./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:31:18,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:31:18,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:31:18,553 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:31:18,554 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:31:18,555 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:31:18,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:31:18,560 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:31:18,562 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:31:18,563 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:31:18,565 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:31:18,566 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:31:18,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:31:18,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:31:18,570 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:31:18,571 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:31:18,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:31:18,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:31:18,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:31:18,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:31:18,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:31:18,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:31:18,587 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:31:18,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:31:18,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:31:18,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:31:18,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:31:18,604 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:31:18,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:31:18,606 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:31:18,607 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:31:18,608 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:31:18,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:31:18,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:31:18,613 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:31:18,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:31:18,615 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:31:18,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:31:18,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:31:18,617 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:31:18,618 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:31:18,619 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:31:18,660 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:31:18,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:31:18,662 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:31:18,662 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:31:18,662 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:31:18,663 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:31:18,663 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:31:18,663 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:31:18,663 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:31:18,664 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:31:18,665 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:31:18,665 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:31:18,665 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:31:18,665 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:31:18,666 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:31:18,666 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:31:18,666 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:31:18,667 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:31:18,667 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:31:18,667 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:31:18,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:31:18,668 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:31:18,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:31:18,668 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:31:18,668 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:31:18,668 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:31:18,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:31:18,670 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:31:18,671 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:31:18,671 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:31:18,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:31:18,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:31:18,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:31:18,672 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:31:18,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:31:18,672 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:31:18,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:31:18,673 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:31:18,673 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:31:18,673 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2021-11-03 05:31:18,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:31:18,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:31:18,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:31:18,979 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:31:18,981 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:31:18,982 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-03 05:31:19,064 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data/24661a78f/e25cebd80808414e92cc6bfb6e97bfbd/FLAG9dcb480c9 [2021-11-03 05:31:19,765 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:31:19,765 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-03 05:31:19,798 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data/24661a78f/e25cebd80808414e92cc6bfb6e97bfbd/FLAG9dcb480c9 [2021-11-03 05:31:19,900 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data/24661a78f/e25cebd80808414e92cc6bfb6e97bfbd [2021-11-03 05:31:19,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:31:19,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:31:19,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:19,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:31:19,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:31:19,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:19,914 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e1acb01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:19, skipping insertion in model container [2021-11-03 05:31:19,914 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:19" (1/1) ... [2021-11-03 05:31:19,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:31:19,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:31:20,421 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_fea36c60-88b3-4c80-b9ac-432444a927bc/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-03 05:31:20,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:20,672 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-03 05:31:20,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@357f4011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:20, skipping insertion in model container [2021-11-03 05:31:20,673 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:20,674 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:31:20,676 INFO L168 Benchmark]: Toolchain (without parser) took 770.41 ms. Allocated memory is still 127.9 MB. Free memory was 90.6 MB in the beginning and 84.0 MB in the end (delta: 6.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:31:20,677 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory was 56.3 MB in the beginning and 56.3 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:31:20,678 INFO L168 Benchmark]: CACSL2BoogieTranslator took 767.79 ms. Allocated memory is still 127.9 MB. Free memory was 90.4 MB in the beginning and 84.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-03 05:31:20,680 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory was 56.3 MB in the beginning and 56.3 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 767.79 ms. Allocated memory is still 127.9 MB. Free memory was 90.4 MB in the beginning and 84.0 MB in the end (delta: 6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 734]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:31:22,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:31:22,898 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:31:22,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:31:22,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:31:22,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:31:22,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:31:22,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:31:22,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:31:22,978 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:31:22,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:31:22,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:31:22,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:31:22,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:31:22,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:31:22,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:31:22,993 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:31:22,994 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:31:22,996 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:31:23,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:31:23,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:31:23,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:31:23,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:31:23,012 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:31:23,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:31:23,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:31:23,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:31:23,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:31:23,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:31:23,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:31:23,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:31:23,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:31:23,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:31:23,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:31:23,031 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:31:23,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:31:23,032 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:31:23,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:31:23,033 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:31:23,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:31:23,035 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:31:23,036 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:31:23,082 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:31:23,082 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:31:23,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:31:23,084 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:31:23,084 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:31:23,084 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:31:23,085 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:31:23,085 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:31:23,085 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:31:23,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:31:23,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:31:23,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:31:23,088 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:31:23,088 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:31:23,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:31:23,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:31:23,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:31:23,089 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:31:23,089 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:31:23,090 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:31:23,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:31:23,090 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:31:23,090 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:31:23,090 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:31:23,091 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:31:23,091 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:31:23,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:31:23,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:31:23,092 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:31:23,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:31:23,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:31:23,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:31:23,093 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:31:23,093 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:31:23,093 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:31:23,094 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:31:23,094 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_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 241cbbc1863278905c5862751ae4b8363464962676a0cc42dc0ceaf22f2782d4 [2021-11-03 05:31:23,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:31:23,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:31:23,508 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:31:23,509 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:31:23,510 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:31:23,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-03 05:31:23,581 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data/13f2f0986/d8a71ae3b54842049d727c3fa1204526/FLAG63193f56c [2021-11-03 05:31:24,302 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:31:24,308 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i [2021-11-03 05:31:24,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data/13f2f0986/d8a71ae3b54842049d727c3fa1204526/FLAG63193f56c [2021-11-03 05:31:24,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/data/13f2f0986/d8a71ae3b54842049d727c3fa1204526 [2021-11-03 05:31:24,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:31:24,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:31:24,502 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:24,502 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:31:24,506 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:31:24,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:24" (1/1) ... [2021-11-03 05:31:24,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@309348e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:24, skipping insertion in model container [2021-11-03 05:31:24,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:31:24" (1/1) ... [2021-11-03 05:31:24,517 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:31:24,604 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:31:25,144 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_fea36c60-88b3-4c80-b9ac-432444a927bc/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-03 05:31:25,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:25,500 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:31:25,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:31:25,546 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_fea36c60-88b3-4c80-b9ac-432444a927bc/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-03 05:31:25,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:25,783 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:31:25,808 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_fea36c60-88b3-4c80-b9ac-432444a927bc/sv-benchmarks/c/uthash-2.0.2/uthash_SAX_test10-3.i[33022,33035] [2021-11-03 05:31:25,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:31:25,970 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:31:25,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25 WrapperNode [2021-11-03 05:31:25,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:31:25,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:31:25,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:31:25,972 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:31:25,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,073 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:31:26,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:31:26,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:31:26,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:31:26,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,214 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,215 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:31:26,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:31:26,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:31:26,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:31:26,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (1/1) ... [2021-11-03 05:31:26,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:31:26,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:31:26,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:31:26,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:31:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:31:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:31:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:31:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:31:26,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:31:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-03 05:31:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:31:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:31:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:31:26,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:31:26,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:31:26,501 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:31:36,888 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:31:36,889 INFO L299 CfgBuilder]: Removed 224 assume(true) statements. [2021-11-03 05:31:36,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:31:36 BoogieIcfgContainer [2021-11-03 05:31:36,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:31:36,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:31:36,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:31:36,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:31:36,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:31:24" (1/3) ... [2021-11-03 05:31:36,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7183beee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:31:36, skipping insertion in model container [2021-11-03 05:31:36,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:31:25" (2/3) ... [2021-11-03 05:31:36,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7183beee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:31:36, skipping insertion in model container [2021-11-03 05:31:36,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:31:36" (3/3) ... [2021-11-03 05:31:36,904 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_SAX_test10-3.i [2021-11-03 05:31:36,909 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:31:36,909 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1208 error locations. [2021-11-03 05:31:36,954 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:31:36,960 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 05:31:36,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1208 error locations. [2021-11-03 05:31:37,010 INFO L276 IsEmpty]: Start isEmpty. Operand has 2500 states, 1291 states have (on average 2.2130131680867544) internal successors, (2857), 2499 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:31:37,016 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:37,016 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:31:37,017 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:31:37,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:37,023 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-03 05:31:37,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:37,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398933314] [2021-11-03 05:31:37,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:37,036 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:37,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:37,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:37,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:31:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:37,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:31:37,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:37,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:31:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:37,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:37,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:37,506 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:37,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398933314] [2021-11-03 05:31:37,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398933314] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:37,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:37,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:31:37,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888333036] [2021-11-03 05:31:37,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:31:37,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:37,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:31:37,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:31:37,542 INFO L87 Difference]: Start difference. First operand has 2500 states, 1291 states have (on average 2.2130131680867544) internal successors, (2857), 2499 states have internal predecessors, (2857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:42,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:42,772 INFO L93 Difference]: Finished difference Result 3353 states and 3561 transitions. [2021-11-03 05:31:42,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:31:42,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 05:31:42,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:42,808 INFO L225 Difference]: With dead ends: 3353 [2021-11-03 05:31:42,809 INFO L226 Difference]: Without dead ends: 3351 [2021-11-03 05:31:42,810 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:31:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3351 states. [2021-11-03 05:31:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3351 to 2648. [2021-11-03 05:31:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 1463 states have (on average 2.0485304169514698) internal successors, (2997), 2647 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 2997 transitions. [2021-11-03 05:31:42,937 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 2997 transitions. Word has length 3 [2021-11-03 05:31:42,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:42,937 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 2997 transitions. [2021-11-03 05:31:42,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:42,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 2997 transitions. [2021-11-03 05:31:42,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-03 05:31:42,939 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:42,939 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-03 05:31:42,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:43,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:43,154 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:31:43,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:43,162 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-03 05:31:43,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:43,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [11330901] [2021-11-03 05:31:43,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:43,166 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:43,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:43,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:31:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:43,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:31:43,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:43,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:31:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:43,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:43,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:43,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [11330901] [2021-11-03 05:31:43,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [11330901] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:43,493 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:43,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:31:43,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561261109] [2021-11-03 05:31:43,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:31:43,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:43,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:31:43,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:43,496 INFO L87 Difference]: Start difference. First operand 2648 states and 2997 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:31:56,560 INFO L93 Difference]: Finished difference Result 4194 states and 4674 transitions. [2021-11-03 05:31:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:31:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-03 05:31:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:31:56,583 INFO L225 Difference]: With dead ends: 4194 [2021-11-03 05:31:56,584 INFO L226 Difference]: Without dead ends: 4194 [2021-11-03 05:31:56,584 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:31:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-11-03 05:31:56,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 2812. [2021-11-03 05:31:56,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2812 states, 1639 states have (on average 2.0372178157413057) internal successors, (3339), 2811 states have internal predecessors, (3339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:56,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 3339 transitions. [2021-11-03 05:31:56,660 INFO L78 Accepts]: Start accepts. Automaton has 2812 states and 3339 transitions. Word has length 3 [2021-11-03 05:31:56,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:31:56,660 INFO L470 AbstractCegarLoop]: Abstraction has 2812 states and 3339 transitions. [2021-11-03 05:31:56,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:31:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2812 states and 3339 transitions. [2021-11-03 05:31:56,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:31:56,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:31:56,661 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:31:56,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:31:56,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:31:56,873 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:31:56,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:31:56,873 INFO L85 PathProgramCache]: Analyzing trace with hash 62249618, now seen corresponding path program 1 times [2021-11-03 05:31:56,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:31:56,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [788204140] [2021-11-03 05:31:56,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:31:56,875 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:31:56,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:31:56,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:31:56,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:31:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:31:57,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:31:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:31:57,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:31:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:57,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:31:57,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:31:57,176 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:31:57,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [788204140] [2021-11-03 05:31:57,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [788204140] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:31:57,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:31:57,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:31:57,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352321453] [2021-11-03 05:31:57,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:31:57,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:31:57,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:31:57,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:31:57,179 INFO L87 Difference]: Start difference. First operand 2812 states and 3339 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:01,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:01,052 INFO L93 Difference]: Finished difference Result 3618 states and 4157 transitions. [2021-11-03 05:32:01,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:32:01,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 05:32:01,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:01,091 INFO L225 Difference]: With dead ends: 3618 [2021-11-03 05:32:01,091 INFO L226 Difference]: Without dead ends: 3618 [2021-11-03 05:32:01,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:32:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3618 states. [2021-11-03 05:32:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3618 to 2721. [2021-11-03 05:32:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2721 states, 1639 states have (on average 1.9609517998779744) internal successors, (3214), 2720 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2721 states to 2721 states and 3214 transitions. [2021-11-03 05:32:01,164 INFO L78 Accepts]: Start accepts. Automaton has 2721 states and 3214 transitions. Word has length 8 [2021-11-03 05:32:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:01,164 INFO L470 AbstractCegarLoop]: Abstraction has 2721 states and 3214 transitions. [2021-11-03 05:32:01,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2721 states and 3214 transitions. [2021-11-03 05:32:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-03 05:32:01,165 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:01,166 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:01,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:01,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:01,381 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:01,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:01,382 INFO L85 PathProgramCache]: Analyzing trace with hash 62249619, now seen corresponding path program 1 times [2021-11-03 05:32:01,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:01,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315640340] [2021-11-03 05:32:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:01,383 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:01,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:01,384 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:01,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:32:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:01,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:32:01,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:01,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:32:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:01,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:01,733 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:01,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315640340] [2021-11-03 05:32:01,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315640340] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:01,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:01,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:32:01,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989983870] [2021-11-03 05:32:01,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:01,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:01,735 INFO L87 Difference]: Start difference. First operand 2721 states and 3214 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:11,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:11,829 INFO L93 Difference]: Finished difference Result 3747 states and 4188 transitions. [2021-11-03 05:32:11,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:11,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-03 05:32:11,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:11,843 INFO L225 Difference]: With dead ends: 3747 [2021-11-03 05:32:11,843 INFO L226 Difference]: Without dead ends: 3747 [2021-11-03 05:32:11,844 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3747 states. [2021-11-03 05:32:11,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3747 to 2713. [2021-11-03 05:32:11,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 1641 states have (on average 1.9463741620962827) internal successors, (3194), 2712 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:11,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 3194 transitions. [2021-11-03 05:32:11,903 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 3194 transitions. Word has length 8 [2021-11-03 05:32:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:11,904 INFO L470 AbstractCegarLoop]: Abstraction has 2713 states and 3194 transitions. [2021-11-03 05:32:11,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 3194 transitions. [2021-11-03 05:32:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:32:11,905 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:11,905 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:11,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:12,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:12,117 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr658REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 175289392, now seen corresponding path program 1 times [2021-11-03 05:32:12,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:12,118 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [106563416] [2021-11-03 05:32:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:12,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:12,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:12,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:12,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:32:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:12,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:32:12,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:12,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:12,376 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:12,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [106563416] [2021-11-03 05:32:12,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [106563416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:12,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:12,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:32:12,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667037709] [2021-11-03 05:32:12,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:12,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:12,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:12,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:12,379 INFO L87 Difference]: Start difference. First operand 2713 states and 3194 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:12,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:12,422 INFO L93 Difference]: Finished difference Result 2671 states and 3151 transitions. [2021-11-03 05:32:12,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:32:12,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-03 05:32:12,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:12,437 INFO L225 Difference]: With dead ends: 2671 [2021-11-03 05:32:12,437 INFO L226 Difference]: Without dead ends: 2671 [2021-11-03 05:32:12,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2671 states. [2021-11-03 05:32:12,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2671 to 2671. [2021-11-03 05:32:12,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2671 states, 1623 states have (on average 1.9414664202094887) internal successors, (3151), 2670 states have internal predecessors, (3151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2671 states to 2671 states and 3151 transitions. [2021-11-03 05:32:12,514 INFO L78 Accepts]: Start accepts. Automaton has 2671 states and 3151 transitions. Word has length 11 [2021-11-03 05:32:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:12,515 INFO L470 AbstractCegarLoop]: Abstraction has 2671 states and 3151 transitions. [2021-11-03 05:32:12,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2671 states and 3151 transitions. [2021-11-03 05:32:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:32:12,516 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:12,517 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:12,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:12,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:12,729 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr682REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:12,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:12,730 INFO L85 PathProgramCache]: Analyzing trace with hash 949435626, now seen corresponding path program 1 times [2021-11-03 05:32:12,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:12,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [136494431] [2021-11-03 05:32:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:12,731 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:12,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:12,732 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:12,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:32:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:12,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:32:12,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:12,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:13,009 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:13,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [136494431] [2021-11-03 05:32:13,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [136494431] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:13,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:13,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:32:13,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711318244] [2021-11-03 05:32:13,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:32:13,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:13,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:32:13,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:32:13,011 INFO L87 Difference]: Start difference. First operand 2671 states and 3151 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:13,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:13,126 INFO L93 Difference]: Finished difference Result 2650 states and 3123 transitions. [2021-11-03 05:32:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:13,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-03 05:32:13,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:13,139 INFO L225 Difference]: With dead ends: 2650 [2021-11-03 05:32:13,139 INFO L226 Difference]: Without dead ends: 2650 [2021-11-03 05:32:13,140 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:32:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-11-03 05:32:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2649. [2021-11-03 05:32:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 1615 states have (on average 1.9331269349845202) internal successors, (3122), 2648 states have internal predecessors, (3122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:13,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 3122 transitions. [2021-11-03 05:32:13,191 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 3122 transitions. Word has length 13 [2021-11-03 05:32:13,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:13,192 INFO L470 AbstractCegarLoop]: Abstraction has 2649 states and 3122 transitions. [2021-11-03 05:32:13,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:13,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 3122 transitions. [2021-11-03 05:32:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:32:13,193 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:13,193 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:13,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:13,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:13,407 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr334REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash 270217471, now seen corresponding path program 1 times [2021-11-03 05:32:13,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:13,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30494036] [2021-11-03 05:32:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:13,408 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:13,409 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:13,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:32:13,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:13,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:32:13,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:13,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:13,710 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:13,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30494036] [2021-11-03 05:32:13,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30494036] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:13,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:13,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:32:13,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033433948] [2021-11-03 05:32:13,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:13,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:13,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:13,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:13,713 INFO L87 Difference]: Start difference. First operand 2649 states and 3122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:13,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:13,774 INFO L93 Difference]: Finished difference Result 4337 states and 4926 transitions. [2021-11-03 05:32:13,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:32:13,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 05:32:13,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:13,796 INFO L225 Difference]: With dead ends: 4337 [2021-11-03 05:32:13,796 INFO L226 Difference]: Without dead ends: 4337 [2021-11-03 05:32:13,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:13,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4337 states. [2021-11-03 05:32:13,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4337 to 2571. [2021-11-03 05:32:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 1561 states have (on average 1.9173606662395901) internal successors, (2993), 2570 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 2993 transitions. [2021-11-03 05:32:13,876 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 2993 transitions. Word has length 20 [2021-11-03 05:32:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:13,876 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 2993 transitions. [2021-11-03 05:32:13,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 2993 transitions. [2021-11-03 05:32:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-03 05:32:13,877 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:13,877 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:13,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:14,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:14,099 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:14,099 INFO L85 PathProgramCache]: Analyzing trace with hash -673839521, now seen corresponding path program 1 times [2021-11-03 05:32:14,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:14,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [818572302] [2021-11-03 05:32:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:14,100 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:14,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:14,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:32:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:32:14,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:14,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:14,429 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:14,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [818572302] [2021-11-03 05:32:14,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [818572302] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:14,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:14,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:32:14,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237076671] [2021-11-03 05:32:14,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:14,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:14,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:14,434 INFO L87 Difference]: Start difference. First operand 2571 states and 2993 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:14,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:14,501 INFO L93 Difference]: Finished difference Result 4260 states and 4849 transitions. [2021-11-03 05:32:14,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:32:14,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-03 05:32:14,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:14,517 INFO L225 Difference]: With dead ends: 4260 [2021-11-03 05:32:14,517 INFO L226 Difference]: Without dead ends: 4260 [2021-11-03 05:32:14,517 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:14,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2021-11-03 05:32:14,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 2529. [2021-11-03 05:32:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2529 states, 1543 states have (on average 1.911860012961763) internal successors, (2950), 2528 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 2950 transitions. [2021-11-03 05:32:14,573 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 2950 transitions. Word has length 20 [2021-11-03 05:32:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:14,573 INFO L470 AbstractCegarLoop]: Abstraction has 2529 states and 2950 transitions. [2021-11-03 05:32:14,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 2950 transitions. [2021-11-03 05:32:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 05:32:14,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:14,575 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] [2021-11-03 05:32:14,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:14,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:14,787 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr358REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1980977049, now seen corresponding path program 1 times [2021-11-03 05:32:14,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:14,787 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156418514] [2021-11-03 05:32:14,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:14,788 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:14,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:14,788 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:14,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:32:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:15,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:32:15,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:15,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:15,126 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:15,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156418514] [2021-11-03 05:32:15,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156418514] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:15,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:15,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:32:15,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788179102] [2021-11-03 05:32:15,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:32:15,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:32:15,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:32:15,127 INFO L87 Difference]: Start difference. First operand 2529 states and 2950 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:15,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:15,270 INFO L93 Difference]: Finished difference Result 4218 states and 4756 transitions. [2021-11-03 05:32:15,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:15,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 05:32:15,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:15,297 INFO L225 Difference]: With dead ends: 4218 [2021-11-03 05:32:15,297 INFO L226 Difference]: Without dead ends: 4218 [2021-11-03 05:32:15,298 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:32:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2021-11-03 05:32:15,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 2491. [2021-11-03 05:32:15,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1519 states have (on average 1.8847926267281105) internal successors, (2863), 2490 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 2863 transitions. [2021-11-03 05:32:15,392 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 2863 transitions. Word has length 22 [2021-11-03 05:32:15,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:15,392 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 2863 transitions. [2021-11-03 05:32:15,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:15,392 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 2863 transitions. [2021-11-03 05:32:15,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-03 05:32:15,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:15,393 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] [2021-11-03 05:32:15,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:15,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:15,605 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:15,606 INFO L85 PathProgramCache]: Analyzing trace with hash 980278297, now seen corresponding path program 1 times [2021-11-03 05:32:15,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:15,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2121927981] [2021-11-03 05:32:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:15,606 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:15,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:15,607 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:15,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:32:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:15,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:32:15,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:15,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:15,964 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:15,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2121927981] [2021-11-03 05:32:15,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2121927981] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:15,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:15,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:32:15,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119114909] [2021-11-03 05:32:15,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:32:15,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:15,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:32:15,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:32:15,966 INFO L87 Difference]: Start difference. First operand 2491 states and 2863 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:16,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:16,089 INFO L93 Difference]: Finished difference Result 4179 states and 4705 transitions. [2021-11-03 05:32:16,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:16,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-03 05:32:16,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:16,099 INFO L225 Difference]: With dead ends: 4179 [2021-11-03 05:32:16,099 INFO L226 Difference]: Without dead ends: 4179 [2021-11-03 05:32:16,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:32:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4179 states. [2021-11-03 05:32:16,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4179 to 2469. [2021-11-03 05:32:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2469 states, 1511 states have (on average 1.8755790866975512) internal successors, (2834), 2468 states have internal predecessors, (2834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2469 states to 2469 states and 2834 transitions. [2021-11-03 05:32:16,149 INFO L78 Accepts]: Start accepts. Automaton has 2469 states and 2834 transitions. Word has length 22 [2021-11-03 05:32:16,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:16,150 INFO L470 AbstractCegarLoop]: Abstraction has 2469 states and 2834 transitions. [2021-11-03 05:32:16,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:16,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2469 states and 2834 transitions. [2021-11-03 05:32:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:32:16,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:16,152 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:16,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:16,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:16,363 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr696REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:16,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:16,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283832, now seen corresponding path program 1 times [2021-11-03 05:32:16,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:16,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410759551] [2021-11-03 05:32:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:16,365 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:16,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:16,366 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:16,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:32:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:16,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:32:16,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:16,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:32:16,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:16,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:16,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:16,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:16,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410759551] [2021-11-03 05:32:16,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410759551] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:16,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:16,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:32:16,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521628508] [2021-11-03 05:32:16,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:16,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:16,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:16,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:16,905 INFO L87 Difference]: Start difference. First operand 2469 states and 2834 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:21,152 INFO L93 Difference]: Finished difference Result 3093 states and 3377 transitions. [2021-11-03 05:32:21,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:32:21,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 05:32:21,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:21,159 INFO L225 Difference]: With dead ends: 3093 [2021-11-03 05:32:21,159 INFO L226 Difference]: Without dead ends: 3093 [2021-11-03 05:32:21,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:32:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3093 states. [2021-11-03 05:32:21,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3093 to 2465. [2021-11-03 05:32:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2465 states, 1511 states have (on average 1.8729318332230311) internal successors, (2830), 2464 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:21,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2465 states to 2465 states and 2830 transitions. [2021-11-03 05:32:21,199 INFO L78 Accepts]: Start accepts. Automaton has 2465 states and 2830 transitions. Word has length 27 [2021-11-03 05:32:21,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:21,200 INFO L470 AbstractCegarLoop]: Abstraction has 2465 states and 2830 transitions. [2021-11-03 05:32:21,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2465 states and 2830 transitions. [2021-11-03 05:32:21,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:32:21,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:21,201 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:21,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-03 05:32:21,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:21,413 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr697REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:21,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1893283833, now seen corresponding path program 1 times [2021-11-03 05:32:21,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:21,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [151413175] [2021-11-03 05:32:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:21,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:21,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:21,415 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:21,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:32:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:21,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:32:21,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:21,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:32:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:22,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:22,465 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:22,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [151413175] [2021-11-03 05:32:22,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [151413175] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:22,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:22,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:32:22,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355623234] [2021-11-03 05:32:22,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:32:22,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:32:22,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:32:22,468 INFO L87 Difference]: Start difference. First operand 2465 states and 2830 transitions. Second operand has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:35,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:35,387 INFO L93 Difference]: Finished difference Result 3708 states and 4079 transitions. [2021-11-03 05:32:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:32:35,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 05:32:35,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:35,395 INFO L225 Difference]: With dead ends: 3708 [2021-11-03 05:32:35,396 INFO L226 Difference]: Without dead ends: 3708 [2021-11-03 05:32:35,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:32:35,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3708 states. [2021-11-03 05:32:35,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3708 to 2498. [2021-11-03 05:32:35,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 1545 states have (on average 1.855663430420712) internal successors, (2867), 2497 states have internal predecessors, (2867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 2867 transitions. [2021-11-03 05:32:35,455 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 2867 transitions. Word has length 27 [2021-11-03 05:32:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:35,455 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 2867 transitions. [2021-11-03 05:32:35,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.6) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 2867 transitions. [2021-11-03 05:32:35,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:32:35,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:35,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:35,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:35,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:35,672 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr372REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:35,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:35,673 INFO L85 PathProgramCache]: Analyzing trace with hash 187122631, now seen corresponding path program 1 times [2021-11-03 05:32:35,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:35,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2057747559] [2021-11-03 05:32:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:35,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:35,675 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:35,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:32:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:35,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:32:35,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:36,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:32:36,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:36,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:36,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:36,263 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:36,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2057747559] [2021-11-03 05:32:36,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2057747559] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:36,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:36,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:32:36,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774549937] [2021-11-03 05:32:36,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:32:36,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:32:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:32:36,265 INFO L87 Difference]: Start difference. First operand 2498 states and 2867 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:43,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:32:43,018 INFO L93 Difference]: Finished difference Result 5277 states and 5889 transitions. [2021-11-03 05:32:43,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:32:43,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:32:43,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:32:43,028 INFO L225 Difference]: With dead ends: 5277 [2021-11-03 05:32:43,028 INFO L226 Difference]: Without dead ends: 5277 [2021-11-03 05:32:43,029 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:32:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2021-11-03 05:32:43,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 2495. [2021-11-03 05:32:43,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1545 states have (on average 1.8485436893203884) internal successors, (2856), 2494 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2856 transitions. [2021-11-03 05:32:43,093 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2856 transitions. Word has length 36 [2021-11-03 05:32:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:32:43,093 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 2856 transitions. [2021-11-03 05:32:43,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:32:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2856 transitions. [2021-11-03 05:32:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:32:43,095 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:32:43,095 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:32:43,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-03 05:32:43,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:32:43,307 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr373REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:32:43,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:32:43,308 INFO L85 PathProgramCache]: Analyzing trace with hash 187122632, now seen corresponding path program 1 times [2021-11-03 05:32:43,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:32:43,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1898032664] [2021-11-03 05:32:43,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:32:43,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:32:43,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:32:43,310 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:32:43,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:32:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:32:43,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:32:43,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:32:43,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:32:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:43,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:32:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:32:44,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:32:44,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1898032664] [2021-11-03 05:32:44,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1898032664] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:32:44,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:32:44,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:32:44,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831749315] [2021-11-03 05:32:44,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:32:44,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:32:44,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:32:44,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:32:44,424 INFO L87 Difference]: Start difference. First operand 2495 states and 2856 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:05,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:05,676 INFO L93 Difference]: Finished difference Result 5397 states and 5957 transitions. [2021-11-03 05:33:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:33:05,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:33:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:05,700 INFO L225 Difference]: With dead ends: 5397 [2021-11-03 05:33:05,700 INFO L226 Difference]: Without dead ends: 5397 [2021-11-03 05:33:05,701 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:33:05,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-11-03 05:33:05,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 2495. [2021-11-03 05:33:05,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2495 states, 1545 states have (on average 1.8459546925566344) internal successors, (2852), 2494 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:05,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2495 states to 2495 states and 2852 transitions. [2021-11-03 05:33:05,742 INFO L78 Accepts]: Start accepts. Automaton has 2495 states and 2852 transitions. Word has length 36 [2021-11-03 05:33:05,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:05,743 INFO L470 AbstractCegarLoop]: Abstraction has 2495 states and 2852 transitions. [2021-11-03 05:33:05,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2495 states and 2852 transitions. [2021-11-03 05:33:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:33:05,744 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:05,744 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:05,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:05,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:05,957 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr54REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:05,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:05,958 INFO L85 PathProgramCache]: Analyzing trace with hash -773066201, now seen corresponding path program 1 times [2021-11-03 05:33:05,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:05,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661330579] [2021-11-03 05:33:05,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:05,959 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:05,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:05,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:05,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:33:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:06,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:33:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:06,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:33:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:06,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:06,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:06,597 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:06,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661330579] [2021-11-03 05:33:06,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [661330579] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:06,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:06,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:33:06,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279234199] [2021-11-03 05:33:06,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:33:06,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:06,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:33:06,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:33:06,599 INFO L87 Difference]: Start difference. First operand 2495 states and 2852 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:12,901 INFO L93 Difference]: Finished difference Result 4881 states and 5469 transitions. [2021-11-03 05:33:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:33:12,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:33:12,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:12,910 INFO L225 Difference]: With dead ends: 4881 [2021-11-03 05:33:12,910 INFO L226 Difference]: Without dead ends: 4881 [2021-11-03 05:33:12,913 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:33:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2021-11-03 05:33:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 2491. [2021-11-03 05:33:12,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 1545 states have (on average 1.8433656957928803) internal successors, (2848), 2490 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 2848 transitions. [2021-11-03 05:33:12,982 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 2848 transitions. Word has length 36 [2021-11-03 05:33:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:12,983 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 2848 transitions. [2021-11-03 05:33:12,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 2848 transitions. [2021-11-03 05:33:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:33:12,985 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:12,985 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:12,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:13,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:13,197 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr55REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:13,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:13,198 INFO L85 PathProgramCache]: Analyzing trace with hash -773066200, now seen corresponding path program 1 times [2021-11-03 05:33:13,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:13,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1614638241] [2021-11-03 05:33:13,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:13,199 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:13,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:13,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:13,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-03 05:33:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:13,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:33:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:13,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:33:13,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:13,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:14,293 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:14,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1614638241] [2021-11-03 05:33:14,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1614638241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:14,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:14,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:33:14,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651108243] [2021-11-03 05:33:14,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:33:14,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:14,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:33:14,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:33:14,295 INFO L87 Difference]: Start difference. First operand 2491 states and 2848 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:28,936 INFO L93 Difference]: Finished difference Result 4786 states and 5254 transitions. [2021-11-03 05:33:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:33:28,937 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:33:28,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:28,943 INFO L225 Difference]: With dead ends: 4786 [2021-11-03 05:33:28,943 INFO L226 Difference]: Without dead ends: 4786 [2021-11-03 05:33:28,943 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:33:28,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4786 states. [2021-11-03 05:33:28,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4786 to 2487. [2021-11-03 05:33:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 1545 states have (on average 1.840776699029126) internal successors, (2844), 2486 states have internal predecessors, (2844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 2844 transitions. [2021-11-03 05:33:28,981 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 2844 transitions. Word has length 36 [2021-11-03 05:33:28,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:28,981 INFO L470 AbstractCegarLoop]: Abstraction has 2487 states and 2844 transitions. [2021-11-03 05:33:28,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:28,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 2844 transitions. [2021-11-03 05:33:28,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-03 05:33:28,982 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:28,982 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:29,011 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:29,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:29,195 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash -480226171, now seen corresponding path program 1 times [2021-11-03 05:33:29,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:29,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177117933] [2021-11-03 05:33:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:29,196 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:29,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:29,197 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:29,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-03 05:33:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:33:29,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:29,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:29,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:29,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177117933] [2021-11-03 05:33:29,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177117933] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:29,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:29,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:33:29,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944688302] [2021-11-03 05:33:29,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:33:29,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:29,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:33:29,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:33:29,784 INFO L87 Difference]: Start difference. First operand 2487 states and 2844 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:29,839 INFO L93 Difference]: Finished difference Result 2481 states and 2830 transitions. [2021-11-03 05:33:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:33:29,840 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-03 05:33:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:29,842 INFO L225 Difference]: With dead ends: 2481 [2021-11-03 05:33:29,842 INFO L226 Difference]: Without dead ends: 2481 [2021-11-03 05:33:29,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:33:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2481 states. [2021-11-03 05:33:29,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2481 to 2481. [2021-11-03 05:33:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2481 states, 1539 states have (on average 1.838856400259909) internal successors, (2830), 2480 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2481 states to 2481 states and 2830 transitions. [2021-11-03 05:33:29,870 INFO L78 Accepts]: Start accepts. Automaton has 2481 states and 2830 transitions. Word has length 40 [2021-11-03 05:33:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:29,871 INFO L470 AbstractCegarLoop]: Abstraction has 2481 states and 2830 transitions. [2021-11-03 05:33:29,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2481 states and 2830 transitions. [2021-11-03 05:33:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-03 05:33:29,872 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:29,872 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:29,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:30,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:30,087 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr704REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:30,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:30,087 INFO L85 PathProgramCache]: Analyzing trace with hash -952585927, now seen corresponding path program 1 times [2021-11-03 05:33:30,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:30,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578781796] [2021-11-03 05:33:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:30,088 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:30,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:30,089 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:30,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:33:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:30,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:33:30,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:30,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:31,152 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:31,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578781796] [2021-11-03 05:33:31,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578781796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:31,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:31,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:33:31,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863716988] [2021-11-03 05:33:31,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:33:31,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:33:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:33:31,154 INFO L87 Difference]: Start difference. First operand 2481 states and 2830 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:31,470 INFO L93 Difference]: Finished difference Result 4076 states and 4571 transitions. [2021-11-03 05:33:31,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:33:31,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-03 05:33:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:31,475 INFO L225 Difference]: With dead ends: 4076 [2021-11-03 05:33:31,475 INFO L226 Difference]: Without dead ends: 4076 [2021-11-03 05:33:31,475 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:33:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-11-03 05:33:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3245. [2021-11-03 05:33:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 2303 states have (on average 1.8085106382978724) internal successors, (4165), 3244 states have internal predecessors, (4165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4165 transitions. [2021-11-03 05:33:31,518 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4165 transitions. Word has length 48 [2021-11-03 05:33:31,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:31,519 INFO L470 AbstractCegarLoop]: Abstraction has 3245 states and 4165 transitions. [2021-11-03 05:33:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:31,519 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4165 transitions. [2021-11-03 05:33:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-03 05:33:31,520 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:31,520 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:31,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:31,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:31,733 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1775606781, now seen corresponding path program 1 times [2021-11-03 05:33:31,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:31,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [280040326] [2021-11-03 05:33:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:31,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:31,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:31,734 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:31,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-03 05:33:32,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:32,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:33:32,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:32,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:32,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:32,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:32,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [280040326] [2021-11-03 05:33:32,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [280040326] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:32,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:32,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:33:32,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708894165] [2021-11-03 05:33:32,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:33:32,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:33:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:33:32,430 INFO L87 Difference]: Start difference. First operand 3245 states and 4165 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:32,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:32,489 INFO L93 Difference]: Finished difference Result 4650 states and 5656 transitions. [2021-11-03 05:33:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:33:32,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-03 05:33:32,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:32,494 INFO L225 Difference]: With dead ends: 4650 [2021-11-03 05:33:32,494 INFO L226 Difference]: Without dead ends: 4650 [2021-11-03 05:33:32,494 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:33:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4650 states. [2021-11-03 05:33:32,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4650 to 3221. [2021-11-03 05:33:32,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3221 states, 2279 states have (on average 1.8100043878894252) internal successors, (4125), 3220 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3221 states to 3221 states and 4125 transitions. [2021-11-03 05:33:32,538 INFO L78 Accepts]: Start accepts. Automaton has 3221 states and 4125 transitions. Word has length 51 [2021-11-03 05:33:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:32,538 INFO L470 AbstractCegarLoop]: Abstraction has 3221 states and 4125 transitions. [2021-11-03 05:33:32,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:32,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3221 states and 4125 transitions. [2021-11-03 05:33:32,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:33:32,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:32,540 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:32,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:32,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:32,753 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:32,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:32,754 INFO L85 PathProgramCache]: Analyzing trace with hash 732181606, now seen corresponding path program 1 times [2021-11-03 05:33:32,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:32,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501586677] [2021-11-03 05:33:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:32,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:32,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:32,756 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:32,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-03 05:33:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:33:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:33,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:33,584 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:33,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501586677] [2021-11-03 05:33:33,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501586677] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:33,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:33,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:33:33,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077994978] [2021-11-03 05:33:33,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:33:33,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:33:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:33:33,586 INFO L87 Difference]: Start difference. First operand 3221 states and 4125 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:33,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:33,681 INFO L93 Difference]: Finished difference Result 4386 states and 5145 transitions. [2021-11-03 05:33:33,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:33:33,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 05:33:33,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:33,687 INFO L225 Difference]: With dead ends: 4386 [2021-11-03 05:33:33,687 INFO L226 Difference]: Without dead ends: 4386 [2021-11-03 05:33:33,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:33:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-11-03 05:33:33,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3209. [2021-11-03 05:33:33,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3209 states, 2267 states have (on average 1.8107631230701366) internal successors, (4105), 3208 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3209 states to 3209 states and 4105 transitions. [2021-11-03 05:33:33,761 INFO L78 Accepts]: Start accepts. Automaton has 3209 states and 4105 transitions. Word has length 54 [2021-11-03 05:33:33,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:33,761 INFO L470 AbstractCegarLoop]: Abstraction has 3209 states and 4105 transitions. [2021-11-03 05:33:33,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:33,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3209 states and 4105 transitions. [2021-11-03 05:33:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:33:33,762 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:33,763 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:33,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:33,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:33,976 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr740ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:33,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:33,977 INFO L85 PathProgramCache]: Analyzing trace with hash -993308447, now seen corresponding path program 1 times [2021-11-03 05:33:33,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:33,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236568839] [2021-11-03 05:33:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:33,978 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:33,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:33,979 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:33,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:33:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:34,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:33:34,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:34,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:33:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:33:34,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:33:34,608 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:33:34,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 05:33:34,658 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-03 05:33:34,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 23 [2021-11-03 05:33:34,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:34,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:34,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:34,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:34,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236568839] [2021-11-03 05:33:34,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [236568839] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:34,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:34,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:33:34,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398024917] [2021-11-03 05:33:34,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:33:34,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:33:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:33:34,906 INFO L87 Difference]: Start difference. First operand 3209 states and 4105 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:38,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:38,135 INFO L93 Difference]: Finished difference Result 3437 states and 4344 transitions. [2021-11-03 05:33:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:33:38,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 05:33:38,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:38,138 INFO L225 Difference]: With dead ends: 3437 [2021-11-03 05:33:38,138 INFO L226 Difference]: Without dead ends: 3437 [2021-11-03 05:33:38,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:33:38,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3437 states. [2021-11-03 05:33:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3437 to 3175. [2021-11-03 05:33:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 2233 states have (on average 1.8226600985221675) internal successors, (4070), 3174 states have internal predecessors, (4070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 4070 transitions. [2021-11-03 05:33:38,163 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 4070 transitions. Word has length 54 [2021-11-03 05:33:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:38,163 INFO L470 AbstractCegarLoop]: Abstraction has 3175 states and 4070 transitions. [2021-11-03 05:33:38,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 4070 transitions. [2021-11-03 05:33:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:33:38,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:38,164 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:38,176 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-11-03 05:33:38,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:38,367 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr437REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:38,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:38,367 INFO L85 PathProgramCache]: Analyzing trace with hash -637866953, now seen corresponding path program 1 times [2021-11-03 05:33:38,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:38,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [709137416] [2021-11-03 05:33:38,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:38,368 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:38,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:38,368 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:38,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-03 05:33:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:38,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:33:38,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:39,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:39,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:39,762 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:39,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [709137416] [2021-11-03 05:33:39,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [709137416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:39,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:39,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:33:39,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173165463] [2021-11-03 05:33:39,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:33:39,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:39,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:33:39,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:33:39,764 INFO L87 Difference]: Start difference. First operand 3175 states and 4070 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:39,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:33:39,931 INFO L93 Difference]: Finished difference Result 4704 states and 5822 transitions. [2021-11-03 05:33:39,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:33:39,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 05:33:39,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:33:39,936 INFO L225 Difference]: With dead ends: 4704 [2021-11-03 05:33:39,936 INFO L226 Difference]: Without dead ends: 4704 [2021-11-03 05:33:39,936 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:33:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-11-03 05:33:39,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3943. [2021-11-03 05:33:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3001 states have (on average 1.7887370876374542) internal successors, (5368), 3942 states have internal predecessors, (5368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 5368 transitions. [2021-11-03 05:33:39,975 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 5368 transitions. Word has length 59 [2021-11-03 05:33:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:33:39,976 INFO L470 AbstractCegarLoop]: Abstraction has 3943 states and 5368 transitions. [2021-11-03 05:33:39,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:33:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 5368 transitions. [2021-11-03 05:33:39,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 05:33:39,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:33:39,977 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:33:39,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-03 05:33:40,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:33:40,191 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr391REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:33:40,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:33:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1882812110, now seen corresponding path program 1 times [2021-11-03 05:33:40,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:33:40,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [573104925] [2021-11-03 05:33:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:33:40,192 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:33:40,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:33:40,193 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:33:40,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-03 05:33:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:33:40,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-03 05:33:40,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:33:40,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:33:40,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:33:41,653 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:33:41,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-03 05:33:41,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:33:41,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-03 05:33:41,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:41,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:33:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:33:46,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:33:46,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [573104925] [2021-11-03 05:33:46,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [573104925] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:33:46,578 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:33:46,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:33:46,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418631728] [2021-11-03 05:33:46,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:33:46,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:33:46,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:33:46,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:33:46,580 INFO L87 Difference]: Start difference. First operand 3943 states and 5368 transitions. Second operand has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:18,631 INFO L93 Difference]: Finished difference Result 7168 states and 9781 transitions. [2021-11-03 05:34:18,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:34:18,633 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 05:34:18,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:18,642 INFO L225 Difference]: With dead ends: 7168 [2021-11-03 05:34:18,642 INFO L226 Difference]: Without dead ends: 7168 [2021-11-03 05:34:18,643 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=26, Invalid=28, Unknown=2, NotChecked=0, Total=56 [2021-11-03 05:34:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7168 states. [2021-11-03 05:34:18,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7168 to 3887. [2021-11-03 05:34:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3887 states, 3009 states have (on average 1.7374543037554004) internal successors, (5228), 3886 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:18,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3887 states to 3887 states and 5228 transitions. [2021-11-03 05:34:18,721 INFO L78 Accepts]: Start accepts. Automaton has 3887 states and 5228 transitions. Word has length 62 [2021-11-03 05:34:18,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:18,721 INFO L470 AbstractCegarLoop]: Abstraction has 3887 states and 5228 transitions. [2021-11-03 05:34:18,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 24.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:18,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3887 states and 5228 transitions. [2021-11-03 05:34:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 05:34:18,723 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:18,723 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:34:18,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:18,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:18,940 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr396ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:34:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:18,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1203198829, now seen corresponding path program 1 times [2021-11-03 05:34:18,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:18,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [577402347] [2021-11-03 05:34:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:18,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:18,945 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:18,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-03 05:34:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:19,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:34:19,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:19,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:19,860 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 [2021-11-03 05:34:19,909 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 [2021-11-03 05:34:19,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:19,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:20,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:20,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [577402347] [2021-11-03 05:34:20,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [577402347] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:20,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:20,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:34:20,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749445603] [2021-11-03 05:34:20,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:34:20,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:20,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:34:20,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:34:20,119 INFO L87 Difference]: Start difference. First operand 3887 states and 5228 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:31,927 INFO L93 Difference]: Finished difference Result 6424 states and 8590 transitions. [2021-11-03 05:34:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:34:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 05:34:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:31,934 INFO L225 Difference]: With dead ends: 6424 [2021-11-03 05:34:31,935 INFO L226 Difference]: Without dead ends: 6424 [2021-11-03 05:34:31,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:34:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6424 states. [2021-11-03 05:34:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6424 to 3886. [2021-11-03 05:34:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3886 states, 3009 states have (on average 1.7364572947823198) internal successors, (5225), 3885 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:31,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5225 transitions. [2021-11-03 05:34:31,993 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5225 transitions. Word has length 68 [2021-11-03 05:34:31,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:31,994 INFO L470 AbstractCegarLoop]: Abstraction has 3886 states and 5225 transitions. [2021-11-03 05:34:31,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:31,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5225 transitions. [2021-11-03 05:34:31,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-03 05:34:31,995 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:31,995 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:34:32,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:32,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:32,213 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:34:32,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:32,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1028979469, now seen corresponding path program 1 times [2021-11-03 05:34:32,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:32,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [589542847] [2021-11-03 05:34:32,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:32,214 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:32,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:32,215 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:32,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-03 05:34:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:32,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:34:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:33,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:33,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-03 05:34:33,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 05:34:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:33,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:33,347 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:33,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [589542847] [2021-11-03 05:34:33,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [589542847] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:33,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:33,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:34:33,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250437610] [2021-11-03 05:34:33,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:34:33,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:33,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:34:33,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:34:33,348 INFO L87 Difference]: Start difference. First operand 3886 states and 5225 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:34:45,241 INFO L93 Difference]: Finished difference Result 6416 states and 8576 transitions. [2021-11-03 05:34:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:34:45,241 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-03 05:34:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:34:45,249 INFO L225 Difference]: With dead ends: 6416 [2021-11-03 05:34:45,249 INFO L226 Difference]: Without dead ends: 6416 [2021-11-03 05:34:45,249 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:34:45,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2021-11-03 05:34:45,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 3885. [2021-11-03 05:34:45,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3009 states have (on average 1.7357926221335993) internal successors, (5223), 3884 states have internal predecessors, (5223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 5223 transitions. [2021-11-03 05:34:45,291 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 5223 transitions. Word has length 68 [2021-11-03 05:34:45,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:34:45,291 INFO L470 AbstractCegarLoop]: Abstraction has 3885 states and 5223 transitions. [2021-11-03 05:34:45,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 6 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:34:45,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 5223 transitions. [2021-11-03 05:34:45,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:34:45,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:34:45,292 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] [2021-11-03 05:34:45,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-03 05:34:45,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:34:45,507 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr397ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:34:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:34:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1355543210, now seen corresponding path program 1 times [2021-11-03 05:34:45,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:34:45,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1373582503] [2021-11-03 05:34:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:34:45,508 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:34:45,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:34:45,509 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:34:45,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-03 05:34:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:34:46,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:34:46,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:34:46,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:34:46,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 05:34:46,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:34:46,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 05:34:46,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 05:34:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:46,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:34:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:34:47,129 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:34:47,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1373582503] [2021-11-03 05:34:47,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1373582503] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:34:47,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:34:47,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:34:47,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692642331] [2021-11-03 05:34:47,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:34:47,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:34:47,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:34:47,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:34:47,131 INFO L87 Difference]: Start difference. First operand 3885 states and 5223 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:35:26,392 INFO L93 Difference]: Finished difference Result 5915 states and 7866 transitions. [2021-11-03 05:35:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:35:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 05:35:26,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:35:26,399 INFO L225 Difference]: With dead ends: 5915 [2021-11-03 05:35:26,399 INFO L226 Difference]: Without dead ends: 5915 [2021-11-03 05:35:26,399 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:35:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-11-03 05:35:26,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 3884. [2021-11-03 05:35:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3884 states, 3009 states have (on average 1.7347956131605184) internal successors, (5220), 3883 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:26,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3884 states to 3884 states and 5220 transitions. [2021-11-03 05:35:26,440 INFO L78 Accepts]: Start accepts. Automaton has 3884 states and 5220 transitions. Word has length 69 [2021-11-03 05:35:26,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:35:26,440 INFO L470 AbstractCegarLoop]: Abstraction has 3884 states and 5220 transitions. [2021-11-03 05:35:26,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:35:26,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3884 states and 5220 transitions. [2021-11-03 05:35:26,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-03 05:35:26,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:35:26,441 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] [2021-11-03 05:35:26,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-11-03 05:35:26,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:35:26,642 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:35:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:35:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1833592125, now seen corresponding path program 1 times [2021-11-03 05:35:26,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:35:26,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217985802] [2021-11-03 05:35:26,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:35:26,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:35:26,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:35:26,644 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:35:26,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-03 05:35:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:35:27,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:35:27,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:35:27,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:35:27,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-03 05:35:27,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-03 05:35:27,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-11-03 05:35:27,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-11-03 05:35:27,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:27,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:35:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:35:28,180 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:35:28,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217985802] [2021-11-03 05:35:28,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217985802] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:35:28,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:35:28,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:35:28,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914149386] [2021-11-03 05:35:28,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:35:28,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:35:28,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:35:28,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:35:28,182 INFO L87 Difference]: Start difference. First operand 3884 states and 5220 transitions. Second operand has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:36:09,674 INFO L93 Difference]: Finished difference Result 5910 states and 7857 transitions. [2021-11-03 05:36:09,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:36:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-03 05:36:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:36:09,680 INFO L225 Difference]: With dead ends: 5910 [2021-11-03 05:36:09,680 INFO L226 Difference]: Without dead ends: 5910 [2021-11-03 05:36:09,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:36:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5910 states. [2021-11-03 05:36:09,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5910 to 3883. [2021-11-03 05:36:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 3009 states have (on average 1.734130940511798) internal successors, (5218), 3882 states have internal predecessors, (5218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 5218 transitions. [2021-11-03 05:36:09,719 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 5218 transitions. Word has length 69 [2021-11-03 05:36:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:36:09,720 INFO L470 AbstractCegarLoop]: Abstraction has 3883 states and 5218 transitions. [2021-11-03 05:36:09,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:09,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 5218 transitions. [2021-11-03 05:36:09,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-03 05:36:09,720 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:36:09,721 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:36:09,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-03 05:36:09,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:36:09,921 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:36:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:36:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1361720913, now seen corresponding path program 1 times [2021-11-03 05:36:09,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:36:09,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418123250] [2021-11-03 05:36:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:36:09,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:36:09,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:36:09,924 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:36:09,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-11-03 05:36:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:36:10,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:36:10,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:36:10,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:10,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:36:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:11,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:36:11,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418123250] [2021-11-03 05:36:11,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418123250] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:36:11,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:36:11,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:36:11,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890851075] [2021-11-03 05:36:11,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:36:11,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:36:11,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:36:11,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:36:11,143 INFO L87 Difference]: Start difference. First operand 3883 states and 5218 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:36:11,435 INFO L93 Difference]: Finished difference Result 6438 states and 8589 transitions. [2021-11-03 05:36:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:36:11,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-11-03 05:36:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:36:11,442 INFO L225 Difference]: With dead ends: 6438 [2021-11-03 05:36:11,442 INFO L226 Difference]: Without dead ends: 6438 [2021-11-03 05:36:11,442 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-03 05:36:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6438 states. [2021-11-03 05:36:11,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6438 to 3898. [2021-11-03 05:36:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3898 states, 3024 states have (on average 1.730489417989418) internal successors, (5233), 3897 states have internal predecessors, (5233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:11,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3898 states to 3898 states and 5233 transitions. [2021-11-03 05:36:11,490 INFO L78 Accepts]: Start accepts. Automaton has 3898 states and 5233 transitions. Word has length 73 [2021-11-03 05:36:11,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:36:11,490 INFO L470 AbstractCegarLoop]: Abstraction has 3898 states and 5233 transitions. [2021-11-03 05:36:11,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 3898 states and 5233 transitions. [2021-11-03 05:36:11,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-03 05:36:11,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:36:11,492 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:36:11,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-11-03 05:36:11,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:36:11,707 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:36:11,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:36:11,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1412235279, now seen corresponding path program 1 times [2021-11-03 05:36:11,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:36:11,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1325816670] [2021-11-03 05:36:11,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:36:11,709 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:36:11,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:36:11,709 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:36:11,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-03 05:36:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:36:12,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:36:12,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:36:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:12,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:36:12,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:12,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:36:12,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1325816670] [2021-11-03 05:36:12,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1325816670] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:36:12,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1151576853] [2021-11-03 05:36:12,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:36:12,983 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:36:12,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:36:12,984 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:36:12,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-03 05:36:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:36:14,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:36:14,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:36:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:14,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:36:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:14,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1151576853] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:36:14,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5363178] [2021-11-03 05:36:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:36:14,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:36:14,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:36:14,531 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:36:14,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-03 05:36:15,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:36:15,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:36:15,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:36:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:15,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:36:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:36:15,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5363178] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:36:15,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:36:15,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:36:15,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588755123] [2021-11-03 05:36:15,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:36:15,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:36:15,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:36:15,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:36:15,829 INFO L87 Difference]: Start difference. First operand 3898 states and 5233 transitions. Second operand has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:16,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:36:16,604 INFO L93 Difference]: Finished difference Result 6468 states and 8619 transitions. [2021-11-03 05:36:16,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:36:16,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-03 05:36:16,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:36:16,610 INFO L225 Difference]: With dead ends: 6468 [2021-11-03 05:36:16,611 INFO L226 Difference]: Without dead ends: 6468 [2021-11-03 05:36:16,611 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:36:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6468 states. [2021-11-03 05:36:16,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6468 to 3928. [2021-11-03 05:36:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3054 states have (on average 1.7233136869679109) internal successors, (5263), 3927 states have internal predecessors, (5263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 5263 transitions. [2021-11-03 05:36:16,651 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 5263 transitions. Word has length 75 [2021-11-03 05:36:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:36:16,651 INFO L470 AbstractCegarLoop]: Abstraction has 3928 states and 5263 transitions. [2021-11-03 05:36:16,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:36:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 5263 transitions. [2021-11-03 05:36:16,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 05:36:16,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:36:16,652 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:36:16,660 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-03 05:36:16,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-03 05:36:17,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-03 05:36:17,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:36:17,253 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr400REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 1204 more)] === [2021-11-03 05:36:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:36:17,254 INFO L85 PathProgramCache]: Analyzing trace with hash -547693775, now seen corresponding path program 2 times [2021-11-03 05:36:17,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:36:17,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473210706] [2021-11-03 05:36:17,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:36:17,254 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:36:17,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:36:17,255 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:36:17,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fea36c60-88b3-4c80-b9ac-432444a927bc/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-03 05:36:18,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-03 05:36:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:36:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:36:18,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:36:18,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 05:36:18,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:36:18,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:36:18,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 05:36:18,485 INFO L354 Elim1Store]: treesize reduction 166, result has 13.5 percent of original size [2021-11-03 05:36:18,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-03 05:36:18,580 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 05:36:18,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-03 05:36:18,829 INFO L354 Elim1Store]: treesize reduction 229, result has 11.2 percent of original size [2021-11-03 05:36:18,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 66 treesize of output 86 [2021-11-03 05:36:24,428 INFO L354 Elim1Store]: treesize reduction 1963, result has 5.1 percent of original size [2021-11-03 05:36:24,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 39 case distinctions, treesize of input 118 treesize of output 150 [2021-11-03 05:36:34,215 INFO L354 Elim1Store]: treesize reduction 876, result has 0.1 percent of original size [2021-11-03 05:36:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 157 treesize of output 67 [2021-11-03 05:36:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-03 05:36:34,397 INFO L328 TraceCheckSpWp]: Computing backward predicates...