./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/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 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:17:57,687 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:17:57,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:17:57,719 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:17:57,720 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:17:57,722 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:17:57,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:17:57,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:17:57,728 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:17:57,729 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:17:57,730 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:17:57,731 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:17:57,732 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:17:57,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:17:57,735 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:17:57,736 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:17:57,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:17:57,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:17:57,740 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:17:57,742 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:17:57,744 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:17:57,745 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:17:57,747 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:17:57,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:17:57,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:17:57,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:17:57,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:17:57,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:17:57,761 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:17:57,762 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:17:57,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:17:57,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:17:57,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:17:57,767 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:17:57,769 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:17:57,770 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:17:57,772 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:17:57,772 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:17:57,772 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:17:57,773 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:17:57,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:17:57,775 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-03 05:17:57,827 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:17:57,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:17:57,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:17:57,835 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:17:57,836 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:17:57,836 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:17:57,836 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:17:57,836 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:17:57,837 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:17:57,837 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:17:57,838 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:17:57,839 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:17:57,839 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:17:57,839 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:17:57,839 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:17:57,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:17:57,840 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:17:57,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:17:57,841 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:17:57,841 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:17:57,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:17:57,842 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:17:57,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:17:57,842 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:17:57,842 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:17:57,843 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:17:57,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:17:57,845 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:17:57,845 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:17:57,845 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:17:57,845 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:17:57,846 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:17:57,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:17:57,846 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:17:57,847 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:17:57,847 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:17:57,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:17:57,847 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:17:57,848 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:17:57,848 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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c [2021-11-03 05:17:58,225 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:17:58,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:17:58,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:17:58,268 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:17:58,269 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:17:58,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2021-11-03 05:17:58,351 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data/1831e6cbe/6ff03bfbaf1a4330879c7964b3e97c28/FLAGd6ec8ef2c [2021-11-03 05:17:58,966 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:17:58,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2021-11-03 05:17:59,007 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data/1831e6cbe/6ff03bfbaf1a4330879c7964b3e97c28/FLAGd6ec8ef2c [2021-11-03 05:17:59,202 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data/1831e6cbe/6ff03bfbaf1a4330879c7964b3e97c28 [2021-11-03 05:17:59,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:17:59,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:17:59,209 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:59,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:17:59,213 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:17:59,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:59" (1/1) ... [2021-11-03 05:17:59,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@769caeb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:59, skipping insertion in model container [2021-11-03 05:17:59,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:17:59" (1/1) ... [2021-11-03 05:17:59,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:17:59,308 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:17:59,723 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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2021-11-03 05:17:59,854 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:17:59,867 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 05:17:59,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@46535e25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:17:59, skipping insertion in model container [2021-11-03 05:17:59,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:17:59,875 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-03 05:17:59,878 INFO L168 Benchmark]: Toolchain (without parser) took 670.57 ms. Allocated memory is still 127.9 MB. Free memory was 83.8 MB in the beginning and 88.9 MB in the end (delta: -5.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:59,879 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 127.9 MB. Free memory was 103.1 MB in the beginning and 103.1 MB in the end (delta: 66.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:17:59,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 666.58 ms. Allocated memory is still 127.9 MB. Free memory was 83.6 MB in the beginning and 88.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:17:59,883 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 127.9 MB. Free memory was 103.1 MB in the beginning and 103.1 MB in the end (delta: 66.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 666.58 ms. Allocated memory is still 127.9 MB. Free memory was 83.6 MB in the beginning and 88.9 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 752]: 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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/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 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:18:02,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:18:02,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:18:02,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:18:02,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:18:02,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:18:02,388 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:18:02,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:18:02,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:18:02,396 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:18:02,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:18:02,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:18:02,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:18:02,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:18:02,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:18:02,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:18:02,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:18:02,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:18:02,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:18:02,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:18:02,418 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:18:02,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:18:02,422 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:18:02,423 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:18:02,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:18:02,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:18:02,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:18:02,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:18:02,432 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:18:02,434 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:18:02,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:18:02,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:18:02,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:18:02,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:18:02,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:18:02,441 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:18:02,442 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:18:02,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:18:02,443 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:18:02,445 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:18:02,446 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:18:02,447 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-03 05:18:02,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:18:02,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:18:02,481 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:18:02,481 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:18:02,481 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:18:02,482 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:18:02,482 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:18:02,482 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:18:02,483 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:18:02,484 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-03 05:18:02,484 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-03 05:18:02,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:18:02,485 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:18:02,486 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-03 05:18:02,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:18:02,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:18:02,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:18:02,487 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-03 05:18:02,487 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-03 05:18:02,488 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-03 05:18:02,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:18:02,488 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:18:02,489 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 05:18:02,489 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 05:18:02,489 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:18:02,490 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:18:02,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:18:02,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 05:18:02,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:18:02,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:18:02,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:18:02,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:18:02,492 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 05:18:02,492 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 05:18:02,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:18:02,493 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:18:02,493 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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6d35be8b8e312d4eada0f7530ae9d43ecf1865be922a243e0781a735d175935c [2021-11-03 05:18:02,921 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:18:02,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:18:02,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:18:02,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:18:02,960 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:18:02,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2021-11-03 05:18:03,049 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data/65333dc49/369e7902d7714f45bd3295757ac9ed74/FLAG09a9d2060 [2021-11-03 05:18:03,949 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:18:03,949 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i [2021-11-03 05:18:03,969 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data/65333dc49/369e7902d7714f45bd3295757ac9ed74/FLAG09a9d2060 [2021-11-03 05:18:04,061 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/data/65333dc49/369e7902d7714f45bd3295757ac9ed74 [2021-11-03 05:18:04,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:18:04,068 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:18:04,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:18:04,072 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:18:04,077 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:18:04,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:18:04" (1/1) ... [2021-11-03 05:18:04,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bc4bc9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:04, skipping insertion in model container [2021-11-03 05:18:04,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:18:04" (1/1) ... [2021-11-03 05:18:04,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:18:04,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:18:04,829 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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2021-11-03 05:18:05,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:18:05,102 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-03 05:18:05,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:18:05,175 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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2021-11-03 05:18:05,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:18:05,375 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:18:05,450 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_02a2f659-5462-433e-abb0-6e3d1ae2ddab/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test4-2.i[33021,33034] [2021-11-03 05:18:05,515 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:18:05,568 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:18:05,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05 WrapperNode [2021-11-03 05:18:05,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:18:05,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:18:05,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:18:05,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:18:05,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:18:05,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:18:05,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:18:05,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:18:05,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:05,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:18:06,001 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:18:06,001 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:18:06,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:18:06,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (1/1) ... [2021-11-03 05:18:06,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:18:06,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:18:06,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:18:06,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:18:06,105 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-03 05:18:06,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 05:18:06,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 05:18:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 05:18:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:18:06,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 05:18:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 05:18:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 05:18:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 05:18:06,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:18:06,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:18:13,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:18:13,805 INFO L299 CfgBuilder]: Removed 107 assume(true) statements. [2021-11-03 05:18:13,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:18:13 BoogieIcfgContainer [2021-11-03 05:18:13,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:18:13,816 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:18:13,816 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:18:13,819 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:18:13,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:18:04" (1/3) ... [2021-11-03 05:18:13,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ca7b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:18:13, skipping insertion in model container [2021-11-03 05:18:13,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:18:05" (2/3) ... [2021-11-03 05:18:13,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42ca7b27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:18:13, skipping insertion in model container [2021-11-03 05:18:13,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:18:13" (3/3) ... [2021-11-03 05:18:13,828 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test4-2.i [2021-11-03 05:18:13,835 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:18:13,835 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 762 error locations. [2021-11-03 05:18:13,897 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:18:13,909 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 05:18:13,909 INFO L340 AbstractCegarLoop]: Starting to check reachability of 762 error locations. [2021-11-03 05:18:14,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 1500 states, 737 states have (on average 2.255088195386703) internal successors, (1662), 1499 states have internal predecessors, (1662), 0 states have call successors, (0), 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 05:18:14,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:18:14,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:14,012 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:18:14,013 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:14,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash 28698764, now seen corresponding path program 1 times [2021-11-03 05:18:14,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:14,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025877890] [2021-11-03 05:18:14,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:14,033 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:14,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:14,038 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:14,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 05:18:14,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:14,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 05:18:14,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:14,335 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 05:18:14,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:14,361 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 05:18:14,362 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:14,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025877890] [2021-11-03 05:18:14,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025877890] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:14,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:14,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:18:14,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392576487] [2021-11-03 05:18:14,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 05:18:14,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 05:18:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:18:14,390 INFO L87 Difference]: Start difference. First operand has 1500 states, 737 states have (on average 2.255088195386703) internal successors, (1662), 1499 states have internal predecessors, (1662), 0 states have call successors, (0), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 05:18:14,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:14,531 INFO L93 Difference]: Finished difference Result 1482 states and 1558 transitions. [2021-11-03 05:18:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 05:18:14,533 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 5 [2021-11-03 05:18:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:14,556 INFO L225 Difference]: With dead ends: 1482 [2021-11-03 05:18:14,556 INFO L226 Difference]: Without dead ends: 1480 [2021-11-03 05:18:14,557 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 05:18:14,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2021-11-03 05:18:14,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 1480. [2021-11-03 05:18:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 728 states have (on average 2.1373626373626373) internal successors, (1556), 1479 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1556 transitions. [2021-11-03 05:18:14,688 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1556 transitions. Word has length 5 [2021-11-03 05:18:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:14,689 INFO L470 AbstractCegarLoop]: Abstraction has 1480 states and 1556 transitions. [2021-11-03 05:18:14,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 05:18:14,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1556 transitions. [2021-11-03 05:18:14,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:18:14,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:14,691 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:18:14,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:14,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:14,904 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:14,907 INFO L85 PathProgramCache]: Analyzing trace with hash 28698826, now seen corresponding path program 1 times [2021-11-03 05:18:14,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:14,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1834419279] [2021-11-03 05:18:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:14,911 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:14,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:14,913 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:14,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 05:18:15,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:15,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:15,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:15,255 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 05:18:15,274 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 05:18:15,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:15,314 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 05:18:15,314 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:15,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1834419279] [2021-11-03 05:18:15,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1834419279] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:15,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:15,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 05:18:15,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426523828] [2021-11-03 05:18:15,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:18:15,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:15,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:18:15,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:18:15,319 INFO L87 Difference]: Start difference. First operand 1480 states and 1556 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 05:18:18,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:18,596 INFO L93 Difference]: Finished difference Result 1517 states and 1606 transitions. [2021-11-03 05:18:18,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:18:18,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 5 [2021-11-03 05:18:18,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:18,609 INFO L225 Difference]: With dead ends: 1517 [2021-11-03 05:18:18,609 INFO L226 Difference]: Without dead ends: 1517 [2021-11-03 05:18:18,610 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 05:18:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2021-11-03 05:18:18,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1463. [2021-11-03 05:18:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1463 states, 804 states have (on average 1.9875621890547264) internal successors, (1598), 1462 states have internal predecessors, (1598), 0 states have call successors, (0), 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 05:18:18,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1463 states to 1463 states and 1598 transitions. [2021-11-03 05:18:18,650 INFO L78 Accepts]: Start accepts. Automaton has 1463 states and 1598 transitions. Word has length 5 [2021-11-03 05:18:18,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:18,651 INFO L470 AbstractCegarLoop]: Abstraction has 1463 states and 1598 transitions. [2021-11-03 05:18:18,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 05:18:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1463 states and 1598 transitions. [2021-11-03 05:18:18,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:18:18,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:18,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:18:18,672 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 05:18:18,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:18,872 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:18,873 INFO L85 PathProgramCache]: Analyzing trace with hash 28698827, now seen corresponding path program 1 times [2021-11-03 05:18:18,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:18,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081573640] [2021-11-03 05:18:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:18,874 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:18,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:18,876 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:18,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 05:18:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:19,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:19,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:19,084 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 05:18:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:19,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:19,205 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:19,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081573640] [2021-11-03 05:18:19,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081573640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:19,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:19,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-03 05:18:19,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818600464] [2021-11-03 05:18:19,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:19,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:19,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:19,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:19,208 INFO L87 Difference]: Start difference. First operand 1463 states and 1598 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 05:18:27,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:27,661 INFO L93 Difference]: Finished difference Result 1820 states and 1976 transitions. [2021-11-03 05:18:27,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:27,662 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 5 [2021-11-03 05:18:27,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:27,674 INFO L225 Difference]: With dead ends: 1820 [2021-11-03 05:18:27,674 INFO L226 Difference]: Without dead ends: 1820 [2021-11-03 05:18:27,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 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 05:18:27,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2021-11-03 05:18:27,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 1619. [2021-11-03 05:18:27,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 970 states have (on average 1.9628865979381442) internal successors, (1904), 1618 states have internal predecessors, (1904), 0 states have call successors, (0), 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 05:18:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 1904 transitions. [2021-11-03 05:18:27,736 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 1904 transitions. Word has length 5 [2021-11-03 05:18:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:27,737 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 1904 transitions. [2021-11-03 05:18:27,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 05:18:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 1904 transitions. [2021-11-03 05:18:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 05:18:27,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:27,738 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 05:18:27,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:27,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:27,961 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr640REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:27,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:27,962 INFO L85 PathProgramCache]: Analyzing trace with hash 891404513, now seen corresponding path program 1 times [2021-11-03 05:18:27,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:27,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201776057] [2021-11-03 05:18:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:27,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:27,972 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:27,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 05:18:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:28,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:28,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:28,190 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 05:18:28,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:28,223 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 05:18:28,223 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:28,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201776057] [2021-11-03 05:18:28,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201776057] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:28,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:28,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:18:28,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507877314] [2021-11-03 05:18:28,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:28,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:28,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:28,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:28,229 INFO L87 Difference]: Start difference. First operand 1619 states and 1904 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 05:18:28,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:28,374 INFO L93 Difference]: Finished difference Result 2982 states and 3530 transitions. [2021-11-03 05:18:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:28,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 6 [2021-11-03 05:18:28,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:28,395 INFO L225 Difference]: With dead ends: 2982 [2021-11-03 05:18:28,396 INFO L226 Difference]: Without dead ends: 2982 [2021-11-03 05:18:28,396 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 05:18:28,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2982 states. [2021-11-03 05:18:28,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2982 to 2453. [2021-11-03 05:18:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 1804 states have (on average 1.9567627494456763) internal successors, (3530), 2452 states have internal predecessors, (3530), 0 states have call successors, (0), 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 05:18:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3530 transitions. [2021-11-03 05:18:28,482 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3530 transitions. Word has length 6 [2021-11-03 05:18:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:28,482 INFO L470 AbstractCegarLoop]: Abstraction has 2453 states and 3530 transitions. [2021-11-03 05:18:28,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 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 05:18:28,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3530 transitions. [2021-11-03 05:18:28,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 05:18:28,484 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:28,484 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:28,503 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:28,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:28,704 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:28,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:28,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2013913556, now seen corresponding path program 1 times [2021-11-03 05:18:28,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:28,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122676765] [2021-11-03 05:18:28,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:28,706 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:28,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:28,712 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:28,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-03 05:18:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:18:28,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:29,010 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 05:18:29,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:29,058 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 05:18:29,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:29,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122676765] [2021-11-03 05:18:29,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122676765] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:29,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:29,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:18:29,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564681881] [2021-11-03 05:18:29,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:29,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:29,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:29,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:29,071 INFO L87 Difference]: Start difference. First operand 2453 states and 3530 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 05:18:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:29,132 INFO L93 Difference]: Finished difference Result 2393 states and 3444 transitions. [2021-11-03 05:18:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:18:29,132 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 05:18:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:29,151 INFO L225 Difference]: With dead ends: 2393 [2021-11-03 05:18:29,151 INFO L226 Difference]: Without dead ends: 2393 [2021-11-03 05:18:29,152 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 05:18:29,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2393 states. [2021-11-03 05:18:29,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2393 to 2393. [2021-11-03 05:18:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 1768 states have (on average 1.9479638009049773) internal successors, (3444), 2392 states have internal predecessors, (3444), 0 states have call successors, (0), 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 05:18:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 3444 transitions. [2021-11-03 05:18:29,259 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 3444 transitions. Word has length 11 [2021-11-03 05:18:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:29,259 INFO L470 AbstractCegarLoop]: Abstraction has 2393 states and 3444 transitions. [2021-11-03 05:18:29,260 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 05:18:29,260 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 3444 transitions. [2021-11-03 05:18:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-03 05:18:29,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:29,261 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:18:29,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:29,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:29,461 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:29,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1659327634, now seen corresponding path program 1 times [2021-11-03 05:18:29,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:29,463 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [526691980] [2021-11-03 05:18:29,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:29,463 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:29,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:29,464 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:29,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-03 05:18:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:29,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:29,752 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 05:18:29,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:29,807 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:29,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [526691980] [2021-11-03 05:18:29,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [526691980] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:29,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:29,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-03 05:18:29,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583048858] [2021-11-03 05:18:29,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:18:29,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:29,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:18:29,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:18:29,811 INFO L87 Difference]: Start difference. First operand 2393 states and 3444 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 05:18:29,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:29,939 INFO L93 Difference]: Finished difference Result 2365 states and 3388 transitions. [2021-11-03 05:18:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:29,940 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 05:18:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:29,957 INFO L225 Difference]: With dead ends: 2365 [2021-11-03 05:18:29,958 INFO L226 Difference]: Without dead ends: 2365 [2021-11-03 05:18:29,958 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 05:18:29,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2365 states. [2021-11-03 05:18:30,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2365 to 2363. [2021-11-03 05:18:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 1752 states have (on average 1.932648401826484) internal successors, (3386), 2362 states have internal predecessors, (3386), 0 states have call successors, (0), 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 05:18:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 3386 transitions. [2021-11-03 05:18:30,048 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 3386 transitions. Word has length 13 [2021-11-03 05:18:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:30,049 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 3386 transitions. [2021-11-03 05:18:30,049 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 05:18:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 3386 transitions. [2021-11-03 05:18:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:18:30,051 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:30,052 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 05:18:30,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:30,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:30,266 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:30,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:30,266 INFO L85 PathProgramCache]: Analyzing trace with hash 913198236, now seen corresponding path program 1 times [2021-11-03 05:18:30,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:30,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1342836614] [2021-11-03 05:18:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:30,267 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:30,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:30,268 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:30,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-03 05:18:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:30,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:30,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:30,466 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 05:18:30,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:30,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:30,766 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 05:18:30,766 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:30,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1342836614] [2021-11-03 05:18:30,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1342836614] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:30,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:30,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:18:30,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089252063] [2021-11-03 05:18:30,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:30,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:30,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:30,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:30,770 INFO L87 Difference]: Start difference. First operand 2363 states and 3386 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 05:18:35,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:35,306 INFO L93 Difference]: Finished difference Result 3233 states and 4440 transitions. [2021-11-03 05:18:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:18:35,307 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 05:18:35,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:35,327 INFO L225 Difference]: With dead ends: 3233 [2021-11-03 05:18:35,327 INFO L226 Difference]: Without dead ends: 3233 [2021-11-03 05:18:35,328 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 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 05:18:35,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3233 states. [2021-11-03 05:18:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3233 to 2359. [2021-11-03 05:18:35,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2359 states, 1752 states have (on average 1.928082191780822) internal successors, (3378), 2358 states have internal predecessors, (3378), 0 states have call successors, (0), 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 05:18:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2359 states to 2359 states and 3378 transitions. [2021-11-03 05:18:35,398 INFO L78 Accepts]: Start accepts. Automaton has 2359 states and 3378 transitions. Word has length 27 [2021-11-03 05:18:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:35,399 INFO L470 AbstractCegarLoop]: Abstraction has 2359 states and 3378 transitions. [2021-11-03 05:18:35,399 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 05:18:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2359 states and 3378 transitions. [2021-11-03 05:18:35,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-03 05:18:35,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:35,400 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 05:18:35,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:35,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:35,619 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:35,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:35,620 INFO L85 PathProgramCache]: Analyzing trace with hash 913198237, now seen corresponding path program 1 times [2021-11-03 05:18:35,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:35,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1685047586] [2021-11-03 05:18:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:35,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:35,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:35,624 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:35,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-03 05:18:35,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:35,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:18:35,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:35,844 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 05:18:36,145 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 05:18:36,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:36,630 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 05:18:36,631 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:36,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1685047586] [2021-11-03 05:18:36,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1685047586] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:36,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:36,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:18:36,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9064374] [2021-11-03 05:18:36,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:36,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:36,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:18:36,634 INFO L87 Difference]: Start difference. First operand 2359 states and 3378 transitions. Second operand has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:47,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:47,588 INFO L93 Difference]: Finished difference Result 2858 states and 3793 transitions. [2021-11-03 05:18:47,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:18:47,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-03 05:18:47,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:47,605 INFO L225 Difference]: With dead ends: 2858 [2021-11-03 05:18:47,605 INFO L226 Difference]: Without dead ends: 2858 [2021-11-03 05:18:47,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:18:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2858 states. [2021-11-03 05:18:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2858 to 2355. [2021-11-03 05:18:47,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2355 states, 1752 states have (on average 1.92351598173516) internal successors, (3370), 2354 states have internal predecessors, (3370), 0 states have call successors, (0), 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 05:18:47,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2355 states to 2355 states and 3370 transitions. [2021-11-03 05:18:47,675 INFO L78 Accepts]: Start accepts. Automaton has 2355 states and 3370 transitions. Word has length 27 [2021-11-03 05:18:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:47,676 INFO L470 AbstractCegarLoop]: Abstraction has 2355 states and 3370 transitions. [2021-11-03 05:18:47,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 10.4) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:18:47,676 INFO L276 IsEmpty]: Start isEmpty. Operand 2355 states and 3370 transitions. [2021-11-03 05:18:47,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-03 05:18:47,678 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:47,678 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] [2021-11-03 05:18:47,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:47,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:47,894 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash 944973104, now seen corresponding path program 1 times [2021-11-03 05:18:47,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:47,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1102024777] [2021-11-03 05:18:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:47,895 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:47,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:47,896 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:47,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-03 05:18:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:48,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:48,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:48,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:48,525 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 05:18:48,525 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:48,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1102024777] [2021-11-03 05:18:48,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1102024777] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:48,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:48,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 05:18:48,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794934157] [2021-11-03 05:18:48,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:18:48,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:48,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:18:48,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:18:48,528 INFO L87 Difference]: Start difference. First operand 2355 states and 3370 transitions. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 05:18:48,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:48,607 INFO L93 Difference]: Finished difference Result 2343 states and 3350 transitions. [2021-11-03 05:18:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:18:48,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2021-11-03 05:18:48,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:48,623 INFO L225 Difference]: With dead ends: 2343 [2021-11-03 05:18:48,624 INFO L226 Difference]: Without dead ends: 2343 [2021-11-03 05:18:48,624 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 80 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 05:18:48,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-11-03 05:18:48,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 2343. [2021-11-03 05:18:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 1740 states have (on average 1.9252873563218391) internal successors, (3350), 2342 states have internal predecessors, (3350), 0 states have call successors, (0), 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 05:18:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 3350 transitions. [2021-11-03 05:18:48,688 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 3350 transitions. Word has length 42 [2021-11-03 05:18:48,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:48,688 INFO L470 AbstractCegarLoop]: Abstraction has 2343 states and 3350 transitions. [2021-11-03 05:18:48,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 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 05:18:48,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 3350 transitions. [2021-11-03 05:18:48,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-03 05:18:48,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:48,691 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] [2021-11-03 05:18:48,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:48,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:48,908 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr107REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:48,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:48,908 INFO L85 PathProgramCache]: Analyzing trace with hash 29098340, now seen corresponding path program 1 times [2021-11-03 05:18:48,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:48,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2093820464] [2021-11-03 05:18:48,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:48,909 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:48,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:48,911 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:48,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-03 05:18:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:49,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:18:49,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:49,778 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 05:18:49,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:50,251 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 05:18:50,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:50,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2093820464] [2021-11-03 05:18:50,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2093820464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:50,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:50,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-03 05:18:50,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435144601] [2021-11-03 05:18:50,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:18:50,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:50,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:18:50,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:18:50,254 INFO L87 Difference]: Start difference. First operand 2343 states and 3350 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 05:18:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:18:50,510 INFO L93 Difference]: Finished difference Result 2354 states and 3199 transitions. [2021-11-03 05:18:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:18:50,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-03 05:18:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:18:50,524 INFO L225 Difference]: With dead ends: 2354 [2021-11-03 05:18:50,525 INFO L226 Difference]: Without dead ends: 2354 [2021-11-03 05:18:50,525 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 97 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 05:18:50,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2354 states. [2021-11-03 05:18:50,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2354 to 2159. [2021-11-03 05:18:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 1556 states have (on average 1.9248071979434447) internal successors, (2995), 2158 states have internal predecessors, (2995), 0 states have call successors, (0), 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 05:18:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 2995 transitions. [2021-11-03 05:18:50,584 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 2995 transitions. Word has length 50 [2021-11-03 05:18:50,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:18:50,584 INFO L470 AbstractCegarLoop]: Abstraction has 2159 states and 2995 transitions. [2021-11-03 05:18:50,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 05:18:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 2995 transitions. [2021-11-03 05:18:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:18:50,587 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:18:50,587 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] [2021-11-03 05:18:50,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-03 05:18:50,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:18:50,804 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:18:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:18:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash -839399161, now seen corresponding path program 1 times [2021-11-03 05:18:50,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:18:50,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1350510985] [2021-11-03 05:18:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:18:50,806 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:18:50,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:18:50,807 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:18:50,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-03 05:18:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:18:51,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-03 05:18:51,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:18:51,426 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 05:18:51,435 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 05:18:52,336 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-03 05:18:52,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-03 05:18:52,345 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-03 05:18:52,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-03 05:18:52,383 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 05:18:52,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:18:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:18:57,857 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:18:57,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1350510985] [2021-11-03 05:18:57,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1350510985] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:18:57,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:18:57,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-03 05:18:57,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247457976] [2021-11-03 05:18:57,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:18:57,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:18:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:18:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=16, Unknown=1, NotChecked=0, Total=30 [2021-11-03 05:18:57,861 INFO L87 Difference]: Start difference. First operand 2159 states and 2995 transitions. Second operand has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 05:19:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:18,819 INFO L93 Difference]: Finished difference Result 2825 states and 3793 transitions. [2021-11-03 05:19:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:19:18,821 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 53 [2021-11-03 05:19:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:18,835 INFO L225 Difference]: With dead ends: 2825 [2021-11-03 05:19:18,836 INFO L226 Difference]: Without dead ends: 2825 [2021-11-03 05:19:18,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 100 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 05:19:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2825 states. [2021-11-03 05:19:18,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2825 to 2317. [2021-11-03 05:19:18,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 1752 states have (on average 1.8727168949771689) internal successors, (3281), 2316 states have internal predecessors, (3281), 0 states have call successors, (0), 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 05:19:18,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 3281 transitions. [2021-11-03 05:19:18,903 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 3281 transitions. Word has length 53 [2021-11-03 05:19:18,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:18,904 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 3281 transitions. [2021-11-03 05:19:18,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 20.8) internal successors, (104), 6 states have internal predecessors, (104), 0 states have call successors, (0), 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 05:19:18,905 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 3281 transitions. [2021-11-03 05:19:18,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:19:18,906 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:18,906 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 05:19:18,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:19,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:19,126 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:19:19,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:19,127 INFO L85 PathProgramCache]: Analyzing trace with hash -416260760, now seen corresponding path program 1 times [2021-11-03 05:19:19,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:19,128 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [496724572] [2021-11-03 05:19:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:19,128 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:19,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:19,130 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:19,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-03 05:19:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:19,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:19:19,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:19,817 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 05:19:19,842 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 21 treesize of output 17 [2021-11-03 05:19:19,892 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 23 treesize of output 11 [2021-11-03 05:19:19,931 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 05:19:19,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:20,123 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 05:19:20,124 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:20,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [496724572] [2021-11-03 05:19:20,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [496724572] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:20,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:20,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 05:19:20,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478683517] [2021-11-03 05:19:20,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:19:20,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:19:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:19:20,129 INFO L87 Difference]: Start difference. First operand 2317 states and 3281 transitions. Second operand has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 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 05:19:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:19:28,037 INFO L93 Difference]: Finished difference Result 3131 states and 4240 transitions. [2021-11-03 05:19:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-03 05:19:28,038 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 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 05:19:28,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:19:28,051 INFO L225 Difference]: With dead ends: 3131 [2021-11-03 05:19:28,051 INFO L226 Difference]: Without dead ends: 3131 [2021-11-03 05:19:28,051 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:19:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3131 states. [2021-11-03 05:19:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3131 to 2316. [2021-11-03 05:19:28,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2316 states, 1752 states have (on average 1.8715753424657535) internal successors, (3279), 2315 states have internal predecessors, (3279), 0 states have call successors, (0), 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 05:19:28,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2316 states to 2316 states and 3279 transitions. [2021-11-03 05:19:28,105 INFO L78 Accepts]: Start accepts. Automaton has 2316 states and 3279 transitions. Word has length 59 [2021-11-03 05:19:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:19:28,105 INFO L470 AbstractCegarLoop]: Abstraction has 2316 states and 3279 transitions. [2021-11-03 05:19:28,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 11.8) internal successors, (59), 6 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 05:19:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2316 states and 3279 transitions. [2021-11-03 05:19:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:19:28,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:19:28,107 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:19:28,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-03 05:19:28,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:19:28,321 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr67ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:19:28,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:19:28,321 INFO L85 PathProgramCache]: Analyzing trace with hash -19181353, now seen corresponding path program 1 times [2021-11-03 05:19:28,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:19:28,322 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [998126640] [2021-11-03 05:19:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:19:28,322 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:19:28,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:19:28,323 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:19:28,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-03 05:19:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:19:28,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-03 05:19:28,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:19:28,990 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 05:19:29,024 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 05:19:29,051 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 05:19:29,143 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 05:19:29,148 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 05:19:29,251 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 05:19:29,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:19:29,841 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 05:19:29,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:19:29,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [998126640] [2021-11-03 05:19:29,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [998126640] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:19:29,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:19:29,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-03 05:19:29,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135503304] [2021-11-03 05:19:29,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:19:29,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:19:29,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:19:29,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:19:29,844 INFO L87 Difference]: Start difference. First operand 2316 states and 3279 transitions. Second operand has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 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 05:20:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:00,636 INFO L93 Difference]: Finished difference Result 2892 states and 3899 transitions. [2021-11-03 05:20:00,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:20:00,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:20:00,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:00,648 INFO L225 Difference]: With dead ends: 2892 [2021-11-03 05:20:00,649 INFO L226 Difference]: Without dead ends: 2892 [2021-11-03 05:20:00,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 110 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 05:20:00,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2892 states. [2021-11-03 05:20:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2892 to 2315. [2021-11-03 05:20:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2315 states, 1752 states have (on average 1.870433789954338) internal successors, (3277), 2314 states have internal predecessors, (3277), 0 states have call successors, (0), 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 05:20:00,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2315 states to 2315 states and 3277 transitions. [2021-11-03 05:20:00,701 INFO L78 Accepts]: Start accepts. Automaton has 2315 states and 3277 transitions. Word has length 60 [2021-11-03 05:20:00,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:00,702 INFO L470 AbstractCegarLoop]: Abstraction has 2315 states and 3277 transitions. [2021-11-03 05:20:00,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 7.666666666666667) internal successors, (69), 10 states have internal predecessors, (69), 0 states have call successors, (0), 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 05:20:00,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2315 states and 3277 transitions. [2021-11-03 05:20:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-03 05:20:00,704 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:00,704 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:00,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-03 05:20:00,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:00,923 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:20:00,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:00,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1927168386, now seen corresponding path program 1 times [2021-11-03 05:20:00,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:00,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [311669654] [2021-11-03 05:20:00,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:00,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:00,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:00,925 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:00,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-03 05:20:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:01,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 05:20:01,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:01,769 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 05:20:01,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:01,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:01,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [311669654] [2021-11-03 05:20:01,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [311669654] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:20:01,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:20:01,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-03 05:20:01,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032954240] [2021-11-03 05:20:01,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:20:01,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:01,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:20:01,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:20:01,962 INFO L87 Difference]: Start difference. First operand 2315 states and 3277 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) 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 05:20:02,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:02,379 INFO L93 Difference]: Finished difference Result 3146 states and 4249 transitions. [2021-11-03 05:20:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-03 05:20:02,380 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) 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 64 [2021-11-03 05:20:02,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:02,399 INFO L225 Difference]: With dead ends: 3146 [2021-11-03 05:20:02,399 INFO L226 Difference]: Without dead ends: 3146 [2021-11-03 05:20:02,400 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 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 05:20:02,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3146 states. [2021-11-03 05:20:02,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3146 to 2333. [2021-11-03 05:20:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 1770 states have (on average 1.8615819209039548) internal successors, (3295), 2332 states have internal predecessors, (3295), 0 states have call successors, (0), 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 05:20:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3295 transitions. [2021-11-03 05:20:02,449 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3295 transitions. Word has length 64 [2021-11-03 05:20:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:02,449 INFO L470 AbstractCegarLoop]: Abstraction has 2333 states and 3295 transitions. [2021-11-03 05:20:02,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) 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 05:20:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3295 transitions. [2021-11-03 05:20:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-03 05:20:02,453 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:02,453 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] [2021-11-03 05:20:02,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:02,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:02,667 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:20:02,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash -938951394, now seen corresponding path program 1 times [2021-11-03 05:20:02,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:02,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [939176456] [2021-11-03 05:20:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:02,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:02,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:02,669 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:02,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-03 05:20:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:20:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:03,665 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 05:20:03,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:03,976 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 05:20:03,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [939176456] [2021-11-03 05:20:03,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [939176456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:03,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [313131450] [2021-11-03 05:20:03,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:03,978 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:20:03,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:20:03,980 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:20:03,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-03 05:20:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:04,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:20:04,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:05,149 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 05:20:05,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:05,300 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 05:20:05,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [313131450] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:05,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488030248] [2021-11-03 05:20:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:20:05,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:20:05,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:20:05,305 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:20:05,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-03 05:20:06,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:20:06,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 05:20:06,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:06,227 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 05:20:06,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:06,371 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 05:20:06,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488030248] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:06,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:20:06,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-11-03 05:20:06,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109246965] [2021-11-03 05:20:06,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-03 05:20:06,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:06,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-03 05:20:06,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-03 05:20:06,374 INFO L87 Difference]: Start difference. First operand 2333 states and 3295 transitions. Second operand has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 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 05:20:07,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:07,194 INFO L93 Difference]: Finished difference Result 3182 states and 4285 transitions. [2021-11-03 05:20:07,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-03 05:20:07,195 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-03 05:20:07,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:07,203 INFO L225 Difference]: With dead ends: 3182 [2021-11-03 05:20:07,203 INFO L226 Difference]: Without dead ends: 3182 [2021-11-03 05:20:07,204 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 382 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-11-03 05:20:07,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3182 states. [2021-11-03 05:20:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3182 to 2369. [2021-11-03 05:20:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2369 states, 1806 states have (on average 1.8444075304540422) internal successors, (3331), 2368 states have internal predecessors, (3331), 0 states have call successors, (0), 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 05:20:07,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2369 states to 2369 states and 3331 transitions. [2021-11-03 05:20:07,296 INFO L78 Accepts]: Start accepts. Automaton has 2369 states and 3331 transitions. Word has length 66 [2021-11-03 05:20:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:07,296 INFO L470 AbstractCegarLoop]: Abstraction has 2369 states and 3331 transitions. [2021-11-03 05:20:07,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.2) internal successors, (72), 10 states have internal predecessors, (72), 0 states have call successors, (0), 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 05:20:07,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2369 states and 3331 transitions. [2021-11-03 05:20:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-03 05:20:07,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:07,298 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] [2021-11-03 05:20:07,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:07,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:07,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:07,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:20:07,904 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:20:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:07,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1093747294, now seen corresponding path program 2 times [2021-11-03 05:20:07,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:07,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501510321] [2021-11-03 05:20:07,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:20:07,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:07,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:07,907 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:07,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-03 05:20:08,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:20:08,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:08,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:20:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:09,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:09,900 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:09,900 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:09,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501510321] [2021-11-03 05:20:09,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501510321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:09,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [162173721] [2021-11-03 05:20:09,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:20:09,901 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:20:09,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:20:09,902 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:20:09,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-03 05:20:11,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:20:11,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:11,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:20:11,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:12,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:12,349 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:12,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [162173721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:12,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360285943] [2021-11-03 05:20:12,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-03 05:20:12,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:20:12,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:20:12,352 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:20:12,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-03 05:20:31,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-03 05:20:31,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:32,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-03 05:20:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:32,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:32,476 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:32,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360285943] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:32,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-11-03 05:20:32,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-11-03 05:20:32,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337273148] [2021-11-03 05:20:32,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-03 05:20:32,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 05:20:32,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-03 05:20:32,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-11-03 05:20:32,479 INFO L87 Difference]: Start difference. First operand 2369 states and 3331 transitions. Second operand has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 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 05:20:36,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:20:36,989 INFO L93 Difference]: Finished difference Result 3254 states and 4357 transitions. [2021-11-03 05:20:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-03 05:20:36,990 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 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 70 [2021-11-03 05:20:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:20:36,998 INFO L225 Difference]: With dead ends: 3254 [2021-11-03 05:20:36,999 INFO L226 Difference]: Without dead ends: 3254 [2021-11-03 05:20:37,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=370, Invalid=622, Unknown=0, NotChecked=0, Total=992 [2021-11-03 05:20:37,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2021-11-03 05:20:37,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 2441. [2021-11-03 05:20:37,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2441 states, 1878 states have (on average 1.8120340788072418) internal successors, (3403), 2440 states have internal predecessors, (3403), 0 states have call successors, (0), 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 05:20:37,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2441 states to 2441 states and 3403 transitions. [2021-11-03 05:20:37,051 INFO L78 Accepts]: Start accepts. Automaton has 2441 states and 3403 transitions. Word has length 70 [2021-11-03 05:20:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:20:37,051 INFO L470 AbstractCegarLoop]: Abstraction has 2441 states and 3403 transitions. [2021-11-03 05:20:37,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.444444444444445) internal successors, (80), 18 states have internal predecessors, (80), 0 states have call successors, (0), 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 05:20:37,052 INFO L276 IsEmpty]: Start isEmpty. Operand 2441 states and 3403 transitions. [2021-11-03 05:20:37,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-03 05:20:37,053 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:20:37,053 INFO L513 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:20:37,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:37,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (20)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:37,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-03 05:20:37,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 05:20:37,667 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr70REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 758 more)] === [2021-11-03 05:20:37,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:20:37,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1408996130, now seen corresponding path program 3 times [2021-11-03 05:20:37,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 05:20:37,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1115532426] [2021-11-03 05:20:37,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:20:37,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 05:20:37,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 05:20:37,669 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 05:20:37,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-03 05:20:39,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 05:20:39,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:39,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:20:39,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:39,916 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:39,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:41,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 05:20:41,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1115532426] [2021-11-03 05:20:41,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1115532426] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:41,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [385480051] [2021-11-03 05:20:41,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:20:41,580 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 05:20:41,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 05:20:41,581 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 05:20:41,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-03 05:20:50,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-03 05:20:50,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-03 05:20:50,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 05:20:50,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:20:50,965 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:50,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:20:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:20:51,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [385480051] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-03 05:20:51,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93919264] [2021-11-03 05:20:51,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-03 05:20:51,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:20:51,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:20:51,202 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:20:51,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_02a2f659-5462-433e-abb0-6e3d1ae2ddab/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process