./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/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 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:04,611 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:04,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:04,655 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:04,656 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:04,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:04,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:04,663 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:04,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:04,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:04,669 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:04,671 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:04,672 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:04,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:04,676 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:04,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:04,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:04,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:04,685 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:04,688 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:04,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:04,693 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:04,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:04,696 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:04,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:04,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:04,703 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:04,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:04,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:04,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:04,707 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:04,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:04,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:04,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:04,713 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:04,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:04,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:04,715 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:04,715 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:04,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:04,717 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:04,719 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:44:04,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:04,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:04,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:04,755 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:04,755 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:04,756 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:04,756 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:44:04,756 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:04,756 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:04,757 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:44:04,757 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:44:04,757 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:04,757 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:44:04,758 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:44:04,758 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:44:04,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:04,759 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:04,759 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:44:04,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:04,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:04,760 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:04,760 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:04,761 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:04,761 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:04,761 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:04,761 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:04,762 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:04,762 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:04,762 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:04,762 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:04,763 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:04,763 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:04,763 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:04,763 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:04,764 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:44:04,764 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:44:04,764 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:04,764 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:04,765 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:04,765 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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 [2021-11-07 01:44:05,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:05,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:05,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:05,144 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:05,145 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:05,146 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2021-11-07 01:44:05,237 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data/555ef7733/0048006cf0884ace91935eeecf8e356d/FLAG9cba48aa1 [2021-11-07 01:44:06,066 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:06,066 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2021-11-07 01:44:06,096 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data/555ef7733/0048006cf0884ace91935eeecf8e356d/FLAG9cba48aa1 [2021-11-07 01:44:06,289 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data/555ef7733/0048006cf0884ace91935eeecf8e356d [2021-11-07 01:44:06,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:06,294 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:06,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:06,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:06,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:06,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58b357e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:06, skipping insertion in model container [2021-11-07 01:44:06,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:06" (1/1) ... [2021-11-07 01:44:06,312 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:06,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:07,067 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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2021-11-07 01:44:07,096 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:07,131 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:44:07,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2419fd84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:07, skipping insertion in model container [2021-11-07 01:44:07,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:07,135 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:44:07,141 INFO L168 Benchmark]: Toolchain (without parser) took 842.34 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 46.6 MB in the beginning and 69.7 MB in the end (delta: -23.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:07,142 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 65.4 MB in the beginning and 65.3 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:44:07,144 INFO L168 Benchmark]: CACSL2BoogieTranslator took 839.00 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 46.4 MB in the beginning and 69.7 MB in the end (delta: -23.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-07 01:44:07,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 86.0 MB. Free memory was 65.4 MB in the beginning and 65.3 MB in the end (delta: 117.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 839.00 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 46.4 MB in the beginning and 69.7 MB in the end (delta: -23.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1050]: 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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/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 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:44:10,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:44:10,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:44:10,081 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:44:10,082 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:44:10,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:44:10,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:44:10,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:44:10,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:44:10,094 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:44:10,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:44:10,098 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:44:10,099 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:44:10,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:44:10,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:44:10,105 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:44:10,107 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:44:10,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:44:10,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:44:10,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:44:10,117 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:44:10,119 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:44:10,122 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:44:10,123 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:44:10,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:44:10,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:44:10,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:44:10,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:44:10,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:44:10,133 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:44:10,134 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:44:10,135 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:44:10,136 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:44:10,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:44:10,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:44:10,140 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:44:10,142 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:44:10,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:44:10,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:44:10,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:44:10,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:44:10,148 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:44:10,191 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:44:10,191 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:44:10,192 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:44:10,193 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:44:10,193 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:44:10,193 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:44:10,194 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:44:10,194 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:44:10,194 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:44:10,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:44:10,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:44:10,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:44:10,196 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:44:10,196 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:44:10,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:44:10,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:44:10,197 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:44:10,197 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:44:10,198 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:44:10,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:44:10,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:44:10,199 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:44:10,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:44:10,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:44:10,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:44:10,200 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:44:10,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:10,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:44:10,201 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:44:10,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:44:10,201 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:44:10,201 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:44:10,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:44:10,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:44:10,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:44:10,203 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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09c9794f5f58d2adbebf8646c3b68c44e11cb48c003f44efee5afa1932865143 [2021-11-07 01:44:10,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:44:10,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:44:10,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:44:10,738 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:44:10,739 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:44:10,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2021-11-07 01:44:10,840 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data/37934b955/fec67e26e8a54c20abd4b9118de87a73/FLAGdaa1de1d9 [2021-11-07 01:44:11,829 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:44:11,830 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c [2021-11-07 01:44:11,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data/37934b955/fec67e26e8a54c20abd4b9118de87a73/FLAGdaa1de1d9 [2021-11-07 01:44:11,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/data/37934b955/fec67e26e8a54c20abd4b9118de87a73 [2021-11-07 01:44:11,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:44:11,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:44:11,969 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:11,969 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:44:11,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:44:11,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:11" (1/1) ... [2021-11-07 01:44:11,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3095a283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:11, skipping insertion in model container [2021-11-07 01:44:11,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:44:11" (1/1) ... [2021-11-07 01:44:11,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:44:12,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:12,610 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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2021-11-07 01:44:12,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:12,666 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:44:12,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:44:12,826 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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2021-11-07 01:44:12,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:12,853 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:44:13,050 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_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/sv-benchmarks/c/openssl/s3_srvr.blast.08.i.cil-2.c[74416,74429] [2021-11-07 01:44:13,053 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:44:13,083 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:44:13,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13 WrapperNode [2021-11-07 01:44:13,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:44:13,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:13,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:44:13,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:44:13,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:44:13,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:44:13,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:44:13,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:44:13,248 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,280 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,280 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:44:13,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:44:13,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:44:13,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:44:13,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (1/1) ... [2021-11-07 01:44:13,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:44:13,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:44:13,436 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:44:13,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:44:13,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:44:13,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:44:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:44:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:44:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:44:13,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:44:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:44:13,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:44:13,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:44:13,812 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 01:44:26,036 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-07 01:44:26,037 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-07 01:44:26,052 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:44:26,052 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 01:44:26,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:26 BoogieIcfgContainer [2021-11-07 01:44:26,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:44:26,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:44:26,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:44:26,059 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:44:26,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:44:11" (1/3) ... [2021-11-07 01:44:26,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d534594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:26, skipping insertion in model container [2021-11-07 01:44:26,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:44:13" (2/3) ... [2021-11-07 01:44:26,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d534594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:44:26, skipping insertion in model container [2021-11-07 01:44:26,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:44:26" (3/3) ... [2021-11-07 01:44:26,063 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.08.i.cil-2.c [2021-11-07 01:44:26,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:44:26,071 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 01:44:26,156 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:44:26,169 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:44:26,169 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 01:44:26,209 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:44:26,232 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:26,233 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:26,234 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:26,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:26,270 INFO L85 PathProgramCache]: Analyzing trace with hash 917223126, now seen corresponding path program 1 times [2021-11-07 01:44:26,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:26,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337397242] [2021-11-07 01:44:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:26,292 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:26,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:26,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:26,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:44:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:26,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 01:44:26,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:26,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:44:27,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:44:27,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:27,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:44:27,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:27,214 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-07 01:44:27,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 319 [2021-11-07 01:44:27,892 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-07 01:44:27,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 8 case distinctions, treesize of input 717 treesize of output 669 [2021-11-07 01:44:27,970 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:27,973 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-07 01:44:27,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 210 [2021-11-07 01:44:27,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,117 INFO L244 Elim1Store]: Index analysis took 103 ms [2021-11-07 01:44:28,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 36 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 101 [2021-11-07 01:44:28,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:44:28,334 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-07 01:44:28,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:44:28,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:28,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 13 [2021-11-07 01:44:28,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-07 01:44:28,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-11-07 01:44:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:28,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:44:28,976 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:28,984 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-07 01:44:28,993 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,001 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-07 01:44:29,207 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,210 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-07 01:44:29,219 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,223 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-07 01:44:29,236 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,240 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-07 01:44:29,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-07 01:44:29,289 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,294 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-07 01:44:29,347 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-07 01:44:29,362 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-07 01:44:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:44:30,045 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:44:30,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337397242] [2021-11-07 01:44:30,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337397242] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:44:30,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:44:30,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-07 01:44:30,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102514651] [2021-11-07 01:44:30,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 01:44:30,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:44:30,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 01:44:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:44:30,086 INFO L87 Difference]: Start difference. First operand has 150 states, 148 states have (on average 1.7162162162162162) internal successors, (254), 149 states have internal predecessors, (254), 0 states have call successors, (0), 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 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:44:56,341 INFO L93 Difference]: Finished difference Result 301 states and 507 transitions. [2021-11-07 01:44:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:44:56,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:44:56,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:44:56,359 INFO L225 Difference]: With dead ends: 301 [2021-11-07 01:44:56,360 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 01:44:56,364 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:44:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 01:44:56,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-11-07 01:44:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.536764705882353) internal successors, (209), 136 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:56,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 209 transitions. [2021-11-07 01:44:56,446 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 209 transitions. Word has length 44 [2021-11-07 01:44:56,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:44:56,447 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 209 transitions. [2021-11-07 01:44:56,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 8 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:44:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 209 transitions. [2021-11-07 01:44:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:44:56,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:44:56,451 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:44:56,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:44:56,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:44:56,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:44:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:44:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1165369620, now seen corresponding path program 1 times [2021-11-07 01:44:56,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:44:56,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469568130] [2021-11-07 01:44:56,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:44:56,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:44:56,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:44:56,673 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:44:56,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:44:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:44:57,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:44:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:44:57,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:57,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:57,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:57,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:44:57,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:44:57,871 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:44:57,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:45:01,564 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:45:01,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:45:09,963 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:45:09,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:45:10,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:10,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:45:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:45:18,490 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:45:18,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469568130] [2021-11-07 01:45:18,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469568130] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:45:18,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:45:18,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 6 [2021-11-07 01:45:18,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541183032] [2021-11-07 01:45:18,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:45:18,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:45:18,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:45:18,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=15, Unknown=3, NotChecked=0, Total=30 [2021-11-07 01:45:18,494 INFO L87 Difference]: Start difference. First operand 137 states and 209 transitions. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:52,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:45:52,395 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2021-11-07 01:45:52,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:45:52,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:45:52,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:45:52,399 INFO L225 Difference]: With dead ends: 292 [2021-11-07 01:45:52,400 INFO L226 Difference]: Without dead ends: 165 [2021-11-07 01:45:52,402 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=18, Invalid=21, Unknown=3, NotChecked=0, Total=42 [2021-11-07 01:45:52,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-07 01:45:52,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 148. [2021-11-07 01:45:52,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 147 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 228 transitions. [2021-11-07 01:45:52,417 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 228 transitions. Word has length 44 [2021-11-07 01:45:52,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:45:52,418 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 228 transitions. [2021-11-07 01:45:52,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:45:52,418 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 228 transitions. [2021-11-07 01:45:52,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-07 01:45:52,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:45:52,422 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:45:52,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:45:52,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:45:52,628 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:45:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:45:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1275810449, now seen corresponding path program 1 times [2021-11-07 01:45:52,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:45:52,631 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [68064194] [2021-11-07 01:45:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:45:52,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:45:52,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:45:52,633 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:45:52,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:45:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:45:53,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:45:53,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:45:53,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:53,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:53,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:53,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:53,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:45:53,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:45:53,888 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:45:53,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:45:57,463 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:45:57,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:46:05,133 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:46:05,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:46:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:05,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:05,708 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:05,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [68064194] [2021-11-07 01:46:05,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [68064194] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:05,708 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:05,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:46:05,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481544299] [2021-11-07 01:46:05,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:05,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:05,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:05,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:46:05,712 INFO L87 Difference]: Start difference. First operand 148 states and 228 transitions. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:46:44,127 INFO L93 Difference]: Finished difference Result 409 states and 627 transitions. [2021-11-07 01:46:44,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:46:44,128 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-07 01:46:44,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:46:44,131 INFO L225 Difference]: With dead ends: 409 [2021-11-07 01:46:44,131 INFO L226 Difference]: Without dead ends: 282 [2021-11-07 01:46:44,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:46:44,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-11-07 01:46:44,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 164. [2021-11-07 01:46:44,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.5521472392638036) internal successors, (253), 163 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 253 transitions. [2021-11-07 01:46:44,151 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 253 transitions. Word has length 57 [2021-11-07 01:46:44,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:46:44,152 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 253 transitions. [2021-11-07 01:46:44,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:46:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 253 transitions. [2021-11-07 01:46:44,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:46:44,155 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:46:44,155 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:46:44,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:46:44,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:46:44,371 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:46:44,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:46:44,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1447117946, now seen corresponding path program 1 times [2021-11-07 01:46:44,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:46:44,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [718788639] [2021-11-07 01:46:44,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:46:44,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:46:44,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:46:44,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:46:44,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:46:44,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:46:44,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:46:44,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:46:45,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:45,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:45,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:46:45,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:46:45,460 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:46:45,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:46:48,744 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:46:48,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:46:55,515 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:46:55,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:46:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:55,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:46:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:46:56,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:46:56,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [718788639] [2021-11-07 01:46:56,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [718788639] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:46:56,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:46:56,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:46:56,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559183753] [2021-11-07 01:46:56,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:46:56,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:46:56,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:46:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:46:56,049 INFO L87 Difference]: Start difference. First operand 164 states and 253 transitions. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:47:29,470 INFO L93 Difference]: Finished difference Result 455 states and 702 transitions. [2021-11-07 01:47:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:47:29,472 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:47:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:47:29,474 INFO L225 Difference]: With dead ends: 455 [2021-11-07 01:47:29,474 INFO L226 Difference]: Without dead ends: 312 [2021-11-07 01:47:29,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:47:29,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-11-07 01:47:29,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 186. [2021-11-07 01:47:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.5351351351351352) internal successors, (284), 185 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 284 transitions. [2021-11-07 01:47:29,494 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 284 transitions. Word has length 58 [2021-11-07 01:47:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:47:29,494 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 284 transitions. [2021-11-07 01:47:29,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 284 transitions. [2021-11-07 01:47:29,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:47:29,497 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:29,497 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:47:29,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:47:29,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:47:29,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:47:29,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:29,705 INFO L85 PathProgramCache]: Analyzing trace with hash 399607142, now seen corresponding path program 1 times [2021-11-07 01:47:29,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:29,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203770223] [2021-11-07 01:47:29,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:29,712 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:29,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:29,714 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:29,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:47:30,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:47:30,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:30,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:47:30,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:47:30,754 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:47:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:47:33,891 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:47:33,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:47:40,728 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:47:40,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:47:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:40,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:41,225 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:41,225 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203770223] [2021-11-07 01:47:41,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203770223] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:41,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:41,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:47:41,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966687566] [2021-11-07 01:47:41,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:47:41,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:41,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:47:41,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:47:41,227 INFO L87 Difference]: Start difference. First operand 186 states and 284 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 01:48:14,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:14,096 INFO L93 Difference]: Finished difference Result 488 states and 746 transitions. [2021-11-07 01:48:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:48:14,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 58 [2021-11-07 01:48:14,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:14,100 INFO L225 Difference]: With dead ends: 488 [2021-11-07 01:48:14,100 INFO L226 Difference]: Without dead ends: 323 [2021-11-07 01:48:14,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:48:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-07 01:48:14,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 220. [2021-11-07 01:48:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.5114155251141552) internal successors, (331), 219 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:14,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 331 transitions. [2021-11-07 01:48:14,115 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 331 transitions. Word has length 58 [2021-11-07 01:48:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:14,115 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 331 transitions. [2021-11-07 01:48:14,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 7 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 01:48:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 331 transitions. [2021-11-07 01:48:14,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:48:14,118 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:14,118 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:48:14,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:14,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:14,335 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:48:14,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:14,335 INFO L85 PathProgramCache]: Analyzing trace with hash -736259153, now seen corresponding path program 1 times [2021-11-07 01:48:14,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:14,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [401793648] [2021-11-07 01:48:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:14,336 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:14,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:14,337 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:14,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:48:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:14,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:48:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:15,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:15,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:15,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:48:15,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:48:15,361 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:48:15,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:48:18,650 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:48:18,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:48:26,322 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:48:26,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:48:26,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:26,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:26,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:26,916 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:26,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [401793648] [2021-11-07 01:48:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [401793648] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:26,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:26,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:48:26,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233799178] [2021-11-07 01:48:26,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:48:26,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:48:26,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:48:26,919 INFO L87 Difference]: Start difference. First operand 220 states and 331 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:15,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:15,461 INFO L93 Difference]: Finished difference Result 544 states and 824 transitions. [2021-11-07 01:49:15,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:15,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-07 01:49:15,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:15,465 INFO L225 Difference]: With dead ends: 544 [2021-11-07 01:49:15,466 INFO L226 Difference]: Without dead ends: 355 [2021-11-07 01:49:15,466 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:49:15,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-11-07 01:49:15,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 226. [2021-11-07 01:49:15,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5155555555555555) internal successors, (341), 225 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:15,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 341 transitions. [2021-11-07 01:49:15,483 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 341 transitions. Word has length 58 [2021-11-07 01:49:15,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:15,484 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 341 transitions. [2021-11-07 01:49:15,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:15,484 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 341 transitions. [2021-11-07 01:49:15,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:49:15,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:15,487 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:49:15,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:15,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:15,700 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:49:15,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:15,701 INFO L85 PathProgramCache]: Analyzing trace with hash 584594159, now seen corresponding path program 1 times [2021-11-07 01:49:15,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:15,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372500921] [2021-11-07 01:49:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:15,702 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:15,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:15,703 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:15,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:49:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:16,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:49:16,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:16,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:16,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:16,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:16,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:16,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:49:16,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:16,901 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:49:16,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:49:20,384 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:49:20,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:49:27,753 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:49:27,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:49:27,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:27,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:28,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:28,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372500921] [2021-11-07 01:49:28,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372500921] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:28,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:28,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:49:28,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805791836] [2021-11-07 01:49:28,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:49:28,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:28,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:49:28,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:49:28,206 INFO L87 Difference]: Start difference. First operand 226 states and 341 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:33,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:33,809 INFO L93 Difference]: Finished difference Result 594 states and 901 transitions. [2021-11-07 01:50:33,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:50:33,812 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 58 [2021-11-07 01:50:33,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:33,815 INFO L225 Difference]: With dead ends: 594 [2021-11-07 01:50:33,815 INFO L226 Difference]: Without dead ends: 399 [2021-11-07 01:50:33,816 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:50:33,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-07 01:50:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 298. [2021-11-07 01:50:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.4983164983164983) internal successors, (445), 297 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:33,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 445 transitions. [2021-11-07 01:50:33,835 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 445 transitions. Word has length 58 [2021-11-07 01:50:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:33,835 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 445 transitions. [2021-11-07 01:50:33,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:33,836 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 445 transitions. [2021-11-07 01:50:33,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 01:50:33,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:33,838 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:50:33,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:34,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:34,058 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:50:34,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1460613165, now seen corresponding path program 1 times [2021-11-07 01:50:34,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:34,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1661290083] [2021-11-07 01:50:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:34,059 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:34,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:34,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:34,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:50:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:34,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:50:34,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:34,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:50:34,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:50:35,447 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:50:35,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:50:38,932 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:50:38,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:50:46,597 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:50:46,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:50:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:46,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:47,063 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:47,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1661290083] [2021-11-07 01:50:47,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1661290083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:47,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:47,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:50:47,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827577531] [2021-11-07 01:50:47,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:50:47,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:47,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:50:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:50:47,065 INFO L87 Difference]: Start difference. First operand 298 states and 445 transitions. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:26,735 INFO L93 Difference]: Finished difference Result 640 states and 966 transitions. [2021-11-07 01:51:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:51:26,736 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 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 58 [2021-11-07 01:51:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:26,739 INFO L225 Difference]: With dead ends: 640 [2021-11-07 01:51:26,739 INFO L226 Difference]: Without dead ends: 399 [2021-11-07 01:51:26,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:51:26,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-11-07 01:51:26,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 226. [2021-11-07 01:51:26,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.5066666666666666) internal successors, (339), 225 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 339 transitions. [2021-11-07 01:51:26,754 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 339 transitions. Word has length 58 [2021-11-07 01:51:26,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:26,755 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 339 transitions. [2021-11-07 01:51:26,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 339 transitions. [2021-11-07 01:51:26,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:51:26,757 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:26,757 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:51:26,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:51:26,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:26,977 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:51:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash 307994918, now seen corresponding path program 1 times [2021-11-07 01:51:26,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:26,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574252696] [2021-11-07 01:51:26,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:26,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:26,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:26,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:26,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:51:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:28,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:51:28,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:28,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:28,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:28,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:28,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:28,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:51:28,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:51:28,441 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:51:28,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:51:31,775 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:51:31,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:51:38,728 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:51:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:51:38,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:38,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:39,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:39,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574252696] [2021-11-07 01:51:39,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574252696] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:39,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:39,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:51:39,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331789198] [2021-11-07 01:51:39,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:51:39,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:39,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:51:39,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:51:39,232 INFO L87 Difference]: Start difference. First operand 226 states and 339 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:20,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:20,614 INFO L93 Difference]: Finished difference Result 539 states and 814 transitions. [2021-11-07 01:52:20,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:52:20,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:52:20,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:20,621 INFO L225 Difference]: With dead ends: 539 [2021-11-07 01:52:20,621 INFO L226 Difference]: Without dead ends: 334 [2021-11-07 01:52:20,622 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:52:20,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-11-07 01:52:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 240. [2021-11-07 01:52:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.493723849372385) internal successors, (357), 239 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 357 transitions. [2021-11-07 01:52:20,637 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 357 transitions. Word has length 59 [2021-11-07 01:52:20,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:20,637 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 357 transitions. [2021-11-07 01:52:20,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:20,638 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 357 transitions. [2021-11-07 01:52:20,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 01:52:20,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:20,639 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:52:20,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:20,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:20,862 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:52:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:20,862 INFO L85 PathProgramCache]: Analyzing trace with hash 141214081, now seen corresponding path program 1 times [2021-11-07 01:52:20,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:20,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [20006997] [2021-11-07 01:52:20,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:20,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:20,865 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:20,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:52:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:21,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:52:22,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:22,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:22,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:22,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:22,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:52:22,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:22,433 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:52:22,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:52:25,878 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:52:25,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:52:33,077 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:52:33,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:52:33,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:33,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:33,576 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:33,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [20006997] [2021-11-07 01:52:33,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [20006997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:33,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:33,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:52:33,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420182496] [2021-11-07 01:52:33,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:52:33,578 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:33,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:52:33,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:52:33,579 INFO L87 Difference]: Start difference. First operand 240 states and 357 transitions. Second operand has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:19,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:53:19,425 INFO L93 Difference]: Finished difference Result 554 states and 832 transitions. [2021-11-07 01:53:19,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:53:19,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 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 60 [2021-11-07 01:53:19,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:53:19,429 INFO L225 Difference]: With dead ends: 554 [2021-11-07 01:53:19,429 INFO L226 Difference]: Without dead ends: 335 [2021-11-07 01:53:19,430 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:53:19,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-07 01:53:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 242. [2021-11-07 01:53:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.4854771784232366) internal successors, (358), 241 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:19,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 358 transitions. [2021-11-07 01:53:19,445 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 358 transitions. Word has length 60 [2021-11-07 01:53:19,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:53:19,445 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 358 transitions. [2021-11-07 01:53:19,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:53:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 358 transitions. [2021-11-07 01:53:19,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:53:19,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:53:19,447 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:53:19,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:53:19,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:53:19,664 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:53:19,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:53:19,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1939173537, now seen corresponding path program 1 times [2021-11-07 01:53:19,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:53:19,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074842598] [2021-11-07 01:53:19,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:53:19,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:53:19,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:53:19,666 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:53:19,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:53:20,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:53:20,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:53:20,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:53:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:20,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:20,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:20,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:53:20,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:53:21,193 INFO L354 Elim1Store]: treesize reduction 1130, result has 5.7 percent of original size [2021-11-07 01:53:21,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 80 treesize of output 78 [2021-11-07 01:53:24,448 INFO L354 Elim1Store]: treesize reduction 2459, result has 4.9 percent of original size [2021-11-07 01:53:24,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 80 case distinctions, treesize of input 238 treesize of output 174 [2021-11-07 01:53:31,574 INFO L354 Elim1Store]: treesize reduction 792, result has 0.1 percent of original size [2021-11-07 01:53:31,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 183 treesize of output 87 [2021-11-07 01:53:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:31,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:53:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:53:32,091 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:53:32,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074842598] [2021-11-07 01:53:32,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074842598] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:53:32,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:53:32,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:53:32,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611293783] [2021-11-07 01:53:32,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:53:32,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:53:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:53:32,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=26, Unknown=1, NotChecked=0, Total=42 [2021-11-07 01:53:32,094 INFO L87 Difference]: Start difference. First operand 242 states and 358 transitions. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:19,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:19,226 INFO L93 Difference]: Finished difference Result 542 states and 814 transitions. [2021-11-07 01:54:19,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:54:19,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:54:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:19,229 INFO L225 Difference]: With dead ends: 542 [2021-11-07 01:54:19,229 INFO L226 Difference]: Without dead ends: 321 [2021-11-07 01:54:19,230 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=27, Invalid=44, Unknown=1, NotChecked=0, Total=72 [2021-11-07 01:54:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-11-07 01:54:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 220. [2021-11-07 01:54:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.4794520547945205) internal successors, (324), 219 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 324 transitions. [2021-11-07 01:54:19,243 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 324 transitions. Word has length 61 [2021-11-07 01:54:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:19,244 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 324 transitions. [2021-11-07 01:54:19,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 324 transitions. [2021-11-07 01:54:19,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 01:54:19,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:19,246 INFO L513 BasicCegarLoop]: trace histogram [2, 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] [2021-11-07 01:54:19,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:19,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:19,460 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1682794951, now seen corresponding path program 1 times [2021-11-07 01:54:19,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:19,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782682262] [2021-11-07 01:54:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:19,461 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:19,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:19,465 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:19,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:54:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:54:20,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:20,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:20,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:20,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:20,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:20,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:20,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:21,176 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-07 01:54:21,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 7 case distinctions, treesize of input 56 treesize of output 74 [2021-11-07 01:54:22,425 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:54:22,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 107 treesize of output 35 [2021-11-07 01:54:22,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:22,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:54:22,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:22,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782682262] [2021-11-07 01:54:22,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782682262] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:22,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:22,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:54:22,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207717521] [2021-11-07 01:54:22,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:54:22,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:22,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:54:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:54:22,863 INFO L87 Difference]: Start difference. First operand 220 states and 324 transitions. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:40,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:54:40,800 INFO L93 Difference]: Finished difference Result 448 states and 665 transitions. [2021-11-07 01:54:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:54:40,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 01:54:40,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:54:40,804 INFO L225 Difference]: With dead ends: 448 [2021-11-07 01:54:40,804 INFO L226 Difference]: Without dead ends: 249 [2021-11-07 01:54:40,805 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:54:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-07 01:54:40,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 242. [2021-11-07 01:54:40,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 1.4688796680497926) internal successors, (354), 241 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:40,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 354 transitions. [2021-11-07 01:54:40,816 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 354 transitions. Word has length 61 [2021-11-07 01:54:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:54:40,816 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 354 transitions. [2021-11-07 01:54:40,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:54:40,817 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 354 transitions. [2021-11-07 01:54:40,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 01:54:40,818 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:54:40,818 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 01:54:40,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:54:41,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:54:41,032 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:54:41,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:54:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1249670907, now seen corresponding path program 1 times [2021-11-07 01:54:41,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:54:41,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5842314] [2021-11-07 01:54:41,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:54:41,034 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:54:41,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:54:41,035 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:54:41,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:54:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:54:42,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:54:42,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:54:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:54:42,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:42,269 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:54:42,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:54:42,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:42,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:42,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:54:42,664 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:54:42,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:54:44,996 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:54:44,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:54:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:45,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:54:45,431 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:54:45,431 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:54:45,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5842314] [2021-11-07 01:54:45,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5842314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:54:45,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:54:45,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:54:45,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898822852] [2021-11-07 01:54:45,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:54:45,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:54:45,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:54:45,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:54:45,433 INFO L87 Difference]: Start difference. First operand 242 states and 354 transitions. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:55:25,724 INFO L93 Difference]: Finished difference Result 689 states and 1022 transitions. [2021-11-07 01:55:25,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:55:25,726 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 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 83 [2021-11-07 01:55:25,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:55:25,729 INFO L225 Difference]: With dead ends: 689 [2021-11-07 01:55:25,729 INFO L226 Difference]: Without dead ends: 468 [2021-11-07 01:55:25,730 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:55:25,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-11-07 01:55:25,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 296. [2021-11-07 01:55:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.494915254237288) internal successors, (441), 295 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:25,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 441 transitions. [2021-11-07 01:55:25,746 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 441 transitions. Word has length 83 [2021-11-07 01:55:25,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:55:25,747 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 441 transitions. [2021-11-07 01:55:25,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:55:25,747 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 441 transitions. [2021-11-07 01:55:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 01:55:25,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:55:25,749 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-07 01:55:25,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:55:25,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:55:25,964 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:55:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:55:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash -287501208, now seen corresponding path program 1 times [2021-11-07 01:55:25,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:55:25,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516525808] [2021-11-07 01:55:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:55:25,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:55:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:55:25,966 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:55:25,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:55:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:55:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:55:27,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:55:27,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:27,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:27,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:27,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:55:27,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:55:27,284 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:55:27,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:55:27,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:55:27,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:55:27,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:55:27,714 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:55:27,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:55:30,235 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:55:30,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:55:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:55:30,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:55:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:55:30,719 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:55:30,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [516525808] [2021-11-07 01:55:30,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [516525808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:55:30,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:55:30,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:55:30,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954332767] [2021-11-07 01:55:30,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:55:30,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:55:30,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:55:30,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:55:30,721 INFO L87 Difference]: Start difference. First operand 296 states and 441 transitions. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:11,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:11,383 INFO L93 Difference]: Finished difference Result 756 states and 1139 transitions. [2021-11-07 01:56:11,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:56:11,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 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 01:56:11,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:11,387 INFO L225 Difference]: With dead ends: 756 [2021-11-07 01:56:11,388 INFO L226 Difference]: Without dead ends: 481 [2021-11-07 01:56:11,388 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:56:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-11-07 01:56:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 318. [2021-11-07 01:56:11,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.526813880126183) internal successors, (484), 317 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:11,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 484 transitions. [2021-11-07 01:56:11,402 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 484 transitions. Word has length 84 [2021-11-07 01:56:11,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:11,403 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 484 transitions. [2021-11-07 01:56:11,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:11,403 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 484 transitions. [2021-11-07 01:56:11,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 01:56:11,405 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:11,405 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-07 01:56:11,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:11,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:11,621 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:56:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1349457633, now seen corresponding path program 1 times [2021-11-07 01:56:11,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:11,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2082242503] [2021-11-07 01:56:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:11,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:11,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:11,623 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:11,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:56:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:12,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:12,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:13,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:13,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,177 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:56:13,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:56:13,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:13,579 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:56:13,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:56:15,329 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:56:15,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:56:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:15,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:15,936 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:15,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2082242503] [2021-11-07 01:56:15,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2082242503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:15,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:15,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:56:15,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065696982] [2021-11-07 01:56:15,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:56:15,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:56:15,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:56:15,938 INFO L87 Difference]: Start difference. First operand 318 states and 484 transitions. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:56:50,842 INFO L93 Difference]: Finished difference Result 818 states and 1245 transitions. [2021-11-07 01:56:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:56:50,843 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-11-07 01:56:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:56:50,845 INFO L225 Difference]: With dead ends: 818 [2021-11-07 01:56:50,845 INFO L226 Difference]: Without dead ends: 521 [2021-11-07 01:56:50,846 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:56:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-11-07 01:56:50,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 348. [2021-11-07 01:56:50,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.5244956772334295) internal successors, (529), 347 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 529 transitions. [2021-11-07 01:56:50,871 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 529 transitions. Word has length 110 [2021-11-07 01:56:50,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:56:50,872 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 529 transitions. [2021-11-07 01:56:50,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:56:50,873 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 529 transitions. [2021-11-07 01:56:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-07 01:56:50,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:56:50,874 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-07 01:56:50,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:56:51,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:56:51,093 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:56:51,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:56:51,094 INFO L85 PathProgramCache]: Analyzing trace with hash 646919107, now seen corresponding path program 1 times [2021-11-07 01:56:51,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:56:51,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815449474] [2021-11-07 01:56:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:56:51,095 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:56:51,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:56:51,097 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:56:51,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:56:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:56:52,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:56:52,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:56:52,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:52,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:52,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:52,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:52,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:56:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:52,697 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:56:52,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:56:52,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:52,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:52,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:56:53,070 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:56:53,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:56:54,873 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:56:54,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:56:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:55,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:56:55,413 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:56:55,413 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:56:55,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815449474] [2021-11-07 01:56:55,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815449474] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:56:55,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:56:55,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:56:55,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391260574] [2021-11-07 01:56:55,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:56:55,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:56:55,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:56:55,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:56:55,415 INFO L87 Difference]: Start difference. First operand 348 states and 529 transitions. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:27,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:27,430 INFO L93 Difference]: Finished difference Result 836 states and 1267 transitions. [2021-11-07 01:57:27,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:27,433 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 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 111 [2021-11-07 01:57:27,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:27,436 INFO L225 Difference]: With dead ends: 836 [2021-11-07 01:57:27,436 INFO L226 Difference]: Without dead ends: 509 [2021-11-07 01:57:27,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-07 01:57:27,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 348. [2021-11-07 01:57:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 1.5187319884726225) internal successors, (527), 347 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:27,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 527 transitions. [2021-11-07 01:57:27,451 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 527 transitions. Word has length 111 [2021-11-07 01:57:27,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:27,452 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 527 transitions. [2021-11-07 01:57:27,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:27,452 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 527 transitions. [2021-11-07 01:57:27,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 01:57:27,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:27,454 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 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] [2021-11-07 01:57:27,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:57:27,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:27,673 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:27,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:27,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2055153251, now seen corresponding path program 1 times [2021-11-07 01:57:27,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:27,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [794350904] [2021-11-07 01:57:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:27,675 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:27,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:27,676 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:27,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:57:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:57:29,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:57:29,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:57:29,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:29,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:29,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:29,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:29,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:57:29,480 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:29,551 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:57:29,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:57:29,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:29,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:29,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:57:29,882 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:57:29,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89 [2021-11-07 01:57:31,509 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-07 01:57:31,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 38 [2021-11-07 01:57:31,625 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:31,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:57:32,046 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-07 01:57:32,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:57:32,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [794350904] [2021-11-07 01:57:32,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [794350904] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:57:32,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:57:32,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-07 01:57:32,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257025324] [2021-11-07 01:57:32,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 01:57:32,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:57:32,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 01:57:32,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:57:32,048 INFO L87 Difference]: Start difference. First operand 348 states and 527 transitions. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:58,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:57:58,772 INFO L93 Difference]: Finished difference Result 878 states and 1335 transitions. [2021-11-07 01:57:58,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:57:58,773 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 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 112 [2021-11-07 01:57:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:57:58,776 INFO L225 Difference]: With dead ends: 878 [2021-11-07 01:57:58,776 INFO L226 Difference]: Without dead ends: 551 [2021-11-07 01:57:58,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:57:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-07 01:57:58,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 404. [2021-11-07 01:57:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.5161290322580645) internal successors, (611), 403 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 611 transitions. [2021-11-07 01:57:58,795 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 611 transitions. Word has length 112 [2021-11-07 01:57:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:57:58,796 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 611 transitions. [2021-11-07 01:57:58,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:57:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 611 transitions. [2021-11-07 01:57:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 01:57:58,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:57:58,798 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-07 01:57:58,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:57:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:57:59,012 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 01:57:59,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:57:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash 31547282, now seen corresponding path program 1 times [2021-11-07 01:57:59,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:57:59,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707929941] [2021-11-07 01:57:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:57:59,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:57:59,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:57:59,015 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:57:59,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_502b6b1a-bb8c-462b-b04f-a6068a9ffc73/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:58:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:58:00,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:58:00,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:58:00,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:00,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:00,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:00,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-07 01:58:00,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:58:00,853 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-07 01:58:00,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 40 [2021-11-07 01:58:00,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:58:00,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:58:00,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:58:01,328 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-07 01:58:01,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 13 case distinctions, treesize of input 72 treesize of output 89