./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec11_product35.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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/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 97d4c6be733483d74e70aacf7c001bc7f4ca03733e33a8c0b4370e9380a7e003 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:16:31,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:16:31,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:16:31,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:16:31,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:16:31,388 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:16:31,391 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:16:31,396 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:16:31,399 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:16:31,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:16:31,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:16:31,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:16:31,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:16:31,417 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:16:31,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:16:31,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:16:31,430 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:16:31,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:16:31,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:16:31,444 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:16:31,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:16:31,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:16:31,454 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:16:31,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:16:31,467 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:16:31,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:16:31,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:16:31,471 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:16:31,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:16:31,473 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:16:31,474 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:16:31,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:16:31,478 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:16:31,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:16:31,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:16:31,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:16:31,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:16:31,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:16:31,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:16:31,485 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:16:31,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:16:31,487 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 02:16:31,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:16:31,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:16:31,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:16:31,547 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:16:31,547 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:16:31,547 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:16:31,548 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:16:31,548 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:16:31,548 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:16:31,548 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:16:31,557 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:16:31,558 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:16:31,558 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:16:31,559 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:16:31,559 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:16:31,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:16:31,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:16:31,560 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:16:31,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:16:31,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:16:31,561 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:16:31,561 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:16:31,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:16:31,562 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:16:31,562 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:16:31,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:16:31,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:16:31,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:16:31,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:16:31,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:16:31,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:31,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:16:31,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:16:31,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:16:31,567 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:16:31,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:16:31,568 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:16:31,568 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:16:31,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:16:31,569 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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97d4c6be733483d74e70aacf7c001bc7f4ca03733e33a8c0b4370e9380a7e003 [2021-11-07 02:16:31,982 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:16:32,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:16:32,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:16:32,027 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:16:32,030 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:16:32,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product35.cil.c [2021-11-07 02:16:32,110 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data/39ce6280a/e59b84e5856a4a5282f3931d2b8ddb11/FLAGaeea6f7ca [2021-11-07 02:16:32,898 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:16:32,899 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/sv-benchmarks/c/product-lines/email_spec11_product35.cil.c [2021-11-07 02:16:32,942 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data/39ce6280a/e59b84e5856a4a5282f3931d2b8ddb11/FLAGaeea6f7ca [2021-11-07 02:16:33,040 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data/39ce6280a/e59b84e5856a4a5282f3931d2b8ddb11 [2021-11-07 02:16:33,044 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:16:33,048 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:16:33,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:33,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:16:33,058 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:16:33,059 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:33" (1/1) ... [2021-11-07 02:16:33,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a78ea34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:33, skipping insertion in model container [2021-11-07 02:16:33,061 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:33" (1/1) ... [2021-11-07 02:16:33,070 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:16:33,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:33,879 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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/sv-benchmarks/c/product-lines/email_spec11_product35.cil.c[61136,61149] [2021-11-07 02:16:33,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:33,926 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 02:16:33,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@607294e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:33, skipping insertion in model container [2021-11-07 02:16:33,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:33,927 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:16:33,930 INFO L168 Benchmark]: Toolchain (without parser) took 880.59 ms. Allocated memory is still 111.1 MB. Free memory was 65.4 MB in the beginning and 72.1 MB in the end (delta: -6.7 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:16:33,931 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 111.1 MB. Free memory is still 85.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:16:33,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 875.18 ms. Allocated memory is still 111.1 MB. Free memory was 65.3 MB in the beginning and 72.1 MB in the end (delta: -6.8 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-11-07 02:16:33,934 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 111.1 MB. Free memory is still 85.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 875.18 ms. Allocated memory is still 111.1 MB. Free memory was 65.3 MB in the beginning and 72.1 MB in the end (delta: -6.8 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1602]: 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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec11_product35.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/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 97d4c6be733483d74e70aacf7c001bc7f4ca03733e33a8c0b4370e9380a7e003 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:16:36,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:16:36,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:16:36,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:16:37,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:16:37,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:16:37,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:16:37,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:16:37,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:16:37,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:16:37,020 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:16:37,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:16:37,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:16:37,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:16:37,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:16:37,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:16:37,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:16:37,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:16:37,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:16:37,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:16:37,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:16:37,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:16:37,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:16:37,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:16:37,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:16:37,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:16:37,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:16:37,054 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:16:37,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:16:37,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:16:37,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:16:37,081 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:16:37,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:16:37,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:16:37,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:16:37,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:16:37,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:16:37,092 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:16:37,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:16:37,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:16:37,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:16:37,102 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 02:16:37,158 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:16:37,159 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:16:37,161 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:16:37,161 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:16:37,161 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:16:37,162 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:16:37,162 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:16:37,162 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:16:37,163 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:16:37,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:16:37,166 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:16:37,166 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:16:37,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:16:37,167 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 02:16:37,167 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:16:37,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 02:16:37,168 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:16:37,168 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:16:37,169 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:16:37,169 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:16:37,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 02:16:37,170 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:16:37,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 02:16:37,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:16:37,171 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:16:37,171 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:16:37,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:37,172 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:16:37,172 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:16:37,172 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 02:16:37,172 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:16:37,173 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:16:37,173 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 02:16:37,173 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:16:37,174 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:16:37,174 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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97d4c6be733483d74e70aacf7c001bc7f4ca03733e33a8c0b4370e9380a7e003 [2021-11-07 02:16:37,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:16:37,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:16:37,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:16:37,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:16:37,721 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:16:37,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec11_product35.cil.c [2021-11-07 02:16:37,809 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data/a104c454d/43e80836b1ff42eaa25d732d575862f8/FLAGb91cdaef1 [2021-11-07 02:16:38,751 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:16:38,753 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/sv-benchmarks/c/product-lines/email_spec11_product35.cil.c [2021-11-07 02:16:38,792 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data/a104c454d/43e80836b1ff42eaa25d732d575862f8/FLAGb91cdaef1 [2021-11-07 02:16:38,861 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/data/a104c454d/43e80836b1ff42eaa25d732d575862f8 [2021-11-07 02:16:38,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:16:38,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:16:38,875 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:38,875 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:16:38,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:16:38,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:38" (1/1) ... [2021-11-07 02:16:38,882 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@659bd6bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:38, skipping insertion in model container [2021-11-07 02:16:38,882 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:16:38" (1/1) ... [2021-11-07 02:16:38,891 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:16:38,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:39,755 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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/sv-benchmarks/c/product-lines/email_spec11_product35.cil.c[61136,61149] [2021-11-07 02:16:39,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:39,839 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:16:39,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:16:40,119 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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/sv-benchmarks/c/product-lines/email_spec11_product35.cil.c[61136,61149] [2021-11-07 02:16:40,144 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:40,159 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:16:40,313 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_3ef69bbc-8b33-49fe-b713-dc03230e94d6/sv-benchmarks/c/product-lines/email_spec11_product35.cil.c[61136,61149] [2021-11-07 02:16:40,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:16:40,415 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:16:40,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40 WrapperNode [2021-11-07 02:16:40,416 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:16:40,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:16:40,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:16:40,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:16:40,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:40,484 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:40,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:16:40,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:16:40,761 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:16:40,762 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:16:40,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:40,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:40,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:40,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:40,989 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:41,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:41,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:41,087 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:16:41,088 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:16:41,088 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:16:41,089 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:16:41,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (1/1) ... [2021-11-07 02:16:41,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:16:41,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:16:41,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:16:41,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:16:41,185 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 02:16:41,185 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:16:41,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:16:41,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:16:41,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:16:49,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:16:49,181 INFO L299 CfgBuilder]: Removed 937 assume(true) statements. [2021-11-07 02:16:49,186 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:16:49 BoogieIcfgContainer [2021-11-07 02:16:49,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:16:49,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:16:49,190 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:16:49,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:16:49,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:16:38" (1/3) ... [2021-11-07 02:16:49,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494d4268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:16:49, skipping insertion in model container [2021-11-07 02:16:49,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:16:40" (2/3) ... [2021-11-07 02:16:49,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@494d4268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:16:49, skipping insertion in model container [2021-11-07 02:16:49,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:16:49" (3/3) ... [2021-11-07 02:16:49,197 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec11_product35.cil.c [2021-11-07 02:16:49,204 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:16:49,205 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 02:16:49,275 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:16:49,283 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 02:16:49,283 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 02:16:49,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 1330 states, 1323 states have (on average 1.7165532879818595) internal successors, (2271), 1329 states have internal predecessors, (2271), 0 states have call successors, (0), 0 states 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 02:16:49,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 02:16:49,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:49,364 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 02:16:49,365 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 02:16:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:49,373 INFO L85 PathProgramCache]: Analyzing trace with hash 859785730, now seen corresponding path program 1 times [2021-11-07 02:16:49,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:49,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [422631942] [2021-11-07 02:16:49,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:49,394 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:49,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:49,398 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:49,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:16:49,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:49,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 02:16:49,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:50,367 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 02:16:50,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:50,609 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 02:16:50,610 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:50,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [422631942] [2021-11-07 02:16:50,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [422631942] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:50,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:50,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:16:50,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703563888] [2021-11-07 02:16:50,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 02:16:50,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:50,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 02:16:50,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 02:16:50,652 INFO L87 Difference]: Start difference. First operand has 1330 states, 1323 states have (on average 1.7165532879818595) internal successors, (2271), 1329 states have internal predecessors, (2271), 0 states have call successors, (0), 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 32.5) internal successors, (65), 2 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 02:16:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:50,790 INFO L93 Difference]: Finished difference Result 2371 states and 4012 transitions. [2021-11-07 02:16:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 02:16:50,792 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 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 02:16:50,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:50,821 INFO L225 Difference]: With dead ends: 2371 [2021-11-07 02:16:50,821 INFO L226 Difference]: Without dead ends: 1226 [2021-11-07 02:16:50,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 128 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 02:16:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2021-11-07 02:16:50,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 1226. [2021-11-07 02:16:50,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1220 states have (on average 1.7180327868852459) internal successors, (2096), 1225 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states 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 02:16:50,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 2096 transitions. [2021-11-07 02:16:50,996 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 2096 transitions. Word has length 65 [2021-11-07 02:16:50,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:50,997 INFO L470 AbstractCegarLoop]: Abstraction has 1226 states and 2096 transitions. [2021-11-07 02:16:50,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.5) internal successors, (65), 2 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 02:16:50,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 2096 transitions. [2021-11-07 02:16:51,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:16:51,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:51,012 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 02:16:51,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:51,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:51,226 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 02:16:51,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash 929220343, now seen corresponding path program 1 times [2021-11-07 02:16:51,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:51,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317661326] [2021-11-07 02:16:51,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:51,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:51,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:51,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:51,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:16:51,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:16:51,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:52,081 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 02:16:52,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:52,325 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 02:16:52,327 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:52,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317661326] [2021-11-07 02:16:52,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317661326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:52,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:52,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:52,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764072520] [2021-11-07 02:16:52,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:52,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:52,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:52,338 INFO L87 Difference]: Start difference. First operand 1226 states and 2096 transitions. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 02:16:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:52,571 INFO L93 Difference]: Finished difference Result 3648 states and 6240 transitions. [2021-11-07 02:16:52,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:52,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 66 [2021-11-07 02:16:52,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:52,597 INFO L225 Difference]: With dead ends: 3648 [2021-11-07 02:16:52,597 INFO L226 Difference]: Without dead ends: 2437 [2021-11-07 02:16:52,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 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 02:16:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-11-07 02:16:52,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1225. [2021-11-07 02:16:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1225 states, 1219 states have (on average 1.7153404429860541) internal successors, (2091), 1224 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states 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 02:16:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 2091 transitions. [2021-11-07 02:16:52,687 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 2091 transitions. Word has length 66 [2021-11-07 02:16:52,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:52,689 INFO L470 AbstractCegarLoop]: Abstraction has 1225 states and 2091 transitions. [2021-11-07 02:16:52,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 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 02:16:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 2091 transitions. [2021-11-07 02:16:52,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 02:16:52,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:52,700 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 02:16:52,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:52,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:52,917 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 02:16:52,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:52,918 INFO L85 PathProgramCache]: Analyzing trace with hash 271752273, now seen corresponding path program 1 times [2021-11-07 02:16:52,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:52,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704316772] [2021-11-07 02:16:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:52,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:52,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:52,921 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:52,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:16:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:53,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:16:53,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:53,755 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 02:16:53,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:53,996 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 02:16:53,996 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:53,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704316772] [2021-11-07 02:16:53,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704316772] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:53,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:53,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:16:53,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533466665] [2021-11-07 02:16:53,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:53,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:54,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:54,005 INFO L87 Difference]: Start difference. First operand 1225 states and 2091 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:54,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:54,515 INFO L93 Difference]: Finished difference Result 4817 states and 8226 transitions. [2021-11-07 02:16:54,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:16:54,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 02:16:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:54,543 INFO L225 Difference]: With dead ends: 4817 [2021-11-07 02:16:54,543 INFO L226 Difference]: Without dead ends: 3610 [2021-11-07 02:16:54,547 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 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 02:16:54,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-11-07 02:16:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 1224. [2021-11-07 02:16:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1218 states have (on average 1.7134646962233169) internal successors, (2087), 1223 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states 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 02:16:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2087 transitions. [2021-11-07 02:16:54,690 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2087 transitions. Word has length 68 [2021-11-07 02:16:54,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:54,691 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2087 transitions. [2021-11-07 02:16:54,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:54,693 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2087 transitions. [2021-11-07 02:16:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 02:16:54,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:54,698 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:54,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:54,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:54,913 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 02:16:54,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:54,914 INFO L85 PathProgramCache]: Analyzing trace with hash 436740382, now seen corresponding path program 1 times [2021-11-07 02:16:54,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:54,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2119520276] [2021-11-07 02:16:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:54,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:54,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:54,917 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:54,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:16:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:55,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 02:16:55,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:55,712 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 02:16:55,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:55,923 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 02:16:55,923 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:55,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2119520276] [2021-11-07 02:16:55,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2119520276] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:55,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:55,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:55,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926636941] [2021-11-07 02:16:55,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:55,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:55,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:55,927 INFO L87 Difference]: Start difference. First operand 1224 states and 2087 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:56,066 INFO L93 Difference]: Finished difference Result 2445 states and 4171 transitions. [2021-11-07 02:16:56,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:56,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 02:16:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:56,075 INFO L225 Difference]: With dead ends: 2445 [2021-11-07 02:16:56,075 INFO L226 Difference]: Without dead ends: 1229 [2021-11-07 02:16:56,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 134 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 02:16:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2021-11-07 02:16:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1224. [2021-11-07 02:16:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1218 states have (on average 1.7110016420361247) internal successors, (2084), 1223 states have internal predecessors, (2084), 0 states have call successors, (0), 0 states 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 02:16:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2084 transitions. [2021-11-07 02:16:56,195 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2084 transitions. Word has length 69 [2021-11-07 02:16:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:56,195 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2084 transitions. [2021-11-07 02:16:56,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2084 transitions. [2021-11-07 02:16:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 02:16:56,198 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:56,199 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:56,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 02:16:56,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:56,413 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 02:16:56,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:56,413 INFO L85 PathProgramCache]: Analyzing trace with hash 543510121, now seen corresponding path program 1 times [2021-11-07 02:16:56,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:56,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20801230] [2021-11-07 02:16:56,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:56,415 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:56,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:56,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:56,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:16:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:57,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:16:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:57,217 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 02:16:57,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:57,450 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 02:16:57,450 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:57,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20801230] [2021-11-07 02:16:57,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20801230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:57,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:57,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:16:57,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728928504] [2021-11-07 02:16:57,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:16:57,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:57,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:16:57,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:16:57,454 INFO L87 Difference]: Start difference. First operand 1224 states and 2084 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:58,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:58,008 INFO L93 Difference]: Finished difference Result 4804 states and 8202 transitions. [2021-11-07 02:16:58,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:16:58,009 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-07 02:16:58,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:58,036 INFO L225 Difference]: With dead ends: 4804 [2021-11-07 02:16:58,036 INFO L226 Difference]: Without dead ends: 3606 [2021-11-07 02:16:58,039 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 134 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 02:16:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3606 states. [2021-11-07 02:16:58,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3606 to 1224. [2021-11-07 02:16:58,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1224 states, 1218 states have (on average 1.7085385878489328) internal successors, (2081), 1223 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states 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 02:16:58,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1224 states to 1224 states and 2081 transitions. [2021-11-07 02:16:58,187 INFO L78 Accepts]: Start accepts. Automaton has 1224 states and 2081 transitions. Word has length 70 [2021-11-07 02:16:58,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:16:58,188 INFO L470 AbstractCegarLoop]: Abstraction has 1224 states and 2081 transitions. [2021-11-07 02:16:58,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:16:58,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1224 states and 2081 transitions. [2021-11-07 02:16:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 02:16:58,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:16:58,191 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:16:58,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:16:58,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:16:58,412 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 02:16:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:16:58,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1587868366, now seen corresponding path program 1 times [2021-11-07 02:16:58,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:16:58,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2001402297] [2021-11-07 02:16:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:16:58,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:16:58,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:16:58,417 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:16:58,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:16:59,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:16:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:16:59,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:16:59,397 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 02:16:59,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:16:59,613 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 02:16:59,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:16:59,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2001402297] [2021-11-07 02:16:59,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2001402297] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:16:59,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:16:59,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:16:59,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344954246] [2021-11-07 02:16:59,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:16:59,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:16:59,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:16:59,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:16:59,616 INFO L87 Difference]: Start difference. First operand 1224 states and 2081 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 02:16:59,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:16:59,902 INFO L93 Difference]: Finished difference Result 3359 states and 5701 transitions. [2021-11-07 02:16:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:16:59,902 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 72 [2021-11-07 02:16:59,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:16:59,921 INFO L225 Difference]: With dead ends: 3359 [2021-11-07 02:16:59,922 INFO L226 Difference]: Without dead ends: 2422 [2021-11-07 02:16:59,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 140 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 02:16:59,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2021-11-07 02:17:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1485. [2021-11-07 02:17:00,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1479 states have (on average 1.7315753887762002) internal successors, (2561), 1484 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states 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 02:17:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 2561 transitions. [2021-11-07 02:17:00,080 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 2561 transitions. Word has length 72 [2021-11-07 02:17:00,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:00,081 INFO L470 AbstractCegarLoop]: Abstraction has 1485 states and 2561 transitions. [2021-11-07 02:17:00,081 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 02:17:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 2561 transitions. [2021-11-07 02:17:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 02:17:00,091 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:00,092 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:00,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:00,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:00,311 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 02:17:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:00,311 INFO L85 PathProgramCache]: Analyzing trace with hash 131722429, now seen corresponding path program 1 times [2021-11-07 02:17:00,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:00,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490140527] [2021-11-07 02:17:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:00,313 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:00,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:00,315 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:00,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:17:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:00,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:01,259 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 02:17:01,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:01,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:17:01,520 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:01,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490140527] [2021-11-07 02:17:01,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490140527] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:01,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:01,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:01,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409450194] [2021-11-07 02:17:01,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:01,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:01,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:01,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:01,522 INFO L87 Difference]: Start difference. First operand 1485 states and 2561 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:01,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:01,789 INFO L93 Difference]: Finished difference Result 4032 states and 6942 transitions. [2021-11-07 02:17:01,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:01,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-11-07 02:17:01,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:01,810 INFO L225 Difference]: With dead ends: 4032 [2021-11-07 02:17:01,810 INFO L226 Difference]: Without dead ends: 2631 [2021-11-07 02:17:01,814 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2631 states. [2021-11-07 02:17:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2631 to 1694. [2021-11-07 02:17:01,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1694 states, 1688 states have (on average 1.7440758293838863) internal successors, (2944), 1693 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states 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 02:17:01,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1694 states to 1694 states and 2944 transitions. [2021-11-07 02:17:01,978 INFO L78 Accepts]: Start accepts. Automaton has 1694 states and 2944 transitions. Word has length 84 [2021-11-07 02:17:01,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:01,978 INFO L470 AbstractCegarLoop]: Abstraction has 1694 states and 2944 transitions. [2021-11-07 02:17:01,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:01,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1694 states and 2944 transitions. [2021-11-07 02:17:01,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:17:01,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:01,982 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:02,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:02,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:02,197 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 02:17:02,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1828568514, now seen corresponding path program 1 times [2021-11-07 02:17:02,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:02,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [549559048] [2021-11-07 02:17:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:02,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:02,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:02,200 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:02,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:17:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:02,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:02,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:03,160 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 02:17:03,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:03,416 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 02:17:03,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:03,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [549559048] [2021-11-07 02:17:03,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [549559048] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:03,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:03,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:03,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214530426] [2021-11-07 02:17:03,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:03,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:03,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:03,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:03,422 INFO L87 Difference]: Start difference. First operand 1694 states and 2944 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:03,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:03,803 INFO L93 Difference]: Finished difference Result 4691 states and 8156 transitions. [2021-11-07 02:17:03,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:03,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-11-07 02:17:03,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:03,827 INFO L225 Difference]: With dead ends: 4691 [2021-11-07 02:17:03,828 INFO L226 Difference]: Without dead ends: 3089 [2021-11-07 02:17:03,833 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 167 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 02:17:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3089 states. [2021-11-07 02:17:04,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3089 to 2152. [2021-11-07 02:17:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2146 states have (on average 1.7642124883504193) internal successors, (3786), 2151 states have internal predecessors, (3786), 0 states have call successors, (0), 0 states 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 02:17:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3786 transitions. [2021-11-07 02:17:04,063 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3786 transitions. Word has length 85 [2021-11-07 02:17:04,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:04,063 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 3786 transitions. [2021-11-07 02:17:04,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3786 transitions. [2021-11-07 02:17:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 02:17:04,069 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:04,069 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:04,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:04,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:04,285 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 02:17:04,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:04,285 INFO L85 PathProgramCache]: Analyzing trace with hash -168015537, now seen corresponding path program 1 times [2021-11-07 02:17:04,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:04,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589777117] [2021-11-07 02:17:04,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:04,287 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:04,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:04,291 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:04,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:17:05,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:05,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:05,365 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 02:17:05,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:05,588 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 02:17:05,588 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:05,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589777117] [2021-11-07 02:17:05,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589777117] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:05,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:05,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:05,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607681262] [2021-11-07 02:17:05,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:05,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:05,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:05,593 INFO L87 Difference]: Start difference. First operand 2152 states and 3786 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 02:17:05,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:05,927 INFO L93 Difference]: Finished difference Result 6045 states and 10651 transitions. [2021-11-07 02:17:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 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 86 [2021-11-07 02:17:05,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:05,980 INFO L225 Difference]: With dead ends: 6045 [2021-11-07 02:17:05,982 INFO L226 Difference]: Without dead ends: 3993 [2021-11-07 02:17:05,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 169 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 02:17:05,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-11-07 02:17:06,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 3056. [2021-11-07 02:17:06,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3056 states, 3050 states have (on average 1.7865573770491803) internal successors, (5449), 3055 states have internal predecessors, (5449), 0 states have call successors, (0), 0 states 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 02:17:06,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3056 states to 3056 states and 5449 transitions. [2021-11-07 02:17:06,246 INFO L78 Accepts]: Start accepts. Automaton has 3056 states and 5449 transitions. Word has length 86 [2021-11-07 02:17:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:06,246 INFO L470 AbstractCegarLoop]: Abstraction has 3056 states and 5449 transitions. [2021-11-07 02:17:06,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states 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 02:17:06,247 INFO L276 IsEmpty]: Start isEmpty. Operand 3056 states and 5449 transitions. [2021-11-07 02:17:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 02:17:06,253 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:06,254 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:06,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:06,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:06,469 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 02:17:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:06,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1969183695, now seen corresponding path program 1 times [2021-11-07 02:17:06,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:06,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157130761] [2021-11-07 02:17:06,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:06,470 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:06,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:06,471 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:06,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:17:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:07,421 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 02:17:07,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:07,660 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 02:17:07,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:07,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157130761] [2021-11-07 02:17:07,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157130761] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:07,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:07,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:07,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586201180] [2021-11-07 02:17:07,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:07,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:07,662 INFO L87 Difference]: Start difference. First operand 3056 states and 5449 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 02:17:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:08,052 INFO L93 Difference]: Finished difference Result 8493 states and 15159 transitions. [2021-11-07 02:17:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:08,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-11-07 02:17:08,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:08,073 INFO L225 Difference]: With dead ends: 8493 [2021-11-07 02:17:08,073 INFO L226 Difference]: Without dead ends: 5571 [2021-11-07 02:17:08,080 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 171 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 02:17:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2021-11-07 02:17:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 4634. [2021-11-07 02:17:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4634 states, 4628 states have (on average 1.8042350907519447) internal successors, (8350), 4633 states have internal predecessors, (8350), 0 states have call successors, (0), 0 states 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 02:17:08,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 8350 transitions. [2021-11-07 02:17:08,473 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 8350 transitions. Word has length 87 [2021-11-07 02:17:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:08,474 INFO L470 AbstractCegarLoop]: Abstraction has 4634 states and 8350 transitions. [2021-11-07 02:17:08,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states 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 02:17:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 8350 transitions. [2021-11-07 02:17:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 02:17:08,485 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:08,485 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:08,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:08,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:08,705 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 02:17:08,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:08,705 INFO L85 PathProgramCache]: Analyzing trace with hash -703254594, now seen corresponding path program 1 times [2021-11-07 02:17:08,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:08,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1345056901] [2021-11-07 02:17:08,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:08,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:08,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:08,708 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:08,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:17:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:09,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:09,772 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 02:17:09,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:10,028 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 02:17:10,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:10,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1345056901] [2021-11-07 02:17:10,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1345056901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:10,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:10,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:10,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385887809] [2021-11-07 02:17:10,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:10,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:10,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:10,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:10,031 INFO L87 Difference]: Start difference. First operand 4634 states and 8350 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 02:17:10,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:10,620 INFO L93 Difference]: Finished difference Result 12943 states and 23345 transitions. [2021-11-07 02:17:10,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:10,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 88 [2021-11-07 02:17:10,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:10,650 INFO L225 Difference]: With dead ends: 12943 [2021-11-07 02:17:10,650 INFO L226 Difference]: Without dead ends: 8477 [2021-11-07 02:17:10,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 173 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 02:17:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8477 states. [2021-11-07 02:17:11,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8477 to 7540. [2021-11-07 02:17:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7540 states, 7534 states have (on average 1.8166976373772232) internal successors, (13687), 7539 states have internal predecessors, (13687), 0 states have call successors, (0), 0 states 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 02:17:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7540 states to 7540 states and 13687 transitions. [2021-11-07 02:17:11,337 INFO L78 Accepts]: Start accepts. Automaton has 7540 states and 13687 transitions. Word has length 88 [2021-11-07 02:17:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:11,338 INFO L470 AbstractCegarLoop]: Abstraction has 7540 states and 13687 transitions. [2021-11-07 02:17:11,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 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 02:17:11,339 INFO L276 IsEmpty]: Start isEmpty. Operand 7540 states and 13687 transitions. [2021-11-07 02:17:11,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 02:17:11,357 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:11,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:11,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:11,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:11,578 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 02:17:11,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:11,579 INFO L85 PathProgramCache]: Analyzing trace with hash 1318137694, now seen corresponding path program 1 times [2021-11-07 02:17:11,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:11,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154055543] [2021-11-07 02:17:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:11,580 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:11,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:11,583 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:11,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:17:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:12,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:12,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:12,674 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 02:17:12,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:12,918 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 02:17:12,919 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:12,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154055543] [2021-11-07 02:17:12,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154055543] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:12,919 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:12,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:12,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109365994] [2021-11-07 02:17:12,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:12,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:12,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:12,921 INFO L87 Difference]: Start difference. First operand 7540 states and 13687 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:13,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:13,789 INFO L93 Difference]: Finished difference Result 21987 states and 39967 transitions. [2021-11-07 02:17:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 02:17:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:13,836 INFO L225 Difference]: With dead ends: 21987 [2021-11-07 02:17:13,836 INFO L226 Difference]: Without dead ends: 14623 [2021-11-07 02:17:13,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 175 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 02:17:13,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14623 states. [2021-11-07 02:17:14,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14623 to 13686. [2021-11-07 02:17:14,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13686 states, 13680 states have (on average 1.8251461988304094) internal successors, (24968), 13685 states have internal predecessors, (24968), 0 states have call successors, (0), 0 states 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 02:17:14,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13686 states to 13686 states and 24968 transitions. [2021-11-07 02:17:14,866 INFO L78 Accepts]: Start accepts. Automaton has 13686 states and 24968 transitions. Word has length 89 [2021-11-07 02:17:14,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:14,867 INFO L470 AbstractCegarLoop]: Abstraction has 13686 states and 24968 transitions. [2021-11-07 02:17:14,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:14,867 INFO L276 IsEmpty]: Start isEmpty. Operand 13686 states and 24968 transitions. [2021-11-07 02:17:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 02:17:14,891 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:14,892 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:14,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:15,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:15,112 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 02:17:15,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:15,112 INFO L85 PathProgramCache]: Analyzing trace with hash -967987154, now seen corresponding path program 1 times [2021-11-07 02:17:15,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:15,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [916506905] [2021-11-07 02:17:15,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:15,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:15,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:15,114 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:15,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:17:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:17:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:16,318 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 02:17:16,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:16,621 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 02:17:16,622 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:16,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [916506905] [2021-11-07 02:17:16,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [916506905] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:16,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:16,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:17:16,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013628425] [2021-11-07 02:17:16,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:17:16,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:17:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:17:16,626 INFO L87 Difference]: Start difference. First operand 13686 states and 24968 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:20,269 INFO L93 Difference]: Finished difference Result 34155 states and 62269 transitions. [2021-11-07 02:17:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:17:20,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 02:17:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:20,333 INFO L225 Difference]: With dead ends: 34155 [2021-11-07 02:17:20,333 INFO L226 Difference]: Without dead ends: 20766 [2021-11-07 02:17:20,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 174 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 02:17:20,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20766 states. [2021-11-07 02:17:21,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20766 to 13653. [2021-11-07 02:17:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13653 states, 13647 states have (on average 1.8198871546860116) internal successors, (24836), 13652 states have internal predecessors, (24836), 0 states have call successors, (0), 0 states 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 02:17:21,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13653 states to 13653 states and 24836 transitions. [2021-11-07 02:17:21,573 INFO L78 Accepts]: Start accepts. Automaton has 13653 states and 24836 transitions. Word has length 90 [2021-11-07 02:17:21,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:21,573 INFO L470 AbstractCegarLoop]: Abstraction has 13653 states and 24836 transitions. [2021-11-07 02:17:21,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 13653 states and 24836 transitions. [2021-11-07 02:17:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 02:17:21,597 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:21,597 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:21,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:21,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:21,813 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 02:17:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:21,813 INFO L85 PathProgramCache]: Analyzing trace with hash -753607633, now seen corresponding path program 1 times [2021-11-07 02:17:21,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:21,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1032601991] [2021-11-07 02:17:21,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:21,815 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:21,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:21,817 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:21,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:17:22,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:22,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:22,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:23,096 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 02:17:23,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:23,367 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 02:17:23,367 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:23,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1032601991] [2021-11-07 02:17:23,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1032601991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:23,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:23,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:23,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82866092] [2021-11-07 02:17:23,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:23,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:23,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:23,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:23,370 INFO L87 Difference]: Start difference. First operand 13653 states and 24836 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:24,758 INFO L93 Difference]: Finished difference Result 40158 states and 73121 transitions. [2021-11-07 02:17:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-11-07 02:17:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:24,843 INFO L225 Difference]: With dead ends: 40158 [2021-11-07 02:17:24,843 INFO L226 Difference]: Without dead ends: 26688 [2021-11-07 02:17:24,865 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 177 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 02:17:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26688 states. [2021-11-07 02:17:26,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26688 to 25751. [2021-11-07 02:17:26,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25751 states, 25745 states have (on average 1.8236162361623616) internal successors, (46949), 25750 states have internal predecessors, (46949), 0 states have call successors, (0), 0 states 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 02:17:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25751 states to 25751 states and 46949 transitions. [2021-11-07 02:17:26,605 INFO L78 Accepts]: Start accepts. Automaton has 25751 states and 46949 transitions. Word has length 90 [2021-11-07 02:17:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:26,606 INFO L470 AbstractCegarLoop]: Abstraction has 25751 states and 46949 transitions. [2021-11-07 02:17:26,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 25751 states and 46949 transitions. [2021-11-07 02:17:26,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 02:17:26,644 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:26,644 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:26,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:26,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:26,865 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 02:17:26,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:26,865 INFO L85 PathProgramCache]: Analyzing trace with hash 981623151, now seen corresponding path program 1 times [2021-11-07 02:17:26,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:26,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2106129573] [2021-11-07 02:17:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:26,866 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:26,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:26,867 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:26,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:17:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:27,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 584 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:27,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:28,067 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 02:17:28,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:28,353 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 02:17:28,354 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:28,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2106129573] [2021-11-07 02:17:28,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2106129573] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:28,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:28,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:28,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733472606] [2021-11-07 02:17:28,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:28,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:28,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:28,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:28,356 INFO L87 Difference]: Start difference. First operand 25751 states and 46949 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 02:17:30,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:30,749 INFO L93 Difference]: Finished difference Result 71091 states and 129196 transitions. [2021-11-07 02:17:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:30,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-11-07 02:17:30,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:30,888 INFO L225 Difference]: With dead ends: 71091 [2021-11-07 02:17:30,888 INFO L226 Difference]: Without dead ends: 45570 [2021-11-07 02:17:30,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 179 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 02:17:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45570 states. [2021-11-07 02:17:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45570 to 44633. [2021-11-07 02:17:33,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44633 states, 44627 states have (on average 1.813565778564546) internal successors, (80934), 44632 states have internal predecessors, (80934), 0 states have call successors, (0), 0 states 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 02:17:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44633 states to 44633 states and 80934 transitions. [2021-11-07 02:17:33,593 INFO L78 Accepts]: Start accepts. Automaton has 44633 states and 80934 transitions. Word has length 91 [2021-11-07 02:17:33,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:33,593 INFO L470 AbstractCegarLoop]: Abstraction has 44633 states and 80934 transitions. [2021-11-07 02:17:33,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states 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 02:17:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 44633 states and 80934 transitions. [2021-11-07 02:17:33,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:17:33,638 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:33,638 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:33,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:33,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:33,861 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 02:17:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1719422760, now seen corresponding path program 1 times [2021-11-07 02:17:33,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:33,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1311283084] [2021-11-07 02:17:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:33,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:33,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:33,864 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:33,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:17:34,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:34,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 02:17:34,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:35,154 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 02:17:35,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:35,483 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 02:17:35,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:35,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1311283084] [2021-11-07 02:17:35,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1311283084] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:35,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:35,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:17:35,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162502285] [2021-11-07 02:17:35,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:17:35,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:35,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:17:35,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:17:35,487 INFO L87 Difference]: Start difference. First operand 44633 states and 80934 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:44,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:44,222 INFO L93 Difference]: Finished difference Result 173800 states and 315037 transitions. [2021-11-07 02:17:44,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:17:44,223 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:17:44,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:44,547 INFO L225 Difference]: With dead ends: 173800 [2021-11-07 02:17:44,548 INFO L226 Difference]: Without dead ends: 129463 [2021-11-07 02:17:44,597 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 178 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 02:17:44,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129463 states. [2021-11-07 02:17:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129463 to 44375. [2021-11-07 02:17:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44375 states, 44369 states have (on average 1.8008519461786383) internal successors, (79902), 44374 states have internal predecessors, (79902), 0 states have call successors, (0), 0 states 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 02:17:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44375 states to 44375 states and 79902 transitions. [2021-11-07 02:17:48,576 INFO L78 Accepts]: Start accepts. Automaton has 44375 states and 79902 transitions. Word has length 92 [2021-11-07 02:17:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:48,577 INFO L470 AbstractCegarLoop]: Abstraction has 44375 states and 79902 transitions. [2021-11-07 02:17:48,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:17:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 44375 states and 79902 transitions. [2021-11-07 02:17:48,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:17:48,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:48,608 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:48,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:48,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:48,821 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 02:17:48,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:48,821 INFO L85 PathProgramCache]: Analyzing trace with hash 613755210, now seen corresponding path program 1 times [2021-11-07 02:17:48,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:48,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [968629767] [2021-11-07 02:17:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:48,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:48,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:48,823 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:48,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:17:49,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:49,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:49,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:50,132 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 02:17:50,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:50,387 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 02:17:50,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:50,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [968629767] [2021-11-07 02:17:50,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [968629767] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:50,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:50,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:17:50,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197486096] [2021-11-07 02:17:50,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:17:50,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:50,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:17:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:17:50,389 INFO L87 Difference]: Start difference. First operand 44375 states and 79902 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 02:17:53,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:17:53,091 INFO L93 Difference]: Finished difference Result 89385 states and 160864 transitions. [2021-11-07 02:17:53,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:17:53,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:17:53,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:17:53,175 INFO L225 Difference]: With dead ends: 89385 [2021-11-07 02:17:53,175 INFO L226 Difference]: Without dead ends: 45312 [2021-11-07 02:17:53,207 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 180 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 02:17:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45312 states. [2021-11-07 02:17:55,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45312 to 44375. [2021-11-07 02:17:55,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44375 states, 44369 states have (on average 1.797967049065789) internal successors, (79774), 44374 states have internal predecessors, (79774), 0 states have call successors, (0), 0 states 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 02:17:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44375 states to 44375 states and 79774 transitions. [2021-11-07 02:17:56,047 INFO L78 Accepts]: Start accepts. Automaton has 44375 states and 79774 transitions. Word has length 92 [2021-11-07 02:17:56,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:17:56,047 INFO L470 AbstractCegarLoop]: Abstraction has 44375 states and 79774 transitions. [2021-11-07 02:17:56,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states 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 02:17:56,048 INFO L276 IsEmpty]: Start isEmpty. Operand 44375 states and 79774 transitions. [2021-11-07 02:17:56,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 02:17:56,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:17:56,065 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:17:56,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:17:56,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:17:56,281 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 02:17:56,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:17:56,281 INFO L85 PathProgramCache]: Analyzing trace with hash -934853507, now seen corresponding path program 1 times [2021-11-07 02:17:56,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:17:56,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249895726] [2021-11-07 02:17:56,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:17:56,282 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:17:56,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:17:56,283 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:17:56,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ef69bbc-8b33-49fe-b713-dc03230e94d6/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:17:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:17:57,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:17:57,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:17:57,609 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 02:17:57,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:17:57,848 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 02:17:57,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:17:57,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249895726] [2021-11-07 02:17:57,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249895726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:17:57,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:17:57,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:17:57,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741064203] [2021-11-07 02:17:57,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:17:57,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:17:57,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:17:57,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:17:57,851 INFO L87 Difference]: Start difference. First operand 44375 states and 79774 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:18:02,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:18:02,230 INFO L93 Difference]: Finished difference Result 124627 states and 223786 transitions. [2021-11-07 02:18:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:18:02,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-11-07 02:18:02,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:18:02,402 INFO L225 Difference]: With dead ends: 124627 [2021-11-07 02:18:02,402 INFO L226 Difference]: Without dead ends: 80514 [2021-11-07 02:18:02,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 02:18:02,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80514 states.