./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX --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 99f48cdcb9a25adc64e4307e90599f4e37a0b97f677ff29ab3d60f24a1c8e980 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:39:36,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:39:36,810 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:39:36,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:39:36,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:39:36,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:39:36,876 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:39:36,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:39:36,884 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:39:36,892 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:39:36,893 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:39:36,895 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:39:36,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:39:36,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:39:36,901 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:39:36,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:39:36,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:39:36,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:39:36,916 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:39:36,926 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:39:36,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:39:36,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:39:36,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:39:36,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:39:36,939 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:39:36,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:39:36,940 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:39:36,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:39:36,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:39:36,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:39:36,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:39:36,946 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:39:36,948 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:39:36,949 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:39:36,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:39:36,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:39:36,952 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:39:36,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:39:36,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:39:36,954 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:39:36,954 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:39:36,955 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 10:39:37,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:39:37,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:39:37,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:39:37,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:39:37,012 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:39:37,013 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:39:37,013 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:39:37,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:39:37,013 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:39:37,013 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:39:37,014 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:39:37,015 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:39:37,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:39:37,015 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:39:37,015 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:39:37,015 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:39:37,016 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:39:37,016 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:39:37,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:39:37,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:39:37,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:39:37,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:39:37,017 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:39:37,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:39:37,017 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:39:37,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:39:37,018 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:39:37,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:39:37,018 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:39:37,019 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99f48cdcb9a25adc64e4307e90599f4e37a0b97f677ff29ab3d60f24a1c8e980 [2021-11-09 10:39:37,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:39:37,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:39:37,317 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:39:37,319 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:39:37,320 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:39:37,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i [2021-11-09 10:39:37,401 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data/d13d4873f/2a63fcdc209b486484f5a710cfe78715/FLAG1a2f8ac8f [2021-11-09 10:39:38,159 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:39:38,161 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i [2021-11-09 10:39:38,181 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data/d13d4873f/2a63fcdc209b486484f5a710cfe78715/FLAG1a2f8ac8f [2021-11-09 10:39:38,316 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data/d13d4873f/2a63fcdc209b486484f5a710cfe78715 [2021-11-09 10:39:38,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:39:38,321 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:39:38,323 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:39:38,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:39:38,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:39:38,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:38" (1/1) ... [2021-11-09 10:39:38,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@782b6bcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:38, skipping insertion in model container [2021-11-09 10:39:38,330 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:38" (1/1) ... [2021-11-09 10:39:38,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:39:38,398 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:39:38,852 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[33021,33034] [2021-11-09 10:39:38,985 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[44124,44137] [2021-11-09 10:39:38,986 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[44245,44258] [2021-11-09 10:39:39,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:39:39,024 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) [2021-11-09 10:39:39,025 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4296edc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:39, skipping insertion in model container [2021-11-09 10:39:39,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:39:39,026 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.preprocessor [2021-11-09 10:39:39,032 INFO L168 Benchmark]: Toolchain (without parser) took 710.29 ms. Allocated memory is still 123.7 MB. Free memory was 91.3 MB in the beginning and 86.5 MB in the end (delta: 4.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:39:39,033 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory was 44.7 MB in the beginning and 44.6 MB in the end (delta: 62.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 10:39:39,034 INFO L168 Benchmark]: CACSL2BoogieTranslator took 703.11 ms. Allocated memory is still 123.7 MB. Free memory was 90.9 MB in the beginning and 86.5 MB in the end (delta: 4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 10:39:39,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 90.2 MB. Free memory was 44.7 MB in the beginning and 44.6 MB in the end (delta: 62.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 703.11 ms. Allocated memory is still 123.7 MB. Free memory was 90.9 MB in the beginning and 86.5 MB in the end (delta: 4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX --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 99f48cdcb9a25adc64e4307e90599f4e37a0b97f677ff29ab3d60f24a1c8e980 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:39:41,474 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:39:41,476 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:39:41,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:39:41,513 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:39:41,514 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:39:41,517 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:39:41,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:39:41,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:39:41,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:39:41,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:39:41,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:39:41,531 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:39:41,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:39:41,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:39:41,543 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:39:41,546 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:39:41,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:39:41,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:39:41,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:39:41,566 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:39:41,568 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:39:41,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:39:41,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:39:41,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:39:41,586 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:39:41,587 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:39:41,588 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:39:41,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:39:41,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:39:41,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:39:41,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:39:41,596 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:39:41,597 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:39:41,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:39:41,600 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:39:41,601 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:39:41,601 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:39:41,602 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:39:41,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:39:41,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:39:41,611 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-09 10:39:41,665 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:39:41,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:39:41,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:39:41,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:39:41,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:39:41,669 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:39:41,669 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:39:41,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:39:41,670 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:39:41,670 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:39:41,671 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:39:41,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:39:41,672 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:39:41,672 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:39:41,672 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:39:41,673 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:39:41,673 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:39:41,673 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:39:41,673 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-09 10:39:41,674 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-09 10:39:41,674 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:39:41,674 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:39:41,674 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:39:41,675 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:39:41,675 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:39:41,675 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:39:41,675 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:39:41,676 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:39:41,676 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-09 10:39:41,677 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-09 10:39:41,677 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:39:41,677 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-09 10:39:41,677 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99f48cdcb9a25adc64e4307e90599f4e37a0b97f677ff29ab3d60f24a1c8e980 [2021-11-09 10:39:42,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:39:42,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:39:42,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:39:42,137 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:39:42,138 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:39:42,141 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i [2021-11-09 10:39:42,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data/2cbdb9499/e737720210cc415ba57578baf43b7c03/FLAG4b1867988 [2021-11-09 10:39:43,065 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:39:43,072 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i [2021-11-09 10:39:43,104 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data/2cbdb9499/e737720210cc415ba57578baf43b7c03/FLAG4b1867988 [2021-11-09 10:39:43,219 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/data/2cbdb9499/e737720210cc415ba57578baf43b7c03 [2021-11-09 10:39:43,221 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:39:43,222 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:39:43,224 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:39:43,224 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:39:43,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:39:43,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:43" (1/1) ... [2021-11-09 10:39:43,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@350ed814 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:43, skipping insertion in model container [2021-11-09 10:39:43,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:39:43" (1/1) ... [2021-11-09 10:39:43,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:39:43,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:39:43,813 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[33021,33034] [2021-11-09 10:39:43,932 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[44124,44137] [2021-11-09 10:39:43,933 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[44245,44258] [2021-11-09 10:39:43,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:39:43,968 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-09 10:39:43,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:39:44,004 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[33021,33034] [2021-11-09 10:39:44,092 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[44124,44137] [2021-11-09 10:39:44,093 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[44245,44258] [2021-11-09 10:39:44,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:39:44,110 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:39:44,141 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[33021,33034] [2021-11-09 10:39:44,221 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[44124,44137] [2021-11-09 10:39:44,223 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_0d378f7b-3273-42ef-b0f3-c9da405abb4a/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test7-2.i[44245,44258] [2021-11-09 10:39:44,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:39:44,300 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:39:44,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44 WrapperNode [2021-11-09 10:39:44,301 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:39:44,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:39:44,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:39:44,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:39:44,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2021-11-09 10:39:44,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2021-11-09 10:39:44,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2021-11-09 10:39:44,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2021-11-09 10:39:44,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2021-11-09 10:39:44,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2021-11-09 10:39:44,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2021-11-09 10:39:44,609 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:39:44,611 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:39:44,611 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:39:44,611 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:39:44,612 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (1/1) ... [2021-11-09 10:39:44,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:39:44,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:39:44,673 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:39:44,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:39:44,728 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 10:39:44,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:39:44,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 10:39:44,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 10:39:44,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 10:39:44,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 10:39:44,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 10:39:44,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 10:39:44,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 10:39:44,735 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-09 10:39:44,735 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 10:39:44,735 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-09 10:39:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2021-11-09 10:39:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2021-11-09 10:39:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2021-11-09 10:39:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2021-11-09 10:39:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-09 10:39:44,736 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2021-11-09 10:39:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2021-11-09 10:39:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-11-09 10:39:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2021-11-09 10:39:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2021-11-09 10:39:44,737 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2021-11-09 10:39:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2021-11-09 10:39:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2021-11-09 10:39:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2021-11-09 10:39:44,738 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2021-11-09 10:39:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2021-11-09 10:39:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2021-11-09 10:39:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2021-11-09 10:39:44,739 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2021-11-09 10:39:44,740 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-09 10:39:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2021-11-09 10:39:44,741 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2021-11-09 10:39:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2021-11-09 10:39:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2021-11-09 10:39:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2021-11-09 10:39:44,742 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2021-11-09 10:39:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2021-11-09 10:39:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2021-11-09 10:39:44,743 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2021-11-09 10:39:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2021-11-09 10:39:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2021-11-09 10:39:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2021-11-09 10:39:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2021-11-09 10:39:44,744 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2021-11-09 10:39:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2021-11-09 10:39:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure index [2021-11-09 10:39:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2021-11-09 10:39:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2021-11-09 10:39:44,745 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2021-11-09 10:39:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2021-11-09 10:39:44,747 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2021-11-09 10:39:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2021-11-09 10:39:44,749 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2021-11-09 10:39:44,750 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2021-11-09 10:39:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2021-11-09 10:39:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2021-11-09 10:39:44,751 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2021-11-09 10:39:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2021-11-09 10:39:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2021-11-09 10:39:44,752 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2021-11-09 10:39:44,753 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2021-11-09 10:39:44,753 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 10:39:44,753 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 10:39:44,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 10:39:44,754 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 10:39:44,754 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 10:39:44,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 10:39:44,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 10:39:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 10:39:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 10:39:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 10:39:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 10:39:44,756 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 10:39:44,757 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 10:39:44,757 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 10:39:44,757 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 10:39:44,757 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 10:39:44,757 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 10:39:44,758 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 10:39:44,758 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 10:39:44,758 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 10:39:44,758 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 10:39:44,758 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 10:39:44,758 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 10:39:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 10:39:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 10:39:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 10:39:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 10:39:44,759 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 10:39:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 10:39:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 10:39:44,760 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 10:39:44,761 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 10:39:44,761 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 10:39:44,761 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 10:39:44,761 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 10:39:44,761 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 10:39:44,761 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 10:39:44,762 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 10:39:44,762 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 10:39:44,762 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 10:39:44,762 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 10:39:44,762 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 10:39:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 10:39:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 10:39:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 10:39:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 10:39:44,763 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 10:39:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 10:39:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 10:39:44,764 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 10:39:44,765 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 10:39:44,766 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 10:39:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 10:39:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 10:39:44,771 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 10:39:44,772 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 10:39:44,773 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 10:39:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 10:39:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 10:39:44,774 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 10:39:44,775 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 10:39:44,781 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 10:39:44,781 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 10:39:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 10:39:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 10:39:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 10:39:44,782 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 10:39:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 10:39:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 10:39:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 10:39:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 10:39:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 10:39:44,783 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 10:39:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 10:39:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 10:39:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 10:39:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 10:39:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 10:39:44,784 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 10:39:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 10:39:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 10:39:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 10:39:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 10:39:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 10:39:44,785 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 10:39:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 10:39:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 10:39:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 10:39:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 10:39:44,786 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 10:39:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 10:39:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 10:39:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 10:39:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 10:39:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 10:39:44,787 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 10:39:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 10:39:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 10:39:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 10:39:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 10:39:44,788 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 10:39:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 10:39:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 10:39:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 10:39:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 10:39:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 10:39:44,789 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 10:39:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 10:39:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 10:39:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 10:39:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 10:39:44,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:39:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-09 10:39:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 10:39:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:39:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-09 10:39:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-09 10:39:44,791 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-09 10:39:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:39:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:39:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-09 10:39:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:39:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 10:39:44,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-09 10:39:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:39:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-09 10:39:44,793 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-09 10:39:45,426 WARN L805 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-09 10:39:51,816 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:39:51,817 INFO L299 CfgBuilder]: Removed 72 assume(true) statements. [2021-11-09 10:39:51,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:51 BoogieIcfgContainer [2021-11-09 10:39:51,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:39:51,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:39:51,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:39:51,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:39:51,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:39:43" (1/3) ... [2021-11-09 10:39:51,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7173e119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:51, skipping insertion in model container [2021-11-09 10:39:51,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:39:44" (2/3) ... [2021-11-09 10:39:51,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7173e119 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:39:51, skipping insertion in model container [2021-11-09 10:39:51,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:39:51" (3/3) ... [2021-11-09 10:39:51,845 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test7-2.i [2021-11-09 10:39:51,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:39:51,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 636 error locations. [2021-11-09 10:39:51,906 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:39:51,914 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 [2021-11-09 10:39:51,914 INFO L340 AbstractCegarLoop]: Starting to check reachability of 636 error locations. [2021-11-09 10:39:51,962 INFO L276 IsEmpty]: Start isEmpty. Operand has 1254 states, 613 states have (on average 2.264274061990212) internal successors, (1388), 1245 states have internal predecessors, (1388), 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) [2021-11-09 10:39:51,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:39:51,970 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:51,971 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:51,972 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:39:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:51,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1781676235, now seen corresponding path program 1 times [2021-11-09 10:39:51,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:39:51,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1159076526] [2021-11-09 10:39:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:51,993 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:39:51,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:39:51,996 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:39:52,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-09 10:39:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:52,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:39:52,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:52,410 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 [2021-11-09 10:39:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:52,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:39:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:52,462 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:39:52,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1159076526] [2021-11-09 10:39:52,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1159076526] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:39:52,463 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:39:52,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:39:52,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040411494] [2021-11-09 10:39:52,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:39:52,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:39:52,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:39:52,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:39:52,517 INFO L87 Difference]: Start difference. First operand has 1254 states, 613 states have (on average 2.264274061990212) internal successors, (1388), 1245 states have internal predecessors, (1388), 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) [2021-11-09 10:39:55,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:39:55,436 INFO L93 Difference]: Finished difference Result 1422 states and 1497 transitions. [2021-11-09 10:39:55,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:39:55,441 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 [2021-11-09 10:39:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:39:55,468 INFO L225 Difference]: With dead ends: 1422 [2021-11-09 10:39:55,469 INFO L226 Difference]: Without dead ends: 1419 [2021-11-09 10:39:55,470 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 [2021-11-09 10:39:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2021-11-09 10:39:55,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1234. [2021-11-09 10:39:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 611 states have (on average 2.114566284779051) internal successors, (1292), 1226 states have internal predecessors, (1292), 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) [2021-11-09 10:39:55,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 1301 transitions. [2021-11-09 10:39:55,605 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 1301 transitions. Word has length 7 [2021-11-09 10:39:55,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:39:55,606 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 1301 transitions. [2021-11-09 10:39:55,606 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) [2021-11-09 10:39:55,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 1301 transitions. [2021-11-09 10:39:55,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 10:39:55,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:39:55,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:39:55,623 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-09 10:39:55,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:39:55,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:39:55,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:39:55,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1781676236, now seen corresponding path program 1 times [2021-11-09 10:39:55,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:39:55,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [829992529] [2021-11-09 10:39:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:39:55,826 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:39:55,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:39:55,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:39:55,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-09 10:39:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:39:56,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:39:56,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:39:56,098 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 [2021-11-09 10:39:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:56,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:39:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:39:56,210 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:39:56,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [829992529] [2021-11-09 10:39:56,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [829992529] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:39:56,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:39:56,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 10:39:56,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050263897] [2021-11-09 10:39:56,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:39:56,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:39:56,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:39:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:39:56,215 INFO L87 Difference]: Start difference. First operand 1234 states and 1301 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) [2021-11-09 10:40:02,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:02,881 INFO L93 Difference]: Finished difference Result 1898 states and 2008 transitions. [2021-11-09 10:40:02,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:40:02,881 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 [2021-11-09 10:40:02,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:02,894 INFO L225 Difference]: With dead ends: 1898 [2021-11-09 10:40:02,894 INFO L226 Difference]: Without dead ends: 1898 [2021-11-09 10:40:02,895 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 [2021-11-09 10:40:02,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2021-11-09 10:40:02,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1269. [2021-11-09 10:40:02,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1269 states, 655 states have (on average 2.0931297709923666) internal successors, (1371), 1261 states have internal predecessors, (1371), 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) [2021-11-09 10:40:02,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1269 states to 1269 states and 1380 transitions. [2021-11-09 10:40:02,940 INFO L78 Accepts]: Start accepts. Automaton has 1269 states and 1380 transitions. Word has length 7 [2021-11-09 10:40:02,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:02,941 INFO L470 AbstractCegarLoop]: Abstraction has 1269 states and 1380 transitions. [2021-11-09 10:40:02,941 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) [2021-11-09 10:40:02,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1269 states and 1380 transitions. [2021-11-09 10:40:02,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 10:40:02,942 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:02,942 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:02,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:03,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:03,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr6REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:03,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:03,156 INFO L85 PathProgramCache]: Analyzing trace with hash 280785758, now seen corresponding path program 1 times [2021-11-09 10:40:03,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:03,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [414772887] [2021-11-09 10:40:03,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:03,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:03,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:03,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:03,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-09 10:40:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:03,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:40:03,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:03,383 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 [2021-11-09 10:40:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:03,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:03,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:03,482 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:03,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [414772887] [2021-11-09 10:40:03,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [414772887] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:03,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:03,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-09 10:40:03,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732728526] [2021-11-09 10:40:03,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:40:03,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:03,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:40:03,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:40:03,485 INFO L87 Difference]: Start difference. First operand 1269 states and 1380 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) [2021-11-09 10:40:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:06,092 INFO L93 Difference]: Finished difference Result 1599 states and 1735 transitions. [2021-11-09 10:40:06,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:40:06,094 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 [2021-11-09 10:40:06,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:06,104 INFO L225 Difference]: With dead ends: 1599 [2021-11-09 10:40:06,104 INFO L226 Difference]: Without dead ends: 1599 [2021-11-09 10:40:06,104 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 [2021-11-09 10:40:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2021-11-09 10:40:06,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1222. [2021-11-09 10:40:06,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 655 states have (on average 2.016793893129771) internal successors, (1321), 1214 states have internal predecessors, (1321), 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) [2021-11-09 10:40:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1330 transitions. [2021-11-09 10:40:06,147 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1330 transitions. Word has length 12 [2021-11-09 10:40:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:06,148 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 1330 transitions. [2021-11-09 10:40:06,148 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) [2021-11-09 10:40:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1330 transitions. [2021-11-09 10:40:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-09 10:40:06,149 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:06,149 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:06,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:06,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:06,368 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr7REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:06,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:06,370 INFO L85 PathProgramCache]: Analyzing trace with hash 280785759, now seen corresponding path program 1 times [2021-11-09 10:40:06,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:06,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [983416499] [2021-11-09 10:40:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:06,372 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:06,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:06,373 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:06,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-09 10:40:06,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:40:06,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:06,661 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 [2021-11-09 10:40:06,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:06,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:06,835 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:06,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [983416499] [2021-11-09 10:40:06,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [983416499] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:06,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:06,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-09 10:40:06,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137209074] [2021-11-09 10:40:06,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:40:06,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:40:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:40:06,837 INFO L87 Difference]: Start difference. First operand 1222 states and 1330 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) [2021-11-09 10:40:12,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:12,307 INFO L93 Difference]: Finished difference Result 1643 states and 1743 transitions. [2021-11-09 10:40:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:40:12,308 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 [2021-11-09 10:40:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:12,319 INFO L225 Difference]: With dead ends: 1643 [2021-11-09 10:40:12,319 INFO L226 Difference]: Without dead ends: 1643 [2021-11-09 10:40:12,320 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 [2021-11-09 10:40:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1643 states. [2021-11-09 10:40:12,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1643 to 1212. [2021-11-09 10:40:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 655 states have (on average 1.9969465648854963) internal successors, (1308), 1204 states have internal predecessors, (1308), 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) [2021-11-09 10:40:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1317 transitions. [2021-11-09 10:40:12,356 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1317 transitions. Word has length 12 [2021-11-09 10:40:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:12,357 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1317 transitions. [2021-11-09 10:40:12,357 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) [2021-11-09 10:40:12,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1317 transitions. [2021-11-09 10:40:12,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 10:40:12,358 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:12,358 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:12,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:12,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:12,570 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr526ASSERT_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:12,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1790420342, now seen corresponding path program 1 times [2021-11-09 10:40:12,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:12,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614664449] [2021-11-09 10:40:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:12,572 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:12,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:12,573 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:12,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-09 10:40:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:12,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:40:12,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:12,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:12,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:13,066 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:13,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614664449] [2021-11-09 10:40:13,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614664449] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:13,067 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:13,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 10:40:13,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27492820] [2021-11-09 10:40:13,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:40:13,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:13,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:40:13,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:40:13,076 INFO L87 Difference]: Start difference. First operand 1212 states and 1317 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) [2021-11-09 10:40:14,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:14,261 INFO L93 Difference]: Finished difference Result 1855 states and 2002 transitions. [2021-11-09 10:40:14,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:40:14,262 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 [2021-11-09 10:40:14,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:14,273 INFO L225 Difference]: With dead ends: 1855 [2021-11-09 10:40:14,274 INFO L226 Difference]: Without dead ends: 1855 [2021-11-09 10:40:14,274 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 [2021-11-09 10:40:14,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2021-11-09 10:40:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1453. [2021-11-09 10:40:14,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 896 states have (on average 1.9676339285714286) internal successors, (1763), 1445 states have internal predecessors, (1763), 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) [2021-11-09 10:40:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 1772 transitions. [2021-11-09 10:40:14,318 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 1772 transitions. Word has length 15 [2021-11-09 10:40:14,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:14,319 INFO L470 AbstractCegarLoop]: Abstraction has 1453 states and 1772 transitions. [2021-11-09 10:40:14,319 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) [2021-11-09 10:40:14,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 1772 transitions. [2021-11-09 10:40:14,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:40:14,320 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:14,321 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:14,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:14,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:14,539 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr340REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:14,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:14,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2028654046, now seen corresponding path program 1 times [2021-11-09 10:40:14,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:14,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [717739070] [2021-11-09 10:40:14,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:14,541 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:14,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:14,542 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:14,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-09 10:40:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:40:14,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:14,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:14,858 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:14,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [717739070] [2021-11-09 10:40:14,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [717739070] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:14,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:14,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 10:40:14,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517572143] [2021-11-09 10:40:14,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:40:14,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:14,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:40:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:40:14,861 INFO L87 Difference]: Start difference. First operand 1453 states and 1772 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-11-09 10:40:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:14,918 INFO L93 Difference]: Finished difference Result 1615 states and 1920 transitions. [2021-11-09 10:40:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:40:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 17 [2021-11-09 10:40:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:14,927 INFO L225 Difference]: With dead ends: 1615 [2021-11-09 10:40:14,928 INFO L226 Difference]: Without dead ends: 1615 [2021-11-09 10:40:14,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:40:14,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-11-09 10:40:14,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1393. [2021-11-09 10:40:14,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 860 states have (on average 1.95) internal successors, (1677), 1385 states have internal predecessors, (1677), 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) [2021-11-09 10:40:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1686 transitions. [2021-11-09 10:40:14,964 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1686 transitions. Word has length 17 [2021-11-09 10:40:14,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:14,965 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1686 transitions. [2021-11-09 10:40:14,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) [2021-11-09 10:40:14,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1686 transitions. [2021-11-09 10:40:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-09 10:40:14,966 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:14,967 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:14,984 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:15,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:15,179 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr364REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:15,179 INFO L85 PathProgramCache]: Analyzing trace with hash -378587592, now seen corresponding path program 1 times [2021-11-09 10:40:15,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:15,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1210389686] [2021-11-09 10:40:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:15,180 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:15,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:15,181 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:15,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-09 10:40:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:15,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:40:15,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:15,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:15,506 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:15,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1210389686] [2021-11-09 10:40:15,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1210389686] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:15,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:15,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 10:40:15,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981355278] [2021-11-09 10:40:15,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:40:15,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:40:15,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:40:15,508 INFO L87 Difference]: Start difference. First operand 1393 states and 1686 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-11-09 10:40:15,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:15,575 INFO L93 Difference]: Finished difference Result 1587 states and 1864 transitions. [2021-11-09 10:40:15,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:40:15,575 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 19 [2021-11-09 10:40:15,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:15,584 INFO L225 Difference]: With dead ends: 1587 [2021-11-09 10:40:15,584 INFO L226 Difference]: Without dead ends: 1587 [2021-11-09 10:40:15,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:40:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-11-09 10:40:15,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1363. [2021-11-09 10:40:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 844 states have (on average 1.9182464454976302) internal successors, (1619), 1355 states have internal predecessors, (1619), 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) [2021-11-09 10:40:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 1628 transitions. [2021-11-09 10:40:15,631 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 1628 transitions. Word has length 19 [2021-11-09 10:40:15,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:15,632 INFO L470 AbstractCegarLoop]: Abstraction has 1363 states and 1628 transitions. [2021-11-09 10:40:15,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2021-11-09 10:40:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 1628 transitions. [2021-11-09 10:40:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:40:15,633 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:15,633 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:15,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-09 10:40:15,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:15,845 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr634ENSURES_VIOLATIONMEMORY_LEAK === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:15,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:15,846 INFO L85 PathProgramCache]: Analyzing trace with hash 269057696, now seen corresponding path program 1 times [2021-11-09 10:40:15,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:15,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1067117537] [2021-11-09 10:40:15,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:15,847 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:15,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:15,848 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:15,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-09 10:40:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:40:16,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:16,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:40:16,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:40:16,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:40:16,234 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-09 10:40:16,235 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 [2021-11-09 10:40:16,311 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-09 10:40:16,311 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 [2021-11-09 10:40:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:16,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:16,438 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:16,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1067117537] [2021-11-09 10:40:16,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1067117537] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:16,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:16,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 10:40:16,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023695516] [2021-11-09 10:40:16,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:40:16,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:16,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:40:16,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:40:16,441 INFO L87 Difference]: Start difference. First operand 1363 states and 1628 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-11-09 10:40:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:17,779 INFO L93 Difference]: Finished difference Result 1799 states and 2123 transitions. [2021-11-09 10:40:17,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:40:17,780 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 20 [2021-11-09 10:40:17,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:17,789 INFO L225 Difference]: With dead ends: 1799 [2021-11-09 10:40:17,790 INFO L226 Difference]: Without dead ends: 1799 [2021-11-09 10:40:17,790 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:40:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2021-11-09 10:40:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1362. [2021-11-09 10:40:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 843 states have (on average 1.9181494661921707) internal successors, (1617), 1354 states have internal predecessors, (1617), 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) [2021-11-09 10:40:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 1626 transitions. [2021-11-09 10:40:17,823 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 1626 transitions. Word has length 20 [2021-11-09 10:40:17,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:17,824 INFO L470 AbstractCegarLoop]: Abstraction has 1362 states and 1626 transitions. [2021-11-09 10:40:17,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-11-09 10:40:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 1626 transitions. [2021-11-09 10:40:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-09 10:40:17,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:17,825 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] [2021-11-09 10:40:17,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:18,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:18,038 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr14REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:18,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:18,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1911428918, now seen corresponding path program 1 times [2021-11-09 10:40:18,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:18,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928421956] [2021-11-09 10:40:18,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:18,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:18,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:18,055 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:18,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-09 10:40:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 10:40:18,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:18,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:18,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:18,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:18,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:18,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928421956] [2021-11-09 10:40:18,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928421956] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:18,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:18,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-09 10:40:18,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557739544] [2021-11-09 10:40:18,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:40:18,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:40:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:40:18,445 INFO L87 Difference]: Start difference. First operand 1362 states and 1626 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) [2021-11-09 10:40:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:18,467 INFO L93 Difference]: Finished difference Result 1302 states and 1540 transitions. [2021-11-09 10:40:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:40:18,478 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 [2021-11-09 10:40:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:18,484 INFO L225 Difference]: With dead ends: 1302 [2021-11-09 10:40:18,484 INFO L226 Difference]: Without dead ends: 1302 [2021-11-09 10:40:18,484 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 [2021-11-09 10:40:18,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states. [2021-11-09 10:40:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2021-11-09 10:40:18,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 807 states have (on average 1.8971499380421313) internal successors, (1531), 1294 states have internal predecessors, (1531), 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) [2021-11-09 10:40:18,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 1540 transitions. [2021-11-09 10:40:18,528 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 1540 transitions. Word has length 22 [2021-11-09 10:40:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:18,528 INFO L470 AbstractCegarLoop]: Abstraction has 1302 states and 1540 transitions. [2021-11-09 10:40:18,528 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) [2021-11-09 10:40:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 1540 transitions. [2021-11-09 10:40:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-09 10:40:18,531 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:18,531 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] [2021-11-09 10:40:18,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:18,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:18,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr38REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1362810308, now seen corresponding path program 1 times [2021-11-09 10:40:18,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:18,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2016310657] [2021-11-09 10:40:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:18,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:18,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:18,746 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:18,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-09 10:40:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:18,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:40:18,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:19,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:19,130 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:19,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2016310657] [2021-11-09 10:40:19,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2016310657] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:19,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:19,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-09 10:40:19,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626740471] [2021-11-09 10:40:19,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:40:19,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:40:19,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:40:19,135 INFO L87 Difference]: Start difference. First operand 1302 states and 1540 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) [2021-11-09 10:40:19,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:19,205 INFO L93 Difference]: Finished difference Result 1274 states and 1484 transitions. [2021-11-09 10:40:19,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:40:19,206 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 [2021-11-09 10:40:19,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:19,211 INFO L225 Difference]: With dead ends: 1274 [2021-11-09 10:40:19,211 INFO L226 Difference]: Without dead ends: 1274 [2021-11-09 10:40:19,211 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 [2021-11-09 10:40:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-09 10:40:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1272. [2021-11-09 10:40:19,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 791 states have (on average 1.8621997471554994) internal successors, (1473), 1264 states have internal predecessors, (1473), 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) [2021-11-09 10:40:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1482 transitions. [2021-11-09 10:40:19,239 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1482 transitions. Word has length 24 [2021-11-09 10:40:19,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:19,240 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1482 transitions. [2021-11-09 10:40:19,240 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) [2021-11-09 10:40:19,240 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1482 transitions. [2021-11-09 10:40:19,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:40:19,241 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:19,241 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] [2021-11-09 10:40:19,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:19,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:19,454 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr52REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:19,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:19,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1184485010, now seen corresponding path program 1 times [2021-11-09 10:40:19,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:19,455 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181755746] [2021-11-09 10:40:19,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:19,455 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:19,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:19,456 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:19,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-09 10:40:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:19,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:40:19,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:19,762 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 [2021-11-09 10:40:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:19,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:20,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:20,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:20,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181755746] [2021-11-09 10:40:20,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181755746] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:20,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:20,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-09 10:40:20,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67086394] [2021-11-09 10:40:20,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:40:20,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:40:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:40:20,059 INFO L87 Difference]: Start difference. First operand 1272 states and 1482 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) [2021-11-09 10:40:22,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:22,601 INFO L93 Difference]: Finished difference Result 1854 states and 2186 transitions. [2021-11-09 10:40:22,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:40:22,603 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 [2021-11-09 10:40:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:22,610 INFO L225 Difference]: With dead ends: 1854 [2021-11-09 10:40:22,614 INFO L226 Difference]: Without dead ends: 1854 [2021-11-09 10:40:22,615 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 [2021-11-09 10:40:22,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1854 states. [2021-11-09 10:40:22,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1854 to 1268. [2021-11-09 10:40:22,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 791 states have (on average 1.852085967130215) internal successors, (1465), 1260 states have internal predecessors, (1465), 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) [2021-11-09 10:40:22,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1474 transitions. [2021-11-09 10:40:22,641 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1474 transitions. Word has length 38 [2021-11-09 10:40:22,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:22,642 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 1474 transitions. [2021-11-09 10:40:22,642 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) [2021-11-09 10:40:22,642 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1474 transitions. [2021-11-09 10:40:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:40:22,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:22,646 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] [2021-11-09 10:40:22,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:22,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:22,858 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr53REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:22,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:22,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1184485011, now seen corresponding path program 1 times [2021-11-09 10:40:22,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:22,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313779782] [2021-11-09 10:40:22,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:22,860 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:22,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:22,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:22,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-09 10:40:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:23,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:40:23,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:23,206 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 [2021-11-09 10:40:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:23,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:24,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:24,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313779782] [2021-11-09 10:40:24,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313779782] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:24,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:24,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 10:40:24,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324763] [2021-11-09 10:40:24,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:40:24,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:24,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:40:24,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:40:24,067 INFO L87 Difference]: Start difference. First operand 1268 states and 1474 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) [2021-11-09 10:40:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:32,073 INFO L93 Difference]: Finished difference Result 1981 states and 2290 transitions. [2021-11-09 10:40:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:40:32,074 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 [2021-11-09 10:40:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:32,081 INFO L225 Difference]: With dead ends: 1981 [2021-11-09 10:40:32,082 INFO L226 Difference]: Without dead ends: 1981 [2021-11-09 10:40:32,082 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 [2021-11-09 10:40:32,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2021-11-09 10:40:32,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1264. [2021-11-09 10:40:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 791 states have (on average 1.8419721871049304) internal successors, (1457), 1256 states have internal predecessors, (1457), 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) [2021-11-09 10:40:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1466 transitions. [2021-11-09 10:40:32,107 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1466 transitions. Word has length 38 [2021-11-09 10:40:32,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:32,108 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1466 transitions. [2021-11-09 10:40:32,108 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) [2021-11-09 10:40:32,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1466 transitions. [2021-11-09 10:40:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-09 10:40:32,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:32,109 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] [2021-11-09 10:40:32,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:32,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:32,321 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr71REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:32,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:32,322 INFO L85 PathProgramCache]: Analyzing trace with hash -202104303, now seen corresponding path program 1 times [2021-11-09 10:40:32,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:32,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113516179] [2021-11-09 10:40:32,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:32,323 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:32,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:32,324 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:32,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-09 10:40:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:32,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:40:32,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:32,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:32,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:32,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113516179] [2021-11-09 10:40:32,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113516179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:32,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:32,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 10:40:32,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892709454] [2021-11-09 10:40:33,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:40:33,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:33,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:40:33,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:40:33,001 INFO L87 Difference]: Start difference. First operand 1264 states and 1466 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) [2021-11-09 10:40:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:33,063 INFO L93 Difference]: Finished difference Result 1252 states and 1446 transitions. [2021-11-09 10:40:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:40:33,064 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 [2021-11-09 10:40:33,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:33,071 INFO L225 Difference]: With dead ends: 1252 [2021-11-09 10:40:33,071 INFO L226 Difference]: Without dead ends: 1252 [2021-11-09 10:40:33,072 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 [2021-11-09 10:40:33,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-11-09 10:40:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1252. [2021-11-09 10:40:33,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 779 states have (on average 1.8446726572528884) internal successors, (1437), 1244 states have internal predecessors, (1437), 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) [2021-11-09 10:40:33,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1446 transitions. [2021-11-09 10:40:33,094 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1446 transitions. Word has length 56 [2021-11-09 10:40:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:33,095 INFO L470 AbstractCegarLoop]: Abstraction has 1252 states and 1446 transitions. [2021-11-09 10:40:33,095 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) [2021-11-09 10:40:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1446 transitions. [2021-11-09 10:40:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-09 10:40:33,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:33,097 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:40:33,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:40:33,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:33,310 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr71REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -981301539, now seen corresponding path program 1 times [2021-11-09 10:40:33,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:33,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058205713] [2021-11-09 10:40:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:33,312 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:33,312 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:33,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-09 10:40:33,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:40:33,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:33,814 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 [2021-11-09 10:40:33,820 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 [2021-11-09 10:40:34,636 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:40:34,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-09 10:40:34,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:40:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-09 10:40:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:34,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:39,758 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:39,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058205713] [2021-11-09 10:40:39,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058205713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:39,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:39,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-09 10:40:39,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873073897] [2021-11-09 10:40:39,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:40:39,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:39,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:40:39,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-09 10:40:39,760 INFO L87 Difference]: Start difference. First operand 1252 states and 1446 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) [2021-11-09 10:40:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:40:56,937 INFO L93 Difference]: Finished difference Result 2049 states and 2489 transitions. [2021-11-09 10:40:56,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:40:56,940 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 [2021-11-09 10:40:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:40:56,950 INFO L225 Difference]: With dead ends: 2049 [2021-11-09 10:40:56,950 INFO L226 Difference]: Without dead ends: 2049 [2021-11-09 10:40:56,951 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-09 10:40:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-11-09 10:40:56,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1214. [2021-11-09 10:40:56,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 779 states have (on average 1.7958921694480103) internal successors, (1399), 1206 states have internal predecessors, (1399), 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) [2021-11-09 10:40:56,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 1408 transitions. [2021-11-09 10:40:56,976 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 1408 transitions. Word has length 64 [2021-11-09 10:40:56,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:40:56,976 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 1408 transitions. [2021-11-09 10:40:56,977 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) [2021-11-09 10:40:56,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 1408 transitions. [2021-11-09 10:40:56,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 10:40:56,978 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:40:56,978 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] [2021-11-09 10:40:57,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-09 10:40:57,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:40:57,208 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr76REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:40:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:40:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1905768216, now seen corresponding path program 1 times [2021-11-09 10:40:57,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:40:57,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1093605726] [2021-11-09 10:40:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:40:57,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:40:57,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:40:57,211 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:40:57,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-09 10:40:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:40:57,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:40:57,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:40:57,978 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 [2021-11-09 10:40:57,995 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 [2021-11-09 10:40:58,031 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 [2021-11-09 10:40:58,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:58,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:40:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:40:58,247 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:40:58,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1093605726] [2021-11-09 10:40:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1093605726] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:40:58,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:40:58,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-09 10:40:58,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763963659] [2021-11-09 10:40:58,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:40:58,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:40:58,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:40:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:40:58,249 INFO L87 Difference]: Start difference. First operand 1214 states and 1408 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) [2021-11-09 10:41:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:02,002 INFO L93 Difference]: Finished difference Result 1213 states and 1407 transitions. [2021-11-09 10:41:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:41:02,002 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 [2021-11-09 10:41:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:02,008 INFO L225 Difference]: With dead ends: 1213 [2021-11-09 10:41:02,008 INFO L226 Difference]: Without dead ends: 1213 [2021-11-09 10:41:02,009 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:41:02,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-09 10:41:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1213. [2021-11-09 10:41:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 779 states have (on average 1.7946084724005136) internal successors, (1398), 1205 states have internal predecessors, (1398), 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) [2021-11-09 10:41:02,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1407 transitions. [2021-11-09 10:41:02,025 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1407 transitions. Word has length 69 [2021-11-09 10:41:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:02,025 INFO L470 AbstractCegarLoop]: Abstraction has 1213 states and 1407 transitions. [2021-11-09 10:41:02,026 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) [2021-11-09 10:41:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1407 transitions. [2021-11-09 10:41:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-09 10:41:02,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:02,027 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] [2021-11-09 10:41:02,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-09 10:41:02,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:41:02,262 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr77REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:41:02,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:02,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1905768215, now seen corresponding path program 1 times [2021-11-09 10:41:02,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:41:02,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1844725969] [2021-11-09 10:41:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:02,264 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:41:02,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:41:02,265 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:41:02,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-09 10:41:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:02,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 10:41:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:02,910 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 [2021-11-09 10:41:02,944 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 [2021-11-09 10:41:02,956 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 [2021-11-09 10:41:03,032 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 [2021-11-09 10:41:03,036 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 [2021-11-09 10:41:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:03,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:41:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:03,429 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:41:03,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1844725969] [2021-11-09 10:41:03,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1844725969] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:41:03,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:41:03,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-09 10:41:03,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798984039] [2021-11-09 10:41:03,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:41:03,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:41:03,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:41:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:41:03,431 INFO L87 Difference]: Start difference. First operand 1213 states and 1407 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) [2021-11-09 10:41:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:14,029 INFO L93 Difference]: Finished difference Result 1212 states and 1406 transitions. [2021-11-09 10:41:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:41:14,030 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 [2021-11-09 10:41:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:14,036 INFO L225 Difference]: With dead ends: 1212 [2021-11-09 10:41:14,036 INFO L226 Difference]: Without dead ends: 1212 [2021-11-09 10:41:14,036 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 [2021-11-09 10:41:14,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2021-11-09 10:41:14,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 1212. [2021-11-09 10:41:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1212 states, 778 states have (on average 1.7956298200514138) internal successors, (1397), 1204 states have internal predecessors, (1397), 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) [2021-11-09 10:41:14,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1212 states to 1212 states and 1406 transitions. [2021-11-09 10:41:14,057 INFO L78 Accepts]: Start accepts. Automaton has 1212 states and 1406 transitions. Word has length 69 [2021-11-09 10:41:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:14,057 INFO L470 AbstractCegarLoop]: Abstraction has 1212 states and 1406 transitions. [2021-11-09 10:41:14,057 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) [2021-11-09 10:41:14,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1212 states and 1406 transitions. [2021-11-09 10:41:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 10:41:14,058 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:14,058 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] [2021-11-09 10:41:14,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-09 10:41:14,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:41:14,272 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:41:14,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:14,273 INFO L85 PathProgramCache]: Analyzing trace with hash -566079697, now seen corresponding path program 1 times [2021-11-09 10:41:14,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:41:14,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517277681] [2021-11-09 10:41:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:14,273 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:41:14,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:41:14,274 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:41:14,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-09 10:41:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:14,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:41:14,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:14,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:41:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:15,191 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:41:15,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517277681] [2021-11-09 10:41:15,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517277681] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-09 10:41:15,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:41:15,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-09 10:41:15,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358491427] [2021-11-09 10:41:15,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:41:15,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:41:15,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:41:15,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:41:15,193 INFO L87 Difference]: Start difference. First operand 1212 states and 1406 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) [2021-11-09 10:41:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:15,297 INFO L93 Difference]: Finished difference Result 1222 states and 1419 transitions. [2021-11-09 10:41:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:41:15,297 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 [2021-11-09 10:41:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:15,305 INFO L225 Difference]: With dead ends: 1222 [2021-11-09 10:41:15,305 INFO L226 Difference]: Without dead ends: 1222 [2021-11-09 10:41:15,305 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 [2021-11-09 10:41:15,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-11-09 10:41:15,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1222. [2021-11-09 10:41:15,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 786 states have (on average 1.7926208651399491) internal successors, (1409), 1213 states have internal predecessors, (1409), 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) [2021-11-09 10:41:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 1419 transitions. [2021-11-09 10:41:15,333 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 1419 transitions. Word has length 77 [2021-11-09 10:41:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:15,334 INFO L470 AbstractCegarLoop]: Abstraction has 1222 states and 1419 transitions. [2021-11-09 10:41:15,334 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) [2021-11-09 10:41:15,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 1419 transitions. [2021-11-09 10:41:15,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-09 10:41:15,335 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:15,335 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] [2021-11-09 10:41:15,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-09 10:41:15,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:41:15,550 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:41:15,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash -191859729, now seen corresponding path program 1 times [2021-11-09 10:41:15,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:41:15,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2146765353] [2021-11-09 10:41:15,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:41:15,552 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:41:15,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:41:15,553 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:41:15,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-09 10:41:16,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:41:16,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-09 10:41:16,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:16,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:41:16,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:16,739 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:41:16,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2146765353] [2021-11-09 10:41:16,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2146765353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:41:16,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:16,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-09 10:41:16,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289606647] [2021-11-09 10:41:16,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:41:16,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:41:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:41:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:41:16,741 INFO L87 Difference]: Start difference. First operand 1222 states and 1419 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) [2021-11-09 10:41:17,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:17,164 INFO L93 Difference]: Finished difference Result 1236 states and 1437 transitions. [2021-11-09 10:41:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:41:17,165 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 [2021-11-09 10:41:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:17,169 INFO L225 Difference]: With dead ends: 1236 [2021-11-09 10:41:17,169 INFO L226 Difference]: Without dead ends: 1232 [2021-11-09 10:41:17,169 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 [2021-11-09 10:41:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2021-11-09 10:41:17,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1228. [2021-11-09 10:41:17,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 792 states have (on average 1.7891414141414141) internal successors, (1417), 1219 states have internal predecessors, (1417), 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) [2021-11-09 10:41:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 1427 transitions. [2021-11-09 10:41:17,193 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 1427 transitions. Word has length 79 [2021-11-09 10:41:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:17,193 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 1427 transitions. [2021-11-09 10:41:17,193 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) [2021-11-09 10:41:17,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 1427 transitions. [2021-11-09 10:41:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-09 10:41:17,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:17,195 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] [2021-11-09 10:41:17,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:17,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:41:17,409 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:41:17,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash -183095953, now seen corresponding path program 2 times [2021-11-09 10:41:17,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:41:17,410 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90079041] [2021-11-09 10:41:17,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 10:41:17,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:41:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:41:17,411 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:41:17,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-09 10:41:18,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 10:41:18,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:18,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:41:18,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:18,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:41:19,023 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:19,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:41:19,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90079041] [2021-11-09 10:41:19,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90079041] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:41:19,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:19,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-11-09 10:41:19,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663692668] [2021-11-09 10:41:19,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:41:19,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:41:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:41:19,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:41:19,025 INFO L87 Difference]: Start difference. First operand 1228 states and 1427 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) [2021-11-09 10:41:20,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:20,548 INFO L93 Difference]: Finished difference Result 1256 states and 1465 transitions. [2021-11-09 10:41:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:41:20,549 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 [2021-11-09 10:41:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:20,553 INFO L225 Difference]: With dead ends: 1256 [2021-11-09 10:41:20,554 INFO L226 Difference]: Without dead ends: 1252 [2021-11-09 10:41:20,554 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 [2021-11-09 10:41:20,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2021-11-09 10:41:20,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1240. [2021-11-09 10:41:20,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 804 states have (on average 1.7823383084577114) internal successors, (1433), 1231 states have internal predecessors, (1433), 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) [2021-11-09 10:41:20,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1443 transitions. [2021-11-09 10:41:20,578 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1443 transitions. Word has length 83 [2021-11-09 10:41:20,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:20,578 INFO L470 AbstractCegarLoop]: Abstraction has 1240 states and 1443 transitions. [2021-11-09 10:41:20,578 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) [2021-11-09 10:41:20,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1443 transitions. [2021-11-09 10:41:20,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-09 10:41:20,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:20,580 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] [2021-11-09 10:41:20,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:20,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:41:20,795 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:41:20,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:20,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1558749073, now seen corresponding path program 3 times [2021-11-09 10:41:20,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:41:20,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650787763] [2021-11-09 10:41:20,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 10:41:20,796 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:41:20,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:41:20,797 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:41:20,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-09 10:41:22,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-09 10:41:22,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:22,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-09 10:41:22,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:22,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:41:24,335 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:24,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:41:24,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650787763] [2021-11-09 10:41:24,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650787763] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:41:24,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:24,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-11-09 10:41:24,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639973646] [2021-11-09 10:41:24,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:41:24,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:41:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:41:24,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:41:24,339 INFO L87 Difference]: Start difference. First operand 1240 states and 1443 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) [2021-11-09 10:41:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:32,597 INFO L93 Difference]: Finished difference Result 1296 states and 1527 transitions. [2021-11-09 10:41:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:41:32,598 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 [2021-11-09 10:41:32,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:32,602 INFO L225 Difference]: With dead ends: 1296 [2021-11-09 10:41:32,602 INFO L226 Difference]: Without dead ends: 1290 [2021-11-09 10:41:32,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1377, Invalid=2783, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 10:41:32,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-11-09 10:41:32,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1264. [2021-11-09 10:41:32,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 828 states have (on average 1.7681159420289856) internal successors, (1464), 1255 states have internal predecessors, (1464), 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) [2021-11-09 10:41:32,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 1474 transitions. [2021-11-09 10:41:32,661 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 1474 transitions. Word has length 91 [2021-11-09 10:41:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:32,662 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 1474 transitions. [2021-11-09 10:41:32,663 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) [2021-11-09 10:41:32,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 1474 transitions. [2021-11-09 10:41:32,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-09 10:41:32,664 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:32,664 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] [2021-11-09 10:41:32,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:32,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:41:32,879 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:41:32,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:32,879 INFO L85 PathProgramCache]: Analyzing trace with hash -982464913, now seen corresponding path program 4 times [2021-11-09 10:41:32,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:41:32,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255027467] [2021-11-09 10:41:32,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 10:41:32,880 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:41:32,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:41:32,881 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:41:32,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-09 10:41:33,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 10:41:33,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:33,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-09 10:41:33,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:34,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-09 10:41:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:41:38,872 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-09 10:41:38,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255027467] [2021-11-09 10:41:38,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255027467] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-09 10:41:38,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:41:38,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2021-11-09 10:41:38,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706048864] [2021-11-09 10:41:38,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-09 10:41:38,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-09 10:41:38,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-09 10:41:38,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1000, Invalid=3290, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:41:38,876 INFO L87 Difference]: Start difference. First operand 1264 states and 1474 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) [2021-11-09 10:41:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:41:54,139 INFO L93 Difference]: Finished difference Result 1356 states and 1594 transitions. [2021-11-09 10:41:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-09 10:41:54,140 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 [2021-11-09 10:41:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:41:54,145 INFO L225 Difference]: With dead ends: 1356 [2021-11-09 10:41:54,145 INFO L226 Difference]: Without dead ends: 1352 [2021-11-09 10:41:54,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=4503, Invalid=14679, Unknown=0, NotChecked=0, Total=19182 [2021-11-09 10:41:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-11-09 10:41:54,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1294. [2021-11-09 10:41:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 858 states have (on average 1.75990675990676) internal successors, (1510), 1285 states have internal predecessors, (1510), 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) [2021-11-09 10:41:54,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 1520 transitions. [2021-11-09 10:41:54,207 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 1520 transitions. Word has length 107 [2021-11-09 10:41:54,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:41:54,208 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 1520 transitions. [2021-11-09 10:41:54,208 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) [2021-11-09 10:41:54,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 1520 transitions. [2021-11-09 10:41:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-09 10:41:54,209 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:41:54,209 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] [2021-11-09 10:41:54,231 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-09 10:41:54,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 [2021-11-09 10:41:54,431 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr80REQUIRES_VIOLATION === [__VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION (and 632 more)] === [2021-11-09 10:41:54,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:41:54,432 INFO L85 PathProgramCache]: Analyzing trace with hash -687593553, now seen corresponding path program 5 times [2021-11-09 10:41:54,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-09 10:41:54,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289107564] [2021-11-09 10:41:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 10:41:54,433 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-09 10:41:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat [2021-11-09 10:41:54,433 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-09 10:41:54,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0d378f7b-3273-42ef-b0f3-c9da405abb4a/bin/uautomizer-IVEQpCNsaX/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-09 10:41:56,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-09 10:41:56,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 10:41:56,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 10:41:56,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:41:56,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:41:56,453 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-09 10:41:56,453 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 20 treesize of output 27 [2021-11-09 10:41:56,512 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 [2021-11-09 10:41:56,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-11-09 10:53:01,937 WARN L207 SmtUtils]: Spent 5.41 s on a formula simplification that was a NOOP. DAG size: 79