./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs --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 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:46:55,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:46:55,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:46:55,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:46:55,929 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:46:55,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:46:55,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:46:55,942 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:46:55,945 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:46:55,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:46:55,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:46:55,954 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:46:55,955 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:46:55,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:46:55,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:46:55,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:46:55,967 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:46:55,968 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:46:55,971 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:46:55,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:46:55,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:46:55,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:46:55,987 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:46:55,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:46:55,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:46:55,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:46:55,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:46:55,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:46:55,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:46:56,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:46:56,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:46:56,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:46:56,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:46:56,005 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:46:56,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:46:56,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:46:56,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:46:56,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:46:56,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:46:56,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:46:56,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:46:56,011 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 15:46:56,055 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:46:56,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:46:56,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:46:56,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:46:56,058 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:46:56,058 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:46:56,059 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:46:56,059 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 15:46:56,065 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:46:56,066 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:46:56,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 15:46:56,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 15:46:56,067 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:46:56,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 15:46:56,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 15:46:56,068 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 15:46:56,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:46:56,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:46:56,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 15:46:56,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:46:56,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:46:56,070 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:46:56,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:46:56,071 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:46:56,071 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:46:56,071 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:46:56,071 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:46:56,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:46:56,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:46:56,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:46:56,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:46:56,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:46:56,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:46:56,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:46:56,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:46:56,075 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 15:46:56,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 15:46:56,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:46:56,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:46:56,076 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:46:56,077 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_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2021-11-19 15:46:56,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:46:56,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:46:56,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:46:56,397 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:46:56,398 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:46:56,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-19 15:46:56,493 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data/8efec62d6/c9d842f87b674620a383c4aeb277144d/FLAG4894c916e [2021-11-19 15:46:57,154 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:46:57,154 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-19 15:46:57,182 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data/8efec62d6/c9d842f87b674620a383c4aeb277144d/FLAG4894c916e [2021-11-19 15:46:57,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data/8efec62d6/c9d842f87b674620a383c4aeb277144d [2021-11-19 15:46:57,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:46:57,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:46:57,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:46:57,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:46:57,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:46:57,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:46:57" (1/1) ... [2021-11-19 15:46:57,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@181f6140 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:57, skipping insertion in model container [2021-11-19 15:46:57,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:46:57" (1/1) ... [2021-11-19 15:46:57,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:46:57,405 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:46:57,917 WARN L230 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_c65c36ac-02a7-45f4-bd5d-ded78a662722/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-19 15:46:57,927 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:46:57,942 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) [2021-11-19 15:46:57,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@55e4220d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:46:57, skipping insertion in model container [2021-11-19 15:46:57,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:46:57,944 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-19 15:46:57,946 INFO L158 Benchmark]: Toolchain (without parser) took 612.19ms. Allocated memory is still 100.7MB. Free memory was 63.5MB in the beginning and 65.5MB in the end (delta: -2.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 15:46:57,947 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 100.7MB. Free memory was 71.8MB in the beginning and 71.8MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 15:46:57,948 INFO L158 Benchmark]: CACSL2BoogieTranslator took 609.22ms. Allocated memory is still 100.7MB. Free memory was 63.2MB in the beginning and 65.5MB in the end (delta: -2.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 15:46:57,950 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 100.7MB. Free memory was 71.8MB in the beginning and 71.8MB in the end (delta: 31.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 609.22ms. Allocated memory is still 100.7MB. Free memory was 63.2MB in the beginning and 65.5MB in the end (delta: -2.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * 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_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs --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 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 15:47:00,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 15:47:00,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 15:47:00,309 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 15:47:00,309 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 15:47:00,311 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 15:47:00,313 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 15:47:00,316 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 15:47:00,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 15:47:00,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 15:47:00,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 15:47:00,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 15:47:00,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 15:47:00,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 15:47:00,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 15:47:00,329 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 15:47:00,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 15:47:00,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 15:47:00,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 15:47:00,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 15:47:00,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 15:47:00,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 15:47:00,343 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 15:47:00,344 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 15:47:00,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 15:47:00,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 15:47:00,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 15:47:00,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 15:47:00,352 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 15:47:00,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 15:47:00,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 15:47:00,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 15:47:00,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 15:47:00,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 15:47:00,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 15:47:00,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 15:47:00,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 15:47:00,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 15:47:00,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 15:47:00,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 15:47:00,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 15:47:00,372 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-19 15:47:00,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 15:47:00,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 15:47:00,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 15:47:00,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 15:47:00,414 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 15:47:00,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 15:47:00,414 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 15:47:00,415 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 15:47:00,415 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 15:47:00,415 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 15:47:00,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 15:47:00,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 15:47:00,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 15:47:00,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 15:47:00,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 15:47:00,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 15:47:00,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 15:47:00,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 15:47:00,419 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-19 15:47:00,419 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-19 15:47:00,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 15:47:00,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 15:47:00,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 15:47:00,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 15:47:00,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 15:47:00,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 15:47:00,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 15:47:00,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:47:00,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 15:47:00,422 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 15:47:00,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 15:47:00,422 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-19 15:47:00,423 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-19 15:47:00,423 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 15:47:00,423 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 15:47:00,423 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 15:47:00,424 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_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7b66a12741a993de3de45354c2fb746af1f1a44b9ceb94bb607376650a8088af [2021-11-19 15:47:00,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 15:47:00,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 15:47:00,863 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 15:47:00,864 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 15:47:00,867 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 15:47:00,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-19 15:47:00,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data/b7c389b64/6787d36eef1e437da889f78ff0abc39d/FLAGb11bcc40f [2021-11-19 15:47:01,776 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 15:47:01,777 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c [2021-11-19 15:47:01,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data/b7c389b64/6787d36eef1e437da889f78ff0abc39d/FLAGb11bcc40f [2021-11-19 15:47:01,926 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/data/b7c389b64/6787d36eef1e437da889f78ff0abc39d [2021-11-19 15:47:01,929 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 15:47:01,930 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 15:47:01,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 15:47:01,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 15:47:01,944 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 15:47:01,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:47:01" (1/1) ... [2021-11-19 15:47:01,947 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ab9bb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:01, skipping insertion in model container [2021-11-19 15:47:01,947 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 03:47:01" (1/1) ... [2021-11-19 15:47:01,955 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 15:47:02,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:47:02,459 WARN L230 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_c65c36ac-02a7-45f4-bd5d-ded78a662722/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-19 15:47:02,483 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:47:02,513 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-19 15:47:02,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 15:47:02,737 WARN L230 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_c65c36ac-02a7-45f4-bd5d-ded78a662722/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-19 15:47:02,742 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:47:02,752 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 15:47:02,935 WARN L230 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_c65c36ac-02a7-45f4-bd5d-ded78a662722/sv-benchmarks/c/openssl/s3_srvr.blast.09.i.cil-1.c[74369,74382] [2021-11-19 15:47:02,941 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 15:47:02,969 INFO L208 MainTranslator]: Completed translation [2021-11-19 15:47:02,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02 WrapperNode [2021-11-19 15:47:02,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 15:47:02,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 15:47:02,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 15:47:02,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 15:47:02,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,025 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,094 INFO L137 Inliner]: procedures = 36, calls = 223, calls flagged for inlining = 7, calls inlined = 3, statements flattened = 761 [2021-11-19 15:47:03,095 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 15:47:03,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 15:47:03,097 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 15:47:03,097 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 15:47:03,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,131 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,204 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 15:47:03,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 15:47:03,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 15:47:03,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 15:47:03,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (1/1) ... [2021-11-19 15:47:03,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 15:47:03,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 15:47:03,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 15:47:03,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 15:47:03,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 15:47:03,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-19 15:47:03,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-19 15:47:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 15:47:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-19 15:47:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-19 15:47:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 15:47:03,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 15:47:03,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 15:47:03,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-19 15:47:03,526 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 15:47:03,528 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 15:47:03,546 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-19 15:47:13,401 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-19 15:47:13,401 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-19 15:47:13,401 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 15:47:13,410 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 15:47:13,411 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 15:47:13,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:47:13 BoogieIcfgContainer [2021-11-19 15:47:13,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 15:47:13,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 15:47:13,430 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 15:47:13,433 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 15:47:13,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 03:47:01" (1/3) ... [2021-11-19 15:47:13,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c5fbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:47:13, skipping insertion in model container [2021-11-19 15:47:13,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 03:47:02" (2/3) ... [2021-11-19 15:47:13,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51c5fbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 03:47:13, skipping insertion in model container [2021-11-19 15:47:13,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 03:47:13" (3/3) ... [2021-11-19 15:47:13,444 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr.blast.09.i.cil-1.c [2021-11-19 15:47:13,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 15:47:13,453 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 15:47:13,522 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 15:47:13,538 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 [2021-11-19 15:47:13,538 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 15:47:13,563 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) [2021-11-19 15:47:13,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-19 15:47:13,576 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:13,577 INFO L514 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] [2021-11-19 15:47:13,578 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:13,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash -442385418, now seen corresponding path program 1 times [2021-11-19 15:47:13,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:13,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2075043303] [2021-11-19 15:47:13,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:13,602 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:13,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:13,609 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:13,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-19 15:47:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:13,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:47:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:47:14,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:14,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:47:14,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:14,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2075043303] [2021-11-19 15:47:14,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2075043303] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:14,409 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:14,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:47:14,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156317113] [2021-11-19 15:47:14,413 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:14,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:47:14,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:14,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:47:14,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:14,484 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 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) [2021-11-19 15:47:14,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:14,736 INFO L93 Difference]: Finished difference Result 566 states and 965 transitions. [2021-11-19 15:47:14,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:47:14,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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 37 [2021-11-19 15:47:14,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:14,767 INFO L225 Difference]: With dead ends: 566 [2021-11-19 15:47:14,767 INFO L226 Difference]: Without dead ends: 387 [2021-11-19 15:47:14,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:14,779 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 402 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:14,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 670 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 15:47:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-11-19 15:47:14,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 385. [2021-11-19 15:47:14,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 1.5286458333333333) internal successors, (587), 384 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 587 transitions. [2021-11-19 15:47:14,855 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 587 transitions. Word has length 37 [2021-11-19 15:47:14,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:14,856 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 587 transitions. [2021-11-19 15:47:14,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 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) [2021-11-19 15:47:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 587 transitions. [2021-11-19 15:47:14,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-19 15:47:14,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:14,861 INFO L514 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] [2021-11-19 15:47:14,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-19 15:47:15,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:15,074 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:15,075 INFO L85 PathProgramCache]: Analyzing trace with hash 746604405, now seen corresponding path program 1 times [2021-11-19 15:47:15,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:15,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1757300106] [2021-11-19 15:47:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:15,077 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:15,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:15,086 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:15,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-19 15:47:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:15,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:47:15,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:47:15,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 15:47:15,898 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:15,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1757300106] [2021-11-19 15:47:15,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1757300106] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:15,906 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:15,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:47:15,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837325624] [2021-11-19 15:47:15,907 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:15,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:47:15,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:15,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:47:15,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:15,912 INFO L87 Difference]: Start difference. First operand 385 states and 587 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:16,566 INFO L93 Difference]: Finished difference Result 882 states and 1357 transitions. [2021-11-19 15:47:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:47:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-19 15:47:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:16,574 INFO L225 Difference]: With dead ends: 882 [2021-11-19 15:47:16,574 INFO L226 Difference]: Without dead ends: 631 [2021-11-19 15:47:16,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:16,578 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 305 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:16,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 722 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-19 15:47:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-11-19 15:47:16,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 629. [2021-11-19 15:47:16,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.5222929936305734) internal successors, (956), 628 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 956 transitions. [2021-11-19 15:47:16,620 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 956 transitions. Word has length 60 [2021-11-19 15:47:16,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:16,625 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 956 transitions. [2021-11-19 15:47:16,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:16,625 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 956 transitions. [2021-11-19 15:47:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 15:47:16,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:16,641 INFO L514 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:16,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:16,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:16,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1546935351, now seen corresponding path program 1 times [2021-11-19 15:47:16,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:16,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1864920412] [2021-11-19 15:47:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:16,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:16,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:16,873 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:16,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-19 15:47:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:17,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:47:17,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:47:17,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 15:47:17,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:17,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1864920412] [2021-11-19 15:47:17,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1864920412] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:17,968 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:17,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:47:17,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111574289] [2021-11-19 15:47:17,969 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:17,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:47:17,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:17,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:47:17,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:17,971 INFO L87 Difference]: Start difference. First operand 629 states and 956 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:18,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:18,675 INFO L93 Difference]: Finished difference Result 1368 states and 2093 transitions. [2021-11-19 15:47:18,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:47:18,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 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 121 [2021-11-19 15:47:18,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:18,683 INFO L225 Difference]: With dead ends: 1368 [2021-11-19 15:47:18,683 INFO L226 Difference]: Without dead ends: 873 [2021-11-19 15:47:18,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:18,691 INFO L933 BasicCegarLoop]: 363 mSDtfsCounter, 289 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:18,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 727 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 15:47:18,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-11-19 15:47:18,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 873. [2021-11-19 15:47:18,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 1.518348623853211) internal successors, (1324), 872 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1324 transitions. [2021-11-19 15:47:18,743 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1324 transitions. Word has length 121 [2021-11-19 15:47:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:18,745 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 1324 transitions. [2021-11-19 15:47:18,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1324 transitions. [2021-11-19 15:47:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-19 15:47:18,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:18,757 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:18,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:18,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:18,978 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:18,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:18,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1117044971, now seen corresponding path program 1 times [2021-11-19 15:47:18,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:18,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419240594] [2021-11-19 15:47:18,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:18,980 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:18,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:18,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:19,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-19 15:47:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 15:47:19,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:47:19,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-19 15:47:20,100 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:20,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419240594] [2021-11-19 15:47:20,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419240594] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:20,101 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:20,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-19 15:47:20,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338625079] [2021-11-19 15:47:20,101 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:20,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 15:47:20,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 15:47:20,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:20,103 INFO L87 Difference]: Start difference. First operand 873 states and 1324 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:20,982 INFO L93 Difference]: Finished difference Result 1860 states and 2832 transitions. [2021-11-19 15:47:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:47:20,983 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 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 150 [2021-11-19 15:47:20,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:20,996 INFO L225 Difference]: With dead ends: 1860 [2021-11-19 15:47:20,997 INFO L226 Difference]: Without dead ends: 1121 [2021-11-19 15:47:20,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-19 15:47:21,001 INFO L933 BasicCegarLoop]: 365 mSDtfsCounter, 296 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:21,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 729 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 15:47:21,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-19 15:47:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2021-11-19 15:47:21,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5133928571428572) internal successors, (1695), 1120 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:21,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1695 transitions. [2021-11-19 15:47:21,072 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1695 transitions. Word has length 150 [2021-11-19 15:47:21,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:21,078 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1695 transitions. [2021-11-19 15:47:21,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 4 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1695 transitions. [2021-11-19 15:47:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 15:47:21,083 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:21,083 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:21,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:21,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:21,305 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:21,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2092203957, now seen corresponding path program 1 times [2021-11-19 15:47:21,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:21,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560966259] [2021-11-19 15:47:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:21,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:21,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:21,310 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:21,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-19 15:47:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-19 15:47:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:22,657 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 [2021-11-19 15:47:22,667 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 [2021-11-19 15:47:22,753 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:22,756 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 15:47:22,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:22,767 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 336 [2021-11-19 15:47:22,785 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 [2021-11-19 15:47:23,238 INFO L354 Elim1Store]: treesize reduction 1607, result has 2.8 percent of original size [2021-11-19 15:47:23,239 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 1289 treesize of output 1241 [2021-11-19 15:47:23,362 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:23,364 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 221 [2021-11-19 15:47:23,373 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 [2021-11-19 15:47:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,485 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 [2021-11-19 15:47:23,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,515 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 [2021-11-19 15:47:23,629 INFO L354 Elim1Store]: treesize reduction 340, result has 2.6 percent of original size [2021-11-19 15:47:23,629 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 [2021-11-19 15:47:23,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:23,662 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 [2021-11-19 15:47:23,693 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 [2021-11-19 15:47:23,699 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 [2021-11-19 15:47:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 15:47:24,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:24,692 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:24,696 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 181 [2021-11-19 15:47:24,701 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:24,709 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-11-19 15:47:24,856 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:24,859 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 393 [2021-11-19 15:47:24,865 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:24,868 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 510 [2021-11-19 15:47:24,898 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:24,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 687 [2021-11-19 15:47:24,916 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:24,921 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 744 [2021-11-19 15:47:24,940 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:24,943 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 861 [2021-11-19 15:47:24,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 15:47:24,971 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1038 [2021-11-19 15:47:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2021-11-19 15:47:25,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:25,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560966259] [2021-11-19 15:47:25,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560966259] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:25,507 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:25,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-19 15:47:25,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79814628] [2021-11-19 15:47:25,510 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:25,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 15:47:25,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:25,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 15:47:25,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:47:25,513 INFO L87 Difference]: Start difference. First operand 1121 states and 1695 transitions. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:27,538 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:33,205 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:47:34,571 INFO L93 Difference]: Finished difference Result 2239 states and 3386 transitions. [2021-11-19 15:47:34,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 15:47:34,573 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 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 174 [2021-11-19 15:47:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:47:34,580 INFO L225 Difference]: With dead ends: 2239 [2021-11-19 15:47:34,581 INFO L226 Difference]: Without dead ends: 1121 [2021-11-19 15:47:34,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 339 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:47:34,583 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 10 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:47:34,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 876 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 114 Invalid, 1 Unknown, 58 Unchecked, 9.0s Time] [2021-11-19 15:47:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2021-11-19 15:47:34,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1121. [2021-11-19 15:47:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.5125) internal successors, (1694), 1120 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1694 transitions. [2021-11-19 15:47:34,628 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1694 transitions. Word has length 174 [2021-11-19 15:47:34,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:47:34,629 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1694 transitions. [2021-11-19 15:47:34,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1694 transitions. [2021-11-19 15:47:34,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 15:47:34,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:47:34,634 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:47:34,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-19 15:47:34,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:47:34,865 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:47:34,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:47:34,865 INFO L85 PathProgramCache]: Analyzing trace with hash 834302729, now seen corresponding path program 1 times [2021-11-19 15:47:34,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:47:34,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1389686986] [2021-11-19 15:47:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:47:34,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:47:34,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:47:34,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:47:34,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-19 15:47:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:47:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 15:47:35,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:47:36,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:36,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:36,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:36,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:36,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:47:36,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:47:36,150 INFO L354 Elim1Store]: treesize reduction 188, result has 13.8 percent of original size [2021-11-19 15:47:36,151 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 [2021-11-19 15:47:36,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:47:36,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:47:36,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:47:36,668 INFO L354 Elim1Store]: treesize reduction 850, result has 7.0 percent of original size [2021-11-19 15:47:36,668 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 [2021-11-19 15:47:38,121 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:47:38,121 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 [2021-11-19 15:47:38,446 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 15:47:38,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:47:39,044 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-19 15:47:39,044 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:47:39,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1389686986] [2021-11-19 15:47:39,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1389686986] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:47:39,045 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:47:39,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 4] imperfect sequences [] total 7 [2021-11-19 15:47:39,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307716774] [2021-11-19 15:47:39,045 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:47:39,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 15:47:39,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:47:39,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 15:47:39,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 15:47:39,047 INFO L87 Difference]: Start difference. First operand 1121 states and 1694 transitions. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:47:41,073 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:43,083 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:47,209 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:49,271 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:55,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:56,588 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:47:58,981 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:02,925 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:06,725 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:08,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:18,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:23,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:23,972 INFO L93 Difference]: Finished difference Result 4230 states and 6418 transitions. [2021-11-19 15:48:23,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 15:48:23,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 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 174 [2021-11-19 15:48:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:23,996 INFO L225 Difference]: With dead ends: 4230 [2021-11-19 15:48:23,996 INFO L226 Difference]: Without dead ends: 3119 [2021-11-19 15:48:23,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 340 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-19 15:48:23,999 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 377 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 86 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 43.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:24,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 793 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 732 Invalid, 3 Unknown, 0 Unchecked, 44.7s Time] [2021-11-19 15:48:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3119 states. [2021-11-19 15:48:24,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3119 to 1345. [2021-11-19 15:48:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1345 states, 1344 states have (on average 1.5476190476190477) internal successors, (2080), 1344 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 2080 transitions. [2021-11-19 15:48:24,100 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 2080 transitions. Word has length 174 [2021-11-19 15:48:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:24,100 INFO L470 AbstractCegarLoop]: Abstraction has 1345 states and 2080 transitions. [2021-11-19 15:48:24,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 2080 transitions. [2021-11-19 15:48:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-19 15:48:24,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:24,105 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:24,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:24,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:24,329 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:24,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:24,329 INFO L85 PathProgramCache]: Analyzing trace with hash 289430155, now seen corresponding path program 1 times [2021-11-19 15:48:24,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:24,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265263749] [2021-11-19 15:48:24,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:24,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:24,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:24,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:24,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-19 15:48:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:25,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:25,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:25,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:25,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:25,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:25,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:25,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:25,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:25,919 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:48:25,920 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 [2021-11-19 15:48:27,391 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:48:27,391 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 [2021-11-19 15:48:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:48:27,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2021-11-19 15:48:28,032 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:28,032 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265263749] [2021-11-19 15:48:28,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265263749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:28,032 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:28,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-19 15:48:28,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507985601] [2021-11-19 15:48:28,032 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:28,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 15:48:28,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:28,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 15:48:28,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 15:48:28,034 INFO L87 Difference]: Start difference. First operand 1345 states and 2080 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:30,051 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:32,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:36,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:37,901 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:40,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:48,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:48:48,547 INFO L93 Difference]: Finished difference Result 3252 states and 5030 transitions. [2021-11-19 15:48:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 15:48:48,554 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 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 174 [2021-11-19 15:48:48,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:48:48,568 INFO L225 Difference]: With dead ends: 3252 [2021-11-19 15:48:48,568 INFO L226 Difference]: Without dead ends: 1917 [2021-11-19 15:48:48,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 342 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:48,572 INFO L933 BasicCegarLoop]: 255 mSDtfsCounter, 110 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:48:48,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 615 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 1 Unknown, 0 Unchecked, 20.3s Time] [2021-11-19 15:48:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-11-19 15:48:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1597. [2021-11-19 15:48:48,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1597 states, 1596 states have (on average 1.5795739348370927) internal successors, (2521), 1596 states have internal predecessors, (2521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:48,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1597 states to 1597 states and 2521 transitions. [2021-11-19 15:48:48,676 INFO L78 Accepts]: Start accepts. Automaton has 1597 states and 2521 transitions. Word has length 174 [2021-11-19 15:48:48,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:48:48,676 INFO L470 AbstractCegarLoop]: Abstraction has 1597 states and 2521 transitions. [2021-11-19 15:48:48,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1597 states and 2521 transitions. [2021-11-19 15:48:48,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-19 15:48:48,682 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:48:48,683 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:48:48,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-19 15:48:48,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:48:48,897 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:48:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:48:48,898 INFO L85 PathProgramCache]: Analyzing trace with hash -975340285, now seen corresponding path program 1 times [2021-11-19 15:48:48,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:48:48,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427159081] [2021-11-19 15:48:48,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:48:48,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:48:48,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:48:48,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:48:48,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-19 15:48:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:48:50,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:48:50,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:48:50,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:48:50,195 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:50,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:50,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:50,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:50,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:48:50,578 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:48:50,579 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 [2021-11-19 15:48:51,406 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:48:51,406 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 [2021-11-19 15:48:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:48:51,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:48:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 199 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:48:52,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:48:52,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427159081] [2021-11-19 15:48:52,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427159081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:48:52,191 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:48:52,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:48:52,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477165174] [2021-11-19 15:48:52,192 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:48:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:48:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:48:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:48:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:48:52,194 INFO L87 Difference]: Start difference. First operand 1597 states and 2521 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:48:54,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:48:59,444 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:05,897 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:11,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:21,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:21,059 INFO L93 Difference]: Finished difference Result 4741 states and 7399 transitions. [2021-11-19 15:49:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:49:21,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 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 187 [2021-11-19 15:49:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:21,089 INFO L225 Difference]: With dead ends: 4741 [2021-11-19 15:49:21,089 INFO L226 Difference]: Without dead ends: 3154 [2021-11-19 15:49:21,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:49:21,093 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 214 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 67 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.6s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:21,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 553 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 465 Invalid, 2 Unknown, 0 Unchecked, 28.6s Time] [2021-11-19 15:49:21,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2021-11-19 15:49:21,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 1869. [2021-11-19 15:49:21,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5813704496788008) internal successors, (2954), 1868 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2954 transitions. [2021-11-19 15:49:21,229 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2954 transitions. Word has length 187 [2021-11-19 15:49:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:21,230 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2954 transitions. [2021-11-19 15:49:21,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:21,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2954 transitions. [2021-11-19 15:49:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 15:49:21,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:21,236 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:21,266 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:21,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:49:21,462 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:21,463 INFO L85 PathProgramCache]: Analyzing trace with hash 988941552, now seen corresponding path program 1 times [2021-11-19 15:49:21,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:21,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1157394911] [2021-11-19 15:49:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:21,464 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:21,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:21,465 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:21,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-19 15:49:22,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:49:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:49:22,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:49:22,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:49:22,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:49:22,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:49:22,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:49:22,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:49:22,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:49:22,902 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:49:22,902 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 [2021-11-19 15:49:23,298 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:49:23,299 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 [2021-11-19 15:49:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:49:23,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:49:23,998 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 169 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:49:23,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:49:23,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1157394911] [2021-11-19 15:49:23,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1157394911] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:49:23,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:49:23,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:49:23,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100287894] [2021-11-19 15:49:23,999 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:49:24,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:49:24,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:49:24,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:49:24,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:49:24,001 INFO L87 Difference]: Start difference. First operand 1869 states and 2954 transitions. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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) [2021-11-19 15:49:26,031 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:28,040 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:31,986 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:36,315 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:41,199 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:43,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:45,807 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:50,324 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:54,391 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:49:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:49:59,371 INFO L93 Difference]: Finished difference Result 4923 states and 7653 transitions. [2021-11-19 15:49:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:49:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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 188 [2021-11-19 15:49:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:49:59,391 INFO L225 Difference]: With dead ends: 4923 [2021-11-19 15:49:59,391 INFO L226 Difference]: Without dead ends: 3064 [2021-11-19 15:49:59,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:49:59,395 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 223 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 69 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.1s IncrementalHoareTripleChecker+Time [2021-11-19 15:49:59,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 530 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 471 Invalid, 3 Unknown, 0 Unchecked, 35.1s Time] [2021-11-19 15:49:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2021-11-19 15:49:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 1869. [2021-11-19 15:49:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1869 states, 1868 states have (on average 1.5626338329764453) internal successors, (2919), 1868 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:49:59,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1869 states to 1869 states and 2919 transitions. [2021-11-19 15:49:59,532 INFO L78 Accepts]: Start accepts. Automaton has 1869 states and 2919 transitions. Word has length 188 [2021-11-19 15:49:59,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:49:59,532 INFO L470 AbstractCegarLoop]: Abstraction has 1869 states and 2919 transitions. [2021-11-19 15:49:59,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 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) [2021-11-19 15:49:59,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1869 states and 2919 transitions. [2021-11-19 15:49:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 15:49:59,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:49:59,539 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:49:59,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-19 15:49:59,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:49:59,761 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:49:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:49:59,762 INFO L85 PathProgramCache]: Analyzing trace with hash -617202468, now seen corresponding path program 1 times [2021-11-19 15:49:59,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:49:59,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614883795] [2021-11-19 15:49:59,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:49:59,764 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:49:59,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:49:59,765 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:49:59,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-19 15:50:00,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:00,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:50:00,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:01,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:01,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:01,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:01,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:01,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:01,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:01,545 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:50:01,546 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 [2021-11-19 15:50:02,043 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:50:02,043 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 [2021-11-19 15:50:02,268 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:50:02,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:50:02,764 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:02,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614883795] [2021-11-19 15:50:02,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614883795] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:02,765 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:02,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:50:02,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807430311] [2021-11-19 15:50:02,765 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:02,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:02,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:02,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:50:02,767 INFO L87 Difference]: Start difference. First operand 1869 states and 2919 transitions. Second operand has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:04,798 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:07,278 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:08,906 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:23,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:24,476 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:25,894 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:39,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:39,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:50:39,270 INFO L93 Difference]: Finished difference Result 5115 states and 7903 transitions. [2021-11-19 15:50:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:50:39,272 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 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 188 [2021-11-19 15:50:39,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:50:39,290 INFO L225 Difference]: With dead ends: 5115 [2021-11-19 15:50:39,290 INFO L226 Difference]: Without dead ends: 3256 [2021-11-19 15:50:39,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:50:39,294 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 219 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:50:39,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 785 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 622 Invalid, 1 Unknown, 0 Unchecked, 36.3s Time] [2021-11-19 15:50:39,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-11-19 15:50:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 1965. [2021-11-19 15:50:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1965 states, 1964 states have (on average 1.5417515274949083) internal successors, (3028), 1964 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:39,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1965 states to 1965 states and 3028 transitions. [2021-11-19 15:50:39,433 INFO L78 Accepts]: Start accepts. Automaton has 1965 states and 3028 transitions. Word has length 188 [2021-11-19 15:50:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:50:39,434 INFO L470 AbstractCegarLoop]: Abstraction has 1965 states and 3028 transitions. [2021-11-19 15:50:39,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.666666666666668) internal successors, (130), 6 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:39,434 INFO L276 IsEmpty]: Start isEmpty. Operand 1965 states and 3028 transitions. [2021-11-19 15:50:39,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 15:50:39,442 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:50:39,442 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:50:39,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-19 15:50:39,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:50:39,666 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:50:39,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:50:39,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1565412453, now seen corresponding path program 1 times [2021-11-19 15:50:39,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:50:39,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2068308178] [2021-11-19 15:50:39,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:50:39,667 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:50:39,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:50:39,668 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:50:39,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-19 15:50:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:50:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:50:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:50:40,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:50:40,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:40,693 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:40,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:40,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:40,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:50:41,066 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:50:41,067 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 [2021-11-19 15:50:41,849 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:50:41,850 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 [2021-11-19 15:50:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:50:42,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:50:42,504 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 211 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:50:42,504 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:50:42,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2068308178] [2021-11-19 15:50:42,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2068308178] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:50:42,504 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:50:42,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:50:42,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197243752] [2021-11-19 15:50:42,508 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:50:42,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:50:42,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:50:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:50:42,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:50:42,510 INFO L87 Difference]: Start difference. First operand 1965 states and 3028 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:50:44,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:55,297 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:56,447 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:50:59,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:02,455 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:06,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:15,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:15,455 INFO L93 Difference]: Finished difference Result 5097 states and 7783 transitions. [2021-11-19 15:51:15,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:51:15,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 188 [2021-11-19 15:51:15,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:15,473 INFO L225 Difference]: With dead ends: 5097 [2021-11-19 15:51:15,473 INFO L226 Difference]: Without dead ends: 3142 [2021-11-19 15:51:15,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:51:15,477 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 206 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 68 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:15,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 524 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 458 Invalid, 2 Unknown, 0 Unchecked, 32.7s Time] [2021-11-19 15:51:15,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-11-19 15:51:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 1981. [2021-11-19 15:51:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.5323232323232323) internal successors, (3034), 1980 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:51:15,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3034 transitions. [2021-11-19 15:51:15,619 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3034 transitions. Word has length 188 [2021-11-19 15:51:15,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:15,620 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3034 transitions. [2021-11-19 15:51:15,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:51:15,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3034 transitions. [2021-11-19 15:51:15,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-19 15:51:15,626 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:15,626 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:15,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:15,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:15,841 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:15,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1437107291, now seen corresponding path program 1 times [2021-11-19 15:51:15,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:15,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090986446] [2021-11-19 15:51:15,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:15,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:15,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:15,844 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:15,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-19 15:51:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:16,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:51:16,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:16,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:16,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:16,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:16,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:16,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:16,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:17,187 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:51:17,188 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 [2021-11-19 15:51:17,862 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:51:17,862 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 [2021-11-19 15:51:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:51:18,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:51:18,552 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:18,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090986446] [2021-11-19 15:51:18,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090986446] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:18,553 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:18,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:51:18,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800841083] [2021-11-19 15:51:18,553 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:18,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:51:18,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:18,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:51:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:51:18,555 INFO L87 Difference]: Start difference. First operand 1981 states and 3034 transitions. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:51:20,593 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:25,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:28,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:30,198 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:32,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:34,481 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:36,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:51:47,276 INFO L93 Difference]: Finished difference Result 5095 states and 7745 transitions. [2021-11-19 15:51:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:51:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 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 188 [2021-11-19 15:51:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:51:47,295 INFO L225 Difference]: With dead ends: 5095 [2021-11-19 15:51:47,295 INFO L226 Difference]: Without dead ends: 3124 [2021-11-19 15:51:47,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:51:47,299 INFO L933 BasicCegarLoop]: 159 mSDtfsCounter, 206 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 67 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:51:47,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 528 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 462 Invalid, 1 Unknown, 0 Unchecked, 28.5s Time] [2021-11-19 15:51:47,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3124 states. [2021-11-19 15:51:47,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3124 to 1981. [2021-11-19 15:51:47,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1981 states, 1980 states have (on average 1.5191919191919192) internal successors, (3008), 1980 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:51:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1981 states to 1981 states and 3008 transitions. [2021-11-19 15:51:47,449 INFO L78 Accepts]: Start accepts. Automaton has 1981 states and 3008 transitions. Word has length 188 [2021-11-19 15:51:47,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:51:47,449 INFO L470 AbstractCegarLoop]: Abstraction has 1981 states and 3008 transitions. [2021-11-19 15:51:47,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:51:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1981 states and 3008 transitions. [2021-11-19 15:51:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2021-11-19 15:51:47,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:51:47,462 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:51:47,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-19 15:51:47,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:51:47,683 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:51:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:51:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1627778118, now seen corresponding path program 1 times [2021-11-19 15:51:47,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:51:47,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1435089250] [2021-11-19 15:51:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:51:47,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:51:47,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:51:47,685 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:51:47,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-19 15:51:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:51:48,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:51:48,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:51:48,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:51:48,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:48,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:51:49,230 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:51:49,230 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 [2021-11-19 15:51:49,706 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:51:49,706 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 [2021-11-19 15:51:49,895 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:51:49,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:51:50,305 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 181 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:51:50,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:51:50,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1435089250] [2021-11-19 15:51:50,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1435089250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:51:50,307 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:51:50,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:51:50,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92873546] [2021-11-19 15:51:50,308 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:51:50,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:51:50,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:51:50,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:51:50,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:51:50,309 INFO L87 Difference]: Start difference. First operand 1981 states and 3008 transitions. Second operand has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:51:52,332 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:54,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:51:57,345 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:02,786 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:05,361 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:09,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:24,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:52:25,468 INFO L93 Difference]: Finished difference Result 5191 states and 7853 transitions. [2021-11-19 15:52:25,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:52:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 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 189 [2021-11-19 15:52:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:52:25,478 INFO L225 Difference]: With dead ends: 5191 [2021-11-19 15:52:25,478 INFO L226 Difference]: Without dead ends: 3220 [2021-11-19 15:52:25,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:52:25,481 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 211 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 63 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 34.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:52:25,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 779 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 34.9s Time] [2021-11-19 15:52:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-19 15:52:25,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1989. [2021-11-19 15:52:25,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1989 states, 1988 states have (on average 1.5035211267605635) internal successors, (2989), 1988 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:52:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1989 states to 1989 states and 2989 transitions. [2021-11-19 15:52:25,632 INFO L78 Accepts]: Start accepts. Automaton has 1989 states and 2989 transitions. Word has length 189 [2021-11-19 15:52:25,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:52:25,633 INFO L470 AbstractCegarLoop]: Abstraction has 1989 states and 2989 transitions. [2021-11-19 15:52:25,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.0) internal successors, (132), 6 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:52:25,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1989 states and 2989 transitions. [2021-11-19 15:52:25,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-19 15:52:25,638 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:52:25,638 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:52:25,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-19 15:52:25,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:52:25,861 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:52:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:52:25,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1146228617, now seen corresponding path program 1 times [2021-11-19 15:52:25,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:52:25,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655868268] [2021-11-19 15:52:25,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:52:25,863 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:52:25,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:52:25,864 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:52:25,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-19 15:52:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:52:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:52:26,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:52:27,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:52:27,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:52:27,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:52:27,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:52:27,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:52:27,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:52:27,512 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:52:27,513 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 [2021-11-19 15:52:28,090 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:52:28,090 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 [2021-11-19 15:52:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:52:28,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:52:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:52:28,789 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:52:28,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655868268] [2021-11-19 15:52:28,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655868268] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:52:28,789 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:52:28,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:52:28,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763206757] [2021-11-19 15:52:28,790 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:52:28,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:52:28,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:52:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:52:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:52:28,791 INFO L87 Difference]: Start difference. First operand 1989 states and 2989 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:52:30,824 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:32,838 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:34,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:40,971 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:43,178 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:52:46,130 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:02,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:04,115 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:06,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:53:06,262 INFO L93 Difference]: Finished difference Result 5199 states and 7799 transitions. [2021-11-19 15:53:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:53:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 190 [2021-11-19 15:53:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:53:06,271 INFO L225 Difference]: With dead ends: 5199 [2021-11-19 15:53:06,271 INFO L226 Difference]: Without dead ends: 3220 [2021-11-19 15:53:06,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:53:06,275 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 207 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 63 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.2s IncrementalHoareTripleChecker+Time [2021-11-19 15:53:06,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 776 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 37.2s Time] [2021-11-19 15:53:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3220 states. [2021-11-19 15:53:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3220 to 1997. [2021-11-19 15:53:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 1.4879759519038076) internal successors, (2970), 1996 states have internal predecessors, (2970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:53:06,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 2970 transitions. [2021-11-19 15:53:06,420 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 2970 transitions. Word has length 190 [2021-11-19 15:53:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:53:06,420 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 2970 transitions. [2021-11-19 15:53:06,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:53:06,420 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 2970 transitions. [2021-11-19 15:53:06,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 15:53:06,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:53:06,425 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:53:06,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-19 15:53:06,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:53:06,650 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:53:06,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:53:06,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1653439691, now seen corresponding path program 1 times [2021-11-19 15:53:06,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:53:06,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382349808] [2021-11-19 15:53:06,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:53:06,652 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:53:06,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:53:06,653 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:53:06,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-19 15:53:07,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:53:07,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:53:07,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:08,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:08,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:08,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:08,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:08,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:08,541 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:53:08,542 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 [2021-11-19 15:53:09,168 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:53:09,169 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 [2021-11-19 15:53:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:53:09,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:09,828 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:53:09,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:53:09,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382349808] [2021-11-19 15:53:09,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382349808] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:53:09,829 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:53:09,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:53:09,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496136926] [2021-11-19 15:53:09,829 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:53:09,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:53:09,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:53:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:53:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:53:09,830 INFO L87 Difference]: Start difference. First operand 1997 states and 2970 transitions. Second operand has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:53:11,847 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:18,792 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:20,355 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:21,410 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:25,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:27,032 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:28,629 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:32,946 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:34,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:39,784 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:53:45,515 INFO L93 Difference]: Finished difference Result 5027 states and 7487 transitions. [2021-11-19 15:53:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:53:45,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 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 191 [2021-11-19 15:53:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:53:45,523 INFO L225 Difference]: With dead ends: 5027 [2021-11-19 15:53:45,523 INFO L226 Difference]: Without dead ends: 3040 [2021-11-19 15:53:45,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:53:45,526 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 199 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 60 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.4s IncrementalHoareTripleChecker+Time [2021-11-19 15:53:45,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 704 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 577 Invalid, 1 Unknown, 0 Unchecked, 35.4s Time] [2021-11-19 15:53:45,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2021-11-19 15:53:45,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 1997. [2021-11-19 15:53:45,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1997 states, 1996 states have (on average 1.470440881763527) internal successors, (2935), 1996 states have internal predecessors, (2935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:53:45,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1997 states to 1997 states and 2935 transitions. [2021-11-19 15:53:45,673 INFO L78 Accepts]: Start accepts. Automaton has 1997 states and 2935 transitions. Word has length 191 [2021-11-19 15:53:45,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:53:45,673 INFO L470 AbstractCegarLoop]: Abstraction has 1997 states and 2935 transitions. [2021-11-19 15:53:45,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.666666666666668) internal successors, (136), 6 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:53:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1997 states and 2935 transitions. [2021-11-19 15:53:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-19 15:53:45,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:53:45,679 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:53:45,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-19 15:53:45,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:53:45,893 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:53:45,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:53:45,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1981897227, now seen corresponding path program 1 times [2021-11-19 15:53:45,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:53:45,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [309592021] [2021-11-19 15:53:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:53:45,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:53:45,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:53:45,897 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:53:45,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-19 15:53:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:53:46,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:53:46,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:53:46,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:53:46,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:46,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:46,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:46,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:46,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:53:47,374 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:53:47,375 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 [2021-11-19 15:53:48,293 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:53:48,294 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 [2021-11-19 15:53:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:53:48,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:53:48,951 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 220 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:53:48,952 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:53:48,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [309592021] [2021-11-19 15:53:48,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [309592021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:53:48,952 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:53:48,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:53:48,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86315322] [2021-11-19 15:53:48,952 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:53:48,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:53:48,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:53:48,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:53:48,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:53:48,953 INFO L87 Difference]: Start difference. First operand 1997 states and 2935 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:53:50,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:53:56,722 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:02,236 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:06,338 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:14,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:19,755 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:24,263 INFO L93 Difference]: Finished difference Result 5020 states and 7398 transitions. [2021-11-19 15:54:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:54:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 191 [2021-11-19 15:54:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:24,274 INFO L225 Difference]: With dead ends: 5020 [2021-11-19 15:54:24,274 INFO L226 Difference]: Without dead ends: 3256 [2021-11-19 15:54:24,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:54:24,277 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 181 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 41 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.0s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:24,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 1201 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 659 Invalid, 2 Unknown, 0 Unchecked, 35.0s Time] [2021-11-19 15:54:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3256 states. [2021-11-19 15:54:24,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3256 to 2176. [2021-11-19 15:54:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 1.4482758620689655) internal successors, (3150), 2175 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:54:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 3150 transitions. [2021-11-19 15:54:24,427 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 3150 transitions. Word has length 191 [2021-11-19 15:54:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:24,427 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 3150 transitions. [2021-11-19 15:54:24,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:54:24,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 3150 transitions. [2021-11-19 15:54:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-19 15:54:24,432 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:24,432 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:54:24,458 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-19 15:54:24,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:54:24,654 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:54:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash 468579752, now seen corresponding path program 1 times [2021-11-19 15:54:24,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:24,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [249082250] [2021-11-19 15:54:24,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:54:24,656 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:24,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:24,657 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:24,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-19 15:54:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:54:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:54:25,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:25,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:25,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:25,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:25,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:25,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:25,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:26,069 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:54:26,069 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 [2021-11-19 15:54:26,948 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:54:26,948 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 [2021-11-19 15:54:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:54:27,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:54:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:54:27,658 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:54:27,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [249082250] [2021-11-19 15:54:27,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [249082250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:54:27,659 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:54:27,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:54:27,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530076135] [2021-11-19 15:54:27,659 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:54:27,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:54:27,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:54:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:54:27,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:54:27,661 INFO L87 Difference]: Start difference. First operand 2176 states and 3150 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:54:29,684 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:36,602 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:40,362 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:42,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:43,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:54,146 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:54:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:54:57,470 INFO L93 Difference]: Finished difference Result 5190 states and 7575 transitions. [2021-11-19 15:54:57,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:54:57,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 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 192 [2021-11-19 15:54:57,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:54:57,477 INFO L225 Difference]: With dead ends: 5190 [2021-11-19 15:54:57,477 INFO L226 Difference]: Without dead ends: 3267 [2021-11-19 15:54:57,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:54:57,480 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 186 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2021-11-19 15:54:57,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 551 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 457 Invalid, 1 Unknown, 0 Unchecked, 29.5s Time] [2021-11-19 15:54:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2021-11-19 15:54:57,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 2204. [2021-11-19 15:54:57,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2204 states, 2203 states have (on average 1.4389468906037222) internal successors, (3170), 2203 states have internal predecessors, (3170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:54:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2204 states to 2204 states and 3170 transitions. [2021-11-19 15:54:57,689 INFO L78 Accepts]: Start accepts. Automaton has 2204 states and 3170 transitions. Word has length 192 [2021-11-19 15:54:57,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:54:57,690 INFO L470 AbstractCegarLoop]: Abstraction has 2204 states and 3170 transitions. [2021-11-19 15:54:57,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 6 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:54:57,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2204 states and 3170 transitions. [2021-11-19 15:54:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-19 15:54:57,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:54:57,702 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:54:57,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-19 15:54:57,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:54:57,902 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:54:57,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:54:57,903 INFO L85 PathProgramCache]: Analyzing trace with hash -2055877882, now seen corresponding path program 1 times [2021-11-19 15:54:57,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:54:57,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [435445231] [2021-11-19 15:54:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:54:57,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:54:57,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:54:57,905 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:54:57,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-19 15:54:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:54:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:54:58,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:54:58,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:54:58,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:58,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:58,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:58,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:58,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:54:59,196 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:54:59,196 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 [2021-11-19 15:55:00,136 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:55:00,137 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 [2021-11-19 15:55:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:55:00,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:55:00,765 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:55:00,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [435445231] [2021-11-19 15:55:00,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [435445231] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:55:00,766 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:55:00,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:55:00,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004229567] [2021-11-19 15:55:00,766 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:55:00,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:55:00,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:55:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:55:00,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:55:00,768 INFO L87 Difference]: Start difference. First operand 2204 states and 3170 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:55:02,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:04,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:11,256 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:16,835 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:25,500 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:26,624 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:55:30,740 INFO L93 Difference]: Finished difference Result 5359 states and 7750 transitions. [2021-11-19 15:55:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:55:30,741 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 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 193 [2021-11-19 15:55:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:55:30,749 INFO L225 Difference]: With dead ends: 5359 [2021-11-19 15:55:30,750 INFO L226 Difference]: Without dead ends: 3421 [2021-11-19 15:55:30,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:55:30,753 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 181 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 57 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:55:30,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 551 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 451 Invalid, 2 Unknown, 0 Unchecked, 29.7s Time] [2021-11-19 15:55:30,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3421 states. [2021-11-19 15:55:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3421 to 2401. [2021-11-19 15:55:30,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 2400 states have (on average 1.4179166666666667) internal successors, (3403), 2400 states have internal predecessors, (3403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:55:30,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 3403 transitions. [2021-11-19 15:55:30,934 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 3403 transitions. Word has length 193 [2021-11-19 15:55:30,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:55:30,935 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 3403 transitions. [2021-11-19 15:55:30,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:55:30,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 3403 transitions. [2021-11-19 15:55:30,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-19 15:55:30,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:55:30,940 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:55:30,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-19 15:55:31,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:55:31,155 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:55:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:55:31,156 INFO L85 PathProgramCache]: Analyzing trace with hash 967910484, now seen corresponding path program 1 times [2021-11-19 15:55:31,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:55:31,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551900950] [2021-11-19 15:55:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:55:31,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:55:31,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:55:31,158 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:55:31,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-19 15:55:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:55:31,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:55:31,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:55:32,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:55:32,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:55:32,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:55:32,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:55:32,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:55:32,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:55:32,445 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:55:32,445 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 [2021-11-19 15:55:33,554 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:55:33,554 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 [2021-11-19 15:55:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:55:33,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:55:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 237 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:55:34,316 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:55:34,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551900950] [2021-11-19 15:55:34,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551900950] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:55:34,317 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:55:34,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:55:34,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888604908] [2021-11-19 15:55:34,317 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:55:34,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:55:34,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:55:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:55:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:55:34,319 INFO L87 Difference]: Start difference. First operand 2401 states and 3403 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:55:36,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:46,708 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:49,794 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:55:57,344 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:00,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:56:00,910 INFO L93 Difference]: Finished difference Result 5990 states and 8541 transitions. [2021-11-19 15:56:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:56:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 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 196 [2021-11-19 15:56:00,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:56:00,931 INFO L225 Difference]: With dead ends: 5990 [2021-11-19 15:56:00,931 INFO L226 Difference]: Without dead ends: 3610 [2021-11-19 15:56:00,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:56:00,935 INFO L933 BasicCegarLoop]: 179 mSDtfsCounter, 178 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 55 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.3s IncrementalHoareTripleChecker+Time [2021-11-19 15:56:00,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 590 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 452 Invalid, 2 Unknown, 0 Unchecked, 26.3s Time] [2021-11-19 15:56:00,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3610 states. [2021-11-19 15:56:01,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3610 to 2607. [2021-11-19 15:56:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2607 states, 2606 states have (on average 1.3986953184957789) internal successors, (3645), 2606 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:56:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2607 states to 2607 states and 3645 transitions. [2021-11-19 15:56:01,151 INFO L78 Accepts]: Start accepts. Automaton has 2607 states and 3645 transitions. Word has length 196 [2021-11-19 15:56:01,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:56:01,151 INFO L470 AbstractCegarLoop]: Abstraction has 2607 states and 3645 transitions. [2021-11-19 15:56:01,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:56:01,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2607 states and 3645 transitions. [2021-11-19 15:56:01,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 15:56:01,172 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:56:01,172 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:56:01,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:01,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:56:01,393 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:56:01,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:56:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1968533010, now seen corresponding path program 1 times [2021-11-19 15:56:01,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:56:01,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061698548] [2021-11-19 15:56:01,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:01,395 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:56:01,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:56:01,397 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:56:01,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-19 15:56:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:02,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:56:02,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:02,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:02,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:02,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:02,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:02,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:02,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:02,763 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:56:02,763 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 [2021-11-19 15:56:03,852 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:56:03,852 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 [2021-11-19 15:56:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:56:04,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:56:04,574 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:56:04,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061698548] [2021-11-19 15:56:04,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061698548] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:56:04,574 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:56:04,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:56:04,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173713435] [2021-11-19 15:56:04,575 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:56:04,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:56:04,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:56:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:56:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:56:04,576 INFO L87 Difference]: Start difference. First operand 2607 states and 3645 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:56:06,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:10,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:13,232 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:17,181 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:31,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:56:31,597 INFO L93 Difference]: Finished difference Result 6144 states and 8683 transitions. [2021-11-19 15:56:31,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:56:31,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 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 197 [2021-11-19 15:56:31,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:56:31,603 INFO L225 Difference]: With dead ends: 6144 [2021-11-19 15:56:31,604 INFO L226 Difference]: Without dead ends: 3558 [2021-11-19 15:56:31,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:56:31,607 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 171 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 59 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.7s IncrementalHoareTripleChecker+Time [2021-11-19 15:56:31,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 550 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 442 Invalid, 1 Unknown, 0 Unchecked, 26.7s Time] [2021-11-19 15:56:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3558 states. [2021-11-19 15:56:31,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3558 to 2615. [2021-11-19 15:56:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 1.3905891354246365) internal successors, (3635), 2614 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:56:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3635 transitions. [2021-11-19 15:56:31,815 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3635 transitions. Word has length 197 [2021-11-19 15:56:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:56:31,816 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 3635 transitions. [2021-11-19 15:56:31,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:56:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3635 transitions. [2021-11-19 15:56:31,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-19 15:56:31,821 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:56:31,821 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:56:31,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-19 15:56:32,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:56:32,044 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:56:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:56:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash -522942010, now seen corresponding path program 1 times [2021-11-19 15:56:32,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:56:32,046 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172161344] [2021-11-19 15:56:32,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:56:32,046 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:56:32,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:56:32,047 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:56:32,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-19 15:56:32,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:56:33,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:56:33,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:56:33,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:56:33,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:33,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:33,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:56:33,649 INFO L354 Elim1Store]: treesize reduction 1134, result has 5.3 percent of original size [2021-11-19 15:56:33,650 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 [2021-11-19 15:56:34,880 INFO L354 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2021-11-19 15:56:34,880 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 [2021-11-19 15:56:35,091 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:56:35,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 15:56:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2021-11-19 15:56:35,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-19 15:56:35,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172161344] [2021-11-19 15:56:35,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172161344] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-19 15:56:35,540 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-19 15:56:35,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-19 15:56:35,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775971293] [2021-11-19 15:56:35,540 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-19 15:56:35,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 15:56:35,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-19 15:56:35,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 15:56:35,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 15:56:35,542 INFO L87 Difference]: Start difference. First operand 2615 states and 3635 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:56:37,571 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:39,582 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:46,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:52,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:56:56,778 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:57:01,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-19 15:57:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 15:57:04,760 INFO L93 Difference]: Finished difference Result 6103 states and 8583 transitions. [2021-11-19 15:57:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 15:57:04,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 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 197 [2021-11-19 15:57:04,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 15:57:04,764 INFO L225 Difference]: With dead ends: 6103 [2021-11-19 15:57:04,764 INFO L226 Difference]: Without dead ends: 3509 [2021-11-19 15:57:04,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-19 15:57:04,777 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 159 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 58 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.9s IncrementalHoareTripleChecker+Time [2021-11-19 15:57:04,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 554 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 439 Invalid, 2 Unknown, 0 Unchecked, 28.9s Time] [2021-11-19 15:57:04,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2021-11-19 15:57:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 2632. [2021-11-19 15:57:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 1.387685290763968) internal successors, (3651), 2631 states have internal predecessors, (3651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:57:04,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 3651 transitions. [2021-11-19 15:57:04,993 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 3651 transitions. Word has length 197 [2021-11-19 15:57:04,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 15:57:04,993 INFO L470 AbstractCegarLoop]: Abstraction has 2632 states and 3651 transitions. [2021-11-19 15:57:04,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 6 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-19 15:57:04,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 3651 transitions. [2021-11-19 15:57:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-19 15:57:04,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 15:57:04,999 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 15:57:05,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-19 15:57:05,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 [2021-11-19 15:57:05,210 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 15:57:05,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 15:57:05,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1162661829, now seen corresponding path program 1 times [2021-11-19 15:57:05,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-19 15:57:05,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [428642845] [2021-11-19 15:57:05,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 15:57:05,212 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-19 15:57:05,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat [2021-11-19 15:57:05,213 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-19 15:57:05,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c65c36ac-02a7-45f4-bd5d-ded78a662722/bin/utaipan-UbGMyvGFUs/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-19 15:57:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 15:57:06,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 15:57:06,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 15:57:06,288 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 162 treesize of output 138 [2021-11-19 15:57:06,292 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 138 treesize of output 90 [2021-11-19 15:57:06,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:57:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:57:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:57:06,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:57:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 15:57:06,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:57:06,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 15:57:06,305 INFO L190 IndexEqualityManager]: detected not equals via solver