:54,862 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:02:54,863 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (1/1) ... [2021-11-07 02:02:54,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:02:54,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:02:54,905 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:02:54,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:02:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:02:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:02:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:02:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:02:54,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:03:00,964 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:03:00,964 INFO L299 CfgBuilder]: Removed 685 assume(true) statements. [2021-11-07 02:03:00,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:03:00 BoogieIcfgContainer [2021-11-07 02:03:00,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:03:00,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:03:00,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:03:00,978 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:03:00,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:02:53" (1/3) ... [2021-11-07 02:03:00,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ebc566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:03:00, skipping insertion in model container [2021-11-07 02:03:00,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:02:54" (2/3) ... [2021-11-07 02:03:00,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14ebc566 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:03:00, skipping insertion in model container [2021-11-07 02:03:00,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:03:00" (3/3) ... [2021-11-07 02:03:00,982 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec7_product27.cil.c [2021-11-07 02:03:00,989 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:03:00,990 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:03:01,059 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:03:01,067 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 02:03:01,067 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:03:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand has 946 states, 939 states have (on average 1.7220447284345048) internal successors, (1617), 945 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-07 02:03:01,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:01,156 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:01,157 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2111563848, now seen corresponding path program 1 times [2021-11-07 02:03:01,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:01,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321102296] [2021-11-07 02:03:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:01,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:01,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:01,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:01,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:03:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:01,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:03:01,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:01,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:01,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:02,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:02,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321102296] [2021-11-07 02:03:02,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321102296] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:02,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:02,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:03:02,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50015750] [2021-11-07 02:03:02,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:03:02,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:02,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:03:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:03:02,116 INFO L87 Difference]: Start difference. First operand has 946 states, 939 states have (on average 1.7220447284345048) internal successors, (1617), 945 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:02,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:02,272 INFO L93 Difference]: Finished difference Result 1603 states and 2704 transitions. [2021-11-07 02:03:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:03:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-07 02:03:02,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:02,303 INFO L225 Difference]: With dead ends: 1603 [2021-11-07 02:03:02,303 INFO L226 Difference]: Without dead ends: 792 [2021-11-07 02:03:02,315 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:03:02,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2021-11-07 02:03:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 792. [2021-11-07 02:03:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 786 states have (on average 1.72264631043257) internal successors, (1354), 791 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:02,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1354 transitions. [2021-11-07 02:03:02,442 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1354 transitions. Word has length 41 [2021-11-07 02:03:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:02,443 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 1354 transitions. [2021-11-07 02:03:02,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:02,443 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1354 transitions. [2021-11-07 02:03:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 02:03:02,452 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:02,453 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:02,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 02:03:02,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:02,667 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:02,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:02,668 INFO L85 PathProgramCache]: Analyzing trace with hash 620684205, now seen corresponding path program 1 times [2021-11-07 02:03:02,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:02,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951591194] [2021-11-07 02:03:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:02,670 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:02,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:02,674 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:02,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:03:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:03:03,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:03,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:03,467 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:03,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951591194] [2021-11-07 02:03:03,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951591194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:03,469 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:03,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:03:03,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005978320] [2021-11-07 02:03:03,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:03,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:03,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:03,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:03,477 INFO L87 Difference]: Start difference. First operand 792 states and 1354 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:03,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:03,640 INFO L93 Difference]: Finished difference Result 2346 states and 4014 transitions. [2021-11-07 02:03:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:03,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-07 02:03:03,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:03,652 INFO L225 Difference]: With dead ends: 2346 [2021-11-07 02:03:03,652 INFO L226 Difference]: Without dead ends: 1569 [2021-11-07 02:03:03,655 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:03,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1569 states. [2021-11-07 02:03:03,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1569 to 791. [2021-11-07 02:03:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 785 states have (on average 1.718471337579618) internal successors, (1349), 790 states have internal predecessors, (1349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1349 transitions. [2021-11-07 02:03:03,708 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1349 transitions. Word has length 42 [2021-11-07 02:03:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:03,709 INFO L470 AbstractCegarLoop]: Abstraction has 791 states and 1349 transitions. [2021-11-07 02:03:03,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1349 transitions. [2021-11-07 02:03:03,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 02:03:03,721 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:03,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:03,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 02:03:03,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:03,941 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:03,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 825009927, now seen corresponding path program 1 times [2021-11-07 02:03:03,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:03,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1547569902] [2021-11-07 02:03:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:03,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:03,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:03,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:03,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:03:04,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:03:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:04,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:04,761 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:04,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1547569902] [2021-11-07 02:03:04,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1547569902] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:04,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:04,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:04,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991009334] [2021-11-07 02:03:04,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:04,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:04,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:04,764 INFO L87 Difference]: Start difference. First operand 791 states and 1349 transitions. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:05,158 INFO L93 Difference]: Finished difference Result 3081 states and 5258 transitions. [2021-11-07 02:03:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:03:05,159 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 02:03:05,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:05,176 INFO L225 Difference]: With dead ends: 3081 [2021-11-07 02:03:05,177 INFO L226 Difference]: Without dead ends: 2308 [2021-11-07 02:03:05,179 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:03:05,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2021-11-07 02:03:05,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 790. [2021-11-07 02:03:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 784 states have (on average 1.715561224489796) internal successors, (1345), 789 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:05,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1345 transitions. [2021-11-07 02:03:05,304 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1345 transitions. Word has length 44 [2021-11-07 02:03:05,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:05,305 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 1345 transitions. [2021-11-07 02:03:05,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:05,306 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1345 transitions. [2021-11-07 02:03:05,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 02:03:05,309 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:05,309 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:05,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:05,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:05,525 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1718977236, now seen corresponding path program 1 times [2021-11-07 02:03:05,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:05,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1105366525] [2021-11-07 02:03:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:05,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:05,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:05,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:03:05,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:05,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:03:05,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:06,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:06,283 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:06,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1105366525] [2021-11-07 02:03:06,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1105366525] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:06,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:06,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:03:06,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324447730] [2021-11-07 02:03:06,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:06,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:06,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:06,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:06,288 INFO L87 Difference]: Start difference. First operand 790 states and 1345 transitions. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:06,405 INFO L93 Difference]: Finished difference Result 1577 states and 2687 transitions. [2021-11-07 02:03:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:06,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 02:03:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:06,411 INFO L225 Difference]: With dead ends: 1577 [2021-11-07 02:03:06,411 INFO L226 Difference]: Without dead ends: 795 [2021-11-07 02:03:06,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-11-07 02:03:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 790. [2021-11-07 02:03:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 784 states have (on average 1.711734693877551) internal successors, (1342), 789 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1342 transitions. [2021-11-07 02:03:06,476 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1342 transitions. Word has length 45 [2021-11-07 02:03:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:06,477 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 1342 transitions. [2021-11-07 02:03:06,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1342 transitions. [2021-11-07 02:03:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 02:03:06,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:06,479 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:06,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:06,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:06,694 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash -215604961, now seen corresponding path program 1 times [2021-11-07 02:03:06,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:06,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435309082] [2021-11-07 02:03:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:06,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:06,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:06,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:06,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:03:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:03:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:07,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:07,491 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:07,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435309082] [2021-11-07 02:03:07,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435309082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:07,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:07,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:07,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532363096] [2021-11-07 02:03:07,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:07,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:07,494 INFO L87 Difference]: Start difference. First operand 790 states and 1342 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:07,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:07,923 INFO L93 Difference]: Finished difference Result 3068 states and 5234 transitions. [2021-11-07 02:03:07,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:03:07,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-07 02:03:07,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:07,939 INFO L225 Difference]: With dead ends: 3068 [2021-11-07 02:03:07,939 INFO L226 Difference]: Without dead ends: 2304 [2021-11-07 02:03:07,941 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 02:03:07,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-11-07 02:03:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 790. [2021-11-07 02:03:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 784 states have (on average 1.7079081632653061) internal successors, (1339), 789 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1339 transitions. [2021-11-07 02:03:08,035 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1339 transitions. Word has length 46 [2021-11-07 02:03:08,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:08,037 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 1339 transitions. [2021-11-07 02:03:08,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1339 transitions. [2021-11-07 02:03:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 02:03:08,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:08,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:08,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:08,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:08,255 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:08,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:08,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1680893060, now seen corresponding path program 1 times [2021-11-07 02:03:08,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:08,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2009233791] [2021-11-07 02:03:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:08,257 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:08,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:08,260 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:08,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:03:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:08,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:08,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:09,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:09,023 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:09,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2009233791] [2021-11-07 02:03:09,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2009233791] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:09,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:09,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:03:09,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114352391] [2021-11-07 02:03:09,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:09,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:09,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:09,025 INFO L87 Difference]: Start difference. First operand 790 states and 1339 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:09,209 INFO L93 Difference]: Finished difference Result 2057 states and 3475 transitions. [2021-11-07 02:03:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:03:09,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 02:03:09,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:09,219 INFO L225 Difference]: With dead ends: 2057 [2021-11-07 02:03:09,220 INFO L226 Difference]: Without dead ends: 1554 [2021-11-07 02:03:09,224 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:09,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-11-07 02:03:09,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1051. [2021-11-07 02:03:09,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1051 states, 1045 states have (on average 1.7406698564593301) internal successors, (1819), 1050 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:09,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1051 states to 1051 states and 1819 transitions. [2021-11-07 02:03:09,348 INFO L78 Accepts]: Start accepts. Automaton has 1051 states and 1819 transitions. Word has length 48 [2021-11-07 02:03:09,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:09,348 INFO L470 AbstractCegarLoop]: Abstraction has 1051 states and 1819 transitions. [2021-11-07 02:03:09,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:09,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1051 states and 1819 transitions. [2021-11-07 02:03:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:03:09,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:09,351 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:09,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:09,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:09,571 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:09,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1253014387, now seen corresponding path program 1 times [2021-11-07 02:03:09,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:09,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652578975] [2021-11-07 02:03:09,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:09,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:09,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:09,574 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:09,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:03:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:10,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:10,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:10,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:10,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652578975] [2021-11-07 02:03:10,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652578975] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:10,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:10,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:10,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361456113] [2021-11-07 02:03:10,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:10,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:10,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:10,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:10,328 INFO L87 Difference]: Start difference. First operand 1051 states and 1819 transitions. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:10,482 INFO L93 Difference]: Finished difference Result 2730 states and 4716 transitions. [2021-11-07 02:03:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:03:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:10,494 INFO L225 Difference]: With dead ends: 2730 [2021-11-07 02:03:10,494 INFO L226 Difference]: Without dead ends: 1763 [2021-11-07 02:03:10,497 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2021-11-07 02:03:10,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 1260. [2021-11-07 02:03:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1254 states have (on average 1.755980861244019) internal successors, (2202), 1259 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2202 transitions. [2021-11-07 02:03:10,639 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2202 transitions. Word has length 60 [2021-11-07 02:03:10,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:10,639 INFO L470 AbstractCegarLoop]: Abstraction has 1260 states and 2202 transitions. [2021-11-07 02:03:10,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:10,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2202 transitions. [2021-11-07 02:03:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 02:03:10,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:10,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:10,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:10,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:10,859 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2073625588, now seen corresponding path program 1 times [2021-11-07 02:03:10,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:10,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2105271357] [2021-11-07 02:03:10,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:10,861 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:10,862 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:10,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:03:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:11,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:11,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:11,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:11,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2105271357] [2021-11-07 02:03:11,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2105271357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:11,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:11,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:11,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513761921] [2021-11-07 02:03:11,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:11,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:11,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:11,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:11,675 INFO L87 Difference]: Start difference. First operand 1260 states and 2202 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:11,906 INFO L93 Difference]: Finished difference Result 3389 states and 5930 transitions. [2021-11-07 02:03:11,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 02:03:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:11,923 INFO L225 Difference]: With dead ends: 3389 [2021-11-07 02:03:11,923 INFO L226 Difference]: Without dead ends: 2221 [2021-11-07 02:03:11,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:11,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2221 states. [2021-11-07 02:03:12,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2221 to 1718. [2021-11-07 02:03:12,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1718 states, 1712 states have (on average 1.77803738317757) internal successors, (3044), 1717 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 3044 transitions. [2021-11-07 02:03:12,098 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 3044 transitions. Word has length 61 [2021-11-07 02:03:12,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:12,099 INFO L470 AbstractCegarLoop]: Abstraction has 1718 states and 3044 transitions. [2021-11-07 02:03:12,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:12,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 3044 transitions. [2021-11-07 02:03:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 02:03:12,102 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:12,103 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:12,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:12,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:12,323 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:12,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1996221957, now seen corresponding path program 1 times [2021-11-07 02:03:12,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:12,324 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1321909436] [2021-11-07 02:03:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:12,325 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:12,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:12,326 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:12,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:03:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:12,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:12,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:13,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:13,250 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:13,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1321909436] [2021-11-07 02:03:13,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1321909436] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:13,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:13,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:13,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094573662] [2021-11-07 02:03:13,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:13,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:13,252 INFO L87 Difference]: Start difference. First operand 1718 states and 3044 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:13,496 INFO L93 Difference]: Finished difference Result 4743 states and 8425 transitions. [2021-11-07 02:03:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:13,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 02:03:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:13,518 INFO L225 Difference]: With dead ends: 4743 [2021-11-07 02:03:13,518 INFO L226 Difference]: Without dead ends: 3125 [2021-11-07 02:03:13,521 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3125 states. [2021-11-07 02:03:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3125 to 2622. [2021-11-07 02:03:13,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2622 states, 2616 states have (on average 1.7993119266055047) internal successors, (4707), 2621 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2622 states to 2622 states and 4707 transitions. [2021-11-07 02:03:13,748 INFO L78 Accepts]: Start accepts. Automaton has 2622 states and 4707 transitions. Word has length 62 [2021-11-07 02:03:13,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:13,749 INFO L470 AbstractCegarLoop]: Abstraction has 2622 states and 4707 transitions. [2021-11-07 02:03:13,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:13,749 INFO L276 IsEmpty]: Start isEmpty. Operand 2622 states and 4707 transitions. [2021-11-07 02:03:13,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 02:03:13,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:13,754 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:13,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:13,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:13,972 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:13,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:13,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1471250299, now seen corresponding path program 1 times [2021-11-07 02:03:13,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:13,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1071424372] [2021-11-07 02:03:13,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:13,974 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:13,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:13,975 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:13,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:03:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:14,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:14,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:14,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:14,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:14,840 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:14,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1071424372] [2021-11-07 02:03:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1071424372] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:14,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:14,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:14,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67766139] [2021-11-07 02:03:14,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:14,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:14,843 INFO L87 Difference]: Start difference. First operand 2622 states and 4707 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:15,157 INFO L93 Difference]: Finished difference Result 7191 states and 12933 transitions. [2021-11-07 02:03:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 02:03:15,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:15,187 INFO L225 Difference]: With dead ends: 7191 [2021-11-07 02:03:15,187 INFO L226 Difference]: Without dead ends: 4703 [2021-11-07 02:03:15,190 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:15,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4703 states. [2021-11-07 02:03:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4703 to 4200. [2021-11-07 02:03:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4200 states, 4194 states have (on average 1.8140200286123034) internal successors, (7608), 4199 states have internal predecessors, (7608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4200 states to 4200 states and 7608 transitions. [2021-11-07 02:03:15,508 INFO L78 Accepts]: Start accepts. Automaton has 4200 states and 7608 transitions. Word has length 63 [2021-11-07 02:03:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:15,509 INFO L470 AbstractCegarLoop]: Abstraction has 4200 states and 7608 transitions. [2021-11-07 02:03:15,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:15,509 INFO L276 IsEmpty]: Start isEmpty. Operand 4200 states and 7608 transitions. [2021-11-07 02:03:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 02:03:15,514 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:15,515 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:15,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:15,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:15,731 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:15,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:15,731 INFO L85 PathProgramCache]: Analyzing trace with hash -1900252812, now seen corresponding path program 1 times [2021-11-07 02:03:15,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:15,732 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786876801] [2021-11-07 02:03:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:15,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:15,733 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:15,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:03:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:16,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:16,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:16,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:16,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:16,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786876801] [2021-11-07 02:03:16,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786876801] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:16,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:16,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:16,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597194927] [2021-11-07 02:03:16,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:16,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:16,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:16,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:16,695 INFO L87 Difference]: Start difference. First operand 4200 states and 7608 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:17,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:17,190 INFO L93 Difference]: Finished difference Result 11641 states and 21119 transitions. [2021-11-07 02:03:17,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:17,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-07 02:03:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:17,242 INFO L225 Difference]: With dead ends: 11641 [2021-11-07 02:03:17,242 INFO L226 Difference]: Without dead ends: 7609 [2021-11-07 02:03:17,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:17,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2021-11-07 02:03:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 7106. [2021-11-07 02:03:17,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7106 states, 7100 states have (on average 1.8232394366197182) internal successors, (12945), 7105 states have internal predecessors, (12945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7106 states to 7106 states and 12945 transitions. [2021-11-07 02:03:17,809 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 12945 transitions. Word has length 64 [2021-11-07 02:03:17,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:17,811 INFO L470 AbstractCegarLoop]: Abstraction has 7106 states and 12945 transitions. [2021-11-07 02:03:17,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:17,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 12945 transitions. [2021-11-07 02:03:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:03:17,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:17,826 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:17,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:18,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:18,052 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:18,053 INFO L85 PathProgramCache]: Analyzing trace with hash 2113229076, now seen corresponding path program 1 times [2021-11-07 02:03:18,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:18,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437288123] [2021-11-07 02:03:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:18,054 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:18,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:18,055 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:18,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:03:18,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:18,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:18,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:18,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:18,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:18,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437288123] [2021-11-07 02:03:18,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437288123] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:18,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:18,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:18,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785574572] [2021-11-07 02:03:18,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:18,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:18,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:18,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:18,894 INFO L87 Difference]: Start difference. First operand 7106 states and 12945 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:19,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:19,717 INFO L93 Difference]: Finished difference Result 20685 states and 37741 transitions. [2021-11-07 02:03:19,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:19,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 02:03:19,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:19,767 INFO L225 Difference]: With dead ends: 20685 [2021-11-07 02:03:19,767 INFO L226 Difference]: Without dead ends: 13755 [2021-11-07 02:03:19,780 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:19,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13755 states. [2021-11-07 02:03:20,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13755 to 13252. [2021-11-07 02:03:20,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13252 states, 13246 states have (on average 1.8289294881473652) internal successors, (24226), 13251 states have internal predecessors, (24226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:20,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 24226 transitions. [2021-11-07 02:03:20,757 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 24226 transitions. Word has length 65 [2021-11-07 02:03:20,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:20,757 INFO L470 AbstractCegarLoop]: Abstraction has 13252 states and 24226 transitions. [2021-11-07 02:03:20,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:20,757 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 24226 transitions. [2021-11-07 02:03:20,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:03:20,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:20,764 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:20,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:20,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:20,983 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:20,984 INFO L85 PathProgramCache]: Analyzing trace with hash 490947044, now seen corresponding path program 1 times [2021-11-07 02:03:20,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:20,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1001512230] [2021-11-07 02:03:20,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:20,985 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:20,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:20,986 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:20,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:03:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:21,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:21,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:21,763 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:03:21,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 02:03:21,987 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:21,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1001512230] [2021-11-07 02:03:21,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1001512230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:21,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:21,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:21,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350149847] [2021-11-07 02:03:21,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:21,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:21,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:21,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:21,990 INFO L87 Difference]: Start difference. First operand 13252 states and 24226 transitions. Second operand has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:25,625 INFO L93 Difference]: Finished difference Result 32853 states and 60043 transitions. [2021-11-07 02:03:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:03:25,626 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:03:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:25,694 INFO L225 Difference]: With dead ends: 32853 [2021-11-07 02:03:25,694 INFO L226 Difference]: Without dead ends: 19898 [2021-11-07 02:03:25,711 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:03:25,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19898 states. [2021-11-07 02:03:26,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19898 to 13219. [2021-11-07 02:03:26,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13219 states, 13213 states have (on average 1.8235071520472261) internal successors, (24094), 13218 states have internal predecessors, (24094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:26,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 24094 transitions. [2021-11-07 02:03:26,673 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 24094 transitions. Word has length 66 [2021-11-07 02:03:26,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:26,673 INFO L470 AbstractCegarLoop]: Abstraction has 13219 states and 24094 transitions. [2021-11-07 02:03:26,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.666666666666666) internal successors, (88), 6 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:26,673 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 24094 transitions. [2021-11-07 02:03:26,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:03:26,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:26,680 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:26,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:26,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:26,894 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:26,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:26,895 INFO L85 PathProgramCache]: Analyzing trace with hash 734470373, now seen corresponding path program 1 times [2021-11-07 02:03:26,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:26,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741917762] [2021-11-07 02:03:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:26,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:26,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:26,896 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:26,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:03:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:27,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:27,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:27,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:27,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:27,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:27,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741917762] [2021-11-07 02:03:27,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741917762] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:27,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:27,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:27,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448423734] [2021-11-07 02:03:27,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:27,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:27,868 INFO L87 Difference]: Start difference. First operand 13219 states and 24094 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:29,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:29,030 INFO L93 Difference]: Finished difference Result 38856 states and 70895 transitions. [2021-11-07 02:03:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:29,030 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:03:29,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:29,140 INFO L225 Difference]: With dead ends: 38856 [2021-11-07 02:03:29,140 INFO L226 Difference]: Without dead ends: 25820 [2021-11-07 02:03:29,163 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:29,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25820 states. [2021-11-07 02:03:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25820 to 25317. [2021-11-07 02:03:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25317 states, 25311 states have (on average 1.825569910315673) internal successors, (46207), 25316 states have internal predecessors, (46207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:30,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25317 states to 25317 states and 46207 transitions. [2021-11-07 02:03:30,968 INFO L78 Accepts]: Start accepts. Automaton has 25317 states and 46207 transitions. Word has length 66 [2021-11-07 02:03:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:30,968 INFO L470 AbstractCegarLoop]: Abstraction has 25317 states and 46207 transitions. [2021-11-07 02:03:30,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 25317 states and 46207 transitions. [2021-11-07 02:03:30,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:03:30,977 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:30,977 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:31,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:31,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:31,196 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:31,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:31,197 INFO L85 PathProgramCache]: Analyzing trace with hash 2103469605, now seen corresponding path program 1 times [2021-11-07 02:03:31,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:31,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085723726] [2021-11-07 02:03:31,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:31,198 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:31,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:31,199 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:31,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:03:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:31,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:31,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:32,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:32,222 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:32,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085723726] [2021-11-07 02:03:32,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085723726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:32,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:32,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:32,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123525503] [2021-11-07 02:03:32,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:32,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:32,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:32,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:32,225 INFO L87 Difference]: Start difference. First operand 25317 states and 46207 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:34,109 INFO L93 Difference]: Finished difference Result 69789 states and 126970 transitions. [2021-11-07 02:03:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:03:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:34,243 INFO L225 Difference]: With dead ends: 69789 [2021-11-07 02:03:34,243 INFO L226 Difference]: Without dead ends: 44702 [2021-11-07 02:03:34,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:34,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44702 states. [2021-11-07 02:03:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44702 to 44199. [2021-11-07 02:03:36,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44199 states, 44193 states have (on average 1.8145860204104722) internal successors, (80192), 44198 states have internal predecessors, (80192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44199 states to 44199 states and 80192 transitions. [2021-11-07 02:03:36,768 INFO L78 Accepts]: Start accepts. Automaton has 44199 states and 80192 transitions. Word has length 67 [2021-11-07 02:03:36,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:36,769 INFO L470 AbstractCegarLoop]: Abstraction has 44199 states and 80192 transitions. [2021-11-07 02:03:36,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:36,769 INFO L276 IsEmpty]: Start isEmpty. Operand 44199 states and 80192 transitions. [2021-11-07 02:03:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:03:36,777 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:36,777 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:36,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:03:36,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:36,992 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:36,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:36,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1429557538, now seen corresponding path program 1 times [2021-11-07 02:03:36,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:36,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1052916186] [2021-11-07 02:03:36,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:36,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:36,996 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:36,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:03:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:37,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:03:37,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:37,851 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:03:37,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 02:03:38,083 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:38,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1052916186] [2021-11-07 02:03:38,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1052916186] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:38,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:38,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:03:38,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071263412] [2021-11-07 02:03:38,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:03:38,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:03:38,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:03:38,085 INFO L87 Difference]: Start difference. First operand 44199 states and 80192 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:46,033 INFO L93 Difference]: Finished difference Result 172064 states and 312069 transitions. [2021-11-07 02:03:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:03:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:03:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:46,446 INFO L225 Difference]: With dead ends: 172064 [2021-11-07 02:03:46,446 INFO L226 Difference]: Without dead ends: 128161 [2021-11-07 02:03:46,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:03:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128161 states. [2021-11-07 02:03:49,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128161 to 43941. [2021-11-07 02:03:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43941 states, 43935 states have (on average 1.8017525890520087) internal successors, (79160), 43940 states have internal predecessors, (79160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43941 states to 43941 states and 79160 transitions. [2021-11-07 02:03:50,124 INFO L78 Accepts]: Start accepts. Automaton has 43941 states and 79160 transitions. Word has length 68 [2021-11-07 02:03:50,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:50,125 INFO L470 AbstractCegarLoop]: Abstraction has 43941 states and 79160 transitions. [2021-11-07 02:03:50,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:50,125 INFO L276 IsEmpty]: Start isEmpty. Operand 43941 states and 79160 transitions. [2021-11-07 02:03:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:03:50,132 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:50,133 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:50,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:03:50,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:50,350 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:50,351 INFO L85 PathProgramCache]: Analyzing trace with hash -195473664, now seen corresponding path program 1 times [2021-11-07 02:03:50,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:50,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [313004395] [2021-11-07 02:03:50,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:50,351 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:50,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:50,352 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:50,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:03:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:51,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:51,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:51,512 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:51,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:51,681 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:51,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [313004395] [2021-11-07 02:03:51,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [313004395] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:51,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:51,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:03:51,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446226673] [2021-11-07 02:03:51,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:03:51,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:03:51,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:51,683 INFO L87 Difference]: Start difference. First operand 43941 states and 79160 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:53,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:03:53,820 INFO L93 Difference]: Finished difference Result 88083 states and 158638 transitions. [2021-11-07 02:03:53,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:03:53,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:03:53,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:03:53,891 INFO L225 Difference]: With dead ends: 88083 [2021-11-07 02:03:53,891 INFO L226 Difference]: Without dead ends: 44444 [2021-11-07 02:03:53,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:03:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44444 states. [2021-11-07 02:03:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44444 to 43941. [2021-11-07 02:03:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43941 states, 43935 states have (on average 1.798839194264254) internal successors, (79032), 43940 states have internal predecessors, (79032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43941 states to 43941 states and 79032 transitions. [2021-11-07 02:03:56,444 INFO L78 Accepts]: Start accepts. Automaton has 43941 states and 79032 transitions. Word has length 68 [2021-11-07 02:03:56,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:03:56,444 INFO L470 AbstractCegarLoop]: Abstraction has 43941 states and 79032 transitions. [2021-11-07 02:03:56,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:03:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 43941 states and 79032 transitions. [2021-11-07 02:03:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:03:56,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:03:56,453 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:03:56,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 02:03:56,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:03:56,664 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 02:03:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:03:56,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1098388275, now seen corresponding path program 1 times [2021-11-07 02:03:56,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:03:56,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [684640222] [2021-11-07 02:03:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:03:56,665 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:03:56,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:03:56,666 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:03:56,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8b235e70-c77d-47c6-8373-6be627bf2876/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:03:57,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:03:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:03:57,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:03:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:57,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:03:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:03:57,887 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:03:57,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [684640222] [2021-11-07 02:03:57,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [684640222] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:03:57,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:03:57,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:03:57,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047987671] [2021-11-07 02:03:57,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:03:57,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:03:57,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:03:57,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:03:57,890 INFO L87 Difference]: Start difference. First operand 43941 states and 79032 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:04:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:04:02,006 INFO L93 Difference]: Finished difference Result 123325 states and 221560 transitions. [2021-11-07 02:04:02,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:04:02,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:04:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:04:02,343 INFO L225 Difference]: With dead ends: 123325 [2021-11-07 02:04:02,343 INFO L226 Difference]: Without dead ends: 79646 [2021-11-07 02:04:02,376 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:04:02,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79646 states.