./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/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 096e364e485b0e5279ae2fe39d9edab416c1da593e20bd1edd3d0a079c23fdc3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:24:02,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:24:02,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:24:02,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:24:02,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:24:02,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:24:02,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:24:02,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:24:02,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:24:02,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:24:02,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:24:02,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:24:02,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:24:02,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:24:02,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:24:02,961 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:24:02,962 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:24:02,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:24:02,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:24:02,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:24:02,970 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:24:02,971 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:24:02,973 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:24:02,974 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:24:02,977 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:24:02,978 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:24:02,978 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:24:02,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:24:02,980 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:24:02,981 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:24:02,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:24:02,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:24:02,990 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:24:02,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:24:02,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:24:02,995 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:24:02,995 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:24:02,995 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:24:02,996 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:24:02,997 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:24:02,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:24:02,998 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-07 02:24:03,049 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:24:03,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:24:03,050 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:24:03,051 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:24:03,051 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:24:03,051 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:24:03,051 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 02:24:03,051 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:24:03,052 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:24:03,052 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 02:24:03,052 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 02:24:03,052 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:24:03,052 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 02:24:03,053 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 02:24:03,053 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 02:24:03,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:24:03,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:24:03,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:24:03,054 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:24:03,054 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:24:03,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:24:03,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:24:03,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:24:03,055 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:24:03,055 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:24:03,055 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:24:03,055 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:24:03,058 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:24:03,059 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:24:03,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:24:03,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:24:03,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:24:03,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:03,060 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:24:03,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:24:03,061 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 02:24:03,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 02:24:03,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:24:03,062 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:24:03,062 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 096e364e485b0e5279ae2fe39d9edab416c1da593e20bd1edd3d0a079c23fdc3 [2021-11-07 02:24:03,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:24:03,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:24:03,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:24:03,349 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:24:03,350 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:24:03,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i [2021-11-07 02:24:03,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data/6abb70a56/fcdf065b5fd246da84326fbf1f8a2f58/FLAG8f8d7fef6 [2021-11-07 02:24:04,086 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:24:04,087 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i [2021-11-07 02:24:04,103 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data/6abb70a56/fcdf065b5fd246da84326fbf1f8a2f58/FLAG8f8d7fef6 [2021-11-07 02:24:04,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data/6abb70a56/fcdf065b5fd246da84326fbf1f8a2f58 [2021-11-07 02:24:04,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:24:04,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:24:04,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:04,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:24:04,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:24:04,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:04" (1/1) ... [2021-11-07 02:24:04,271 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e8a312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:04, skipping insertion in model container [2021-11-07 02:24:04,271 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:04" (1/1) ... [2021-11-07 02:24:04,279 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:24:04,333 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:24:04,837 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i[33021,33034] [2021-11-07 02:24:04,965 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i[44590,44603] [2021-11-07 02:24:04,985 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:05,009 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 02:24:05,010 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@13e79233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:05, skipping insertion in model container [2021-11-07 02:24:05,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:05,011 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 02:24:05,013 INFO L168 Benchmark]: Toolchain (without parser) took 748.83 ms. Allocated memory is still 88.1 MB. Free memory was 64.0 MB in the beginning and 52.6 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-07 02:24:05,014 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 64.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 02:24:05,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 746.70 ms. Allocated memory is still 88.1 MB. Free memory was 63.7 MB in the beginning and 52.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-07 02:24:05,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory was 64.2 MB in the beginning and 64.1 MB in the end (delta: 69.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 746.70 ms. Allocated memory is still 88.1 MB. Free memory was 63.7 MB in the beginning and 52.6 MB in the end (delta: 11.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 736]: 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/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 096e364e485b0e5279ae2fe39d9edab416c1da593e20bd1edd3d0a079c23fdc3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 02:24:07,388 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 02:24:07,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 02:24:07,422 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 02:24:07,423 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 02:24:07,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 02:24:07,426 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 02:24:07,429 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 02:24:07,431 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 02:24:07,432 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 02:24:07,433 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 02:24:07,435 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 02:24:07,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 02:24:07,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 02:24:07,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 02:24:07,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 02:24:07,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 02:24:07,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 02:24:07,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 02:24:07,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 02:24:07,449 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 02:24:07,451 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 02:24:07,452 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 02:24:07,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 02:24:07,457 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 02:24:07,458 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 02:24:07,458 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 02:24:07,459 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 02:24:07,460 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 02:24:07,461 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 02:24:07,462 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 02:24:07,463 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 02:24:07,464 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 02:24:07,465 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 02:24:07,466 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 02:24:07,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 02:24:07,467 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 02:24:07,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 02:24:07,480 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 02:24:07,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 02:24:07,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 02:24:07,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-07 02:24:07,510 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 02:24:07,511 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 02:24:07,512 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 02:24:07,512 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 02:24:07,512 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 02:24:07,512 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 02:24:07,513 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 02:24:07,513 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 02:24:07,513 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 02:24:07,514 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 02:24:07,514 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 02:24:07,514 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 02:24:07,515 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 02:24:07,515 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 02:24:07,515 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 02:24:07,515 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 02:24:07,516 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 02:24:07,516 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 02:24:07,516 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 02:24:07,516 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 02:24:07,517 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 02:24:07,517 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 02:24:07,517 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 02:24:07,517 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 02:24:07,517 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 02:24:07,518 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 02:24:07,518 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 02:24:07,518 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 02:24:07,518 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 02:24:07,519 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:07,519 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 02:24:07,519 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 02:24:07,519 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 02:24:07,520 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 02:24:07,520 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 02:24:07,520 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 02:24:07,520 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 096e364e485b0e5279ae2fe39d9edab416c1da593e20bd1edd3d0a079c23fdc3 [2021-11-07 02:24:07,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 02:24:07,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 02:24:07,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 02:24:07,958 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 02:24:07,960 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 02:24:07,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i [2021-11-07 02:24:08,037 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data/d8247df4e/037e4f01117e428c8f5c4b241d72eb50/FLAG1078ebdc0 [2021-11-07 02:24:08,791 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 02:24:08,792 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i [2021-11-07 02:24:08,811 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data/d8247df4e/037e4f01117e428c8f5c4b241d72eb50/FLAG1078ebdc0 [2021-11-07 02:24:08,973 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/data/d8247df4e/037e4f01117e428c8f5c4b241d72eb50 [2021-11-07 02:24:08,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 02:24:08,977 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 02:24:08,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:08,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 02:24:09,000 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 02:24:09,001 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:08" (1/1) ... [2021-11-07 02:24:09,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cd6a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:09, skipping insertion in model container [2021-11-07 02:24:09,003 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:24:08" (1/1) ... [2021-11-07 02:24:09,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 02:24:09,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:24:09,638 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i[33021,33034] [2021-11-07 02:24:09,841 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i[44590,44603] [2021-11-07 02:24:09,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:09,877 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 02:24:09,894 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 02:24:09,911 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i[33021,33034] [2021-11-07 02:24:09,958 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i[44590,44603] [2021-11-07 02:24:09,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:09,995 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 02:24:10,022 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i[33021,33034] [2021-11-07 02:24:10,073 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_ae1ef16b-58e4-4062-96b2-df3af1bef02c/sv-benchmarks/c/uthash-2.0.2/uthash_JEN_test3-2.i[44590,44603] [2021-11-07 02:24:10,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 02:24:10,158 INFO L208 MainTranslator]: Completed translation [2021-11-07 02:24:10,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10 WrapperNode [2021-11-07 02:24:10,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 02:24:10,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 02:24:10,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 02:24:10,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 02:24:10,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 02:24:10,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 02:24:10,348 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 02:24:10,348 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 02:24:10,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,375 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 02:24:10,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 02:24:10,542 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 02:24:10,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 02:24:10,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (1/1) ... [2021-11-07 02:24:10,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 02:24:10,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:24:10,578 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 02:24:10,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 02:24:10,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 02:24:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 02:24:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 02:24:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 02:24:10,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 02:24:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 02:24:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 02:24:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 02:24:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 02:24:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 02:24:10,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 02:24:10,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 02:24:16,894 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 02:24:16,894 INFO L299 CfgBuilder]: Removed 94 assume(true) statements. [2021-11-07 02:24:16,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:24:16 BoogieIcfgContainer [2021-11-07 02:24:16,899 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 02:24:16,903 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 02:24:16,903 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 02:24:16,906 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 02:24:16,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:24:08" (1/3) ... [2021-11-07 02:24:16,908 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c14f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:24:16, skipping insertion in model container [2021-11-07 02:24:16,908 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:24:10" (2/3) ... [2021-11-07 02:24:16,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60c14f11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:24:16, skipping insertion in model container [2021-11-07 02:24:16,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:24:16" (3/3) ... [2021-11-07 02:24:16,911 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_JEN_test3-2.i [2021-11-07 02:24:16,918 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 02:24:16,918 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 643 error locations. [2021-11-07 02:24:16,963 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 02:24:16,970 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 02:24:16,970 INFO L340 AbstractCegarLoop]: Starting to check reachability of 643 error locations. [2021-11-07 02:24:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand has 1279 states, 635 states have (on average 2.2566929133858267) internal successors, (1433), 1278 states have internal predecessors, (1433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 02:24:17,020 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:17,020 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 02:24:17,021 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:17,027 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-07 02:24:17,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:17,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [126859391] [2021-11-07 02:24:17,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:17,039 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:17,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:17,044 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:17,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 02:24:17,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:17,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:17,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:17,317 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 02:24:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:17,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:17,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:17,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [126859391] [2021-11-07 02:24:17,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [126859391] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:17,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:17,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:24:17,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360869785] [2021-11-07 02:24:17,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:17,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:17,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:17,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:17,409 INFO L87 Difference]: Start difference. First operand has 1279 states, 635 states have (on average 2.2566929133858267) internal successors, (1433), 1278 states have internal predecessors, (1433), 0 states have call successors, (0), 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 02:24:20,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:20,010 INFO L93 Difference]: Finished difference Result 1451 states and 1532 transitions. [2021-11-07 02:24:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:20,012 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 02:24:20,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:20,040 INFO L225 Difference]: With dead ends: 1451 [2021-11-07 02:24:20,040 INFO L226 Difference]: Without dead ends: 1449 [2021-11-07 02:24:20,041 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 02:24:20,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-11-07 02:24:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1264. [2021-11-07 02:24:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 635 states have (on average 2.105511811023622) internal successors, (1337), 1263 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1337 transitions. [2021-11-07 02:24:20,143 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1337 transitions. Word has length 3 [2021-11-07 02:24:20,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:20,143 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1337 transitions. [2021-11-07 02:24:20,144 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 02:24:20,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1337 transitions. [2021-11-07 02:24:20,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-07 02:24:20,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:20,144 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-07 02:24:20,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:20,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:20,356 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:20,357 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-07 02:24:20,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:20,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574488150] [2021-11-07 02:24:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:20,358 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:20,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:20,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:20,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 02:24:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:20,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:20,551 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 02:24:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:20,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:20,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:20,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:20,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574488150] [2021-11-07 02:24:20,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574488150] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:20,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:20,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:24:20,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911800489] [2021-11-07 02:24:20,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:20,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:20,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:20,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:20,687 INFO L87 Difference]: Start difference. First operand 1264 states and 1337 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 02:24:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:27,133 INFO L93 Difference]: Finished difference Result 1958 states and 2080 transitions. [2021-11-07 02:24:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:27,134 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 02:24:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:27,146 INFO L225 Difference]: With dead ends: 1958 [2021-11-07 02:24:27,146 INFO L226 Difference]: Without dead ends: 1958 [2021-11-07 02:24:27,147 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 02:24:27,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-11-07 02:24:27,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1299. [2021-11-07 02:24:27,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 679 states have (on average 2.085419734904271) internal successors, (1416), 1298 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1416 transitions. [2021-11-07 02:24:27,185 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1416 transitions. Word has length 3 [2021-11-07 02:24:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:27,186 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 1416 transitions. [2021-11-07 02:24:27,186 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 02:24:27,186 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1416 transitions. [2021-11-07 02:24:27,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:24:27,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:27,187 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:27,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-07 02:24:27,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:27,398 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:27,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:27,403 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-07 02:24:27,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:27,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655814162] [2021-11-07 02:24:27,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:27,404 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:27,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:27,407 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:27,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 02:24:27,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:27,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:27,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:27,594 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 02:24:27,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:27,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:27,653 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:27,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655814162] [2021-11-07 02:24:27,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655814162] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:27,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:27,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 02:24:27,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139876599] [2021-11-07 02:24:27,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 02:24:27,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 02:24:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 02:24:27,670 INFO L87 Difference]: Start difference. First operand 1299 states and 1416 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 02:24:30,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:30,152 INFO L93 Difference]: Finished difference Result 1627 states and 1769 transitions. [2021-11-07 02:24:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:30,153 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 02:24:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:30,161 INFO L225 Difference]: With dead ends: 1627 [2021-11-07 02:24:30,161 INFO L226 Difference]: Without dead ends: 1627 [2021-11-07 02:24:30,162 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 02:24:30,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2021-11-07 02:24:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1250. [2021-11-07 02:24:30,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 679 states have (on average 2.008836524300442) internal successors, (1364), 1249 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1364 transitions. [2021-11-07 02:24:30,191 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1364 transitions. Word has length 8 [2021-11-07 02:24:30,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:30,192 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1364 transitions. [2021-11-07 02:24:30,192 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 02:24:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1364 transitions. [2021-11-07 02:24:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 02:24:30,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:30,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:30,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:30,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:30,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:30,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:30,405 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-07 02:24:30,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:30,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [511945794] [2021-11-07 02:24:30,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:30,406 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:30,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:30,406 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:30,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 02:24:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:30,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:30,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:30,580 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 02:24:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:30,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:30,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:30,715 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:30,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [511945794] [2021-11-07 02:24:30,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [511945794] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:30,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:30,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 02:24:30,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316815239] [2021-11-07 02:24:30,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:30,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:30,718 INFO L87 Difference]: Start difference. First operand 1250 states and 1364 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 02:24:36,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:36,024 INFO L93 Difference]: Finished difference Result 1670 states and 1776 transitions. [2021-11-07 02:24:36,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:36,025 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 02:24:36,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:36,033 INFO L225 Difference]: With dead ends: 1670 [2021-11-07 02:24:36,033 INFO L226 Difference]: Without dead ends: 1670 [2021-11-07 02:24:36,034 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 02:24:36,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-11-07 02:24:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1240. [2021-11-07 02:24:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 679 states have (on average 1.9896907216494846) internal successors, (1351), 1239 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:36,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1351 transitions. [2021-11-07 02:24:36,063 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1351 transitions. Word has length 8 [2021-11-07 02:24:36,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:36,063 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1351 transitions. [2021-11-07 02:24:36,064 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 02:24:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1351 transitions. [2021-11-07 02:24:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-07 02:24:36,064 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:36,065 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:36,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:36,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:36,279 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:36,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:36,280 INFO L85 PathProgramCache]: Analyzing trace with hash -945574260, now seen corresponding path program 1 times [2021-11-07 02:24:36,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:36,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [903808946] [2021-11-07 02:24:36,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:36,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:36,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:36,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:36,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 02:24:36,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:36,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:36,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:36,637 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:36,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [903808946] [2021-11-07 02:24:36,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [903808946] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:36,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:36,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:24:36,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696517349] [2021-11-07 02:24:36,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:36,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:36,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:36,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:36,642 INFO L87 Difference]: Start difference. First operand 1240 states and 1351 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:37,615 INFO L93 Difference]: Finished difference Result 1882 states and 2035 transitions. [2021-11-07 02:24:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:24:37,618 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 02:24:37,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:37,627 INFO L225 Difference]: With dead ends: 1882 [2021-11-07 02:24:37,628 INFO L226 Difference]: Without dead ends: 1882 [2021-11-07 02:24:37,628 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 02:24:37,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2021-11-07 02:24:37,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1480. [2021-11-07 02:24:37,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 919 states have (on average 1.9640914036996735) internal successors, (1805), 1479 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:37,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1805 transitions. [2021-11-07 02:24:37,666 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1805 transitions. Word has length 11 [2021-11-07 02:24:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:37,666 INFO L470 AbstractCegarLoop]: Abstraction has 1480 states and 1805 transitions. [2021-11-07 02:24:37,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1805 transitions. [2021-11-07 02:24:37,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-07 02:24:37,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:37,668 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:37,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:37,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:37,879 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr340REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:37,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:37,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1258779124, now seen corresponding path program 1 times [2021-11-07 02:24:37,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:37,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [911133491] [2021-11-07 02:24:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:37,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:37,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:37,882 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:37,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 02:24:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:38,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:38,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:38,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:38,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:38,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:38,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:38,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [911133491] [2021-11-07 02:24:38,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [911133491] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:38,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:38,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:24:38,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231620531] [2021-11-07 02:24:38,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:38,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:38,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:38,161 INFO L87 Difference]: Start difference. First operand 1480 states and 1805 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:38,199 INFO L93 Difference]: Finished difference Result 1671 states and 1988 transitions. [2021-11-07 02:24:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:38,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 02:24:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:38,208 INFO L225 Difference]: With dead ends: 1671 [2021-11-07 02:24:38,208 INFO L226 Difference]: Without dead ends: 1671 [2021-11-07 02:24:38,209 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-11-07 02:24:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1420. [2021-11-07 02:24:38,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 883 states have (on average 1.9467723669309174) internal successors, (1719), 1419 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:38,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1719 transitions. [2021-11-07 02:24:38,241 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1719 transitions. Word has length 13 [2021-11-07 02:24:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:38,242 INFO L470 AbstractCegarLoop]: Abstraction has 1420 states and 1719 transitions. [2021-11-07 02:24:38,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:38,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1719 transitions. [2021-11-07 02:24:38,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 02:24:38,243 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:38,243 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:38,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:38,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:38,455 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr364REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:38,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:38,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1494013586, now seen corresponding path program 1 times [2021-11-07 02:24:38,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:38,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832223836] [2021-11-07 02:24:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:38,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:38,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:38,458 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:38,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 02:24:38,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:38,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:38,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:38,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:38,717 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:38,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832223836] [2021-11-07 02:24:38,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832223836] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:38,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:38,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:24:38,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631828630] [2021-11-07 02:24:38,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:24:38,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:38,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:24:38,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:24:38,719 INFO L87 Difference]: Start difference. First operand 1420 states and 1719 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:38,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:38,816 INFO L93 Difference]: Finished difference Result 1643 states and 1932 transitions. [2021-11-07 02:24:38,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:38,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 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 15 [2021-11-07 02:24:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:38,825 INFO L225 Difference]: With dead ends: 1643 [2021-11-07 02:24:38,825 INFO L226 Difference]: Without dead ends: 1643 [2021-11-07 02:24:38,826 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 25 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 02:24:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-07 02:24:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1390. [2021-11-07 02:24:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1390 states, 867 states have (on average 1.9158016147635524) internal successors, (1661), 1389 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1390 states to 1390 states and 1661 transitions. [2021-11-07 02:24:38,856 INFO L78 Accepts]: Start accepts. Automaton has 1390 states and 1661 transitions. Word has length 15 [2021-11-07 02:24:38,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:38,858 INFO L470 AbstractCegarLoop]: Abstraction has 1390 states and 1661 transitions. [2021-11-07 02:24:38,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:38,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1390 states and 1661 transitions. [2021-11-07 02:24:38,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 02:24:38,860 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:38,860 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:38,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:39,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:39,075 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr642ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -420131505, now seen corresponding path program 1 times [2021-11-07 02:24:39,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:39,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782811396] [2021-11-07 02:24:39,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:39,076 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:39,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:39,077 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:39,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 02:24:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:39,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:39,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:24:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:24:39,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 02:24:39,341 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 02:24:39,341 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 02:24:39,410 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 02:24:39,410 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 02:24:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:39,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:39,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:39,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782811396] [2021-11-07 02:24:39,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782811396] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:39,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:39,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:24:39,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482145272] [2021-11-07 02:24:39,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:24:39,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:39,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:24:39,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:24:39,544 INFO L87 Difference]: Start difference. First operand 1390 states and 1661 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:40,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:40,853 INFO L93 Difference]: Finished difference Result 1854 states and 2190 transitions. [2021-11-07 02:24:40,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:40,854 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 16 [2021-11-07 02:24:40,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:40,861 INFO L225 Difference]: With dead ends: 1854 [2021-11-07 02:24:40,862 INFO L226 Difference]: Without dead ends: 1854 [2021-11-07 02:24:40,862 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 02:24:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-11-07 02:24:40,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1389. [2021-11-07 02:24:40,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1389 states, 866 states have (on average 1.915704387990762) internal successors, (1659), 1388 states have internal predecessors, (1659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:40,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1389 states to 1389 states and 1659 transitions. [2021-11-07 02:24:40,892 INFO L78 Accepts]: Start accepts. Automaton has 1389 states and 1659 transitions. Word has length 16 [2021-11-07 02:24:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:40,893 INFO L470 AbstractCegarLoop]: Abstraction has 1389 states and 1659 transitions. [2021-11-07 02:24:40,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1389 states and 1659 transitions. [2021-11-07 02:24:40,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 02:24:40,894 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:40,894 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:40,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:41,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:41,106 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:41,107 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-07 02:24:41,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:41,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1625759843] [2021-11-07 02:24:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:41,107 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:41,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:41,109 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:41,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 02:24:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:41,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 02:24:41,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:41,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:41,382 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:41,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1625759843] [2021-11-07 02:24:41,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1625759843] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:41,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:41,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 02:24:41,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327423386] [2021-11-07 02:24:41,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:41,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:41,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:41,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:41,385 INFO L87 Difference]: Start difference. First operand 1389 states and 1659 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:41,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:41,419 INFO L93 Difference]: Finished difference Result 1329 states and 1573 transitions. [2021-11-07 02:24:41,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 02:24:41,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 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 18 [2021-11-07 02:24:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:41,426 INFO L225 Difference]: With dead ends: 1329 [2021-11-07 02:24:41,426 INFO L226 Difference]: Without dead ends: 1329 [2021-11-07 02:24:41,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:41,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2021-11-07 02:24:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1329. [2021-11-07 02:24:41,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1329 states, 830 states have (on average 1.8951807228915662) internal successors, (1573), 1328 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1329 states to 1329 states and 1573 transitions. [2021-11-07 02:24:41,452 INFO L78 Accepts]: Start accepts. Automaton has 1329 states and 1573 transitions. Word has length 18 [2021-11-07 02:24:41,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:41,452 INFO L470 AbstractCegarLoop]: Abstraction has 1329 states and 1573 transitions. [2021-11-07 02:24:41,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1329 states and 1573 transitions. [2021-11-07 02:24:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 02:24:41,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:41,453 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:41,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:41,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:41,665 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:41,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:41,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-07 02:24:41,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:41,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140247252] [2021-11-07 02:24:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:41,666 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:41,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:41,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:41,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 02:24:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:41,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:41,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:41,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:41,965 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:41,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140247252] [2021-11-07 02:24:41,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140247252] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:41,965 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:41,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 02:24:41,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651174664] [2021-11-07 02:24:41,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 02:24:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:41,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 02:24:41,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 02:24:41,967 INFO L87 Difference]: Start difference. First operand 1329 states and 1573 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:42,049 INFO L93 Difference]: Finished difference Result 1301 states and 1517 transitions. [2021-11-07 02:24:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:42,050 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 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 02:24:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:42,056 INFO L225 Difference]: With dead ends: 1301 [2021-11-07 02:24:42,056 INFO L226 Difference]: Without dead ends: 1301 [2021-11-07 02:24:42,057 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 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 02:24:42,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-11-07 02:24:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1299. [2021-11-07 02:24:42,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 814 states have (on average 1.8611793611793612) internal successors, (1515), 1298 states have internal predecessors, (1515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 1515 transitions. [2021-11-07 02:24:42,094 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 1515 transitions. Word has length 20 [2021-11-07 02:24:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:42,094 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 1515 transitions. [2021-11-07 02:24:42,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:42,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 1515 transitions. [2021-11-07 02:24:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:24:42,097 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:42,097 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] [2021-11-07 02:24:42,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:42,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:42,309 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:42,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:42,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-07 02:24:42,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:42,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747479082] [2021-11-07 02:24:42,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:42,310 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:42,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:42,311 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:42,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 02:24:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:42,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:42,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:42,558 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 02:24:42,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:42,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:42,858 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:42,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747479082] [2021-11-07 02:24:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747479082] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:42,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:42,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 02:24:42,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281814268] [2021-11-07 02:24:42,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:42,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:42,861 INFO L87 Difference]: Start difference. First operand 1299 states and 1515 transitions. Second operand has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:45,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:45,726 INFO L93 Difference]: Finished difference Result 1910 states and 2254 transitions. [2021-11-07 02:24:45,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 02:24:45,726 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-11-07 02:24:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:45,736 INFO L225 Difference]: With dead ends: 1910 [2021-11-07 02:24:45,736 INFO L226 Difference]: Without dead ends: 1910 [2021-11-07 02:24:45,737 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 64 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 02:24:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2021-11-07 02:24:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1295. [2021-11-07 02:24:45,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 814 states have (on average 1.8513513513513513) internal successors, (1507), 1294 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 1507 transitions. [2021-11-07 02:24:45,762 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 1507 transitions. Word has length 34 [2021-11-07 02:24:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:45,762 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 1507 transitions. [2021-11-07 02:24:45,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.333333333333334) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 1507 transitions. [2021-11-07 02:24:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 02:24:45,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:45,764 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] [2021-11-07 02:24:45,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:45,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:45,976 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:45,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:45,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-07 02:24:45,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:45,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561004550] [2021-11-07 02:24:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:45,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:45,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:45,978 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:45,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 02:24:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:46,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:24:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:46,233 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 02:24:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:46,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:47,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:47,037 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:47,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561004550] [2021-11-07 02:24:47,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561004550] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:47,037 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:47,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:24:47,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628066772] [2021-11-07 02:24:47,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:24:47,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:47,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:24:47,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:24:47,039 INFO L87 Difference]: Start difference. First operand 1295 states and 1507 transitions. Second operand has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:54,497 INFO L93 Difference]: Finished difference Result 2035 states and 2356 transitions. [2021-11-07 02:24:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 02:24:54,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-07 02:24:54,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:54,504 INFO L225 Difference]: With dead ends: 2035 [2021-11-07 02:24:54,504 INFO L226 Difference]: Without dead ends: 2035 [2021-11-07 02:24:54,505 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-07 02:24:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2021-11-07 02:24:54,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1291. [2021-11-07 02:24:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 814 states have (on average 1.8415233415233416) internal successors, (1499), 1290 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:54,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 1499 transitions. [2021-11-07 02:24:54,540 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 1499 transitions. Word has length 34 [2021-11-07 02:24:54,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:54,540 INFO L470 AbstractCegarLoop]: Abstraction has 1291 states and 1499 transitions. [2021-11-07 02:24:54,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.8) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:54,541 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 1499 transitions. [2021-11-07 02:24:54,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 02:24:54,543 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:54,543 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] [2021-11-07 02:24:54,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:54,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:54,758 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:54,758 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-07 02:24:54,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:54,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551325848] [2021-11-07 02:24:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:54,759 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:54,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:54,759 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:54,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 02:24:55,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:24:55,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:55,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:24:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:55,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:24:55,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551325848] [2021-11-07 02:24:55,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551325848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:24:55,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:24:55,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 02:24:55,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144370448] [2021-11-07 02:24:55,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 02:24:55,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:24:55,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 02:24:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 02:24:55,348 INFO L87 Difference]: Start difference. First operand 1291 states and 1499 transitions. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:24:55,408 INFO L93 Difference]: Finished difference Result 1279 states and 1479 transitions. [2021-11-07 02:24:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 02:24:55,409 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-07 02:24:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:24:55,416 INFO L225 Difference]: With dead ends: 1279 [2021-11-07 02:24:55,416 INFO L226 Difference]: Without dead ends: 1279 [2021-11-07 02:24:55,417 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 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 02:24:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-11-07 02:24:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1279. [2021-11-07 02:24:55,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 802 states have (on average 1.844139650872818) internal successors, (1479), 1278 states have internal predecessors, (1479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1479 transitions. [2021-11-07 02:24:55,440 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1479 transitions. Word has length 52 [2021-11-07 02:24:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:24:55,440 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 1479 transitions. [2021-11-07 02:24:55,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:24:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1479 transitions. [2021-11-07 02:24:55,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 02:24:55,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:24:55,446 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:24:55,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 02:24:55,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:24:55,659 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:24:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:24:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-07 02:24:55,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:24:55,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [491725167] [2021-11-07 02:24:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:24:55,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:24:55,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:24:55,662 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:24:55,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 02:24:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:24:56,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:24:56,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:24:56,200 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 02:24:56,207 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 02:24:57,008 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 02:24:57,009 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 27 treesize of output 29 [2021-11-07 02:24:57,035 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 02:24:57,035 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 26 treesize of output 22 [2021-11-07 02:24:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:24:57,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:02,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:02,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [491725167] [2021-11-07 02:25:02,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [491725167] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:02,388 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:02,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 02:25:02,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74359699] [2021-11-07 02:25:02,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:02,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:02,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:02,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 02:25:02,390 INFO L87 Difference]: Start difference. First operand 1279 states and 1479 transitions. Second operand has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:19,422 INFO L93 Difference]: Finished difference Result 2074 states and 2520 transitions. [2021-11-07 02:25:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 02:25:19,423 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-07 02:25:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:19,434 INFO L225 Difference]: With dead ends: 2074 [2021-11-07 02:25:19,434 INFO L226 Difference]: Without dead ends: 2074 [2021-11-07 02:25:19,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 114 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 02:25:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2021-11-07 02:25:19,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1241. [2021-11-07 02:25:19,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 802 states have (on average 1.7967581047381547) internal successors, (1441), 1240 states have internal predecessors, (1441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 1441 transitions. [2021-11-07 02:25:19,455 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 1441 transitions. Word has length 60 [2021-11-07 02:25:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:19,456 INFO L470 AbstractCegarLoop]: Abstraction has 1241 states and 1441 transitions. [2021-11-07 02:25:19,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.2) internal successors, (116), 6 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 1441 transitions. [2021-11-07 02:25:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 02:25:19,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:19,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:19,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:19,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:19,672 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:25:19,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:19,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-07 02:25:19,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:19,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752563775] [2021-11-07 02:25:19,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:19,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:19,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:19,674 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:19,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 02:25:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:20,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:20,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:20,300 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 02:25:20,320 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 24 treesize of output 20 [2021-11-07 02:25:20,370 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 26 treesize of output 14 [2021-11-07 02:25:20,415 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 02:25:20,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:20,615 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 02:25:20,615 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:20,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752563775] [2021-11-07 02:25:20,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752563775] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:20,616 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:20,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-07 02:25:20,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173810056] [2021-11-07 02:25:20,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:20,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:20,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:20,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:20,618 INFO L87 Difference]: Start difference. First operand 1241 states and 1441 transitions. Second operand has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:27,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:27,083 INFO L93 Difference]: Finished difference Result 2049 states and 2386 transitions. [2021-11-07 02:25:27,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 02:25:27,084 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 02:25:27,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:27,094 INFO L225 Difference]: With dead ends: 2049 [2021-11-07 02:25:27,094 INFO L226 Difference]: Without dead ends: 2049 [2021-11-07 02:25:27,095 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:25:27,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-11-07 02:25:27,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1240. [2021-11-07 02:25:27,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 802 states have (on average 1.7955112219451372) internal successors, (1440), 1239 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:27,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1440 transitions. [2021-11-07 02:25:27,118 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1440 transitions. Word has length 66 [2021-11-07 02:25:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:27,119 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1440 transitions. [2021-11-07 02:25:27,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.2) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1440 transitions. [2021-11-07 02:25:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 02:25:27,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:27,120 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:25:27,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 02:25:27,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:27,341 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:25:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-07 02:25:27,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:27,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1267846549] [2021-11-07 02:25:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:27,343 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:27,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:27,345 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:27,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 02:25:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:27,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 02:25:27,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:27,986 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 02:25:28,008 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 02:25:28,019 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 02:25:28,116 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 02:25:28,120 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 02:25:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:28,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:28,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:28,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1267846549] [2021-11-07 02:25:28,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1267846549] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:28,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:28,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-07 02:25:28,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632407857] [2021-11-07 02:25:28,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 02:25:28,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 02:25:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-07 02:25:28,710 INFO L87 Difference]: Start difference. First operand 1240 states and 1440 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:47,641 INFO L93 Difference]: Finished difference Result 1971 states and 2285 transitions. [2021-11-07 02:25:47,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 02:25:47,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 02:25:47,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:47,650 INFO L225 Difference]: With dead ends: 1971 [2021-11-07 02:25:47,650 INFO L226 Difference]: Without dead ends: 1971 [2021-11-07 02:25:47,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 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 02:25:47,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-11-07 02:25:47,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1239. [2021-11-07 02:25:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 802 states have (on average 1.7942643391521198) internal successors, (1439), 1238 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1439 transitions. [2021-11-07 02:25:47,669 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1439 transitions. Word has length 67 [2021-11-07 02:25:47,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:47,669 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 1439 transitions. [2021-11-07 02:25:47,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 10 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:47,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1439 transitions. [2021-11-07 02:25:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 02:25:47,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:47,671 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] [2021-11-07 02:25:47,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:47,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:47,884 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:25:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:47,885 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-07 02:25:47,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:47,885 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [994078597] [2021-11-07 02:25:47,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:47,886 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:47,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:47,886 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:47,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 02:25:48,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:48,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 02:25:48,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:48,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:48,818 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:48,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [994078597] [2021-11-07 02:25:48,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [994078597] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 02:25:48,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 02:25:48,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 02:25:48,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111530440] [2021-11-07 02:25:48,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 02:25:48,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 02:25:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-07 02:25:48,819 INFO L87 Difference]: Start difference. First operand 1239 states and 1439 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:48,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:48,967 INFO L93 Difference]: Finished difference Result 2328 states and 2688 transitions. [2021-11-07 02:25:48,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 02:25:48,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 02:25:48,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:48,976 INFO L225 Difference]: With dead ends: 2328 [2021-11-07 02:25:48,976 INFO L226 Difference]: Without dead ends: 2328 [2021-11-07 02:25:48,977 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 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 02:25:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2021-11-07 02:25:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 1242. [2021-11-07 02:25:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 805 states have (on average 1.791304347826087) internal successors, (1442), 1241 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 1442 transitions. [2021-11-07 02:25:48,998 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 1442 transitions. Word has length 71 [2021-11-07 02:25:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:48,998 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 1442 transitions. [2021-11-07 02:25:48,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:48,998 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 1442 transitions. [2021-11-07 02:25:48,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-07 02:25:48,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:48,999 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] [2021-11-07 02:25:49,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:49,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 02:25:49,200 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:25:49,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-07 02:25:49,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:49,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437051679] [2021-11-07 02:25:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:49,201 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:49,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:49,202 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:49,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 02:25:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:49,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:49,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:50,066 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 02:25:50,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:50,377 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 02:25:50,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:50,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437051679] [2021-11-07 02:25:50,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437051679] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:50,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1295408445] [2021-11-07 02:25:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:50,378 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:50,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:25:50,384 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:25:50,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-07 02:25:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:51,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 02:25:51,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:51,525 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 02:25:51,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:51,704 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 02:25:51,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1295408445] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:51,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457948167] [2021-11-07 02:25:51,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 02:25:51,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:25:51,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:25:51,707 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:25:51,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 02:25:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 02:25:52,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 02:25:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:52,496 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 02:25:52,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:52,805 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 02:25:52,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457948167] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:52,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-07 02:25:52,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 13 [2021-11-07 02:25:52,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557585602] [2021-11-07 02:25:52,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 02:25:52,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:25:52,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 02:25:52,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-07 02:25:52,814 INFO L87 Difference]: Start difference. First operand 1242 states and 1442 transitions. Second operand has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:25:53,894 INFO L93 Difference]: Finished difference Result 3430 states and 3950 transitions. [2021-11-07 02:25:53,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 02:25:53,895 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-07 02:25:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:25:53,900 INFO L225 Difference]: With dead ends: 3430 [2021-11-07 02:25:53,901 INFO L226 Difference]: Without dead ends: 3430 [2021-11-07 02:25:53,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 424 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 02:25:53,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3430 states. [2021-11-07 02:25:53,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3430 to 1251. [2021-11-07 02:25:53,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 814 states have (on average 1.785012285012285) internal successors, (1453), 1250 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 1453 transitions. [2021-11-07 02:25:53,926 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 1453 transitions. Word has length 73 [2021-11-07 02:25:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:25:53,927 INFO L470 AbstractCegarLoop]: Abstraction has 1251 states and 1453 transitions. [2021-11-07 02:25:53,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.461538461538462) internal successors, (84), 13 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:25:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 1453 transitions. [2021-11-07 02:25:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 02:25:53,927 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:25:53,928 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] [2021-11-07 02:25:53,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:54,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 02:25:54,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-07 02:25:54,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:54,531 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:25:54,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:25:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-07 02:25:54,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:25:54,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375881100] [2021-11-07 02:25:54,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:25:54,533 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:25:54,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:25:54,534 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:25:54,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 02:25:55,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:25:55,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:25:55,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:25:55,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:56,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:56,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:25:56,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375881100] [2021-11-07 02:25:56,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375881100] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:56,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [619181505] [2021-11-07 02:25:56,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:25:56,566 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:25:56,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:25:56,567 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:25:56,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 02:25:58,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:25:58,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:25:58,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 02:25:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:25:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:58,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:25:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:25:58,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [619181505] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:25:58,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226403473] [2021-11-07 02:25:58,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 02:25:58,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:25:58,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:25:58,727 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:25:58,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 02:26:13,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 02:26:13,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:26:13,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 02:26:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:26:14,058 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 02:26:14,083 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-07 02:26:14,084 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 17 treesize of output 17 [2021-11-07 02:26:14,170 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 02:26:14,181 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 02:26:14,621 INFO L354 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2021-11-07 02:26:14,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2021-11-07 02:26:14,657 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-07 02:26:14,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 51 [2021-11-07 02:26:15,522 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 02:26:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 02:26:16,355 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:26:16,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 02:26:18,384 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 02:26:18,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 02:26:19,402 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:26:19,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 02:26:20,586 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 02:26:20,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 02:26:23,698 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:26:23,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 02:26:25,007 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-07 02:26:25,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 90 [2021-11-07 02:26:25,070 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:26:25,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 74 [2021-11-07 02:26:26,567 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-07 02:26:26,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 78 [2021-11-07 02:26:26,628 INFO L354 Elim1Store]: treesize reduction 104, result has 19.4 percent of original size [2021-11-07 02:26:26,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 101 [2021-11-07 02:26:27,175 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 02:26:27,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 62 [2021-11-07 02:26:27,192 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-07 02:26:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 26 [2021-11-07 02:26:27,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 02:26:27,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:26:29,672 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr281| (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr281| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse1 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (_ bv20 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse0 ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_#Ultimate.C_memset_#value|)))) c_ULTIMATE.start_main_~user~0.base) .cse1)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) .cse0 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse1))))) (forall ((|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr281| (_ BitVec 32))) (let ((.cse2 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr281| |c_ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) ((_ zero_extend 24) ((_ extract 7 0) |c_ULTIMATE.start_#Ultimate.C_memset_#value|)))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse2) (bvadd (_ bv20 32) .cse2))))) is different from false [2021-11-07 02:27:26,599 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_subst_3 (_ BitVec 32)) (v_subst_2 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr281| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32)) (v_subst_9 (_ BitVec 32))) (let ((.cse0 (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr281| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse2 (bvadd v_subst_9 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse3 (bvadd v_subst_3 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse4 (bvadd v_subst_2 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|)) (.cse5 (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem40.base| (let ((.cse1 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem40.base|) .cse0 .cse1) .cse2 .cse1) .cse3 .cse1) .cse4 .cse1))) c_ULTIMATE.start_main_~user~0.base) .cse5) (_ bv20 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem40.base| (store (store (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem40.base|) .cse0 (_ bv0 32)) .cse2 (_ bv0 32)) .cse3 (_ bv0 32)) .cse4 (_ bv0 32))) c_ULTIMATE.start_main_~user~0.base) .cse5))))) (forall ((v_subst_4 (_ BitVec 32)) (v_subst_1 (_ BitVec 32)) (v_subst_10 (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#ptr.offset| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#t~loopctr281| (_ BitVec 32)) (|ULTIMATE.start_#Ultimate.C_memset_#value| (_ BitVec 32))) (let ((.cse6 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem40.base| (let ((.cse7 ((_ zero_extend 24) ((_ extract 7 0) |ULTIMATE.start_#Ultimate.C_memset_#value|)))) (store (store (store (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem40.base|) (bvadd |ULTIMATE.start_#Ultimate.C_memset_#t~loopctr281| |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse7) (bvadd v_subst_10 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse7) (bvadd v_subst_4 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse7) (bvadd v_subst_1 |ULTIMATE.start_#Ultimate.C_memset_#ptr.offset|) .cse7))) c_ULTIMATE.start_main_~user~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_main_~user~0.offset)))) (bvule (bvadd (_ bv16 32) .cse6) (bvadd .cse6 (_ bv20 32)))))) is different from false [2021-11-07 02:27:45,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-07 02:27:45,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2021-11-07 02:27:45,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 18 [2021-11-07 02:27:45,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100778311] [2021-11-07 02:27:45,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 02:27:45,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 02:27:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 02:27:45,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=825, Unknown=18, NotChecked=122, Total=1122 [2021-11-07 02:27:45,993 INFO L87 Difference]: Start difference. First operand 1251 states and 1453 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 02:27:50,122 INFO L93 Difference]: Finished difference Result 2150 states and 2502 transitions. [2021-11-07 02:27:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 02:27:50,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 02:27:50,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 02:27:50,128 INFO L225 Difference]: With dead ends: 2150 [2021-11-07 02:27:50,129 INFO L226 Difference]: Without dead ends: 2150 [2021-11-07 02:27:50,130 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 359 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 79.6s TimeCoverageRelationStatistics Valid=430, Invalid=1630, Unknown=18, NotChecked=178, Total=2256 [2021-11-07 02:27:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2150 states. [2021-11-07 02:27:50,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2150 to 1263. [2021-11-07 02:27:50,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 826 states have (on average 1.7736077481840193) internal successors, (1465), 1262 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 1465 transitions. [2021-11-07 02:27:50,189 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 1465 transitions. Word has length 77 [2021-11-07 02:27:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 02:27:50,189 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 1465 transitions. [2021-11-07 02:27:50,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 02:27:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 1465 transitions. [2021-11-07 02:27:50,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-07 02:27:50,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 02:27:50,191 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 02:27:50,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-11-07 02:27:50,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 02:27:50,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 02:27:50,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:27:50,798 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 639 more)] === [2021-11-07 02:27:50,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 02:27:50,798 INFO L85 PathProgramCache]: Analyzing trace with hash 688279334, now seen corresponding path program 3 times [2021-11-07 02:27:50,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 02:27:50,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1347278674] [2021-11-07 02:27:50,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:27:50,799 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 02:27:50,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 02:27:50,800 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 02:27:50,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-07 02:27:52,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 02:27:52,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:27:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:27:52,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:27:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:53,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:27:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:55,726 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 02:27:55,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1347278674] [2021-11-07 02:27:55,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1347278674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:27:55,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1894168502] [2021-11-07 02:27:55,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:27:55,727 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 02:27:55,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 02:27:55,728 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 02:27:55,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-07 02:27:58,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 02:27:58,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 02:27:58,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 02:27:58,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 02:27:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:59,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 02:27:59,500 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 02:27:59,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1894168502] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 02:27:59,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586519364] [2021-11-07 02:27:59,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 02:27:59,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 02:27:59,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 02:27:59,502 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 02:27:59,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ae1ef16b-58e4-4062-96b2-df3af1bef02c/bin/utaipan-UUZaoUuFF8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process