./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:47:33,804 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:47:33,807 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:47:33,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:47:33,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:47:33,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:47:33,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:47:33,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:47:33,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:47:33,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:47:33,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:47:33,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:47:33,916 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:47:33,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:47:33,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:47:33,922 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:47:33,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:47:33,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:47:33,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:47:33,939 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:47:33,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:47:33,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:47:33,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:47:33,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:47:33,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:47:33,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:47:33,964 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:47:33,967 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:47:33,968 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:47:33,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:47:33,971 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:47:33,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:47:33,974 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:47:33,976 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:47:33,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:47:33,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:47:33,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:47:33,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:47:33,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:47:33,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:47:33,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:47:33,985 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 01:47:34,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:47:34,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:47:34,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:47:34,057 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:47:34,057 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:47:34,057 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:47:34,058 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:47:34,058 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:47:34,058 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:47:34,059 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:47:34,060 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:47:34,060 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:47:34,061 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:47:34,061 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:47:34,061 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:47:34,062 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:47:34,063 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:47:34,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:47:34,063 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:47:34,064 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:47:34,064 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:47:34,064 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:47:34,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:47:34,065 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:47:34,065 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:47:34,065 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:47:34,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:47:34,068 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:47:34,068 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:47:34,068 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:47:34,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:47:34,069 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:47:34,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:34,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:47:34,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:47:34,070 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:47:34,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:47:34,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:47:34,071 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:47:34,071 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_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e [2021-11-07 01:47:34,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:47:34,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:47:34,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:47:34,513 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:47:34,514 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:47:34,515 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-07 01:47:34,598 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data/213082e91/46628924c766423fa881d39a90e07ca9/FLAG47caad745 [2021-11-07 01:47:35,378 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:47:35,381 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-07 01:47:35,404 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data/213082e91/46628924c766423fa881d39a90e07ca9/FLAG47caad745 [2021-11-07 01:47:35,565 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data/213082e91/46628924c766423fa881d39a90e07ca9 [2021-11-07 01:47:35,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:47:35,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:47:35,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:35,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:47:35,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:47:35,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:35" (1/1) ... [2021-11-07 01:47:35,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66b23bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:35, skipping insertion in model container [2021-11-07 01:47:35,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:35" (1/1) ... [2021-11-07 01:47:35,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:47:35,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:47:36,225 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-07 01:47:36,525 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:36,537 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 01:47:36,538 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2f1fdd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:36, skipping insertion in model container [2021-11-07 01:47:36,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:36,539 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:47:36,542 INFO L168 Benchmark]: Toolchain (without parser) took 960.29 ms. Allocated memory is still 127.9 MB. Free memory was 106.0 MB in the beginning and 79.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:36,543 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 56.2 MB in the beginning and 56.1 MB in the end (delta: 108.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:47:36,544 INFO L168 Benchmark]: CACSL2BoogieTranslator took 957.18 ms. Allocated memory is still 127.9 MB. Free memory was 106.0 MB in the beginning and 79.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-11-07 01:47:36,546 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 81.8 MB. Free memory was 56.2 MB in the beginning and 56.1 MB in the end (delta: 108.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 957.18 ms. Allocated memory is still 127.9 MB. Free memory was 106.0 MB in the beginning and 79.4 MB in the end (delta: 26.7 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: 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_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:47:39,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:47:39,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:47:39,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:47:39,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:47:39,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:47:39,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:47:39,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:47:39,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:47:39,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:47:39,434 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:47:39,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:47:39,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:47:39,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:47:39,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:47:39,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:47:39,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:47:39,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:47:39,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:47:39,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:47:39,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:47:39,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:47:39,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:47:39,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:47:39,465 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:47:39,465 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:47:39,466 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:47:39,467 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:47:39,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:47:39,470 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:47:39,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:47:39,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:47:39,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:47:39,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:47:39,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:47:39,477 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:47:39,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:47:39,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:47:39,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:47:39,488 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:47:39,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:47:39,491 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 01:47:39,528 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:47:39,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:47:39,530 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:47:39,531 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:47:39,531 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:47:39,532 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:47:39,532 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:47:39,533 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:47:39,534 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:47:39,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 01:47:39,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 01:47:39,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:47:39,537 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:47:39,537 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 01:47:39,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:47:39,538 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:47:39,538 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:47:39,538 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 01:47:39,539 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 01:47:39,539 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 01:47:39,539 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:47:39,540 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:47:39,540 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:47:39,540 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:47:39,540 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:47:39,541 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:47:39,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:47:39,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:47:39,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:47:39,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:39,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:47:39,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:47:39,543 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:47:39,543 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:47:39,544 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:47:39,544 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:47:39,544 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_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce6a3162e09155ad765d255c42023f1cbec9d995c66c63f43c14fadd8640484e [2021-11-07 01:47:39,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:47:40,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:47:40,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:47:40,034 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:47:40,035 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:47:40,037 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-07 01:47:40,145 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data/3df6d8fc7/69cc8f5b6fb945a391ce9b46305d9a17/FLAGf5a677db5 [2021-11-07 01:47:41,013 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:47:41,014 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i [2021-11-07 01:47:41,047 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data/3df6d8fc7/69cc8f5b6fb945a391ce9b46305d9a17/FLAGf5a677db5 [2021-11-07 01:47:41,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/data/3df6d8fc7/69cc8f5b6fb945a391ce9b46305d9a17 [2021-11-07 01:47:41,140 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:47:41,142 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:47:41,144 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:41,144 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:47:41,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:47:41,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:41" (1/1) ... [2021-11-07 01:47:41,166 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b5f5609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:41, skipping insertion in model container [2021-11-07 01:47:41,166 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:47:41" (1/1) ... [2021-11-07 01:47:41,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:47:41,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:47:41,952 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-07 01:47:42,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:42,375 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:47:42,403 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:47:42,442 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-07 01:47:42,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:42,683 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:47:42,753 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test10-1.i[33022,33035] [2021-11-07 01:47:42,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:47:42,917 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:47:42,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42 WrapperNode [2021-11-07 01:47:42,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:47:42,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:47:42,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:47:42,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:47:42,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:42,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:47:43,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:47:43,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:47:43,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:47:43,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,307 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:47:43,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:47:43,384 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:47:43,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:47:43,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (1/1) ... [2021-11-07 01:47:43,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:47:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:47:43,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:47:43,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:47:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 01:47:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 01:47:43,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 01:47:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 01:47:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:47:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 01:47:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 01:47:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 01:47:43,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 01:47:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:47:43,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:47:43,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:47:56,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:47:56,456 INFO L299 CfgBuilder]: Removed 207 assume(true) statements. [2021-11-07 01:47:56,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:56 BoogieIcfgContainer [2021-11-07 01:47:56,464 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:47:56,466 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:47:56,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:47:56,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:47:56,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:47:41" (1/3) ... [2021-11-07 01:47:56,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2532a52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:47:56, skipping insertion in model container [2021-11-07 01:47:56,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:47:42" (2/3) ... [2021-11-07 01:47:56,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2532a52d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:47:56, skipping insertion in model container [2021-11-07 01:47:56,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:47:56" (3/3) ... [2021-11-07 01:47:56,475 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test10-1.i [2021-11-07 01:47:56,482 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:47:56,482 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1005 error locations. [2021-11-07 01:47:56,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:47:56,544 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 01:47:56,544 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1005 error locations. [2021-11-07 01:47:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand has 2123 states, 1117 states have (on average 2.188003581020591) internal successors, (2444), 2122 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:47:56,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:47:56,616 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:47:56,617 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:47:56,618 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:47:56,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:47:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 01:47:56,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:47:56,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722471108] [2021-11-07 01:47:56,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:47:56,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:47:56,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:47:56,647 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:47:56,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:47:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:47:56,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:47:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:47:56,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:47:56,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:56,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:47:57,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:47:57,017 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:47:57,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722471108] [2021-11-07 01:47:57,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722471108] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:47:57,019 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:47:57,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:47:57,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621017197] [2021-11-07 01:47:57,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:47:57,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:47:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:47:57,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:47:57,109 INFO L87 Difference]: Start difference. First operand has 2123 states, 1117 states have (on average 2.188003581020591) internal successors, (2444), 2122 states have internal predecessors, (2444), 0 states have call successors, (0), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:02,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:02,375 INFO L93 Difference]: Finished difference Result 2630 states and 2802 transitions. [2021-11-07 01:48:02,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:02,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2021-11-07 01:48:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:02,417 INFO L225 Difference]: With dead ends: 2630 [2021-11-07 01:48:02,418 INFO L226 Difference]: Without dead ends: 2628 [2021-11-07 01:48:02,419 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2628 states. [2021-11-07 01:48:02,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2628 to 2271. [2021-11-07 01:48:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2271 states, 1289 states have (on average 2.017843289371606) internal successors, (2601), 2270 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2271 states to 2271 states and 2601 transitions. [2021-11-07 01:48:02,600 INFO L78 Accepts]: Start accepts. Automaton has 2271 states and 2601 transitions. Word has length 3 [2021-11-07 01:48:02,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:02,601 INFO L470 AbstractCegarLoop]: Abstraction has 2271 states and 2601 transitions. [2021-11-07 01:48:02,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:02,602 INFO L276 IsEmpty]: Start isEmpty. Operand 2271 states and 2601 transitions. [2021-11-07 01:48:02,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 01:48:02,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:02,603 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 01:48:02,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-07 01:48:02,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:02,821 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:02,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:02,822 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 01:48:02,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:02,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045693632] [2021-11-07 01:48:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:02,824 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:02,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:02,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:02,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:48:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:03,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:03,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:03,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:48:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:03,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:03,187 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:03,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045693632] [2021-11-07 01:48:03,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045693632] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:03,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:03,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:48:03,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193758579] [2021-11-07 01:48:03,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:03,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:03,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:03,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:03,201 INFO L87 Difference]: Start difference. First operand 2271 states and 2601 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:16,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:16,293 INFO L93 Difference]: Finished difference Result 3440 states and 3882 transitions. [2021-11-07 01:48:16,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:16,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 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 3 [2021-11-07 01:48:16,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:16,320 INFO L225 Difference]: With dead ends: 3440 [2021-11-07 01:48:16,321 INFO L226 Difference]: Without dead ends: 3440 [2021-11-07 01:48:16,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3440 states. [2021-11-07 01:48:16,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3440 to 2435. [2021-11-07 01:48:16,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2435 states, 1465 states have (on average 2.0088737201365188) internal successors, (2943), 2434 states have internal predecessors, (2943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2435 states to 2435 states and 2943 transitions. [2021-11-07 01:48:16,442 INFO L78 Accepts]: Start accepts. Automaton has 2435 states and 2943 transitions. Word has length 3 [2021-11-07 01:48:16,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:16,442 INFO L470 AbstractCegarLoop]: Abstraction has 2435 states and 2943 transitions. [2021-11-07 01:48:16,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:16,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2435 states and 2943 transitions. [2021-11-07 01:48:16,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:48:16,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:16,445 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:16,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:16,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:16,666 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:16,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:16,667 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-07 01:48:16,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:16,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073048375] [2021-11-07 01:48:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:16,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:16,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:16,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:16,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:48:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:16,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:16,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:48:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:16,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:17,020 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:17,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073048375] [2021-11-07 01:48:17,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073048375] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:17,021 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:17,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:48:17,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210811238] [2021-11-07 01:48:17,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:48:17,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:17,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:48:17,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:17,023 INFO L87 Difference]: Start difference. First operand 2435 states and 2943 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:21,445 INFO L93 Difference]: Finished difference Result 3241 states and 3761 transitions. [2021-11-07 01:48:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:21,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-07 01:48:21,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:21,466 INFO L225 Difference]: With dead ends: 3241 [2021-11-07 01:48:21,467 INFO L226 Difference]: Without dead ends: 3241 [2021-11-07 01:48:21,467 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:48:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3241 states. [2021-11-07 01:48:21,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3241 to 2344. [2021-11-07 01:48:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2344 states, 1465 states have (on average 1.9235494880546076) internal successors, (2818), 2343 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2344 states to 2344 states and 2818 transitions. [2021-11-07 01:48:21,543 INFO L78 Accepts]: Start accepts. Automaton has 2344 states and 2818 transitions. Word has length 8 [2021-11-07 01:48:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:21,543 INFO L470 AbstractCegarLoop]: Abstraction has 2344 states and 2818 transitions. [2021-11-07 01:48:21,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:21,544 INFO L276 IsEmpty]: Start isEmpty. Operand 2344 states and 2818 transitions. [2021-11-07 01:48:21,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 01:48:21,545 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:21,545 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:21,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-07 01:48:21,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:21,765 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:21,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:21,766 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-07 01:48:21,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:21,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784000398] [2021-11-07 01:48:21,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:21,767 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:21,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:21,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:48:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:22,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:22,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:48:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:22,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:22,217 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:22,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784000398] [2021-11-07 01:48:22,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [784000398] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:22,218 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:22,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 01:48:22,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016504115] [2021-11-07 01:48:22,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:22,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:22,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:22,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:22,222 INFO L87 Difference]: Start difference. First operand 2344 states and 2818 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:31,682 INFO L93 Difference]: Finished difference Result 3372 states and 3793 transitions. [2021-11-07 01:48:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 8 [2021-11-07 01:48:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:31,702 INFO L225 Difference]: With dead ends: 3372 [2021-11-07 01:48:31,702 INFO L226 Difference]: Without dead ends: 3372 [2021-11-07 01:48:31,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:31,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-11-07 01:48:31,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 2336. [2021-11-07 01:48:31,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 1467 states have (on average 1.907293796864349) internal successors, (2798), 2335 states have internal predecessors, (2798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:31,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 2798 transitions. [2021-11-07 01:48:31,771 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 2798 transitions. Word has length 8 [2021-11-07 01:48:31,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:31,771 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 2798 transitions. [2021-11-07 01:48:31,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 2798 transitions. [2021-11-07 01:48:31,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 01:48:31,773 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:31,773 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:31,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:31,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:31,987 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:31,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:31,988 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-07 01:48:31,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:31,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839761786] [2021-11-07 01:48:31,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:31,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:31,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:31,991 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:31,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:48:32,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:32,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:32,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:32,338 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:32,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839761786] [2021-11-07 01:48:32,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839761786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:32,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:32,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:32,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653005177] [2021-11-07 01:48:32,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:32,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:32,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:32,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:32,341 INFO L87 Difference]: Start difference. First operand 2336 states and 2798 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:32,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:32,399 INFO L93 Difference]: Finished difference Result 2294 states and 2755 transitions. [2021-11-07 01:48:32,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-11-07 01:48:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:32,416 INFO L225 Difference]: With dead ends: 2294 [2021-11-07 01:48:32,416 INFO L226 Difference]: Without dead ends: 2294 [2021-11-07 01:48:32,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2021-11-07 01:48:32,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 2294. [2021-11-07 01:48:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 1449 states have (on average 1.901311249137336) internal successors, (2755), 2293 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 2755 transitions. [2021-11-07 01:48:32,477 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 2755 transitions. Word has length 11 [2021-11-07 01:48:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:32,477 INFO L470 AbstractCegarLoop]: Abstraction has 2294 states and 2755 transitions. [2021-11-07 01:48:32,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:32,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 2755 transitions. [2021-11-07 01:48:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 01:48:32,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:32,479 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:32,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:32,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:32,693 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:32,694 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-07 01:48:32,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:32,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [635782353] [2021-11-07 01:48:32,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:32,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:32,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:32,697 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:32,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:48:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:32,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:32,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:33,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:33,081 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:33,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [635782353] [2021-11-07 01:48:33,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [635782353] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:33,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:33,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:48:33,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985657505] [2021-11-07 01:48:33,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:48:33,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:33,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:48:33,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:48:33,084 INFO L87 Difference]: Start difference. First operand 2294 states and 2755 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:33,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:33,180 INFO L93 Difference]: Finished difference Result 2273 states and 2727 transitions. [2021-11-07 01:48:33,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:33,180 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 13 [2021-11-07 01:48:33,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:33,191 INFO L225 Difference]: With dead ends: 2273 [2021-11-07 01:48:33,191 INFO L226 Difference]: Without dead ends: 2273 [2021-11-07 01:48:33,191 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-11-07 01:48:33,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 2272. [2021-11-07 01:48:33,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 1441 states have (on average 1.8917418459403192) internal successors, (2726), 2271 states have internal predecessors, (2726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 2726 transitions. [2021-11-07 01:48:33,253 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 2726 transitions. Word has length 13 [2021-11-07 01:48:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:33,253 INFO L470 AbstractCegarLoop]: Abstraction has 2272 states and 2726 transitions. [2021-11-07 01:48:33,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 2726 transitions. [2021-11-07 01:48:33,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:48:33,255 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:33,255 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:33,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:33,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:33,471 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:33,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:33,471 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-07 01:48:33,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:33,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1199340804] [2021-11-07 01:48:33,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:33,473 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:33,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:33,474 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:33,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:48:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:33,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:33,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:33,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:33,888 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:33,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1199340804] [2021-11-07 01:48:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1199340804] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:33,888 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:33,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:33,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956469428] [2021-11-07 01:48:33,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:33,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:33,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:33,890 INFO L87 Difference]: Start difference. First operand 2272 states and 2726 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:33,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:33,963 INFO L93 Difference]: Finished difference Result 3583 states and 4134 transitions. [2021-11-07 01:48:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-07 01:48:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:33,985 INFO L225 Difference]: With dead ends: 3583 [2021-11-07 01:48:33,986 INFO L226 Difference]: Without dead ends: 3583 [2021-11-07 01:48:33,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-11-07 01:48:34,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 2194. [2021-11-07 01:48:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 1387 states have (on average 1.8723864455659698) internal successors, (2597), 2193 states have internal predecessors, (2597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 2597 transitions. [2021-11-07 01:48:34,049 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 2597 transitions. Word has length 20 [2021-11-07 01:48:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:34,050 INFO L470 AbstractCegarLoop]: Abstraction has 2194 states and 2597 transitions. [2021-11-07 01:48:34,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 2597 transitions. [2021-11-07 01:48:34,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 01:48:34,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:34,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:34,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:34,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:34,267 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-07 01:48:34,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:34,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976318916] [2021-11-07 01:48:34,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:34,269 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:34,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:34,271 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:34,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:48:34,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:34,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:48:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:34,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:34,703 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:34,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976318916] [2021-11-07 01:48:34,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976318916] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:34,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:34,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:48:34,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821590877] [2021-11-07 01:48:34,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:34,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:34,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:34,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:34,705 INFO L87 Difference]: Start difference. First operand 2194 states and 2597 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:34,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:34,788 INFO L93 Difference]: Finished difference Result 3506 states and 4057 transitions. [2021-11-07 01:48:34,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:48:34,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 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 20 [2021-11-07 01:48:34,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:34,810 INFO L225 Difference]: With dead ends: 3506 [2021-11-07 01:48:34,811 INFO L226 Difference]: Without dead ends: 3506 [2021-11-07 01:48:34,811 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3506 states. [2021-11-07 01:48:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3506 to 2152. [2021-11-07 01:48:34,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1369 states have (on average 1.8655953250547845) internal successors, (2554), 2151 states have internal predecessors, (2554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2554 transitions. [2021-11-07 01:48:34,874 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2554 transitions. Word has length 20 [2021-11-07 01:48:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:34,875 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 2554 transitions. [2021-11-07 01:48:34,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:34,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2554 transitions. [2021-11-07 01:48:34,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:48:34,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:34,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:34,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:35,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:35,098 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:35,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-07 01:48:35,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:35,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983843674] [2021-11-07 01:48:35,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:35,099 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:35,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:35,100 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:35,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:48:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:35,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:35,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:35,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:35,526 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:35,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983843674] [2021-11-07 01:48:35,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983843674] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:35,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:35,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:48:35,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065592219] [2021-11-07 01:48:35,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:48:35,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:48:35,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:48:35,528 INFO L87 Difference]: Start difference. First operand 2152 states and 2554 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:35,630 INFO L93 Difference]: Finished difference Result 3464 states and 3964 transitions. [2021-11-07 01:48:35,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:35,631 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-07 01:48:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:35,644 INFO L225 Difference]: With dead ends: 3464 [2021-11-07 01:48:35,644 INFO L226 Difference]: Without dead ends: 3464 [2021-11-07 01:48:35,645 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-11-07 01:48:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 2114. [2021-11-07 01:48:35,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 1345 states have (on average 1.8342007434944239) internal successors, (2467), 2113 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:35,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 2467 transitions. [2021-11-07 01:48:35,700 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 2467 transitions. Word has length 22 [2021-11-07 01:48:35,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:35,701 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 2467 transitions. [2021-11-07 01:48:35,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:35,701 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 2467 transitions. [2021-11-07 01:48:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 01:48:35,703 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:35,703 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:35,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:35,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:35,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:35,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:35,917 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-07 01:48:35,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:35,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1670604306] [2021-11-07 01:48:35,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:35,918 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:35,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:35,919 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:35,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:48:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:36,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:36,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:36,369 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:36,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1670604306] [2021-11-07 01:48:36,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1670604306] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:36,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:36,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 01:48:36,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206101318] [2021-11-07 01:48:36,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:48:36,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:48:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:48:36,372 INFO L87 Difference]: Start difference. First operand 2114 states and 2467 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:36,538 INFO L93 Difference]: Finished difference Result 3425 states and 3913 transitions. [2021-11-07 01:48:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:36,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 22 [2021-11-07 01:48:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:36,560 INFO L225 Difference]: With dead ends: 3425 [2021-11-07 01:48:36,569 INFO L226 Difference]: Without dead ends: 3425 [2021-11-07 01:48:36,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:36,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-11-07 01:48:36,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 2092. [2021-11-07 01:48:36,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 1337 states have (on average 1.8234854151084519) internal successors, (2438), 2091 states have internal predecessors, (2438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 2438 transitions. [2021-11-07 01:48:36,623 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 2438 transitions. Word has length 22 [2021-11-07 01:48:36,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:36,623 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 2438 transitions. [2021-11-07 01:48:36,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 2438 transitions. [2021-11-07 01:48:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:48:36,626 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:36,627 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:36,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:36,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:36,841 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-07 01:48:36,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:36,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428364292] [2021-11-07 01:48:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:36,843 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:36,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:36,844 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:36,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:48:37,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:37,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:37,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:37,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:48:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:37,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:37,468 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:37,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428364292] [2021-11-07 01:48:37,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1428364292] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:37,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:37,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:37,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761571107] [2021-11-07 01:48:37,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:37,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:37,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:37,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:37,471 INFO L87 Difference]: Start difference. First operand 2092 states and 2438 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:41,535 INFO L93 Difference]: Finished difference Result 2370 states and 2618 transitions. [2021-11-07 01:48:41,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:48:41,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-11-07 01:48:41,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:41,541 INFO L225 Difference]: With dead ends: 2370 [2021-11-07 01:48:41,541 INFO L226 Difference]: Without dead ends: 2370 [2021-11-07 01:48:41,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:48:41,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2370 states. [2021-11-07 01:48:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2370 to 2088. [2021-11-07 01:48:41,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 1337 states have (on average 1.8204936424831712) internal successors, (2434), 2087 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 2434 transitions. [2021-11-07 01:48:41,585 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 2434 transitions. Word has length 27 [2021-11-07 01:48:41,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:41,586 INFO L470 AbstractCegarLoop]: Abstraction has 2088 states and 2434 transitions. [2021-11-07 01:48:41,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:41,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 2434 transitions. [2021-11-07 01:48:41,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 01:48:41,588 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:41,588 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:41,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:41,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:41,802 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:41,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:41,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-07 01:48:41,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:41,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786691690] [2021-11-07 01:48:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:41,803 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:41,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:41,804 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:41,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:48:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:48:42,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:42,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:48:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:42,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:43,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:43,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:43,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786691690] [2021-11-07 01:48:43,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1786691690] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:43,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:43,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:48:43,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766762541] [2021-11-07 01:48:43,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:48:43,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:43,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:48:43,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:48:43,180 INFO L87 Difference]: Start difference. First operand 2088 states and 2434 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:56,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:48:56,936 INFO L93 Difference]: Finished difference Result 2954 states and 3287 transitions. [2021-11-07 01:48:56,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:48:56,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 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 27 [2021-11-07 01:48:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:48:56,942 INFO L225 Difference]: With dead ends: 2954 [2021-11-07 01:48:56,942 INFO L226 Difference]: Without dead ends: 2954 [2021-11-07 01:48:56,942 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:48:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2021-11-07 01:48:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2121. [2021-11-07 01:48:56,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2121 states, 1371 states have (on average 1.8023340627279358) internal successors, (2471), 2120 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:56,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2121 states to 2121 states and 2471 transitions. [2021-11-07 01:48:56,986 INFO L78 Accepts]: Start accepts. Automaton has 2121 states and 2471 transitions. Word has length 27 [2021-11-07 01:48:56,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:48:56,986 INFO L470 AbstractCegarLoop]: Abstraction has 2121 states and 2471 transitions. [2021-11-07 01:48:56,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:48:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 2121 states and 2471 transitions. [2021-11-07 01:48:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:48:56,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:48:56,989 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:48:57,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:48:57,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:48:57,203 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:48:57,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:48:57,203 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-07 01:48:57,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:48:57,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1984701581] [2021-11-07 01:48:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:48:57,205 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:48:57,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:48:57,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:48:57,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:48:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:48:57,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:48:57,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:48:57,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:48:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:57,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:48:57,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:48:57,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:48:57,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1984701581] [2021-11-07 01:48:57,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1984701581] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:48:57,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:48:57,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:48:57,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805237917] [2021-11-07 01:48:57,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:48:57,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:48:57,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:48:57,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:48:57,979 INFO L87 Difference]: Start difference. First operand 2121 states and 2471 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:05,691 INFO L93 Difference]: Finished difference Result 4548 states and 5123 transitions. [2021-11-07 01:49:05,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:05,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 01:49:05,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:05,702 INFO L225 Difference]: With dead ends: 4548 [2021-11-07 01:49:05,702 INFO L226 Difference]: Without dead ends: 4548 [2021-11-07 01:49:05,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-11-07 01:49:05,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 2118. [2021-11-07 01:49:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1371 states have (on average 1.7943107221006565) internal successors, (2460), 2117 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:05,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2460 transitions. [2021-11-07 01:49:05,776 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2460 transitions. Word has length 36 [2021-11-07 01:49:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:05,776 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 2460 transitions. [2021-11-07 01:49:05,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2460 transitions. [2021-11-07 01:49:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:49:05,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:05,779 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:05,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:05,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:05,993 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:05,994 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-07 01:49:05,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:05,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508519552] [2021-11-07 01:49:05,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:05,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:05,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:05,997 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:06,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:49:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:06,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:06,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:49:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:06,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:07,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:07,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508519552] [2021-11-07 01:49:07,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508519552] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:07,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:07,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:49:07,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382924483] [2021-11-07 01:49:07,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:07,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:07,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:07,370 INFO L87 Difference]: Start difference. First operand 2118 states and 2460 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:26,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:26,592 INFO L93 Difference]: Finished difference Result 4266 states and 4769 transitions. [2021-11-07 01:49:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:49:26,593 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 01:49:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:26,601 INFO L225 Difference]: With dead ends: 4266 [2021-11-07 01:49:26,601 INFO L226 Difference]: Without dead ends: 4266 [2021-11-07 01:49:26,602 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4266 states. [2021-11-07 01:49:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4266 to 2118. [2021-11-07 01:49:26,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1371 states have (on average 1.7913931436907367) internal successors, (2456), 2117 states have internal predecessors, (2456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2456 transitions. [2021-11-07 01:49:26,640 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2456 transitions. Word has length 36 [2021-11-07 01:49:26,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:26,640 INFO L470 AbstractCegarLoop]: Abstraction has 2118 states and 2456 transitions. [2021-11-07 01:49:26,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2456 transitions. [2021-11-07 01:49:26,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:49:26,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:26,642 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:26,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:26,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:26,853 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:26,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-07 01:49:26,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:26,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347357330] [2021-11-07 01:49:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:26,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:26,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:26,856 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:26,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:49:27,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:27,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:27,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:27,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:49:27,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:27,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:27,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:27,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:27,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347357330] [2021-11-07 01:49:27,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347357330] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:27,438 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:27,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:27,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229200676] [2021-11-07 01:49:27,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:27,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:27,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:27,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:27,440 INFO L87 Difference]: Start difference. First operand 2118 states and 2456 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:33,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:33,463 INFO L93 Difference]: Finished difference Result 4152 states and 4703 transitions. [2021-11-07 01:49:33,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:33,464 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-07 01:49:33,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:33,473 INFO L225 Difference]: With dead ends: 4152 [2021-11-07 01:49:33,474 INFO L226 Difference]: Without dead ends: 4152 [2021-11-07 01:49:33,474 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2021-11-07 01:49:33,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 2114. [2021-11-07 01:49:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2114 states, 1371 states have (on average 1.7884755652808169) internal successors, (2452), 2113 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2114 states to 2114 states and 2452 transitions. [2021-11-07 01:49:33,515 INFO L78 Accepts]: Start accepts. Automaton has 2114 states and 2452 transitions. Word has length 36 [2021-11-07 01:49:33,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:33,516 INFO L470 AbstractCegarLoop]: Abstraction has 2114 states and 2452 transitions. [2021-11-07 01:49:33,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:33,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2114 states and 2452 transitions. [2021-11-07 01:49:33,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 01:49:33,517 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:33,517 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:33,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:33,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:33,733 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:33,733 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-07 01:49:33,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:33,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [325634828] [2021-11-07 01:49:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:33,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:33,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:33,735 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:33,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 01:49:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:34,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:49:34,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:34,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:49:34,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:34,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:34,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:34,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [325634828] [2021-11-07 01:49:34,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [325634828] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:34,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:34,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:49:34,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308649647] [2021-11-07 01:49:34,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:34,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:34,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:34,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:34,936 INFO L87 Difference]: Start difference. First operand 2114 states and 2452 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:50,155 INFO L93 Difference]: Finished difference Result 4034 states and 4463 transitions. [2021-11-07 01:49:50,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:49:50,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-07 01:49:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:50,160 INFO L225 Difference]: With dead ends: 4034 [2021-11-07 01:49:50,160 INFO L226 Difference]: Without dead ends: 4034 [2021-11-07 01:49:50,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:49:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4034 states. [2021-11-07 01:49:50,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4034 to 2110. [2021-11-07 01:49:50,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2110 states, 1371 states have (on average 1.785557986870897) internal successors, (2448), 2109 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:50,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2110 states to 2110 states and 2448 transitions. [2021-11-07 01:49:50,198 INFO L78 Accepts]: Start accepts. Automaton has 2110 states and 2448 transitions. Word has length 36 [2021-11-07 01:49:50,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:50,199 INFO L470 AbstractCegarLoop]: Abstraction has 2110 states and 2448 transitions. [2021-11-07 01:49:50,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:50,199 INFO L276 IsEmpty]: Start isEmpty. Operand 2110 states and 2448 transitions. [2021-11-07 01:49:50,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 01:49:50,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:50,200 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:50,233 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-07 01:49:50,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:50,434 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:50,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-07 01:49:50,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:50,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808811454] [2021-11-07 01:49:50,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:50,435 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:50,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:50,436 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:50,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:49:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:50,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:50,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:51,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:51,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:51,135 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:51,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808811454] [2021-11-07 01:49:51,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808811454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:51,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:51,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:49:51,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849066891] [2021-11-07 01:49:51,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:51,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:51,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:51,137 INFO L87 Difference]: Start difference. First operand 2110 states and 2448 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:51,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:51,218 INFO L93 Difference]: Finished difference Result 2104 states and 2434 transitions. [2021-11-07 01:49:51,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:51,219 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 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 40 [2021-11-07 01:49:51,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:51,221 INFO L225 Difference]: With dead ends: 2104 [2021-11-07 01:49:51,222 INFO L226 Difference]: Without dead ends: 2104 [2021-11-07 01:49:51,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-11-07 01:49:51,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 2104. [2021-11-07 01:49:51,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2104 states, 1365 states have (on average 1.7831501831501833) internal successors, (2434), 2103 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:51,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2104 states to 2104 states and 2434 transitions. [2021-11-07 01:49:51,244 INFO L78 Accepts]: Start accepts. Automaton has 2104 states and 2434 transitions. Word has length 40 [2021-11-07 01:49:51,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:51,244 INFO L470 AbstractCegarLoop]: Abstraction has 2104 states and 2434 transitions. [2021-11-07 01:49:51,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:51,244 INFO L276 IsEmpty]: Start isEmpty. Operand 2104 states and 2434 transitions. [2021-11-07 01:49:51,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:49:51,245 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:51,245 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:51,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:51,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,453 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:51,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-07 01:49:51,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:51,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737005304] [2021-11-07 01:49:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:51,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:51,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:51,455 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:51,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 01:49:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:51,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:52,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:52,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:52,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737005304] [2021-11-07 01:49:52,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1737005304] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:52,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:52,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:49:52,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508128362] [2021-11-07 01:49:52,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:49:52,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:52,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:49:52,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:52,601 INFO L87 Difference]: Start difference. First operand 2104 states and 2434 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:52,826 INFO L93 Difference]: Finished difference Result 3327 states and 3785 transitions. [2021-11-07 01:49:52,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:49:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:49:52,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:52,829 INFO L225 Difference]: With dead ends: 3327 [2021-11-07 01:49:52,830 INFO L226 Difference]: Without dead ends: 3327 [2021-11-07 01:49:52,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:49:52,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-11-07 01:49:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2732. [2021-11-07 01:49:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2732 states, 1993 states have (on average 1.765178123432012) internal successors, (3518), 2731 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:52,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2732 states to 2732 states and 3518 transitions. [2021-11-07 01:49:52,876 INFO L78 Accepts]: Start accepts. Automaton has 2732 states and 3518 transitions. Word has length 48 [2021-11-07 01:49:52,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:52,877 INFO L470 AbstractCegarLoop]: Abstraction has 2732 states and 3518 transitions. [2021-11-07 01:49:52,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:52,877 INFO L276 IsEmpty]: Start isEmpty. Operand 2732 states and 3518 transitions. [2021-11-07 01:49:52,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:49:52,878 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:52,878 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:52,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:53,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:53,091 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:53,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-07 01:49:53,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:53,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1762139056] [2021-11-07 01:49:53,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:53,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:53,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:53,093 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:53,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:49:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:53,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:53,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:53,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:53,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:53,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:53,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1762139056] [2021-11-07 01:49:53,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1762139056] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:53,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:53,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:49:53,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206296643] [2021-11-07 01:49:53,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:53,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:53,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:53,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:53,813 INFO L87 Difference]: Start difference. First operand 2732 states and 3518 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:53,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:53,885 INFO L93 Difference]: Finished difference Result 3764 states and 4618 transitions. [2021-11-07 01:49:53,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:53,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:49:53,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:53,891 INFO L225 Difference]: With dead ends: 3764 [2021-11-07 01:49:53,891 INFO L226 Difference]: Without dead ends: 3764 [2021-11-07 01:49:53,891 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3764 states. [2021-11-07 01:49:53,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3764 to 2708. [2021-11-07 01:49:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2708 states, 1969 states have (on average 1.7663788725241238) internal successors, (3478), 2707 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:53,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2708 states to 2708 states and 3478 transitions. [2021-11-07 01:49:53,932 INFO L78 Accepts]: Start accepts. Automaton has 2708 states and 3478 transitions. Word has length 51 [2021-11-07 01:49:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:53,932 INFO L470 AbstractCegarLoop]: Abstraction has 2708 states and 3478 transitions. [2021-11-07 01:49:53,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 2708 states and 3478 transitions. [2021-11-07 01:49:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:49:53,933 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:53,933 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:53,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:54,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:54,134 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-07 01:49:54,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:54,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782491714] [2021-11-07 01:49:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:54,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:54,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:54,145 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:54,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 01:49:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:54,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:54,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:54,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:55,046 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:55,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782491714] [2021-11-07 01:49:55,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782491714] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:55,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:55,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 01:49:55,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316948437] [2021-11-07 01:49:55,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:49:55,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:49:55,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:49:55,048 INFO L87 Difference]: Start difference. First operand 2708 states and 3478 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:55,154 INFO L93 Difference]: Finished difference Result 3500 states and 4107 transitions. [2021-11-07 01:49:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:49:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:49:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:55,160 INFO L225 Difference]: With dead ends: 3500 [2021-11-07 01:49:55,161 INFO L226 Difference]: Without dead ends: 3500 [2021-11-07 01:49:55,161 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 01:49:55,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3500 states. [2021-11-07 01:49:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3500 to 2696. [2021-11-07 01:49:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2696 states, 1957 states have (on average 1.766990291262136) internal successors, (3458), 2695 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2696 states to 2696 states and 3458 transitions. [2021-11-07 01:49:55,211 INFO L78 Accepts]: Start accepts. Automaton has 2696 states and 3458 transitions. Word has length 54 [2021-11-07 01:49:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:55,212 INFO L470 AbstractCegarLoop]: Abstraction has 2696 states and 3458 transitions. [2021-11-07 01:49:55,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:55,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2696 states and 3458 transitions. [2021-11-07 01:49:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 01:49:55,213 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:55,213 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:55,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:55,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:55,431 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:55,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-07 01:49:55,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:55,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1100068955] [2021-11-07 01:49:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:55,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:55,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:55,434 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:55,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:49:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:56,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:56,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:56,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:56,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:56,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:49:56,222 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:49:56,222 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 01:49:56,301 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 01:49:56,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 01:49:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:56,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:49:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:56,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:49:56,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1100068955] [2021-11-07 01:49:56,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1100068955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:49:56,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:49:56,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:49:56,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537964990] [2021-11-07 01:49:56,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:49:56,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:49:56,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:49:56,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:49:56,617 INFO L87 Difference]: Start difference. First operand 2696 states and 3458 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:58,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:49:58,554 INFO L93 Difference]: Finished difference Result 2663 states and 3424 transitions. [2021-11-07 01:49:58,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:49:58,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-07 01:49:58,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:49:58,557 INFO L225 Difference]: With dead ends: 2663 [2021-11-07 01:49:58,558 INFO L226 Difference]: Without dead ends: 2663 [2021-11-07 01:49:58,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:49:58,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-11-07 01:49:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2662. [2021-11-07 01:49:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2662 states, 1923 states have (on average 1.78003120124805) internal successors, (3423), 2661 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3423 transitions. [2021-11-07 01:49:58,594 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3423 transitions. Word has length 54 [2021-11-07 01:49:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:49:58,594 INFO L470 AbstractCegarLoop]: Abstraction has 2662 states and 3423 transitions. [2021-11-07 01:49:58,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:49:58,594 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3423 transitions. [2021-11-07 01:49:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 01:49:58,595 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:49:58,595 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:49:58,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:49:58,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:49:58,810 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:49:58,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:49:58,811 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-07 01:49:58,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:49:58,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684290750] [2021-11-07 01:49:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:49:58,811 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:49:58,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:49:58,812 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:49:58,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-07 01:49:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:49:59,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:49:59,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:49:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:49:59,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:00,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:00,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684290750] [2021-11-07 01:50:00,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684290750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:00,417 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:00,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:50:00,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883157241] [2021-11-07 01:50:00,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:50:00,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:00,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:50:00,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:00,420 INFO L87 Difference]: Start difference. First operand 2662 states and 3423 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:00,673 INFO L93 Difference]: Finished difference Result 3712 states and 4603 transitions. [2021-11-07 01:50:00,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:50:00,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 01:50:00,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:00,683 INFO L225 Difference]: With dead ends: 3712 [2021-11-07 01:50:00,683 INFO L226 Difference]: Without dead ends: 3712 [2021-11-07 01:50:00,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:50:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-11-07 01:50:00,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3343. [2021-11-07 01:50:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3343 states, 2604 states have (on average 1.7542242703533026) internal successors, (4568), 3342 states have internal predecessors, (4568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3343 states to 3343 states and 4568 transitions. [2021-11-07 01:50:00,754 INFO L78 Accepts]: Start accepts. Automaton has 3343 states and 4568 transitions. Word has length 59 [2021-11-07 01:50:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:00,755 INFO L470 AbstractCegarLoop]: Abstraction has 3343 states and 4568 transitions. [2021-11-07 01:50:00,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 3343 states and 4568 transitions. [2021-11-07 01:50:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 01:50:00,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:00,756 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:00,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:00,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:00,976 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:50:00,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:00,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-07 01:50:00,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:00,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [127620391] [2021-11-07 01:50:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:00,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:00,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:00,978 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:00,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:50:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:01,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:50:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:01,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:50:01,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:50:02,826 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 01:50:02,826 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 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-07 01:50:02,832 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 01:50:02,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-07 01:50:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:02,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:08,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:08,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [127620391] [2021-11-07 01:50:08,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [127620391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:08,405 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:08,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 01:50:08,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435869190] [2021-11-07 01:50:08,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:08,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 01:50:08,407 INFO L87 Difference]: Start difference. First operand 3343 states and 4568 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:37,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:37,699 INFO L93 Difference]: Finished difference Result 6126 states and 8176 transitions. [2021-11-07 01:50:37,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 01:50:37,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-07 01:50:37,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:37,707 INFO L225 Difference]: With dead ends: 6126 [2021-11-07 01:50:37,708 INFO L226 Difference]: Without dead ends: 6126 [2021-11-07 01:50:37,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-07 01:50:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-11-07 01:50:37,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 3287. [2021-11-07 01:50:37,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 2612 states have (on average 1.6952526799387442) internal successors, (4428), 3286 states have internal predecessors, (4428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 4428 transitions. [2021-11-07 01:50:37,760 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 4428 transitions. Word has length 62 [2021-11-07 01:50:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:37,761 INFO L470 AbstractCegarLoop]: Abstraction has 3287 states and 4428 transitions. [2021-11-07 01:50:37,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 4428 transitions. [2021-11-07 01:50:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:50:37,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:37,762 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:37,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:37,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:37,978 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:50:37,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:37,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-07 01:50:37,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:37,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042566384] [2021-11-07 01:50:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:37,979 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:37,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:37,980 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:37,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 01:50:38,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:38,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:50:38,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:50:38,927 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 23 treesize of output 19 [2021-11-07 01:50:38,979 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 25 treesize of output 13 [2021-11-07 01:50:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:39,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:39,162 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:39,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042566384] [2021-11-07 01:50:39,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042566384] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:39,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:39,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:50:39,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646359368] [2021-11-07 01:50:39,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:39,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:50:39,164 INFO L87 Difference]: Start difference. First operand 3287 states and 4428 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:48,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:48,752 INFO L93 Difference]: Finished difference Result 5249 states and 7016 transitions. [2021-11-07 01:50:48,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:50:48,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:50:48,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:48,778 INFO L225 Difference]: With dead ends: 5249 [2021-11-07 01:50:48,778 INFO L226 Difference]: Without dead ends: 5249 [2021-11-07 01:50:48,779 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:50:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2021-11-07 01:50:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 3286. [2021-11-07 01:50:48,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2612 states have (on average 1.694104134762634) internal successors, (4425), 3285 states have internal predecessors, (4425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:48,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4425 transitions. [2021-11-07 01:50:48,818 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4425 transitions. Word has length 68 [2021-11-07 01:50:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:48,818 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4425 transitions. [2021-11-07 01:50:48,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4425 transitions. [2021-11-07 01:50:48,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:50:48,820 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:48,820 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:48,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-11-07 01:50:49,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:49,038 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:50:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-07 01:50:49,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:49,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649122426] [2021-11-07 01:50:49,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:49,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:49,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:49,040 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:49,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:50:49,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:50:49,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:50:49,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:50:49,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:50:49,957 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 22 treesize of output 18 [2021-11-07 01:50:49,998 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 24 treesize of output 12 [2021-11-07 01:50:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:50,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:50:50,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:50:50,168 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:50:50,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649122426] [2021-11-07 01:50:50,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649122426] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:50:50,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:50:50,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 01:50:50,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388004641] [2021-11-07 01:50:50,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:50:50,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:50:50,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:50:50,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:50:50,170 INFO L87 Difference]: Start difference. First operand 3286 states and 4425 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:50:59,573 INFO L93 Difference]: Finished difference Result 5241 states and 7002 transitions. [2021-11-07 01:50:59,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 01:50:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:50:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:50:59,577 INFO L225 Difference]: With dead ends: 5241 [2021-11-07 01:50:59,577 INFO L226 Difference]: Without dead ends: 5241 [2021-11-07 01:50:59,578 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:50:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5241 states. [2021-11-07 01:50:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5241 to 3285. [2021-11-07 01:50:59,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3285 states, 2612 states have (on average 1.6933384379785605) internal successors, (4423), 3284 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3285 states to 3285 states and 4423 transitions. [2021-11-07 01:50:59,644 INFO L78 Accepts]: Start accepts. Automaton has 3285 states and 4423 transitions. Word has length 68 [2021-11-07 01:50:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:50:59,645 INFO L470 AbstractCegarLoop]: Abstraction has 3285 states and 4423 transitions. [2021-11-07 01:50:59,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:50:59,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3285 states and 4423 transitions. [2021-11-07 01:50:59,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:50:59,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:50:59,649 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:50:59,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:50:59,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:50:59,864 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:50:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:50:59,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-07 01:50:59,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:50:59,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451739518] [2021-11-07 01:50:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:50:59,865 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:50:59,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:50:59,866 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:50:59,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-07 01:51:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:00,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:00,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:00,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:51:00,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:51:00,751 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 19 treesize of output 15 [2021-11-07 01:51:00,811 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 39 treesize of output 27 [2021-11-07 01:51:00,814 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 24 treesize of output 12 [2021-11-07 01:51:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:00,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:01,365 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:01,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451739518] [2021-11-07 01:51:01,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451739518] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:01,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:01,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:51:01,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814099003] [2021-11-07 01:51:01,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:51:01,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:01,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:51:01,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:51:01,367 INFO L87 Difference]: Start difference. First operand 3285 states and 4423 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:51:31,149 INFO L93 Difference]: Finished difference Result 4715 states and 6266 transitions. [2021-11-07 01:51:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:51:31,151 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:51:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:51:31,155 INFO L225 Difference]: With dead ends: 4715 [2021-11-07 01:51:31,155 INFO L226 Difference]: Without dead ends: 4715 [2021-11-07 01:51:31,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:51:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4715 states. [2021-11-07 01:51:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4715 to 3284. [2021-11-07 01:51:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3284 states, 2612 states have (on average 1.6921898928024501) internal successors, (4420), 3283 states have internal predecessors, (4420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3284 states to 3284 states and 4420 transitions. [2021-11-07 01:51:31,194 INFO L78 Accepts]: Start accepts. Automaton has 3284 states and 4420 transitions. Word has length 69 [2021-11-07 01:51:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:51:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 3284 states and 4420 transitions. [2021-11-07 01:51:31,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:51:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3284 states and 4420 transitions. [2021-11-07 01:51:31,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:51:31,195 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:51:31,195 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:51:31,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-07 01:51:31,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:51:31,426 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:51:31,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:51:31,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-07 01:51:31,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:51:31,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [545627994] [2021-11-07 01:51:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:51:31,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:51:31,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:51:31,428 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:51:31,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:51:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:51:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 01:51:32,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:51:32,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:51:32,547 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 19 treesize of output 15 [2021-11-07 01:51:32,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 01:51:32,649 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 39 treesize of output 27 [2021-11-07 01:51:32,654 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 24 treesize of output 12 [2021-11-07 01:51:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:32,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:51:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:51:33,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:51:33,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [545627994] [2021-11-07 01:51:33,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [545627994] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:51:33,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:51:33,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 01:51:33,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579834728] [2021-11-07 01:51:33,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 01:51:33,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:51:33,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 01:51:33,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:51:33,273 INFO L87 Difference]: Start difference. First operand 3284 states and 4420 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:03,785 INFO L93 Difference]: Finished difference Result 4710 states and 6257 transitions. [2021-11-07 01:52:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 01:52:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:52:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:03,790 INFO L225 Difference]: With dead ends: 4710 [2021-11-07 01:52:03,790 INFO L226 Difference]: Without dead ends: 4710 [2021-11-07 01:52:03,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:52:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4710 states. [2021-11-07 01:52:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4710 to 3283. [2021-11-07 01:52:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3283 states, 2612 states have (on average 1.6914241960183767) internal successors, (4418), 3282 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3283 states to 3283 states and 4418 transitions. [2021-11-07 01:52:03,836 INFO L78 Accepts]: Start accepts. Automaton has 3283 states and 4418 transitions. Word has length 69 [2021-11-07 01:52:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:03,836 INFO L470 AbstractCegarLoop]: Abstraction has 3283 states and 4418 transitions. [2021-11-07 01:52:03,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:03,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3283 states and 4418 transitions. [2021-11-07 01:52:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 01:52:03,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:03,837 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:03,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:04,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:04,037 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:52:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:04,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-07 01:52:04,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:04,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630551559] [2021-11-07 01:52:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:04,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:04,041 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:04,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-07 01:52:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:04,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 01:52:04,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:05,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:05,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:05,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:05,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630551559] [2021-11-07 01:52:05,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630551559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:52:05,188 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:52:05,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:52:05,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146341913] [2021-11-07 01:52:05,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:52:05,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:05,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:52:05,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:52:05,190 INFO L87 Difference]: Start difference. First operand 3283 states and 4418 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:05,428 INFO L93 Difference]: Finished difference Result 5974 states and 7986 transitions. [2021-11-07 01:52:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:52:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 01:52:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:05,434 INFO L225 Difference]: With dead ends: 5974 [2021-11-07 01:52:05,434 INFO L226 Difference]: Without dead ends: 5974 [2021-11-07 01:52:05,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-11-07 01:52:05,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5974 states. [2021-11-07 01:52:05,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5974 to 3298. [2021-11-07 01:52:05,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3298 states, 2627 states have (on average 1.687476208602969) internal successors, (4433), 3297 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3298 states to 3298 states and 4433 transitions. [2021-11-07 01:52:05,484 INFO L78 Accepts]: Start accepts. Automaton has 3298 states and 4433 transitions. Word has length 73 [2021-11-07 01:52:05,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:05,485 INFO L470 AbstractCegarLoop]: Abstraction has 3298 states and 4433 transitions. [2021-11-07 01:52:05,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:05,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3298 states and 4433 transitions. [2021-11-07 01:52:05,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 01:52:05,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:05,486 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-07 01:52:05,506 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:05,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:52:05,706 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:52:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-07 01:52:05,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:05,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [394762563] [2021-11-07 01:52:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:05,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:05,708 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:05,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-07 01:52:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:06,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:52:06,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:06,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:07,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:52:07,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [394762563] [2021-11-07 01:52:07,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [394762563] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:07,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1719597425] [2021-11-07 01:52:07,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:07,029 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:52:07,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:52:07,030 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:52:07,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-07 01:52:08,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:08,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:52:08,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:08,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:08,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:08,638 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:08,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1719597425] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:08,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765784841] [2021-11-07 01:52:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:52:08,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:52:08,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:52:08,645 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 01:52:08,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 01:52:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:52:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:52:09,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:09,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:52:10,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765784841] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:52:10,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 01:52:10,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 01:52:10,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523508940] [2021-11-07 01:52:10,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 01:52:10,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:52:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 01:52:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 01:52:10,156 INFO L87 Difference]: Start difference. First operand 3298 states and 4433 transitions. Second operand has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:52:11,811 INFO L93 Difference]: Finished difference Result 8693 states and 11582 transitions. [2021-11-07 01:52:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 01:52:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 01:52:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:52:11,820 INFO L225 Difference]: With dead ends: 8693 [2021-11-07 01:52:11,820 INFO L226 Difference]: Without dead ends: 8693 [2021-11-07 01:52:11,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-11-07 01:52:11,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8693 states. [2021-11-07 01:52:11,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8693 to 3340. [2021-11-07 01:52:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 2669 states have (on average 1.6796553016110902) internal successors, (4483), 3339 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:11,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 4483 transitions. [2021-11-07 01:52:11,884 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 4483 transitions. Word has length 75 [2021-11-07 01:52:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:52:11,884 INFO L470 AbstractCegarLoop]: Abstraction has 3340 states and 4483 transitions. [2021-11-07 01:52:11,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.615384615384615) internal successors, (86), 13 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:52:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 4483 transitions. [2021-11-07 01:52:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 01:52:11,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:52:11,886 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:52:11,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:12,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-07 01:52:12,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 01:52:12,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 01:52:12,502 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1001 more)] === [2021-11-07 01:52:12,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:52:12,502 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-07 01:52:12,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:52:12,503 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602362497] [2021-11-07 01:52:12,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 01:52:12,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:52:12,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:52:12,505 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:52:12,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0f528c6-c210-46c3-99ce-e413bdfd267c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-07 01:52:13,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-07 01:52:13,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 01:52:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 01:52:13,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:52:13,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-07 01:52:13,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:13,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:13,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 01:52:13,767 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 01:52:13,768 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 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 01:52:13,948 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 01:52:13,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-07 01:52:14,225 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-07 01:52:14,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-07 01:52:19,872 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-07 01:52:19,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-07 01:52:29,715 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-07 01:52:29,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-07 01:52:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-07 01:52:29,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:52:40,312 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ULTIMATE.start_main_~user~0.base_322 (_ BitVec 32))) (or (not (= (_ bv0 1) (bvneg (select |c_#valid| v_ULTIMATE.start_main_~user~0.base_322)))) (forall ((|ULTIMATE.start_main_#t~mem11| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem12| (_ BitVec 32)) (|ULTIMATE.start_main_#t~mem13| (_ BitVec 32)) (ULTIMATE.start_main_~user~0.offset (_ BitVec 32))) (bvslt (let ((.cse0 (select (store |c_#memory_int| v_ULTIMATE.start_main_~user~0.base_322 (let ((.cse1 (bvmul |ULTIMATE.start_main_#t~mem12| |ULTIMATE.start_main_#t~mem13|))) (store (store (store (store (store (store (store (store (select |c_#memory_int| v_ULTIMATE.start_main_~user~0.base_322) ULTIMATE.start_main_~user~0.offset ((_ extract 7 0) |ULTIMATE.start_main_#t~mem11|)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv1 32)) ((_ extract 15 8) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv2 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 23 16) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv3 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 31 24) |ULTIMATE.start_main_#t~mem11|)) (bvadd (_ bv4 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 7 0) .cse1)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv5 32)) ((_ extract 15 8) .cse1)) (bvadd (_ bv6 32) ULTIMATE.start_main_~user~0.offset) ((_ extract 23 16) .cse1)) (bvadd ULTIMATE.start_main_~user~0.offset (_ bv7 32)) ((_ extract 31 24) .cse1)))) |c_ULTIMATE.start_main_~#i~0.base|))) (concat (concat (concat (select .cse0 (bvadd (_ bv3 32) |c_ULTIMATE.start_main_~#i~0.offset|)) (select .cse0 (bvadd (_ bv2 32) |c_ULTIMATE.start_main_~#i~0.offset|))) (select .cse0 (bvadd |c_ULTIMATE.start_main_~#i~0.offset| (_ bv1 32)))) (select .cse0 |c_ULTIMATE.start_main_~#i~0.offset|))) (_ bv10 32))))) is different from false