./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 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.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_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23c0dee81707c82be8d9645ea65556f17c2a25b7864c310b805b07f657c0bc23 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:56:24,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:56:24,804 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:56:24,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:56:24,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:56:24,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:56:24,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:56:24,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:56:24,876 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:56:24,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:56:24,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:56:24,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:56:24,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:56:24,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:56:24,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:56:24,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:56:24,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:56:24,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:56:24,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:56:24,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:56:24,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:56:24,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:56:24,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:56:24,934 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:56:24,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:56:24,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:56:24,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:56:24,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:56:24,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:56:24,949 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:56:24,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:56:24,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:56:24,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:56:24,955 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:56:24,957 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:56:24,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:56:24,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:56:24,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:56:24,959 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:56:24,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:56:24,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:56:24,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-07 07:56:25,007 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:56:25,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:56:25,008 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:56:25,008 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:56:25,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:56:25,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:56:25,010 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:56:25,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:56:25,011 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:56:25,011 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:56:25,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:56:25,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:56:25,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:56:25,012 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:56:25,012 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:56:25,012 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:56:25,013 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:56:25,013 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:56:25,013 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:56:25,013 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:56:25,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:56:25,014 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:56:25,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:56:25,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:56:25,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:56:25,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:56:25,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:56:25,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:56:25,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:56:25,016 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23c0dee81707c82be8d9645ea65556f17c2a25b7864c310b805b07f657c0bc23 [2021-11-07 07:56:25,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:56:25,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:56:25,421 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:56:25,423 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:56:25,424 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:56:25,426 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i [2021-11-07 07:56:25,515 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data/132df35da/b8551980cc984ad5a6fb44c65f5bbbf6/FLAGd92c69c6b [2021-11-07 07:56:26,206 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:56:26,206 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i [2021-11-07 07:56:26,231 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data/132df35da/b8551980cc984ad5a6fb44c65f5bbbf6/FLAGd92c69c6b [2021-11-07 07:56:26,391 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data/132df35da/b8551980cc984ad5a6fb44c65f5bbbf6 [2021-11-07 07:56:26,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:56:26,395 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:56:26,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:56:26,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:56:26,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:56:26,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:56:26" (1/1) ... [2021-11-07 07:56:26,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e174b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:26, skipping insertion in model container [2021-11-07 07:56:26,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:56:26" (1/1) ... [2021-11-07 07:56:26,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:56:26,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:56:26,938 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[33021,33034] [2021-11-07 07:56:27,079 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44124,44137] [2021-11-07 07:56:27,081 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44245,44258] [2021-11-07 07:56:27,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:56:27,121 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-07 07:56:27,122 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6065148a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:27, skipping insertion in model container [2021-11-07 07:56:27,122 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:56:27,123 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-07 07:56:27,125 INFO L168 Benchmark]: Toolchain (without parser) took 729.25 ms. Allocated memory is still 109.1 MB. Free memory was 65.0 MB in the beginning and 74.0 MB in the end (delta: -9.1 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-07 07:56:27,126 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 109.1 MB. Free memory is still 83.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 07:56:27,127 INFO L168 Benchmark]: CACSL2BoogieTranslator took 726.04 ms. Allocated memory is still 109.1 MB. Free memory was 64.7 MB in the beginning and 74.0 MB in the end (delta: -9.3 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-07 07:56:27,129 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 109.1 MB. Free memory is still 83.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 726.04 ms. Allocated memory is still 109.1 MB. Free memory was 64.7 MB in the beginning and 74.0 MB in the end (delta: -9.3 MB). Peak memory consumption was 6.7 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/config/AutomizerMemDerefMemtrack.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_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 23c0dee81707c82be8d9645ea65556f17c2a25b7864c310b805b07f657c0bc23 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:56:29,578 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:56:29,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:56:29,624 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:56:29,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:56:29,627 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:56:29,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:56:29,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:56:29,634 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:56:29,635 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:56:29,637 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:56:29,638 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:56:29,639 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:56:29,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:56:29,643 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:56:29,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:56:29,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:56:29,647 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:56:29,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:56:29,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:56:29,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:56:29,679 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:56:29,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:56:29,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:56:29,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:56:29,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:56:29,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:56:29,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:56:29,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:56:29,696 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:56:29,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:56:29,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:56:29,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:56:29,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:56:29,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:56:29,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:56:29,710 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:56:29,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:56:29,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:56:29,712 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:56:29,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:56:29,714 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-07 07:56:29,750 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:56:29,750 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:56:29,750 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:56:29,750 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:56:29,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:56:29,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:56:29,752 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:56:29,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:56:29,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:56:29,752 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-07 07:56:29,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:56:29,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:56:29,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:56:29,753 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-07 07:56:29,753 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-07 07:56:29,753 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-07 07:56:29,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:56:29,753 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 07:56:29,753 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 07:56:29,753 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 07:56:29,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:56:29,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:56:29,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:56:29,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:56:29,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:56:29,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:56:29,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:56:29,754 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:56:29,755 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-07 07:56:29,755 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 07:56:29,755 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:56:29,755 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 07:56:29,756 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23c0dee81707c82be8d9645ea65556f17c2a25b7864c310b805b07f657c0bc23 [2021-11-07 07:56:30,197 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:56:30,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:56:30,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:56:30,241 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:56:30,242 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:56:30,243 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i [2021-11-07 07:56:30,343 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data/4061e2628/a06462d921df4f848735fa97831b33b1/FLAGcc00943c2 [2021-11-07 07:56:31,072 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:56:31,076 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i [2021-11-07 07:56:31,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data/4061e2628/a06462d921df4f848735fa97831b33b1/FLAGcc00943c2 [2021-11-07 07:56:31,227 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/data/4061e2628/a06462d921df4f848735fa97831b33b1 [2021-11-07 07:56:31,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:56:31,231 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-07 07:56:31,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:56:31,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:56:31,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:56:31,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:56:31" (1/1) ... [2021-11-07 07:56:31,247 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5492e5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:31, skipping insertion in model container [2021-11-07 07:56:31,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:56:31" (1/1) ... [2021-11-07 07:56:31,257 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:56:31,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:56:31,956 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[33021,33034] [2021-11-07 07:56:32,173 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44124,44137] [2021-11-07 07:56:32,174 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44245,44258] [2021-11-07 07:56:32,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:56:32,199 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 07:56:32,223 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:56:32,256 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[33021,33034] [2021-11-07 07:56:32,367 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44124,44137] [2021-11-07 07:56:32,369 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44245,44258] [2021-11-07 07:56:32,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:56:32,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:56:32,412 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[33021,33034] [2021-11-07 07:56:32,507 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44124,44137] [2021-11-07 07:56:32,510 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_c076dc48-d7f2-48f3-8050-eb848f1670aa/sv-benchmarks/c/uthash-2.0.2/uthash_OAT_test7-1.i[44245,44258] [2021-11-07 07:56:32,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:56:32,578 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:56:32,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32 WrapperNode [2021-11-07 07:56:32,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:56:32,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:56:32,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:56:32,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:56:32,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (1/1) ... [2021-11-07 07:56:32,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (1/1) ... [2021-11-07 07:56:32,633 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (1/1) ... [2021-11-07 07:56:32,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (1/1) ... [2021-11-07 07:56:32,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (1/1) ... [2021-11-07 07:56:32,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (1/1) ... [2021-11-07 07:56:32,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (1/1) ... [2021-11-07 07:56:32,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:56:32,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:56:32,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:56:32,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:56:32,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (1/1) ... [2021-11-07 07:56:32,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:56:32,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:32,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:56:32,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:56:32,863 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-07 07:56:32,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:56:32,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:56:32,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-07 07:56:32,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-07 07:56:32,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-07 07:56:32,866 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-07 07:56:32,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-07 07:56:32,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-07 07:56:32,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-07 07:56:32,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-07 07:56:32,867 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-07 07:56:32,867 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-07 07:56:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-07 07:56:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-07 07:56:32,868 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-07 07:56:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-07 07:56:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-07 07:56:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-07 07:56:32,869 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-07 07:56:32,870 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-07 07:56:32,870 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-07 07:56:32,870 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-07 07:56:32,870 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-07 07:56:32,870 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-07 07:56:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-07 07:56:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-07 07:56:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-07 07:56:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-07 07:56:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-07 07:56:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-07 07:56:32,873 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-07 07:56:32,873 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-07 07:56:32,873 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-07 07:56:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-07 07:56:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-07 07:56:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-07 07:56:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-07 07:56:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-07 07:56:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-07 07:56:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-07 07:56:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-07 07:56:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-07 07:56:32,875 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-07 07:56:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-07 07:56:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-07 07:56:32,876 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-07 07:56:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-07 07:56:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-07 07:56:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-07 07:56:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-07 07:56:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-07 07:56:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-07 07:56:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-07 07:56:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-07 07:56:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-07 07:56:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-07 07:56:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-07 07:56:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-07 07:56:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-07 07:56:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-07 07:56:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-07 07:56:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-07 07:56:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-07 07:56:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-07 07:56:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-07 07:56:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-07 07:56:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-07 07:56:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-07 07:56:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-07 07:56:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-07 07:56:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-07 07:56:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-07 07:56:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-07 07:56:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-07 07:56:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-07 07:56:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-07 07:56:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-07 07:56:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-07 07:56:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-07 07:56:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-07 07:56:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-07 07:56:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-07 07:56:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-07 07:56:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-07 07:56:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-07 07:56:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-07 07:56:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-07 07:56:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-07 07:56:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-07 07:56:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-07 07:56:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-07 07:56:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-07 07:56:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-07 07:56:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-07 07:56:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-07 07:56:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-07 07:56:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-07 07:56:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-07 07:56:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-07 07:56:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-07 07:56:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-07 07:56:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-07 07:56:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-07 07:56:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-07 07:56:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-07 07:56:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-07 07:56:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-07 07:56:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-07 07:56:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-07 07:56:32,893 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-07 07:56:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-07 07:56:32,894 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-07 07:56:32,895 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-07 07:56:32,896 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-07 07:56:32,899 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-07 07:56:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-07 07:56:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-07 07:56:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-07 07:56:32,900 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-07 07:56:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-07 07:56:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-07 07:56:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-07 07:56:32,901 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-07 07:56:32,908 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-07 07:56:32,908 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-07 07:56:32,908 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-07 07:56:32,909 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-07 07:56:32,909 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-07 07:56:32,914 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-07 07:56:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-07 07:56:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-07 07:56:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-07 07:56:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-07 07:56:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-07 07:56:32,915 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-07 07:56:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-07 07:56:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-07 07:56:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-07 07:56:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-07 07:56:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-07 07:56:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-07 07:56:32,916 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-07 07:56:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-07 07:56:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-07 07:56:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-07 07:56:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-07 07:56:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-07 07:56:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-07 07:56:32,917 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-07 07:56:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-07 07:56:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-07 07:56:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-07 07:56:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-07 07:56:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-07 07:56:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-07 07:56:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-07 07:56:32,918 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-07 07:56:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-07 07:56:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-07 07:56:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-07 07:56:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-07 07:56:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-07 07:56:32,919 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-07 07:56:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-07 07:56:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-07 07:56:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-07 07:56:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-07 07:56:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-07 07:56:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-07 07:56:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-07 07:56:32,920 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-07 07:56:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-07 07:56:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-07 07:56:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:56:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-07 07:56:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-07 07:56:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-07 07:56:32,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-07 07:56:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-07 07:56:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-07 07:56:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-07 07:56:32,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-07 07:56:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-07 07:56:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 07:56:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-07 07:56:32,924 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 07:56:32,925 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:56:32,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-07 07:56:32,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-07 07:56:33,483 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-07 07:56:38,432 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:56:38,433 INFO L299 CfgBuilder]: Removed 63 assume(true) statements. [2021-11-07 07:56:38,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:56:38 BoogieIcfgContainer [2021-11-07 07:56:38,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:56:38,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:56:38,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:56:38,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:56:38,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:56:31" (1/3) ... [2021-11-07 07:56:38,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e26970d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:56:38, skipping insertion in model container [2021-11-07 07:56:38,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:32" (2/3) ... [2021-11-07 07:56:38,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e26970d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:56:38, skipping insertion in model container [2021-11-07 07:56:38,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:56:38" (3/3) ... [2021-11-07 07:56:38,446 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_OAT_test7-1.i [2021-11-07 07:56:38,453 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:56:38,453 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 531 error locations. [2021-11-07 07:56:38,502 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:56:38,513 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-07 07:56:38,514 INFO L340 AbstractCegarLoop]: Starting to check reachability of 531 error locations. [2021-11-07 07:56:38,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 1055 states, 519 states have (on average 2.2524084778420037) internal successors, (1169), 1046 states have internal predecessors, (1169), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-07 07:56:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:56:38,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:38,591 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:38,592 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:56:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1952023556, now seen corresponding path program 1 times [2021-11-07 07:56:38,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:56:38,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [728135374] [2021-11-07 07:56:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:38,609 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:56:38,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:56:38,610 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:56:38,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 07:56:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:38,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:56:38,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:38,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:56:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:38,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:56:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:39,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:56:39,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [728135374] [2021-11-07 07:56:39,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [728135374] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:39,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:39,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:56:39,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140060261] [2021-11-07 07:56:39,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:56:39,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:56:39,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:56:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:56:39,081 INFO L87 Difference]: Start difference. First operand has 1055 states, 519 states have (on average 2.2524084778420037) internal successors, (1169), 1046 states have internal predecessors, (1169), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:41,359 INFO L93 Difference]: Finished difference Result 1046 states and 1101 transitions. [2021-11-07 07:56:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:56:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 07:56:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:41,387 INFO L225 Difference]: With dead ends: 1046 [2021-11-07 07:56:41,388 INFO L226 Difference]: Without dead ends: 1043 [2021-11-07 07:56:41,389 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:56:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2021-11-07 07:56:41,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 1035. [2021-11-07 07:56:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 517 states have (on average 2.09284332688588) internal successors, (1082), 1027 states have internal predecessors, (1082), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:56:41,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1091 transitions. [2021-11-07 07:56:41,500 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1091 transitions. Word has length 7 [2021-11-07 07:56:41,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:41,501 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1091 transitions. [2021-11-07 07:56:41,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1091 transitions. [2021-11-07 07:56:41,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-07 07:56:41,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:41,502 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:41,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:41,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:56:41,708 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:56:41,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:41,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1952023557, now seen corresponding path program 1 times [2021-11-07 07:56:41,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:56:41,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420340036] [2021-11-07 07:56:41,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:41,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:56:41,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:56:41,713 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:56:41,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 07:56:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:41,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:56:41,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:41,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:56:41,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:41,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:56:42,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:42,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:56:42,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420340036] [2021-11-07 07:56:42,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420340036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:42,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:42,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 07:56:42,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881064913] [2021-11-07 07:56:42,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:56:42,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:56:42,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:56:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:56:42,069 INFO L87 Difference]: Start difference. First operand 1035 states and 1091 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:47,754 INFO L93 Difference]: Finished difference Result 1500 states and 1588 transitions. [2021-11-07 07:56:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:56:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-07 07:56:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:47,763 INFO L225 Difference]: With dead ends: 1500 [2021-11-07 07:56:47,764 INFO L226 Difference]: Without dead ends: 1500 [2021-11-07 07:56:47,764 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:56:47,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2021-11-07 07:56:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1070. [2021-11-07 07:56:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 561 states have (on average 2.06951871657754) internal successors, (1161), 1062 states have internal predecessors, (1161), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:56:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1170 transitions. [2021-11-07 07:56:47,799 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1170 transitions. Word has length 7 [2021-11-07 07:56:47,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:47,799 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1170 transitions. [2021-11-07 07:56:47,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:47,800 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1170 transitions. [2021-11-07 07:56:47,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:56:47,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:47,801 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:47,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:48,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:56:48,006 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:56:48,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:48,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1548729403, now seen corresponding path program 1 times [2021-11-07 07:56:48,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:56:48,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928171961] [2021-11-07 07:56:48,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:48,011 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:56:48,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:56:48,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:56:48,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 07:56:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:48,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:56:48,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:48,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:56:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:48,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:56:48,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:48,312 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:56:48,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928171961] [2021-11-07 07:56:48,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928171961] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:48,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:48,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 07:56:48,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931384792] [2021-11-07 07:56:48,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:56:48,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:56:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:56:48,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:56:48,315 INFO L87 Difference]: Start difference. First operand 1070 states and 1170 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:50,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:50,531 INFO L93 Difference]: Finished difference Result 1400 states and 1525 transitions. [2021-11-07 07:56:50,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:56:50,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-07 07:56:50,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:50,540 INFO L225 Difference]: With dead ends: 1400 [2021-11-07 07:56:50,541 INFO L226 Difference]: Without dead ends: 1400 [2021-11-07 07:56:50,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:56:50,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-11-07 07:56:50,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1023. [2021-11-07 07:56:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 561 states have (on average 1.9803921568627452) internal successors, (1111), 1015 states have internal predecessors, (1111), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:56:50,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 1120 transitions. [2021-11-07 07:56:50,572 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 1120 transitions. Word has length 12 [2021-11-07 07:56:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:50,573 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 1120 transitions. [2021-11-07 07:56:50,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:50,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 1120 transitions. [2021-11-07 07:56:50,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:56:50,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:50,574 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:50,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:50,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:56:50,789 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:56:50,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:50,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1548729402, now seen corresponding path program 1 times [2021-11-07 07:56:50,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:56:50,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1063586848] [2021-11-07 07:56:50,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:50,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:56:50,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:56:50,793 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:56:50,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 07:56:50,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:50,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:56:50,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:51,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:56:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:51,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:56:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:51,166 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:56:51,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1063586848] [2021-11-07 07:56:51,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1063586848] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:51,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:51,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-07 07:56:51,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431749838] [2021-11-07 07:56:51,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:56:51,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:56:51,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:56:51,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:56:51,168 INFO L87 Difference]: Start difference. First operand 1023 states and 1120 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:55,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:55,892 INFO L93 Difference]: Finished difference Result 1444 states and 1533 transitions. [2021-11-07 07:56:55,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:56:55,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-07 07:56:55,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:55,901 INFO L225 Difference]: With dead ends: 1444 [2021-11-07 07:56:55,901 INFO L226 Difference]: Without dead ends: 1444 [2021-11-07 07:56:55,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:56:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2021-11-07 07:56:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1013. [2021-11-07 07:56:55,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 561 states have (on average 1.9572192513368984) internal successors, (1098), 1005 states have internal predecessors, (1098), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:56:55,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1107 transitions. [2021-11-07 07:56:55,931 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1107 transitions. Word has length 12 [2021-11-07 07:56:55,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:55,932 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 1107 transitions. [2021-11-07 07:56:55,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:55,933 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1107 transitions. [2021-11-07 07:56:55,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-07 07:56:55,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:55,934 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:55,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-07 07:56:56,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:56:56,151 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr526ASSERT_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:56:56,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:56,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1839245231, now seen corresponding path program 1 times [2021-11-07 07:56:56,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:56:56,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [886998077] [2021-11-07 07:56:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:56,154 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:56:56,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:56:56,155 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:56:56,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 07:56:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:56,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:56:56,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:56,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:56:56,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:56,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:56:56,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [886998077] [2021-11-07 07:56:56,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [886998077] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:56,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:56,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 07:56:56,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176916414] [2021-11-07 07:56:56,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:56:56,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:56:56,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:56:56,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:56:56,594 INFO L87 Difference]: Start difference. First operand 1013 states and 1107 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:57,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:57,360 INFO L93 Difference]: Finished difference Result 1460 states and 1586 transitions. [2021-11-07 07:56:57,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:56:57,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-07 07:56:57,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:57,368 INFO L225 Difference]: With dead ends: 1460 [2021-11-07 07:56:57,368 INFO L226 Difference]: Without dead ends: 1460 [2021-11-07 07:56:57,368 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:56:57,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-11-07 07:56:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1250. [2021-11-07 07:56:57,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 798 states have (on average 1.9411027568922306) internal successors, (1549), 1242 states have internal predecessors, (1549), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:56:57,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1558 transitions. [2021-11-07 07:56:57,417 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1558 transitions. Word has length 15 [2021-11-07 07:56:57,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:57,418 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1558 transitions. [2021-11-07 07:56:57,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1558 transitions. [2021-11-07 07:56:57,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:56:57,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:57,420 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:57,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:57,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:56:57,632 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr529ENSURES_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:56:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:57,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1182027384, now seen corresponding path program 1 times [2021-11-07 07:56:57,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:56:57,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834532454] [2021-11-07 07:56:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:57,633 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:56:57,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:56:57,634 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:56:57,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 07:56:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:57,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:56:57,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 07:56:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 07:56:57,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-07 07:56:57,938 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-07 07:56:57,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-07 07:56:58,007 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-07 07:56:58,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-07 07:56:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:58,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:56:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:58,120 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:56:58,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834532454] [2021-11-07 07:56:58,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834532454] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:58,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:58,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 07:56:58,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910864244] [2021-11-07 07:56:58,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:56:58,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:56:58,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:56:58,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:56:58,122 INFO L87 Difference]: Start difference. First operand 1250 states and 1558 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:59,427 INFO L93 Difference]: Finished difference Result 1606 states and 1973 transitions. [2021-11-07 07:56:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:56:59,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-07 07:56:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:59,436 INFO L225 Difference]: With dead ends: 1606 [2021-11-07 07:56:59,436 INFO L226 Difference]: Without dead ends: 1606 [2021-11-07 07:56:59,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:56:59,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2021-11-07 07:56:59,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1249. [2021-11-07 07:56:59,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 797 states have (on average 1.9410288582183186) internal successors, (1547), 1241 states have internal predecessors, (1547), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:56:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1556 transitions. [2021-11-07 07:56:59,467 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1556 transitions. Word has length 16 [2021-11-07 07:56:59,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:59,467 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1556 transitions. [2021-11-07 07:56:59,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:56:59,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1556 transitions. [2021-11-07 07:56:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:56:59,468 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:59,468 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:59,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:59,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:56:59,681 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr14REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:56:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:59,681 INFO L85 PathProgramCache]: Analyzing trace with hash 109421681, now seen corresponding path program 1 times [2021-11-07 07:56:59,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:56:59,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2141618515] [2021-11-07 07:56:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:59,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:56:59,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:56:59,683 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:56:59,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 07:56:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:59,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 07:56:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:00,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:00,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:00,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2141618515] [2021-11-07 07:57:00,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2141618515] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:00,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:00,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 07:57:00,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583653180] [2021-11-07 07:57:00,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:57:00,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:00,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:57:00,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:57:00,065 INFO L87 Difference]: Start difference. First operand 1249 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:00,095 INFO L93 Difference]: Finished difference Result 1189 states and 1470 transitions. [2021-11-07 07:57:00,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:57:00,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-11-07 07:57:00,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:00,101 INFO L225 Difference]: With dead ends: 1189 [2021-11-07 07:57:00,101 INFO L226 Difference]: Without dead ends: 1189 [2021-11-07 07:57:00,102 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:57:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2021-11-07 07:57:00,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2021-11-07 07:57:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 761 states have (on average 1.9198423127463864) internal successors, (1461), 1181 states have internal predecessors, (1461), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:57:00,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1470 transitions. [2021-11-07 07:57:00,152 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1470 transitions. Word has length 22 [2021-11-07 07:57:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:00,152 INFO L470 AbstractCegarLoop]: Abstraction has 1189 states and 1470 transitions. [2021-11-07 07:57:00,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:00,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1470 transitions. [2021-11-07 07:57:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:57:00,153 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:00,153 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] [2021-11-07 07:57:00,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:00,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:00,366 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr38REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:00,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:00,366 INFO L85 PathProgramCache]: Analyzing trace with hash 2075018155, now seen corresponding path program 1 times [2021-11-07 07:57:00,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:00,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505347634] [2021-11-07 07:57:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:00,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:00,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:00,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:00,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 07:57:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:00,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:57:00,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:00,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:00,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:00,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:00,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505347634] [2021-11-07 07:57:00,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505347634] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:00,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:00,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-07 07:57:00,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945126110] [2021-11-07 07:57:00,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:57:00,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:00,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:57:00,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:57:00,737 INFO L87 Difference]: Start difference. First operand 1189 states and 1470 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:00,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:00,825 INFO L93 Difference]: Finished difference Result 1161 states and 1414 transitions. [2021-11-07 07:57:00,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:57:00,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-07 07:57:00,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:00,831 INFO L225 Difference]: With dead ends: 1161 [2021-11-07 07:57:00,831 INFO L226 Difference]: Without dead ends: 1161 [2021-11-07 07:57:00,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:57:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2021-11-07 07:57:00,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1159. [2021-11-07 07:57:00,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1159 states, 745 states have (on average 1.8832214765100672) internal successors, (1403), 1151 states have internal predecessors, (1403), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:57:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1159 states to 1159 states and 1412 transitions. [2021-11-07 07:57:00,857 INFO L78 Accepts]: Start accepts. Automaton has 1159 states and 1412 transitions. Word has length 24 [2021-11-07 07:57:00,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:00,857 INFO L470 AbstractCegarLoop]: Abstraction has 1159 states and 1412 transitions. [2021-11-07 07:57:00,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:00,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1159 states and 1412 transitions. [2021-11-07 07:57:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:57:00,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:00,858 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] [2021-11-07 07:57:00,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:01,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:01,079 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr52REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:01,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:01,079 INFO L85 PathProgramCache]: Analyzing trace with hash 755457081, now seen corresponding path program 1 times [2021-11-07 07:57:01,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:01,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539760734] [2021-11-07 07:57:01,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:01,080 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:01,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:01,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:01,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 07:57:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:01,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:57:01,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:01,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:57:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:01,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:01,663 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:01,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539760734] [2021-11-07 07:57:01,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539760734] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:01,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:01,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 07:57:01,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250157289] [2021-11-07 07:57:01,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:57:01,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:01,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:57:01,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:57:01,665 INFO L87 Difference]: Start difference. First operand 1159 states and 1412 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:03,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:03,669 INFO L93 Difference]: Finished difference Result 1622 states and 1995 transitions. [2021-11-07 07:57:03,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:57:03,670 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-07 07:57:03,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:03,677 INFO L225 Difference]: With dead ends: 1622 [2021-11-07 07:57:03,677 INFO L226 Difference]: Without dead ends: 1622 [2021-11-07 07:57:03,677 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:57:03,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-11-07 07:57:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1155. [2021-11-07 07:57:03,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 745 states have (on average 1.8724832214765101) internal successors, (1395), 1147 states have internal predecessors, (1395), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:57:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1404 transitions. [2021-11-07 07:57:03,705 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1404 transitions. Word has length 38 [2021-11-07 07:57:03,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:03,706 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1404 transitions. [2021-11-07 07:57:03,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:03,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1404 transitions. [2021-11-07 07:57:03,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:57:03,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:03,708 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] [2021-11-07 07:57:03,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:03,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:03,921 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr53REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:03,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:03,921 INFO L85 PathProgramCache]: Analyzing trace with hash 755457082, now seen corresponding path program 1 times [2021-11-07 07:57:03,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:03,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1090345219] [2021-11-07 07:57:03,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:03,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:03,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:03,922 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:03,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 07:57:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:04,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:57:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:04,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:57:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:04,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:05,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:05,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1090345219] [2021-11-07 07:57:05,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1090345219] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:05,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:05,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 07:57:05,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302150082] [2021-11-07 07:57:05,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:57:05,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:05,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:57:05,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:57:05,035 INFO L87 Difference]: Start difference. First operand 1155 states and 1404 transitions. Second operand has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:11,437 INFO L93 Difference]: Finished difference Result 1755 states and 2150 transitions. [2021-11-07 07:57:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:57:11,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-07 07:57:11,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:11,448 INFO L225 Difference]: With dead ends: 1755 [2021-11-07 07:57:11,448 INFO L226 Difference]: Without dead ends: 1755 [2021-11-07 07:57:11,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:57:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1755 states. [2021-11-07 07:57:11,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1755 to 1151. [2021-11-07 07:57:11,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 745 states have (on average 1.861744966442953) internal successors, (1387), 1143 states have internal predecessors, (1387), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:57:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1396 transitions. [2021-11-07 07:57:11,481 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1396 transitions. Word has length 38 [2021-11-07 07:57:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:11,481 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1396 transitions. [2021-11-07 07:57:11,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.0) internal successors, (65), 6 states have internal predecessors, (65), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:11,482 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1396 transitions. [2021-11-07 07:57:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:57:11,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:11,489 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] [2021-11-07 07:57:11,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:11,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:11,699 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr71REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:11,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:11,699 INFO L85 PathProgramCache]: Analyzing trace with hash -81906696, now seen corresponding path program 1 times [2021-11-07 07:57:11,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:11,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [167736347] [2021-11-07 07:57:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:11,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:11,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:11,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:11,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 07:57:12,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:57:12,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:12,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:12,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:12,365 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:12,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [167736347] [2021-11-07 07:57:12,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [167736347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:12,366 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:12,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 07:57:12,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620907594] [2021-11-07 07:57:12,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 07:57:12,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:12,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 07:57:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-07 07:57:12,367 INFO L87 Difference]: Start difference. First operand 1151 states and 1396 transitions. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:12,431 INFO L93 Difference]: Finished difference Result 1139 states and 1376 transitions. [2021-11-07 07:57:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:57:12,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-11-07 07:57:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:12,438 INFO L225 Difference]: With dead ends: 1139 [2021-11-07 07:57:12,438 INFO L226 Difference]: Without dead ends: 1139 [2021-11-07 07:57:12,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:57:12,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-07 07:57:12,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1139. [2021-11-07 07:57:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1139 states, 733 states have (on average 1.86493860845839) internal successors, (1367), 1131 states have internal predecessors, (1367), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:57:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1139 states to 1139 states and 1376 transitions. [2021-11-07 07:57:12,461 INFO L78 Accepts]: Start accepts. Automaton has 1139 states and 1376 transitions. Word has length 56 [2021-11-07 07:57:12,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:12,461 INFO L470 AbstractCegarLoop]: Abstraction has 1139 states and 1376 transitions. [2021-11-07 07:57:12,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1139 states and 1376 transitions. [2021-11-07 07:57:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:57:12,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:12,463 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] [2021-11-07 07:57:12,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-07 07:57:12,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:12,683 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr71REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:12,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1472971204, now seen corresponding path program 1 times [2021-11-07 07:57:12,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:12,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337304691] [2021-11-07 07:57:12,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:12,686 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:12,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:12,687 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:12,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 07:57:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:13,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:57:13,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:13,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:57:13,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:57:14,048 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-07 07:57:14,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-07 07:57:14,071 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-07 07:57:14,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-07 07:57:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:14,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:19,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:19,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337304691] [2021-11-07 07:57:19,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337304691] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:19,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:19,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-07 07:57:19,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390518245] [2021-11-07 07:57:19,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:57:19,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:19,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:57:19,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-07 07:57:19,405 INFO L87 Difference]: Start difference. First operand 1139 states and 1376 transitions. Second operand has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:36,544 INFO L93 Difference]: Finished difference Result 2090 states and 2635 transitions. [2021-11-07 07:57:36,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:57:36,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-11-07 07:57:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:36,553 INFO L225 Difference]: With dead ends: 2090 [2021-11-07 07:57:36,554 INFO L226 Difference]: Without dead ends: 2090 [2021-11-07 07:57:36,554 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-07 07:57:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-11-07 07:57:36,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1101. [2021-11-07 07:57:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 733 states have (on average 1.8130968622100956) internal successors, (1329), 1093 states have internal predecessors, (1329), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:57:36,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1338 transitions. [2021-11-07 07:57:36,579 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1338 transitions. Word has length 64 [2021-11-07 07:57:36,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:36,580 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 1338 transitions. [2021-11-07 07:57:36,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 23.4) internal successors, (117), 6 states have internal predecessors, (117), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:36,580 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1338 transitions. [2021-11-07 07:57:36,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:57:36,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:36,581 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:36,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-11-07 07:57:36,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:36,795 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr76REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -2063415711, now seen corresponding path program 1 times [2021-11-07 07:57:36,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:36,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1083100021] [2021-11-07 07:57:36,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:36,797 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:36,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:36,798 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:36,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 07:57:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:37,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:57:37,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:37,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:57:37,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-07 07:57:37,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-07 07:57:37,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:37,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:37,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:37,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1083100021] [2021-11-07 07:57:37,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1083100021] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:37,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:37,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-07 07:57:37,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572380907] [2021-11-07 07:57:37,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:57:37,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:37,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:57:37,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:57:37,643 INFO L87 Difference]: Start difference. First operand 1101 states and 1338 transitions. Second operand has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:40,453 INFO L93 Difference]: Finished difference Result 1100 states and 1337 transitions. [2021-11-07 07:57:40,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:57:40,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-11-07 07:57:40,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:40,460 INFO L225 Difference]: With dead ends: 1100 [2021-11-07 07:57:40,460 INFO L226 Difference]: Without dead ends: 1100 [2021-11-07 07:57:40,460 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:57:40,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-11-07 07:57:40,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1100. [2021-11-07 07:57:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 733 states have (on average 1.8117326057298773) internal successors, (1328), 1092 states have internal predecessors, (1328), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:57:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 1337 transitions. [2021-11-07 07:57:40,479 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 1337 transitions. Word has length 69 [2021-11-07 07:57:40,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:40,479 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 1337 transitions. [2021-11-07 07:57:40,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 16.5) internal successors, (66), 5 states have internal predecessors, (66), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:40,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 1337 transitions. [2021-11-07 07:57:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 07:57:40,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:40,481 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:40,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:40,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:40,695 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr77REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:40,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2063415710, now seen corresponding path program 1 times [2021-11-07 07:57:40,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:40,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [936295603] [2021-11-07 07:57:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:40,696 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:40,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:40,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 07:57:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:41,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:57:41,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:41,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:57:41,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-07 07:57:41,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-07 07:57:41,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-07 07:57:41,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-07 07:57:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:41,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:41,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:41,771 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:41,771 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [936295603] [2021-11-07 07:57:41,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [936295603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:41,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:41,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-07 07:57:41,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575908015] [2021-11-07 07:57:41,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:57:41,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:41,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:57:41,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:57:41,773 INFO L87 Difference]: Start difference. First operand 1100 states and 1337 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:51,109 INFO L93 Difference]: Finished difference Result 1099 states and 1336 transitions. [2021-11-07 07:57:51,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:57:51,110 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2021-11-07 07:57:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:51,114 INFO L225 Difference]: With dead ends: 1099 [2021-11-07 07:57:51,114 INFO L226 Difference]: Without dead ends: 1099 [2021-11-07 07:57:51,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:57:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-11-07 07:57:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 1099. [2021-11-07 07:57:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 732 states have (on average 1.8128415300546448) internal successors, (1327), 1091 states have internal predecessors, (1327), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-07 07:57:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1336 transitions. [2021-11-07 07:57:51,131 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1336 transitions. Word has length 69 [2021-11-07 07:57:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:51,131 INFO L470 AbstractCegarLoop]: Abstraction has 1099 states and 1336 transitions. [2021-11-07 07:57:51,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 8 states have internal predecessors, (73), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-07 07:57:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1336 transitions. [2021-11-07 07:57:51,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 07:57:51,133 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:51,133 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:51,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:51,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:51,348 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:51,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1040597000, now seen corresponding path program 1 times [2021-11-07 07:57:51,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:51,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1659181432] [2021-11-07 07:57:51,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:51,349 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:51,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:51,350 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:51,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 07:57:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:51,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:57:51,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:52,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:52,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:52,220 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:52,221 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1659181432] [2021-11-07 07:57:52,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1659181432] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 07:57:52,221 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:57:52,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 07:57:52,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326495541] [2021-11-07 07:57:52,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:57:52,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:57:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:57:52,223 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:57:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:52,322 INFO L93 Difference]: Finished difference Result 1109 states and 1349 transitions. [2021-11-07 07:57:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:57:52,323 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 77 [2021-11-07 07:57:52,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:52,331 INFO L225 Difference]: With dead ends: 1109 [2021-11-07 07:57:52,331 INFO L226 Difference]: Without dead ends: 1109 [2021-11-07 07:57:52,331 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:57:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-11-07 07:57:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1109. [2021-11-07 07:57:52,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 740 states have (on average 1.8094594594594595) internal successors, (1339), 1100 states have internal predecessors, (1339), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 07:57:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1349 transitions. [2021-11-07 07:57:52,354 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1349 transitions. Word has length 77 [2021-11-07 07:57:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:52,355 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 1349 transitions. [2021-11-07 07:57:52,355 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:57:52,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1349 transitions. [2021-11-07 07:57:52,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 07:57:52,356 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:52,356 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:52,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-07 07:57:52,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:52,571 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:52,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:52,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1778063432, now seen corresponding path program 1 times [2021-11-07 07:57:52,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:52,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [186067692] [2021-11-07 07:57:52,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:52,573 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:52,574 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:52,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-07 07:57:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:53,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:57:53,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:53,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:53,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:53,794 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:53,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [186067692] [2021-11-07 07:57:53,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [186067692] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:57:53,795 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:53,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-07 07:57:53,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955302891] [2021-11-07 07:57:53,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:57:53,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:53,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:57:53,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:57:53,796 INFO L87 Difference]: Start difference. First operand 1109 states and 1349 transitions. Second operand has 10 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:57:54,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:54,251 INFO L93 Difference]: Finished difference Result 1123 states and 1367 transitions. [2021-11-07 07:57:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:57:54,252 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 79 [2021-11-07 07:57:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:54,257 INFO L225 Difference]: With dead ends: 1123 [2021-11-07 07:57:54,257 INFO L226 Difference]: Without dead ends: 1119 [2021-11-07 07:57:54,257 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:57:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-11-07 07:57:54,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1115. [2021-11-07 07:57:54,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 746 states have (on average 1.8056300268096515) internal successors, (1347), 1106 states have internal predecessors, (1347), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 07:57:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1357 transitions. [2021-11-07 07:57:54,276 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1357 transitions. Word has length 79 [2021-11-07 07:57:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:54,276 INFO L470 AbstractCegarLoop]: Abstraction has 1115 states and 1357 transitions. [2021-11-07 07:57:54,276 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:57:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1357 transitions. [2021-11-07 07:57:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-07 07:57:54,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:54,277 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:54,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:54,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:54,492 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:54,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1701419208, now seen corresponding path program 2 times [2021-11-07 07:57:54,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:54,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660441307] [2021-11-07 07:57:54,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:57:54,493 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:54,494 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:54,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 07:57:55,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:57:55,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:57:55,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:55,484 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:55,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:57:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:56,021 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:57:56,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660441307] [2021-11-07 07:57:56,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660441307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:57:56,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:56,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-07 07:57:56,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423015717] [2021-11-07 07:57:56,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:57:56,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:57:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:57:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:57:56,025 INFO L87 Difference]: Start difference. First operand 1115 states and 1357 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 18 states have internal predecessors, (87), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:57:57,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:57,475 INFO L93 Difference]: Finished difference Result 1143 states and 1395 transitions. [2021-11-07 07:57:57,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:57:57,475 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 83 [2021-11-07 07:57:57,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:57,481 INFO L225 Difference]: With dead ends: 1143 [2021-11-07 07:57:57,481 INFO L226 Difference]: Without dead ends: 1139 [2021-11-07 07:57:57,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=457, Invalid=949, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:57:57,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-11-07 07:57:57,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1127. [2021-11-07 07:57:57,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 758 states have (on average 1.7981530343007917) internal successors, (1363), 1118 states have internal predecessors, (1363), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 07:57:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1373 transitions. [2021-11-07 07:57:57,500 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1373 transitions. Word has length 83 [2021-11-07 07:57:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:57,500 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1373 transitions. [2021-11-07 07:57:57,501 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:57:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1373 transitions. [2021-11-07 07:57:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 07:57:57,502 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:57,502 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, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:57,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-07 07:57:57,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:57:57,718 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:57:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:57,719 INFO L85 PathProgramCache]: Analyzing trace with hash 331995592, now seen corresponding path program 3 times [2021-11-07 07:57:57,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:57:57,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1232697781] [2021-11-07 07:57:57,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:57:57,719 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:57:57,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:57:57,720 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:57:57,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-07 07:57:58,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 07:57:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:59,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:57:59,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:59,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:58:01,265 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:01,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:58:01,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1232697781] [2021-11-07 07:58:01,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1232697781] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:58:01,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:01,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-07 07:58:01,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267819166] [2021-11-07 07:58:01,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:58:01,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:58:01,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:58:01,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:58:01,269 INFO L87 Difference]: Start difference. First operand 1127 states and 1373 transitions. Second operand has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:58:09,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:09,006 INFO L93 Difference]: Finished difference Result 1183 states and 1457 transitions. [2021-11-07 07:58:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:58:09,007 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 91 [2021-11-07 07:58:09,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:09,013 INFO L225 Difference]: With dead ends: 1183 [2021-11-07 07:58:09,013 INFO L226 Difference]: Without dead ends: 1177 [2021-11-07 07:58:09,015 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1377, Invalid=2783, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:58:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2021-11-07 07:58:09,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1151. [2021-11-07 07:58:09,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 782 states have (on average 1.7826086956521738) internal successors, (1394), 1142 states have internal predecessors, (1394), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 07:58:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1404 transitions. [2021-11-07 07:58:09,038 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1404 transitions. Word has length 91 [2021-11-07 07:58:09,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:09,039 INFO L470 AbstractCegarLoop]: Abstraction has 1151 states and 1404 transitions. [2021-11-07 07:58:09,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.0294117647058822) internal successors, (103), 34 states have internal predecessors, (103), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:58:09,039 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1404 transitions. [2021-11-07 07:58:09,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 07:58:09,040 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:09,040 INFO L513 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:09,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:09,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:58:09,257 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:58:09,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:09,257 INFO L85 PathProgramCache]: Analyzing trace with hash -770221112, now seen corresponding path program 4 times [2021-11-07 07:58:09,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:58:09,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958844480] [2021-11-07 07:58:09,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:58:09,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:58:09,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:58:09,258 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:58:09,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 07:58:10,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:58:10,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:10,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:58:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:11,364 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:11,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 07:58:15,255 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:15,255 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 07:58:15,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958844480] [2021-11-07 07:58:15,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958844480] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 07:58:15,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:15,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-07 07:58:15,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867338973] [2021-11-07 07:58:15,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:58:15,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-07 07:58:15,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:58:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:58:15,262 INFO L87 Difference]: Start difference. First operand 1151 states and 1404 transitions. Second operand has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:58:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:30,784 INFO L93 Difference]: Finished difference Result 1243 states and 1524 transitions. [2021-11-07 07:58:30,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-07 07:58:30,785 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 107 [2021-11-07 07:58:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:30,791 INFO L225 Difference]: With dead ends: 1243 [2021-11-07 07:58:30,791 INFO L226 Difference]: Without dead ends: 1239 [2021-11-07 07:58:30,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=4503, Invalid=14679, Unknown=0, NotChecked=0, Total=19182 [2021-11-07 07:58:30,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2021-11-07 07:58:30,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1181. [2021-11-07 07:58:30,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1181 states, 812 states have (on average 1.7733990147783252) internal successors, (1440), 1172 states have internal predecessors, (1440), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-07 07:58:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1181 states to 1181 states and 1450 transitions. [2021-11-07 07:58:30,845 INFO L78 Accepts]: Start accepts. Automaton has 1181 states and 1450 transitions. Word has length 107 [2021-11-07 07:58:30,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:30,845 INFO L470 AbstractCegarLoop]: Abstraction has 1181 states and 1450 transitions. [2021-11-07 07:58:30,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 66 states have internal predecessors, (135), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-07 07:58:30,846 INFO L276 IsEmpty]: Start isEmpty. Operand 1181 states and 1450 transitions. [2021-11-07 07:58:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 07:58:30,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:30,847 INFO L513 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:30,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:31,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 [2021-11-07 07:58:31,063 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 527 more)] === [2021-11-07 07:58:31,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:31,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1054827912, now seen corresponding path program 5 times [2021-11-07 07:58:31,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-07 07:58:31,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198091726] [2021-11-07 07:58:31,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:58:31,065 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 07:58:31,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat [2021-11-07 07:58:31,066 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 07:58:31,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-07 07:58:32,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-07 07:58:32,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:32,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 07:58:32,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:32,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-07 07:58:33,061 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-07 07:58:33,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-07 07:58:33,099 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 27 treesize of output 23 [2021-11-07 07:58:33,280 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 40 treesize of output 28 [2021-11-07 08:09:16,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2021-11-07 08:09:16,458 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2021-11-07 08:09:16,459 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-07 08:09:16,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198091726] [2021-11-07 08:09:16,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2021-11-07 08:09:16,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [298597933] [2021-11-07 08:09:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:09:16,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 08:09:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/cvc4 [2021-11-07 08:09:16,461 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 08:09:16,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-07 08:10:14,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-07 08:10:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:14,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 08:10:14,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:14,860 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken [2021-11-07 08:10:14,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155525210] [2021-11-07 08:10:14,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:10:14,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:14,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:14,862 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:14,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c076dc48-d7f2-48f3-8050-eb848f1670aa/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process