./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH --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 23c0dee81707c82be8d9645ea65556f17c2a25b7864c310b805b07f657c0bc23 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:31:11,830 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:31:11,832 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:31:11,861 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:31:11,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:31:11,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:31:11,864 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:31:11,866 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:31:11,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:31:11,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:31:11,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:31:11,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:31:11,873 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:31:11,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:31:11,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:31:11,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:31:11,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:31:11,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:31:11,882 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:31:11,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:31:11,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:31:11,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:31:11,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:31:11,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:31:11,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:31:11,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:31:11,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:31:11,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:31:11,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:31:11,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:31:11,900 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:31:11,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:31:11,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:31:11,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:31:11,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:31:11,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:31:11,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:31:11,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:31:11,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:31:11,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:31:11,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:31:11,909 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:31:11,934 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:31:11,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:31:11,936 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:31:11,936 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:31:11,936 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:31:11,937 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:31:11,937 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:31:11,937 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:31:11,938 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:31:11,938 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:31:11,938 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:31:11,939 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:31:11,939 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:31:11,940 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:31:11,940 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:31:11,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:31:11,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:31:11,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:31:11,942 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:31:11,942 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:31:11,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:31:11,943 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:31:11,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:31:11,943 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:31:11,944 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:31:11,944 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:31:11,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:31:11,945 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:31:11,945 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:31:11,946 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:31:11,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:31:11,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:31:11,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:31:11,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:31:11,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:31:11,948 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:31:11,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:31:11,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:31:11,949 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:31:11,949 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23c0dee81707c82be8d9645ea65556f17c2a25b7864c310b805b07f657c0bc23 [2021-11-03 05:31:12,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:31:12,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:31:12,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:31:12,263 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:31:12,264 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:31:12,265 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i [2021-11-03 05:31:12,341 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data/da305fdf0/37a58cb7e76c485581eb7a81cbdd1f88/FLAG622213b5a [2021-11-03 05:31:12,967 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:31:12,977 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i [2021-11-03 05:31:13,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data/da305fdf0/37a58cb7e76c485581eb7a81cbdd1f88/FLAG622213b5a [2021-11-03 05:31:13,189 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data/da305fdf0/37a58cb7e76c485581eb7a81cbdd1f88 [2021-11-03 05:31:13,192 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:31:13,194 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:31:13,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:13,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:31:13,199 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:31:13,200 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:13" (1/1) ... [2021-11-03 05:31:13,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@112b74e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:13, skipping insertion in model container [2021-11-03 05:31:13,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:13" (1/1) ... [2021-11-03 05:31:13,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:31:13,297 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:31:13,825 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[33021,33034] [2021-11-03 05:31:14,035 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44124,44137] [2021-11-03 05:31:14,038 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44245,44258] [2021-11-03 05:31:14,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:14,072 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) [2021-11-03 05:31:14,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41bcb3fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:14, skipping insertion in model container [2021-11-03 05:31:14,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:14,074 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:31:14,079 INFO L168 Benchmark]: Toolchain (without parser) took 881.68 ms. Allocated memory was 86.0 MB in the beginning and 140.5 MB in the end (delta: 54.5 MB). Free memory was 47.3 MB in the beginning and 106.5 MB in the end (delta: -59.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:31:14,079 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory is still 65.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:31:14,082 INFO L168 Benchmark]: CACSL2BoogieTranslator took 878.60 ms. Allocated memory was 86.0 MB in the beginning and 140.5 MB in the end (delta: 54.5 MB). Free memory was 47.1 MB in the beginning and 106.5 MB in the end (delta: -59.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:31:14,084 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 86.0 MB. Free memory is still 65.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 878.60 ms. Allocated memory was 86.0 MB in the beginning and 140.5 MB in the end (delta: 54.5 MB). Free memory was 47.1 MB in the beginning and 106.5 MB in the end (delta: -59.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 716]: 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH --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 23c0dee81707c82be8d9645ea65556f17c2a25b7864c310b805b07f657c0bc23 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:31:16,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:31:16,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:31:16,851 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:31:16,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:31:16,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:31:16,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:31:16,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:31:16,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:31:16,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:31:16,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:31:16,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:31:16,866 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:31:16,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:31:16,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:31:16,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:31:16,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:31:16,873 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:31:16,875 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:31:16,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:31:16,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:31:16,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:31:16,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:31:16,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:31:16,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:31:16,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:31:16,889 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:31:16,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:31:16,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:31:16,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:31:16,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:31:16,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:31:16,895 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:31:16,895 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:31:16,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:31:16,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:31:16,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:31:16,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:31:16,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:31:16,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:31:16,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:31:16,906 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:31:16,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:31:16,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:31:16,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:31:16,954 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:31:16,954 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:31:16,955 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:31:16,955 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:31:16,955 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:31:16,955 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:31:16,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:31:16,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:31:16,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:31:16,958 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:31:16,958 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:31:16,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:31:16,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:31:16,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:31:16,959 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:31:16,959 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:31:16,960 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:31:16,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:31:16,960 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:31:16,960 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:31:16,961 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:31:16,961 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:31:16,961 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:31:16,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:31:16,961 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:31:16,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:31:16,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:31:16,962 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:31:16,962 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:31:16,963 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:31:16,963 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:31:16,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:31:16,963 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:31:16,964 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23c0dee81707c82be8d9645ea65556f17c2a25b7864c310b805b07f657c0bc23 [2021-11-03 05:31:17,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:31:17,371 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:31:17,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:31:17,375 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:31:17,376 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:31:17,377 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i [2021-11-03 05:31:17,449 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data/c69703c07/bbcdf42acb20454481fcf8bcad5edbef/FLAG2297281a9 [2021-11-03 05:31:18,164 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:31:18,165 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i [2021-11-03 05:31:18,190 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data/c69703c07/bbcdf42acb20454481fcf8bcad5edbef/FLAG2297281a9 [2021-11-03 05:31:18,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/data/c69703c07/bbcdf42acb20454481fcf8bcad5edbef [2021-11-03 05:31:18,342 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:31:18,345 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:31:18,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:18,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:31:18,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:31:18,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:18" (1/1) ... [2021-11-03 05:31:18,355 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66431e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:18, skipping insertion in model container [2021-11-03 05:31:18,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:18" (1/1) ... [2021-11-03 05:31:18,368 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:31:18,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:31:19,128 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[33021,33034] [2021-11-03 05:31:19,348 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44124,44137] [2021-11-03 05:31:19,352 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44245,44258] [2021-11-03 05:31:19,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:19,398 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:31:19,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:31:19,461 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[33021,33034] [2021-11-03 05:31:19,569 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44124,44137] [2021-11-03 05:31:19,574 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44245,44258] [2021-11-03 05:31:19,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:19,591 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:31:19,659 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[33021,33034] [2021-11-03 05:31:19,769 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44124,44137] [2021-11-03 05:31:19,770 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_d44e60a5-b95f-4b6d-b755-853e85ae138a/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44245,44258] [2021-11-03 05:31:19,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:19,834 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:31:19,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19 WrapperNode [2021-11-03 05:31:19,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:19,837 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:31:19,837 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:31:19,838 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:31:19,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:19,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,006 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:31:20,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:31:20,007 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:31:20,007 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:31:20,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,161 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:31:20,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:31:20,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:31:20,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:31:20,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:20,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:31:20,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:31:20,199 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:31:20,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:31:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:31:20,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:31:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:31:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:31:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:31:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:31:20,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:31:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:31:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:31:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:31:20,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:31:20,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:31:25,575 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:31:25,575 INFO L299 CfgBuilder]: Removed 73 assume(true) statements. [2021-11-03 05:31:25,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:31:25 BoogieIcfgContainer [2021-11-03 05:31:25,578 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:31:25,580 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:31:25,580 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:31:25,583 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:31:25,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:31:18" (1/3) ... [2021-11-03 05:31:25,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11eed90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:31:25, skipping insertion in model container [2021-11-03 05:31:25,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19" (2/3) ... [2021-11-03 05:31:25,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11eed90b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:31:25, skipping insertion in model container [2021-11-03 05:31:25,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:31:25" (3/3) ... [2021-11-03 05:31:25,586 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test7-1.i [2021-11-03 05:31:25,591 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:31:25,591 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 530 error locations. [2021-11-03 05:31:25,635 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:31:25,640 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 [2021-11-03 05:31:25,641 INFO L340 AbstractCegarLoop]: Starting to check reachability of 530 error locations. [2021-11-03 05:31:25,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 1054 states, 523 states have (on average 2.2523900573613767) internal successors, (1178), 1053 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:31:25,689 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:25,689 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:31:25,689 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:25,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:25,695 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 05:31:25,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:25,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [988229984] [2021-11-03 05:31:25,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:25,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:25,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:25,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:25,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:31:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:25,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:31:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:25,919 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 [2021-11-03 05:31:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:25,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:25,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:25,959 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:25,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [988229984] [2021-11-03 05:31:25,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [988229984] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:25,960 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:25,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:31:25,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791183001] [2021-11-03 05:31:25,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:31:25,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:25,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:31:25,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:31:25,990 INFO L87 Difference]: Start difference. First operand has 1054 states, 523 states have (on average 2.2523900573613767) internal successors, (1178), 1053 states have internal predecessors, (1178), 0 states have call successors, (0), 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) [2021-11-03 05:31:27,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:27,610 INFO L93 Difference]: Finished difference Result 1045 states and 1100 transitions. [2021-11-03 05:31:27,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:31:27,612 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 [2021-11-03 05:31:27,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:27,634 INFO L225 Difference]: With dead ends: 1045 [2021-11-03 05:31:27,634 INFO L226 Difference]: Without dead ends: 1043 [2021-11-03 05:31:27,635 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 [2021-11-03 05:31:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-03 05:31:27,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1035. [2021-11-03 05:31:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 521 states have (on average 2.0940499040307103) internal successors, (1091), 1034 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:27,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1091 transitions. [2021-11-03 05:31:27,721 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1091 transitions. Word has length 3 [2021-11-03 05:31:27,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:27,722 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1091 transitions. [2021-11-03 05:31:27,722 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) [2021-11-03 05:31:27,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1091 transitions. [2021-11-03 05:31:27,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:31:27,722 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:27,722 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:31:27,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:27,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:27,937 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:27,938 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 05:31:27,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:27,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [283002820] [2021-11-03 05:31:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:27,939 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:27,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:27,941 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:27,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:31:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:28,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:31:28,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:28,079 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 [2021-11-03 05:31:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:28,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:28,140 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:28,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [283002820] [2021-11-03 05:31:28,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [283002820] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:28,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:28,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:31:28,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159475499] [2021-11-03 05:31:28,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:28,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:28,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:28,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:28,144 INFO L87 Difference]: Start difference. First operand 1035 states and 1091 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) [2021-11-03 05:31:33,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:33,324 INFO L93 Difference]: Finished difference Result 1500 states and 1588 transitions. [2021-11-03 05:31:33,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:33,326 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 [2021-11-03 05:31:33,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:33,345 INFO L225 Difference]: With dead ends: 1500 [2021-11-03 05:31:33,345 INFO L226 Difference]: Without dead ends: 1500 [2021-11-03 05:31:33,347 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 [2021-11-03 05:31:33,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-11-03 05:31:33,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1070. [2021-11-03 05:31:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 565 states have (on average 2.0707964601769913) internal successors, (1170), 1069 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:33,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1170 transitions. [2021-11-03 05:31:33,422 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1170 transitions. Word has length 3 [2021-11-03 05:31:33,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:33,423 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1170 transitions. [2021-11-03 05:31:33,423 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) [2021-11-03 05:31:33,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1170 transitions. [2021-11-03 05:31:33,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:31:33,424 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:33,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:31:33,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:33,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:33,637 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:33,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:33,638 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 05:31:33,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:33,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1133513749] [2021-11-03 05:31:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:33,641 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:33,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:33,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:33,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:31:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:31:33,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:33,805 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 [2021-11-03 05:31:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:33,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:33,849 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:33,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1133513749] [2021-11-03 05:31:33,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1133513749] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:33,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:33,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:31:33,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962507397] [2021-11-03 05:31:33,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:31:33,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:33,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:31:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:31:33,860 INFO L87 Difference]: Start difference. First operand 1070 states and 1170 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) [2021-11-03 05:31:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:35,836 INFO L93 Difference]: Finished difference Result 1400 states and 1525 transitions. [2021-11-03 05:31:35,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:31:35,837 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 [2021-11-03 05:31:35,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:35,844 INFO L225 Difference]: With dead ends: 1400 [2021-11-03 05:31:35,844 INFO L226 Difference]: Without dead ends: 1400 [2021-11-03 05:31:35,845 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 [2021-11-03 05:31:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-03 05:31:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1023. [2021-11-03 05:31:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 565 states have (on average 1.9823008849557522) internal successors, (1120), 1022 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:35,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1120 transitions. [2021-11-03 05:31:35,875 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1120 transitions. Word has length 8 [2021-11-03 05:31:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:35,876 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1120 transitions. [2021-11-03 05:31:35,876 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) [2021-11-03 05:31:35,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1120 transitions. [2021-11-03 05:31:35,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:31:35,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:35,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:31:35,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:36,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:36,091 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 05:31:36,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:36,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1148401744] [2021-11-03 05:31:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:36,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:36,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:36,094 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:36,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:31:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:36,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:31:36,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:36,256 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 [2021-11-03 05:31:36,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:36,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:36,392 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:36,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1148401744] [2021-11-03 05:31:36,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1148401744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:36,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:36,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:31:36,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791719897] [2021-11-03 05:31:36,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:36,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:36,394 INFO L87 Difference]: Start difference. First operand 1023 states and 1120 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) [2021-11-03 05:31:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:40,503 INFO L93 Difference]: Finished difference Result 1444 states and 1533 transitions. [2021-11-03 05:31:40,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:40,504 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 [2021-11-03 05:31:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:40,510 INFO L225 Difference]: With dead ends: 1444 [2021-11-03 05:31:40,511 INFO L226 Difference]: Without dead ends: 1444 [2021-11-03 05:31:40,511 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 [2021-11-03 05:31:40,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-11-03 05:31:40,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1013. [2021-11-03 05:31:40,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 565 states have (on average 1.9592920353982302) internal successors, (1107), 1012 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1107 transitions. [2021-11-03 05:31:40,535 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1107 transitions. Word has length 8 [2021-11-03 05:31:40,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:40,536 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1107 transitions. [2021-11-03 05:31:40,536 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) [2021-11-03 05:31:40,536 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1107 transitions. [2021-11-03 05:31:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:31:40,537 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:40,537 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:31:40,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:40,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:40,748 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr526ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash -945573268, now seen corresponding path program 1 times [2021-11-03 05:31:40,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:40,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152288346] [2021-11-03 05:31:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:40,750 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:40,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:40,751 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:40,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:31:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:40,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:31:40,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:40,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:41,050 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:41,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152288346] [2021-11-03 05:31:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152288346] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:41,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:41,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:31:41,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423806993] [2021-11-03 05:31:41,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:41,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:41,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:41,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:41,053 INFO L87 Difference]: Start difference. First operand 1013 states and 1107 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) [2021-11-03 05:31:41,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:41,908 INFO L93 Difference]: Finished difference Result 1460 states and 1586 transitions. [2021-11-03 05:31:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:31:41,910 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 [2021-11-03 05:31:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:41,921 INFO L225 Difference]: With dead ends: 1460 [2021-11-03 05:31:41,922 INFO L226 Difference]: Without dead ends: 1460 [2021-11-03 05:31:41,922 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 [2021-11-03 05:31:41,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-03 05:31:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1250. [2021-11-03 05:31:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 802 states have (on average 1.942643391521197) internal successors, (1558), 1249 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:41,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1558 transitions. [2021-11-03 05:31:41,962 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1558 transitions. Word has length 11 [2021-11-03 05:31:41,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:41,963 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1558 transitions. [2021-11-03 05:31:41,963 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) [2021-11-03 05:31:41,963 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1558 transitions. [2021-11-03 05:31:41,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-03 05:31:41,964 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:41,964 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:31:41,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:42,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:42,179 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr529ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:42,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:42,179 INFO L85 PathProgramCache]: Analyzing trace with hash 751999808, now seen corresponding path program 1 times [2021-11-03 05:31:42,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:42,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [174097482] [2021-11-03 05:31:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:42,181 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:42,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:42,184 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:42,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:31:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:42,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:31:42,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:42,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:31:42,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:31:42,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:31:42,556 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:31:42,556 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 [2021-11-03 05:31:42,662 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 05:31:42,662 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 [2021-11-03 05:31:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:42,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:42,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:42,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:42,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [174097482] [2021-11-03 05:31:42,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [174097482] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:42,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:42,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:31:42,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008476683] [2021-11-03 05:31:42,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:31:42,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:31:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:31:42,805 INFO L87 Difference]: Start difference. First operand 1250 states and 1558 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-11-03 05:31:45,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:45,862 INFO L93 Difference]: Finished difference Result 1606 states and 1973 transitions. [2021-11-03 05:31:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:45,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 12 [2021-11-03 05:31:45,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:45,873 INFO L225 Difference]: With dead ends: 1606 [2021-11-03 05:31:45,874 INFO L226 Difference]: Without dead ends: 1606 [2021-11-03 05:31:45,874 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:31:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-03 05:31:45,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1249. [2021-11-03 05:31:45,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 801 states have (on average 1.9425717852684146) internal successors, (1556), 1248 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1556 transitions. [2021-11-03 05:31:45,910 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1556 transitions. Word has length 12 [2021-11-03 05:31:45,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:45,910 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1556 transitions. [2021-11-03 05:31:45,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-11-03 05:31:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1556 transitions. [2021-11-03 05:31:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-03 05:31:45,912 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:45,912 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:31:45,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:46,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:46,126 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:46,127 INFO L85 PathProgramCache]: Analyzing trace with hash -520774338, now seen corresponding path program 1 times [2021-11-03 05:31:46,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:46,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025331177] [2021-11-03 05:31:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:46,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:46,129 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:46,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:31:46,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:46,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:31:46,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:46,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:46,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:46,478 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:46,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025331177] [2021-11-03 05:31:46,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025331177] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:46,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:46,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:31:46,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671758984] [2021-11-03 05:31:46,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:46,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:46,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:46,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:46,481 INFO L87 Difference]: Start difference. First operand 1249 states and 1556 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) [2021-11-03 05:31:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:46,512 INFO L93 Difference]: Finished difference Result 1189 states and 1470 transitions. [2021-11-03 05:31:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:31:46,513 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 [2021-11-03 05:31:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:46,521 INFO L225 Difference]: With dead ends: 1189 [2021-11-03 05:31:46,521 INFO L226 Difference]: Without dead ends: 1189 [2021-11-03 05:31:46,521 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 [2021-11-03 05:31:46,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-03 05:31:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2021-11-03 05:31:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 765 states have (on average 1.9215686274509804) internal successors, (1470), 1188 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1470 transitions. [2021-11-03 05:31:46,551 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1470 transitions. Word has length 18 [2021-11-03 05:31:46,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:46,552 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1470 transitions. [2021-11-03 05:31:46,552 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) [2021-11-03 05:31:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1470 transitions. [2021-11-03 05:31:46,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:31:46,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:46,559 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] [2021-11-03 05:31:46,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:46,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:46,773 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:46,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:46,773 INFO L85 PathProgramCache]: Analyzing trace with hash 2047030904, now seen corresponding path program 1 times [2021-11-03 05:31:46,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:46,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392124723] [2021-11-03 05:31:46,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:46,774 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:46,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:46,776 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:46,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:31:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:47,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:31:47,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:47,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:47,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:47,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392124723] [2021-11-03 05:31:47,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392124723] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:47,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:47,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:31:47,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592070684] [2021-11-03 05:31:47,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:31:47,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:31:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:31:47,124 INFO L87 Difference]: Start difference. First operand 1189 states and 1470 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) [2021-11-03 05:31:47,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:47,194 INFO L93 Difference]: Finished difference Result 1161 states and 1414 transitions. [2021-11-03 05:31:47,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:47,195 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 [2021-11-03 05:31:47,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:47,200 INFO L225 Difference]: With dead ends: 1161 [2021-11-03 05:31:47,201 INFO L226 Difference]: Without dead ends: 1161 [2021-11-03 05:31:47,201 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 [2021-11-03 05:31:47,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-11-03 05:31:47,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2021-11-03 05:31:47,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 749 states have (on average 1.8851802403204272) internal successors, (1412), 1158 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1412 transitions. [2021-11-03 05:31:47,228 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1412 transitions. Word has length 20 [2021-11-03 05:31:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:47,229 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1412 transitions. [2021-11-03 05:31:47,229 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) [2021-11-03 05:31:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1412 transitions. [2021-11-03 05:31:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:31:47,231 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:47,231 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] [2021-11-03 05:31:47,244 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-11-03 05:31:47,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:47,447 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:47,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:47,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589690, now seen corresponding path program 1 times [2021-11-03 05:31:47,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:47,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786764977] [2021-11-03 05:31:47,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:47,448 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:47,449 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:47,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:31:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:47,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:31:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:47,670 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 [2021-11-03 05:31:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:47,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:47,928 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:47,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786764977] [2021-11-03 05:31:47,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [786764977] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:47,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:47,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:31:47,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133271051] [2021-11-03 05:31:47,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:47,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:47,930 INFO L87 Difference]: Start difference. First operand 1159 states and 1412 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) [2021-11-03 05:31:49,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:49,800 INFO L93 Difference]: Finished difference Result 1622 states and 1995 transitions. [2021-11-03 05:31:49,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:31:49,800 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 [2021-11-03 05:31:49,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:49,806 INFO L225 Difference]: With dead ends: 1622 [2021-11-03 05:31:49,806 INFO L226 Difference]: Without dead ends: 1622 [2021-11-03 05:31:49,807 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 [2021-11-03 05:31:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-03 05:31:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1155. [2021-11-03 05:31:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 749 states have (on average 1.8744993324432577) internal successors, (1404), 1154 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:49,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1404 transitions. [2021-11-03 05:31:49,830 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1404 transitions. Word has length 34 [2021-11-03 05:31:49,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:49,830 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1404 transitions. [2021-11-03 05:31:49,831 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) [2021-11-03 05:31:49,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1404 transitions. [2021-11-03 05:31:49,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-03 05:31:49,832 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:49,832 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] [2021-11-03 05:31:49,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:50,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:50,044 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:50,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:50,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1406589689, now seen corresponding path program 1 times [2021-11-03 05:31:50,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:50,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1822812282] [2021-11-03 05:31:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:50,045 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:50,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:50,045 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:50,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:31:50,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:50,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:31:50,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:50,276 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 [2021-11-03 05:31:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:50,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:50,988 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:50,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1822812282] [2021-11-03 05:31:50,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1822812282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:50,988 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:50,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:31:50,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685824707] [2021-11-03 05:31:50,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:31:50,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:50,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:31:50,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:31:50,990 INFO L87 Difference]: Start difference. First operand 1155 states and 1404 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) [2021-11-03 05:31:57,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:57,120 INFO L93 Difference]: Finished difference Result 1755 states and 2150 transitions. [2021-11-03 05:31:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:31:57,121 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 [2021-11-03 05:31:57,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:57,132 INFO L225 Difference]: With dead ends: 1755 [2021-11-03 05:31:57,132 INFO L226 Difference]: Without dead ends: 1755 [2021-11-03 05:31:57,133 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:31:57,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-11-03 05:31:57,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1151. [2021-11-03 05:31:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 749 states have (on average 1.863818424566088) internal successors, (1396), 1150 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1396 transitions. [2021-11-03 05:31:57,163 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1396 transitions. Word has length 34 [2021-11-03 05:31:57,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:57,164 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1396 transitions. [2021-11-03 05:31:57,164 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) [2021-11-03 05:31:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1396 transitions. [2021-11-03 05:31:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:31:57,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:57,167 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] [2021-11-03 05:31:57,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:57,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:57,395 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:57,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:57,395 INFO L85 PathProgramCache]: Analyzing trace with hash -489765179, now seen corresponding path program 1 times [2021-11-03 05:31:57,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:57,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [984522691] [2021-11-03 05:31:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:57,397 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:57,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:57,398 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:57,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:31:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:57,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:31:57,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:57,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:58,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:58,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [984522691] [2021-11-03 05:31:58,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [984522691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:58,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:58,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:31:58,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639898846] [2021-11-03 05:31:58,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:58,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:58,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:58,042 INFO L87 Difference]: Start difference. First operand 1151 states and 1396 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) [2021-11-03 05:31:58,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:58,114 INFO L93 Difference]: Finished difference Result 1139 states and 1376 transitions. [2021-11-03 05:31:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:58,117 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 [2021-11-03 05:31:58,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:58,125 INFO L225 Difference]: With dead ends: 1139 [2021-11-03 05:31:58,125 INFO L226 Difference]: Without dead ends: 1139 [2021-11-03 05:31:58,125 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 [2021-11-03 05:31:58,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-03 05:31:58,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-11-03 05:31:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 737 states have (on average 1.8670284938941655) internal successors, (1376), 1138 states have internal predecessors, (1376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:58,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1376 transitions. [2021-11-03 05:31:58,153 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1376 transitions. Word has length 52 [2021-11-03 05:31:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:58,153 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1376 transitions. [2021-11-03 05:31:58,154 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) [2021-11-03 05:31:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1376 transitions. [2021-11-03 05:31:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:31:58,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:58,158 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] [2021-11-03 05:31:58,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:58,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:58,374 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr71REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:31:58,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:58,374 INFO L85 PathProgramCache]: Analyzing trace with hash -531678063, now seen corresponding path program 1 times [2021-11-03 05:31:58,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:58,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1933212066] [2021-11-03 05:31:58,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:58,376 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:58,376 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:58,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:31:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:58,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:31:58,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:58,782 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 [2021-11-03 05:31:58,787 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 [2021-11-03 05:31:59,514 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:31:59,515 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 28 treesize of output 30 [2021-11-03 05:31:59,533 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:31:59,533 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 27 treesize of output 23 [2021-11-03 05:31:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:59,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:04,737 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:04,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1933212066] [2021-11-03 05:32:04,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1933212066] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:04,737 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:04,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:32:04,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310677183] [2021-11-03 05:32:04,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:32:04,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:32:04,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:32:04,739 INFO L87 Difference]: Start difference. First operand 1139 states and 1376 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) [2021-11-03 05:32:20,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:20,466 INFO L93 Difference]: Finished difference Result 2090 states and 2635 transitions. [2021-11-03 05:32:20,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:32:20,467 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 [2021-11-03 05:32:20,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:20,475 INFO L225 Difference]: With dead ends: 2090 [2021-11-03 05:32:20,475 INFO L226 Difference]: Without dead ends: 2090 [2021-11-03 05:32:20,475 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 [2021-11-03 05:32:20,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-03 05:32:20,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1101. [2021-11-03 05:32:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 737 states have (on average 1.8154681139755766) internal successors, (1338), 1100 states have internal predecessors, (1338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:20,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1338 transitions. [2021-11-03 05:32:20,506 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1338 transitions. Word has length 60 [2021-11-03 05:32:20,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:20,506 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1338 transitions. [2021-11-03 05:32:20,507 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) [2021-11-03 05:32:20,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1338 transitions. [2021-11-03 05:32:20,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:32:20,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:20,514 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] [2021-11-03 05:32:20,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:20,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:20,728 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:32:20,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:20,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1426362414, now seen corresponding path program 1 times [2021-11-03 05:32:20,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:20,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427080995] [2021-11-03 05:32:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:20,730 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:20,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:20,730 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:20,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:32:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:21,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:32:21,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:21,235 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 [2021-11-03 05:32:21,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-03 05:32:21,293 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 [2021-11-03 05:32:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:21,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:21,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:21,485 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:21,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427080995] [2021-11-03 05:32:21,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427080995] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:21,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:21,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:32:21,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839473954] [2021-11-03 05:32:21,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:32:21,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:32:21,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:32:21,488 INFO L87 Difference]: Start difference. First operand 1101 states and 1338 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) [2021-11-03 05:32:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:26,261 INFO L93 Difference]: Finished difference Result 1761 states and 2127 transitions. [2021-11-03 05:32:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:32:26,261 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 [2021-11-03 05:32:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:26,271 INFO L225 Difference]: With dead ends: 1761 [2021-11-03 05:32:26,271 INFO L226 Difference]: Without dead ends: 1761 [2021-11-03 05:32:26,271 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:32:26,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2021-11-03 05:32:26,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1100. [2021-11-03 05:32:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 737 states have (on average 1.814111261872456) internal successors, (1337), 1099 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) [2021-11-03 05:32:26,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1337 transitions. [2021-11-03 05:32:26,293 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1337 transitions. Word has length 66 [2021-11-03 05:32:26,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:26,294 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1337 transitions. [2021-11-03 05:32:26,294 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) [2021-11-03 05:32:26,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1337 transitions. [2021-11-03 05:32:26,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-03 05:32:26,295 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:26,295 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] [2021-11-03 05:32:26,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:26,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:26,510 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:32:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1267561538, now seen corresponding path program 1 times [2021-11-03 05:32:26,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:26,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402133463] [2021-11-03 05:32:26,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:26,511 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:26,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:26,511 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:26,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:32:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:26,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:32:26,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:27,067 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 [2021-11-03 05:32:27,102 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 [2021-11-03 05:32:27,112 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 [2021-11-03 05:32:27,172 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 [2021-11-03 05:32:27,175 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 [2021-11-03 05:32:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:27,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:27,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:27,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402133463] [2021-11-03 05:32:27,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402133463] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:27,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:27,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:32:27,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185084067] [2021-11-03 05:32:27,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:32:27,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:27,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:32:27,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:32:27,763 INFO L87 Difference]: Start difference. First operand 1100 states and 1337 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) [2021-11-03 05:32:42,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:42,942 INFO L93 Difference]: Finished difference Result 1691 states and 2079 transitions. [2021-11-03 05:32:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:32:42,943 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 [2021-11-03 05:32:42,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:42,949 INFO L225 Difference]: With dead ends: 1691 [2021-11-03 05:32:42,949 INFO L226 Difference]: Without dead ends: 1691 [2021-11-03 05:32:42,950 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 [2021-11-03 05:32:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1691 states. [2021-11-03 05:32:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1691 to 1099. [2021-11-03 05:32:42,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 737 states have (on average 1.812754409769335) internal successors, (1336), 1098 states have internal predecessors, (1336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:42,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1336 transitions. [2021-11-03 05:32:42,966 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1336 transitions. Word has length 67 [2021-11-03 05:32:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:42,966 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1336 transitions. [2021-11-03 05:32:42,966 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) [2021-11-03 05:32:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1336 transitions. [2021-11-03 05:32:42,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-03 05:32:42,967 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:42,967 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] [2021-11-03 05:32:42,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:43,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:43,181 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:32:43,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:43,182 INFO L85 PathProgramCache]: Analyzing trace with hash -582276570, now seen corresponding path program 1 times [2021-11-03 05:32:43,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:43,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602954961] [2021-11-03 05:32:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:43,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:43,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:43,184 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:43,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:32:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:43,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:32:43,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:43,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:43,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:43,913 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:43,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1602954961] [2021-11-03 05:32:43,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1602954961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:43,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:43,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:32:43,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901055007] [2021-11-03 05:32:43,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:32:43,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:32:43,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:32:43,915 INFO L87 Difference]: Start difference. First operand 1099 states and 1336 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) [2021-11-03 05:32:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:44,094 INFO L93 Difference]: Finished difference Result 1849 states and 2273 transitions. [2021-11-03 05:32:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:32:44,095 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 [2021-11-03 05:32:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:44,101 INFO L225 Difference]: With dead ends: 1849 [2021-11-03 05:32:44,101 INFO L226 Difference]: Without dead ends: 1849 [2021-11-03 05:32:44,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:32:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2021-11-03 05:32:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1102. [2021-11-03 05:32:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1102 states, 740 states have (on average 1.8094594594594595) internal successors, (1339), 1101 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1339 transitions. [2021-11-03 05:32:44,118 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1339 transitions. Word has length 71 [2021-11-03 05:32:44,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:44,118 INFO L470 AbstractCegarLoop]: Abstraction has 1102 states and 1339 transitions. [2021-11-03 05:32:44,118 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) [2021-11-03 05:32:44,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1339 transitions. [2021-11-03 05:32:44,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:32:44,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:44,120 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] [2021-11-03 05:32:44,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:44,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:44,344 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:32:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:44,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1283072730, now seen corresponding path program 1 times [2021-11-03 05:32:44,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:44,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626093991] [2021-11-03 05:32:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:44,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:44,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:44,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:44,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:32:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:44,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:32:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:45,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:45,384 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:45,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626093991] [2021-11-03 05:32:45,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626093991] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:32:45,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [935124682] [2021-11-03 05:32:45,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:45,385 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:32:45,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:32:45,387 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:32:45,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-03 05:32:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:46,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:32:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:46,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:46,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:46,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [935124682] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:32:46,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175012416] [2021-11-03 05:32:46,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:46,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:32:46,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:32:46,367 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:32:46,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-03 05:32:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:46,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:32:46,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:47,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:47,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:47,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175012416] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:32:47,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:32:47,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:32:47,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549029651] [2021-11-03 05:32:47,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:32:47,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:32:47,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:32:47,273 INFO L87 Difference]: Start difference. First operand 1102 states and 1339 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:47,725 INFO L93 Difference]: Finished difference Result 1855 states and 2279 transitions. [2021-11-03 05:32:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:32:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2021-11-03 05:32:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:47,734 INFO L225 Difference]: With dead ends: 1855 [2021-11-03 05:32:47,734 INFO L226 Difference]: Without dead ends: 1855 [2021-11-03 05:32:47,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:32:47,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-11-03 05:32:47,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1108. [2021-11-03 05:32:47,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 746 states have (on average 1.8029490616621984) internal successors, (1345), 1107 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1345 transitions. [2021-11-03 05:32:47,749 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1345 transitions. Word has length 73 [2021-11-03 05:32:47,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:47,750 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1345 transitions. [2021-11-03 05:32:47,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:47,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1345 transitions. [2021-11-03 05:32:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-03 05:32:47,751 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:47,751 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] [2021-11-03 05:32:47,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:47,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:48,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:48,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:48,355 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:32:48,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:48,356 INFO L85 PathProgramCache]: Analyzing trace with hash -376896730, now seen corresponding path program 2 times [2021-11-03 05:32:48,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:48,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732971312] [2021-11-03 05:32:48,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:32:48,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:48,357 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:48,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:32:49,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:32:49,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:32:49,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:32:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:49,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:49,963 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:49,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732971312] [2021-11-03 05:32:49,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732971312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:32:49,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1823762704] [2021-11-03 05:32:49,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:32:49,964 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:32:49,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:32:49,972 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:32:49,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-03 05:32:51,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:32:51,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:32:51,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:32:51,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:51,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:51,546 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:51,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1823762704] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:32:51,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973325359] [2021-11-03 05:32:51,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:32:51,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:32:51,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:32:51,574 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:32:51,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-03 05:33:27,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:33:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:33:27,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:33:27,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:27,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:27,757 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:27,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973325359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:33:27,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:33:27,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 05:33:27,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244912764] [2021-11-03 05:33:27,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 05:33:27,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 05:33:27,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:33:27,760 INFO L87 Difference]: Start difference. First operand 1108 states and 1345 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) [2021-11-03 05:33:30,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:30,024 INFO L93 Difference]: Finished difference Result 1867 states and 2291 transitions. [2021-11-03 05:33:30,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 05:33:30,025 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 [2021-11-03 05:33:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:30,031 INFO L225 Difference]: With dead ends: 1867 [2021-11-03 05:33:30,031 INFO L226 Difference]: Without dead ends: 1867 [2021-11-03 05:33:30,032 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 440 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 05:33:30,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-11-03 05:33:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1120. [2021-11-03 05:33:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 758 states have (on average 1.7902374670184698) internal successors, (1357), 1119 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:30,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1357 transitions. [2021-11-03 05:33:30,047 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1357 transitions. Word has length 77 [2021-11-03 05:33:30,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:30,047 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1357 transitions. [2021-11-03 05:33:30,047 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) [2021-11-03 05:33:30,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1357 transitions. [2021-11-03 05:33:30,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-03 05:33:30,048 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:30,048 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] [2021-11-03 05:33:30,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:30,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:30,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:30,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 05:33:30,661 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr81REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 526 more)] === [2021-11-03 05:33:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash 688279334, now seen corresponding path program 3 times [2021-11-03 05:33:30,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:30,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1140766342] [2021-11-03 05:33:30,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:33:30,662 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:30,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:30,663 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:30,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:33:31,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 05:33:31,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:33:31,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:33:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:32,597 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:32,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:33,932 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:33,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1140766342] [2021-11-03 05:33:33,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1140766342] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:33:33,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1426051524] [2021-11-03 05:33:33,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:33:33,933 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:33:33,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:33:33,934 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:33:33,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-03 05:33:36,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 05:33:36,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:33:36,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-03 05:33:36,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:36,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:39,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1426051524] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:33:39,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759028375] [2021-11-03 05:33:39,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:33:39,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:33:39,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:33:39,958 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:33:39,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d44e60a5-b95f-4b6d-b755-853e85ae138a/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process