./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba --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 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:48:24,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:48:24,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:48:24,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:48:24,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:48:24,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:48:24,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:48:24,885 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:48:24,886 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:48:24,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:48:24,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:48:24,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:48:24,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:48:24,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:48:24,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:48:24,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:48:24,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:48:24,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:48:24,897 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:48:24,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:48:24,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:48:24,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:48:24,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:48:24,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:48:24,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:48:24,908 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:48:24,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:48:24,910 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:48:24,910 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:48:24,911 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:48:24,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:48:24,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:48:24,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:48:24,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:48:24,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:48:24,916 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:48:24,917 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:48:24,917 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:48:24,917 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:48:24,918 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:48:24,919 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:48:24,920 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-22 01:48:24,945 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:48:24,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:48:24,946 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:48:24,946 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:48:24,947 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:48:24,947 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:48:24,947 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:48:24,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:48:24,948 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:48:24,948 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-22 01:48:24,949 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:48:24,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:48:24,949 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-22 01:48:24,949 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-22 01:48:24,950 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:48:24,950 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-22 01:48:24,950 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-22 01:48:24,950 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-22 01:48:24,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:48:24,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:48:24,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:48:24,952 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:48:24,952 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:48:24,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:48:24,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:48:24,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:48:24,953 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:48:24,953 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:48:24,954 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:48:24,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:48:24,954 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:48:24,954 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:48:24,955 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:48:24,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:48:24,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:48:24,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:48:24,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:48:24,956 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-22 01:48:24,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:48:24,956 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-22 01:48:24,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-22 01:48:24,956 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:48:24,957 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad [2022-11-22 01:48:25,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:48:25,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:48:25,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:48:25,206 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:48:25,206 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:48:25,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-11-22 01:48:28,404 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:48:28,675 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:48:28,676 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-11-22 01:48:28,683 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/data/8c9f32d1f/24996739905c45b3828cf8703ec57c98/FLAG8b3b49a42 [2022-11-22 01:48:28,704 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/data/8c9f32d1f/24996739905c45b3828cf8703ec57c98 [2022-11-22 01:48:28,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:48:28,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:48:28,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:48:28,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:48:28,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:48:28,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:48:28" (1/1) ... [2022-11-22 01:48:28,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37605e24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:28, skipping insertion in model container [2022-11-22 01:48:28,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:48:28" (1/1) ... [2022-11-22 01:48:28,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:48:28,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:48:28,953 WARN L237 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_d3771fc8-4407-4d5e-8a5c-52f87076e02a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-11-22 01:48:28,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:48:28,977 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2022-11-22 01:48:28,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@45af815d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:28, skipping insertion in model container [2022-11-22 01:48:28,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:48:28,978 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-22 01:48:28,980 INFO L158 Benchmark]: Toolchain (without parser) took 267.96ms. Allocated memory is still 167.8MB. Free memory was 138.5MB in the beginning and 128.9MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:48:28,981 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 69.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-22 01:48:28,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 262.14ms. Allocated memory is still 167.8MB. Free memory was 138.5MB in the beginning and 128.9MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-22 01:48:28,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory is still 69.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 262.14ms. Allocated memory is still 167.8MB. Free memory was 138.5MB in the beginning and 128.9MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: Unsupported Syntax Found a cast between two array/pointer types of different sizes 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/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba --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 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-b5237d8 [2022-11-22 01:48:31,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-22 01:48:31,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-22 01:48:31,277 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-22 01:48:31,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-22 01:48:31,279 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-22 01:48:31,280 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-22 01:48:31,282 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-22 01:48:31,283 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-22 01:48:31,285 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-22 01:48:31,286 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-22 01:48:31,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-22 01:48:31,287 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-22 01:48:31,288 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-22 01:48:31,289 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-22 01:48:31,291 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-22 01:48:31,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-22 01:48:31,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-22 01:48:31,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-22 01:48:31,296 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-22 01:48:31,297 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-22 01:48:31,298 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-22 01:48:31,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-22 01:48:31,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-22 01:48:31,304 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-22 01:48:31,304 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-22 01:48:31,305 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-22 01:48:31,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-22 01:48:31,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-22 01:48:31,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-22 01:48:31,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-22 01:48:31,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-22 01:48:31,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-22 01:48:31,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-22 01:48:31,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-22 01:48:31,312 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-22 01:48:31,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-22 01:48:31,313 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-22 01:48:31,313 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-22 01:48:31,314 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-22 01:48:31,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-22 01:48:31,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2022-11-22 01:48:31,340 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-22 01:48:31,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-22 01:48:31,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-22 01:48:31,341 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-22 01:48:31,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-22 01:48:31,342 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-22 01:48:31,342 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-22 01:48:31,342 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-22 01:48:31,343 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-22 01:48:31,343 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-22 01:48:31,343 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-22 01:48:31,343 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-22 01:48:31,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-22 01:48:31,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-22 01:48:31,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-22 01:48:31,345 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-22 01:48:31,345 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-22 01:48:31,346 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-22 01:48:31,346 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-22 01:48:31,346 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-22 01:48:31,347 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-22 01:48:31,347 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-22 01:48:31,347 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-22 01:48:31,347 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-22 01:48:31,348 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-22 01:48:31,348 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-22 01:48:31,348 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-22 01:48:31,349 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-22 01:48:31,349 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-22 01:48:31,349 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-22 01:48:31,350 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-22 01:48:31,350 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-22 01:48:31,350 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:48:31,351 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-22 01:48:31,351 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-22 01:48:31,351 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-22 01:48:31,351 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-22 01:48:31,352 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-22 01:48:31,352 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-22 01:48:31,352 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_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 306d85d0b5300749928a8392783cd7ec5acf0c4622b6bdba80c3589786dd98ad [2022-11-22 01:48:31,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-22 01:48:31,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-22 01:48:31,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-22 01:48:31,726 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-22 01:48:31,731 INFO L275 PluginConnector]: CDTParser initialized [2022-11-22 01:48:31,733 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/../../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-11-22 01:48:34,901 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-22 01:48:35,113 INFO L351 CDTParser]: Found 1 translation units. [2022-11-22 01:48:35,113 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2022-11-22 01:48:35,125 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/data/302f4173b/6f44dd24b57d4a32be4a6f16b66f1244/FLAGe0f79e68c [2022-11-22 01:48:35,151 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/data/302f4173b/6f44dd24b57d4a32be4a6f16b66f1244 [2022-11-22 01:48:35,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-22 01:48:35,160 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-22 01:48:35,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-22 01:48:35,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-22 01:48:35,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-22 01:48:35,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd5e71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35, skipping insertion in model container [2022-11-22 01:48:35,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,177 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-22 01:48:35,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:48:35,475 WARN L237 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_d3771fc8-4407-4d5e-8a5c-52f87076e02a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-11-22 01:48:35,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:48:35,530 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-22 01:48:35,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-22 01:48:35,577 WARN L237 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_d3771fc8-4407-4d5e-8a5c-52f87076e02a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-11-22 01:48:35,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:48:35,594 INFO L203 MainTranslator]: Completed pre-run [2022-11-22 01:48:35,637 WARN L237 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_d3771fc8-4407-4d5e-8a5c-52f87076e02a/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c[2823,2836] [2022-11-22 01:48:35,649 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-22 01:48:35,671 INFO L208 MainTranslator]: Completed translation [2022-11-22 01:48:35,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35 WrapperNode [2022-11-22 01:48:35,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-22 01:48:35,674 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-22 01:48:35,674 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-22 01:48:35,674 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-22 01:48:35,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,695 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,723 INFO L138 Inliner]: procedures = 28, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 225 [2022-11-22 01:48:35,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-22 01:48:35,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-22 01:48:35,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-22 01:48:35,725 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-22 01:48:35,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,762 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-22 01:48:35,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-22 01:48:35,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-22 01:48:35,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-22 01:48:35,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (1/1) ... [2022-11-22 01:48:35,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-22 01:48:35,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:48:35,807 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-22 01:48:35,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-22 01:48:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-22 01:48:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-22 01:48:35,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-22 01:48:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-22 01:48:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-22 01:48:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-22 01:48:35,877 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-22 01:48:35,877 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-22 01:48:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-22 01:48:35,878 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-22 01:48:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-22 01:48:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-22 01:48:35,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-22 01:48:35,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-22 01:48:35,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-22 01:48:35,879 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-22 01:48:35,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-22 01:48:35,881 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-22 01:48:36,033 INFO L235 CfgBuilder]: Building ICFG [2022-11-22 01:48:36,035 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-22 01:48:37,099 INFO L276 CfgBuilder]: Performing block encoding [2022-11-22 01:48:37,266 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-22 01:48:37,267 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-22 01:48:37,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:48:37 BoogieIcfgContainer [2022-11-22 01:48:37,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-22 01:48:37,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-22 01:48:37,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-22 01:48:37,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-22 01:48:37,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:48:35" (1/3) ... [2022-11-22 01:48:37,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f957501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:48:37, skipping insertion in model container [2022-11-22 01:48:37,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:48:35" (2/3) ... [2022-11-22 01:48:37,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f957501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:48:37, skipping insertion in model container [2022-11-22 01:48:37,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:48:37" (3/3) ... [2022-11-22 01:48:37,286 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2022-11-22 01:48:37,305 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-22 01:48:37,306 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 46 error locations. [2022-11-22 01:48:37,306 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-22 01:48:37,486 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-22 01:48:37,539 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-22 01:48:37,563 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 340 places, 357 transitions, 738 flow [2022-11-22 01:48:37,568 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 340 places, 357 transitions, 738 flow [2022-11-22 01:48:37,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 340 places, 357 transitions, 738 flow [2022-11-22 01:48:37,759 INFO L130 PetriNetUnfolder]: 27/354 cut-off events. [2022-11-22 01:48:37,760 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-22 01:48:37,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 367 conditions, 354 events. 27/354 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 412 event pairs, 0 based on Foata normal form. 0/281 useless extension candidates. Maximal degree in co-relation 274. Up to 3 conditions per place. [2022-11-22 01:48:37,774 INFO L119 LiptonReduction]: Number of co-enabled transitions 5194 [2022-11-22 01:49:53,747 INFO L134 LiptonReduction]: Checked pairs total: 9109 [2022-11-22 01:49:53,747 INFO L136 LiptonReduction]: Total number of compositions: 419 [2022-11-22 01:49:53,760 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 84 transitions, 192 flow [2022-11-22 01:49:54,072 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 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) [2022-11-22 01:49:54,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-22 01:49:54,102 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@64d9527c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-22 01:49:54,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-22 01:49:54,120 INFO L276 IsEmpty]: Start isEmpty. Operand has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 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) [2022-11-22 01:49:54,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:49:54,128 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:54,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:49:54,129 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:49:54,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:54,138 INFO L85 PathProgramCache]: Analyzing trace with hash 45785, now seen corresponding path program 1 times [2022-11-22 01:49:54,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:49:54,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704204805] [2022-11-22 01:49:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:49:54,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:49:54,163 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:49:54,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-22 01:49:54,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-22 01:49:54,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:54,529 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:49:54,530 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:49:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:54,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:54,572 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:49:54,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704204805] [2022-11-22 01:49:54,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704204805] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:54,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:54,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:49:54,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420119245] [2022-11-22 01:49:54,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:54,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:54,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:49:54,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:54,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:54,653 INFO L87 Difference]: Start difference. First operand has 4936 states, 3750 states have (on average 5.039733333333333) internal successors, (18899), 4935 states have internal predecessors, (18899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 01:49:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:55,247 INFO L93 Difference]: Finished difference Result 2816 states and 10887 transitions. [2022-11-22 01:49:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:55,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-22 01:49:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:55,301 INFO L225 Difference]: With dead ends: 2816 [2022-11-22 01:49:55,301 INFO L226 Difference]: Without dead ends: 2816 [2022-11-22 01:49:55,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:55,308 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:55,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 4 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:49:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2816 states. [2022-11-22 01:49:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2816 to 2816. [2022-11-22 01:49:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2364 states have (on average 4.605329949238579) internal successors, (10887), 2815 states have internal predecessors, (10887), 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) [2022-11-22 01:49:55,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 10887 transitions. [2022-11-22 01:49:55,570 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 10887 transitions. Word has length 2 [2022-11-22 01:49:55,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:55,570 INFO L495 AbstractCegarLoop]: Abstraction has 2816 states and 10887 transitions. [2022-11-22 01:49:55,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 01:49:55,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 10887 transitions. [2022-11-22 01:49:55,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-22 01:49:55,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:55,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-22 01:49:55,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-22 01:49:55,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:49:55,788 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:49:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash 45786, now seen corresponding path program 1 times [2022-11-22 01:49:55,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:49:55,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524569165] [2022-11-22 01:49:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:55,790 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:49:55,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:49:55,803 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:49:55,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-22 01:49:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:55,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:49:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:56,062 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:49:56,063 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:49:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:56,122 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:49:56,122 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:49:56,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524569165] [2022-11-22 01:49:56,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524569165] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:49:56,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:49:56,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-22 01:49:56,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968851438] [2022-11-22 01:49:56,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:49:56,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:49:56,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:49:56,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:49:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:56,125 INFO L87 Difference]: Start difference. First operand 2816 states and 10887 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 01:49:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:49:56,948 INFO L93 Difference]: Finished difference Result 2817 states and 10889 transitions. [2022-11-22 01:49:56,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:49:56,949 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-22 01:49:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:49:56,980 INFO L225 Difference]: With dead ends: 2817 [2022-11-22 01:49:56,980 INFO L226 Difference]: Without dead ends: 2817 [2022-11-22 01:49:56,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:49:56,985 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:49:56,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:49:56,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2817 states. [2022-11-22 01:49:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2817 to 2817. [2022-11-22 01:49:57,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2817 states, 2365 states have (on average 4.604228329809725) internal successors, (10889), 2816 states have internal predecessors, (10889), 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) [2022-11-22 01:49:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2817 states to 2817 states and 10889 transitions. [2022-11-22 01:49:57,155 INFO L78 Accepts]: Start accepts. Automaton has 2817 states and 10889 transitions. Word has length 2 [2022-11-22 01:49:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:49:57,155 INFO L495 AbstractCegarLoop]: Abstraction has 2817 states and 10889 transitions. [2022-11-22 01:49:57,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-22 01:49:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2817 states and 10889 transitions. [2022-11-22 01:49:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-22 01:49:57,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:49:57,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-22 01:49:57,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-11-22 01:49:57,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:49:57,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:49:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:49:57,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1428107, now seen corresponding path program 1 times [2022-11-22 01:49:57,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:49:57,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1153218350] [2022-11-22 01:49:57,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:57,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:49:57,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:49:57,414 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:49:57,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-22 01:49:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:49:57,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:57,691 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:49:57,692 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:49:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:57,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:49:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:58,077 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:49:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1153218350] [2022-11-22 01:49:58,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1153218350] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:49:58,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [394750491] [2022-11-22 01:49:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:58,078 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:49:58,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:49:58,081 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:49:58,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2022-11-22 01:49:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:49:58,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:58,446 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:49:58,446 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:49:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:58,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:49:58,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [394750491] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:49:58,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636978961] [2022-11-22 01:49:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:49:58,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:49:58,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:49:58,695 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:49:58,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-22 01:49:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:49:58,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:49:58,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:49:58,963 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:49:58,964 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:49:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:59,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:49:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:49:59,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636978961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:49:59,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:49:59,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 7 [2022-11-22 01:49:59,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868719761] [2022-11-22 01:49:59,213 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:49:59,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-22 01:49:59,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:49:59,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-22 01:49:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:49:59,215 INFO L87 Difference]: Start difference. First operand 2817 states and 10889 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:01,496 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:02,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:05,827 INFO L93 Difference]: Finished difference Result 11255 states and 43547 transitions. [2022-11-22 01:50:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-22 01:50:05,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-22 01:50:05,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:06,071 INFO L225 Difference]: With dead ends: 11255 [2022-11-22 01:50:06,072 INFO L226 Difference]: Without dead ends: 11255 [2022-11-22 01:50:06,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-11-22 01:50:06,080 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 335 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:06,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 32 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-11-22 01:50:06,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11255 states. [2022-11-22 01:50:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11255 to 2828. [2022-11-22 01:50:06,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2376 states have (on average 4.601851851851852) internal successors, (10934), 2827 states have internal predecessors, (10934), 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) [2022-11-22 01:50:06,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 10934 transitions. [2022-11-22 01:50:06,425 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 10934 transitions. Word has length 3 [2022-11-22 01:50:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:06,425 INFO L495 AbstractCegarLoop]: Abstraction has 2828 states and 10934 transitions. [2022-11-22 01:50:06,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:50:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 10934 transitions. [2022-11-22 01:50:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-22 01:50:06,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:06,426 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-22 01:50:06,435 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-22 01:50:06,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:06,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:07,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:07,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:50:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:07,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1372766544, now seen corresponding path program 1 times [2022-11-22 01:50:07,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593384387] [2022-11-22 01:50:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:07,034 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:50:07,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:07,035 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:50:07,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-22 01:50:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:07,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 01:50:07,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:07,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:07,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:07,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:07,403 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [593384387] [2022-11-22 01:50:07,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [593384387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:07,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [386804271] [2022-11-22 01:50:07,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:07,404 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:07,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:07,407 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:07,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2022-11-22 01:50:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:07,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:50:07,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:07,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:07,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [386804271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:07,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037881516] [2022-11-22 01:50:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:50:07,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:07,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:07,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:07,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-22 01:50:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:50:07,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:50:07,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-22 01:50:07,955 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:50:07,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037881516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:50:07,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2022-11-22 01:50:07,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 12 [2022-11-22 01:50:07,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495612452] [2022-11-22 01:50:07,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:50:07,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:50:07,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:07,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:50:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-11-22 01:50:07,958 INFO L87 Difference]: Start difference. First operand 2828 states and 10934 transitions. Second operand has 4 states, 4 states have (on average 1.25) 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) [2022-11-22 01:50:08,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:50:08,607 INFO L93 Difference]: Finished difference Result 2828 states and 10926 transitions. [2022-11-22 01:50:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:50:08,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) 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 [2022-11-22 01:50:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:50:08,626 INFO L225 Difference]: With dead ends: 2828 [2022-11-22 01:50:08,626 INFO L226 Difference]: Without dead ends: 2828 [2022-11-22 01:50:08,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-22 01:50:08,627 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:50:08,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 10 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:50:08,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2828 states. [2022-11-22 01:50:08,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2828 to 2828. [2022-11-22 01:50:08,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2376 states have (on average 4.598484848484849) internal successors, (10926), 2827 states have internal predecessors, (10926), 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) [2022-11-22 01:50:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 10926 transitions. [2022-11-22 01:50:08,771 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 10926 transitions. Word has length 5 [2022-11-22 01:50:08,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:50:08,771 INFO L495 AbstractCegarLoop]: Abstraction has 2828 states and 10926 transitions. [2022-11-22 01:50:08,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) 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) [2022-11-22 01:50:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 10926 transitions. [2022-11-22 01:50:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-22 01:50:08,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:50:08,772 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-11-22 01:50:08,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:08,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:09,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-22 01:50:09,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:50:09,375 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:50:09,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:50:09,376 INFO L85 PathProgramCache]: Analyzing trace with hash -396257510, now seen corresponding path program 2 times [2022-11-22 01:50:09,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:50:09,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [412878370] [2022-11-22 01:50:09,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:50:09,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:50:09,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:50:09,378 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:50:09,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-22 01:50:09,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:50:09,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:50:09,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:09,683 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:50:09,684 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:50:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:09,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:10,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:50:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [412878370] [2022-11-22 01:50:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [412878370] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609757886] [2022-11-22 01:50:10,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:50:10,742 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:50:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:50:10,747 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:50:10,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2022-11-22 01:50:10,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:50:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:10,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:50:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:11,182 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:50:11,183 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:50:11,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:11,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:12,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609757886] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:12,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15902945] [2022-11-22 01:50:12,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:50:12,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:50:12,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:50:12,363 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:50:12,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-22 01:50:12,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:50:12,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:50:12,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:50:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:50:12,678 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:50:12,679 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:50:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:12,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:50:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:50:13,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15902945] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:50:13,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:50:13,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 19 [2022-11-22 01:50:13,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828345487] [2022-11-22 01:50:13,204 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:50:13,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-22 01:50:13,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:50:13,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-22 01:50:13,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:50:13,205 INFO L87 Difference]: Start difference. First operand 2828 states and 10926 transitions. Second operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-11-22 01:50:17,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:19,951 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:21,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:22,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:24,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:26,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:28,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:31,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:33,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:35,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:37,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:39,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:41,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:42,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:44,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:45,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:47,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:49,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:52,751 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:54,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:50:57,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:00,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:51:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:13,527 INFO L93 Difference]: Finished difference Result 25321 states and 97968 transitions. [2022-11-22 01:51:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-22 01:51:13,529 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 [2022-11-22 01:51:13,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:13,835 INFO L225 Difference]: With dead ends: 25321 [2022-11-22 01:51:13,836 INFO L226 Difference]: Without dead ends: 25321 [2022-11-22 01:51:13,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2022-11-22 01:51:13,837 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1583 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 152 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 3043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.2s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:13,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 192 Invalid, 3043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 2881 Invalid, 10 Unknown, 0 Unchecked, 57.2s Time] [2022-11-22 01:51:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25321 states. [2022-11-22 01:51:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25321 to 2845. [2022-11-22 01:51:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2393 states have (on average 4.596740493104889) internal successors, (11000), 2844 states have internal predecessors, (11000), 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) [2022-11-22 01:51:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 11000 transitions. [2022-11-22 01:51:14,377 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 11000 transitions. Word has length 6 [2022-11-22 01:51:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:14,377 INFO L495 AbstractCegarLoop]: Abstraction has 2845 states and 11000 transitions. [2022-11-22 01:51:14,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2022-11-22 01:51:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 11000 transitions. [2022-11-22 01:51:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:51:14,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:14,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:14,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:14,593 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:14,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:14,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:51:14,986 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:14,988 INFO L85 PathProgramCache]: Analyzing trace with hash 670808880, now seen corresponding path program 1 times [2022-11-22 01:51:14,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:14,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [439314278] [2022-11-22 01:51:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:14,989 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:14,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-22 01:51:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:15,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:51:15,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:15,281 INFO L321 Elim1Store]: treesize reduction 103, result has 24.8 percent of original size [2022-11-22 01:51:15,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 59 [2022-11-22 01:51:15,464 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-22 01:51:15,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 64 [2022-11-22 01:51:15,865 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-22 01:51:15,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 76 [2022-11-22 01:51:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:16,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:51:16,411 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:16,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [439314278] [2022-11-22 01:51:16,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [439314278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:16,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:16,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:16,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163914893] [2022-11-22 01:51:16,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:16,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:51:16,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:16,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:51:16,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:51:16,413 INFO L87 Difference]: Start difference. First operand 2845 states and 11000 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:17,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:17,362 INFO L93 Difference]: Finished difference Result 2844 states and 10990 transitions. [2022-11-22 01:51:17,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:51:17,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-11-22 01:51:17,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:17,380 INFO L225 Difference]: With dead ends: 2844 [2022-11-22 01:51:17,380 INFO L226 Difference]: Without dead ends: 2844 [2022-11-22 01:51:17,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:51:17,381 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 114 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:17,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 3 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:51:17,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2022-11-22 01:51:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 2844. [2022-11-22 01:51:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2844 states, 2393 states have (on average 4.592561638111158) internal successors, (10990), 2843 states have internal predecessors, (10990), 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) [2022-11-22 01:51:17,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2844 states to 2844 states and 10990 transitions. [2022-11-22 01:51:17,473 INFO L78 Accepts]: Start accepts. Automaton has 2844 states and 10990 transitions. Word has length 7 [2022-11-22 01:51:17,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:17,474 INFO L495 AbstractCegarLoop]: Abstraction has 2844 states and 10990 transitions. [2022-11-22 01:51:17,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:17,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2844 states and 10990 transitions. [2022-11-22 01:51:17,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:51:17,475 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:17,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:17,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:17,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:17,688 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:17,689 INFO L85 PathProgramCache]: Analyzing trace with hash 670808832, now seen corresponding path program 1 times [2022-11-22 01:51:17,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:17,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644647022] [2022-11-22 01:51:17,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:17,689 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:17,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:17,690 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:17,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-22 01:51:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:17,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:51:17,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:17,961 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:51:17,962 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:51:18,003 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:51:18,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 01:51:18,035 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 01:51:18,035 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-22 01:51:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:18,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:51:18,048 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:18,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644647022] [2022-11-22 01:51:18,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644647022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:18,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:18,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:51:18,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504449212] [2022-11-22 01:51:18,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:18,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:51:18,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:18,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:51:18,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:51:18,050 INFO L87 Difference]: Start difference. First operand 2844 states and 10990 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-22 01:51:18,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:18,432 INFO L93 Difference]: Finished difference Result 2311 states and 8932 transitions. [2022-11-22 01:51:18,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:51:18,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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 7 [2022-11-22 01:51:18,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:18,445 INFO L225 Difference]: With dead ends: 2311 [2022-11-22 01:51:18,445 INFO L226 Difference]: Without dead ends: 2311 [2022-11-22 01:51:18,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:51:18,446 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 113 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:18,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 4 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:51:18,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2022-11-22 01:51:18,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 2311. [2022-11-22 01:51:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1990 states have (on average 4.488442211055276) internal successors, (8932), 2310 states have internal predecessors, (8932), 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) [2022-11-22 01:51:18,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 8932 transitions. [2022-11-22 01:51:18,515 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 8932 transitions. Word has length 7 [2022-11-22 01:51:18,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:18,515 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 8932 transitions. [2022-11-22 01:51:18,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 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) [2022-11-22 01:51:18,515 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 8932 transitions. [2022-11-22 01:51:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:51:18,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:18,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:18,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:18,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:18,729 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:18,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:18,730 INFO L85 PathProgramCache]: Analyzing trace with hash 670808881, now seen corresponding path program 1 times [2022-11-22 01:51:18,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:18,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050238491] [2022-11-22 01:51:18,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:18,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:18,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:18,732 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:18,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-22 01:51:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:18,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:51:18,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:19,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:19,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:19,115 INFO L321 Elim1Store]: treesize reduction 49, result has 38.8 percent of original size [2022-11-22 01:51:19,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 38 [2022-11-22 01:51:19,163 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-11-22 01:51:19,163 INFO L350 Elim1Store]: Elim1 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 44 treesize of output 45 [2022-11-22 01:51:19,305 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-22 01:51:19,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 42 [2022-11-22 01:51:19,537 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-22 01:51:19,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 44 [2022-11-22 01:51:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:19,695 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:51:19,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:19,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050238491] [2022-11-22 01:51:19,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1050238491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:19,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:19,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:19,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696994152] [2022-11-22 01:51:19,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:19,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:51:19,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:51:19,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:51:19,697 INFO L87 Difference]: Start difference. First operand 2311 states and 8932 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:20,277 INFO L93 Difference]: Finished difference Result 1878 states and 7026 transitions. [2022-11-22 01:51:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:51:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-11-22 01:51:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:20,286 INFO L225 Difference]: With dead ends: 1878 [2022-11-22 01:51:20,286 INFO L226 Difference]: Without dead ends: 1878 [2022-11-22 01:51:20,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:51:20,287 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:20,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 8 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:51:20,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2022-11-22 01:51:20,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1878. [2022-11-22 01:51:20,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1878 states, 1630 states have (on average 4.310429447852761) internal successors, (7026), 1877 states have internal predecessors, (7026), 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) [2022-11-22 01:51:20,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1878 states to 1878 states and 7026 transitions. [2022-11-22 01:51:20,342 INFO L78 Accepts]: Start accepts. Automaton has 1878 states and 7026 transitions. Word has length 7 [2022-11-22 01:51:20,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:20,342 INFO L495 AbstractCegarLoop]: Abstraction has 1878 states and 7026 transitions. [2022-11-22 01:51:20,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:20,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1878 states and 7026 transitions. [2022-11-22 01:51:20,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:51:20,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:20,343 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:20,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2022-11-22 01:51:20,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:20,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:20,556 INFO L85 PathProgramCache]: Analyzing trace with hash 670808833, now seen corresponding path program 1 times [2022-11-22 01:51:20,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:20,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557609884] [2022-11-22 01:51:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:20,557 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:20,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:20,559 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:20,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-22 01:51:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:20,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-22 01:51:20,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:20,744 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-22 01:51:20,770 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-22 01:51:20,771 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-22 01:51:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:20,790 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:51:20,791 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557609884] [2022-11-22 01:51:20,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557609884] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:20,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:20,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229032337] [2022-11-22 01:51:20,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:20,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:51:20,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:20,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:51:20,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:51:20,793 INFO L87 Difference]: Start difference. First operand 1878 states and 7026 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:21,217 INFO L93 Difference]: Finished difference Result 1497 states and 5592 transitions. [2022-11-22 01:51:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:51:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-11-22 01:51:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:21,225 INFO L225 Difference]: With dead ends: 1497 [2022-11-22 01:51:21,225 INFO L226 Difference]: Without dead ends: 1497 [2022-11-22 01:51:21,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:51:21,226 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 102 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:21,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 3 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:51:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2022-11-22 01:51:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1497. [2022-11-22 01:51:21,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1330 states have (on average 4.204511278195489) internal successors, (5592), 1496 states have internal predecessors, (5592), 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) [2022-11-22 01:51:21,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 5592 transitions. [2022-11-22 01:51:21,303 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 5592 transitions. Word has length 7 [2022-11-22 01:51:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:21,303 INFO L495 AbstractCegarLoop]: Abstraction has 1497 states and 5592 transitions. [2022-11-22 01:51:21,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:21,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 5592 transitions. [2022-11-22 01:51:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:51:21,304 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:21,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:21,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:21,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:21,517 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash 670808834, now seen corresponding path program 1 times [2022-11-22 01:51:21,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:21,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934713257] [2022-11-22 01:51:21,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:21,518 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:21,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:21,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:21,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-22 01:51:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:21,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:51:21,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:21,876 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:51:21,876 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:51:22,025 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:51:22,026 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:51:22,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:22,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:51:22,138 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:51:22,139 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:51:22,218 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:51:22,218 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:51:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:22,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:51:22,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:22,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934713257] [2022-11-22 01:51:22,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934713257] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:22,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:22,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:22,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587323541] [2022-11-22 01:51:22,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:22,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:51:22,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:51:22,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:51:22,279 INFO L87 Difference]: Start difference. First operand 1497 states and 5592 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:23,141 INFO L93 Difference]: Finished difference Result 1496 states and 5582 transitions. [2022-11-22 01:51:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:51:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-11-22 01:51:23,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:23,146 INFO L225 Difference]: With dead ends: 1496 [2022-11-22 01:51:23,146 INFO L226 Difference]: Without dead ends: 1496 [2022-11-22 01:51:23,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:51:23,147 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:23,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 3 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-22 01:51:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2022-11-22 01:51:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1496. [2022-11-22 01:51:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1330 states have (on average 4.196992481203008) internal successors, (5582), 1495 states have internal predecessors, (5582), 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) [2022-11-22 01:51:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 5582 transitions. [2022-11-22 01:51:23,195 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 5582 transitions. Word has length 7 [2022-11-22 01:51:23,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:23,196 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 5582 transitions. [2022-11-22 01:51:23,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 5582 transitions. [2022-11-22 01:51:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-22 01:51:23,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:23,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:23,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:23,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:23,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:23,404 INFO L85 PathProgramCache]: Analyzing trace with hash 670808835, now seen corresponding path program 1 times [2022-11-22 01:51:23,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:23,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437608076] [2022-11-22 01:51:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:23,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:23,405 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:23,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-22 01:51:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:23,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:51:23,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:23,611 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:51:23,680 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:51:23,680 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:51:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:23,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:51:23,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:23,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437608076] [2022-11-22 01:51:23,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437608076] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:23,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:23,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:51:23,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839501025] [2022-11-22 01:51:23,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:23,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:51:23,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:51:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:51:23,743 INFO L87 Difference]: Start difference. First operand 1496 states and 5582 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:24,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:24,301 INFO L93 Difference]: Finished difference Result 1495 states and 5572 transitions. [2022-11-22 01:51:24,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:51:24,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2022-11-22 01:51:24,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:24,318 INFO L225 Difference]: With dead ends: 1495 [2022-11-22 01:51:24,319 INFO L226 Difference]: Without dead ends: 1495 [2022-11-22 01:51:24,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:51:24,320 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 100 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:24,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 3 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-22 01:51:24,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1495 states. [2022-11-22 01:51:24,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1495 to 1495. [2022-11-22 01:51:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1330 states have (on average 4.189473684210526) internal successors, (5572), 1494 states have internal predecessors, (5572), 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) [2022-11-22 01:51:24,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 5572 transitions. [2022-11-22 01:51:24,363 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 5572 transitions. Word has length 7 [2022-11-22 01:51:24,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:24,363 INFO L495 AbstractCegarLoop]: Abstraction has 1495 states and 5572 transitions. [2022-11-22 01:51:24,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 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) [2022-11-22 01:51:24,364 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 5572 transitions. [2022-11-22 01:51:24,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:51:24,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:24,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:24,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:24,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:24,577 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:24,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash 402273356, now seen corresponding path program 1 times [2022-11-22 01:51:24,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:24,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1131228963] [2022-11-22 01:51:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:24,578 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:24,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:24,579 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:24,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-22 01:51:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:24,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-22 01:51:24,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:24,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:24,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:51:24,916 INFO L321 Elim1Store]: treesize reduction 43, result has 41.9 percent of original size [2022-11-22 01:51:24,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 36 [2022-11-22 01:51:24,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 12 [2022-11-22 01:51:25,020 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-22 01:51:25,021 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 24 [2022-11-22 01:51:25,228 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-22 01:51:25,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 45 [2022-11-22 01:51:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:25,741 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:51:25,741 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:25,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1131228963] [2022-11-22 01:51:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1131228963] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:25,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:25,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:51:25,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068984842] [2022-11-22 01:51:25,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:25,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:51:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:51:25,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:51:25,743 INFO L87 Difference]: Start difference. First operand 1495 states and 5572 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-22 01:51:27,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:27,044 INFO L93 Difference]: Finished difference Result 1445 states and 5421 transitions. [2022-11-22 01:51:27,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:51:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-22 01:51:27,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:27,050 INFO L225 Difference]: With dead ends: 1445 [2022-11-22 01:51:27,050 INFO L226 Difference]: Without dead ends: 1445 [2022-11-22 01:51:27,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-22 01:51:27,051 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 98 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:27,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 9 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-22 01:51:27,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2022-11-22 01:51:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1445. [2022-11-22 01:51:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1298 states have (on average 4.176425269645609) internal successors, (5421), 1444 states have internal predecessors, (5421), 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) [2022-11-22 01:51:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 5421 transitions. [2022-11-22 01:51:27,088 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 5421 transitions. Word has length 9 [2022-11-22 01:51:27,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:27,088 INFO L495 AbstractCegarLoop]: Abstraction has 1445 states and 5421 transitions. [2022-11-22 01:51:27,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-22 01:51:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 5421 transitions. [2022-11-22 01:51:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-22 01:51:27,089 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:27,089 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:51:27,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:27,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:27,303 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:27,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:27,303 INFO L85 PathProgramCache]: Analyzing trace with hash 402273357, now seen corresponding path program 1 times [2022-11-22 01:51:27,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:27,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627976761] [2022-11-22 01:51:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:27,304 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:27,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:27,305 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:27,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-22 01:51:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:51:27,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:27,642 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-22 01:51:27,642 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 29 treesize of output 52 [2022-11-22 01:51:27,875 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-22 01:51:27,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 68 [2022-11-22 01:51:28,323 INFO L321 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2022-11-22 01:51:28,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 84 [2022-11-22 01:51:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:29,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:51:29,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:29,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627976761] [2022-11-22 01:51:29,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627976761] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:51:29,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:51:29,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:51:29,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865877810] [2022-11-22 01:51:29,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:51:29,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:51:29,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:29,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:51:29,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:51:29,039 INFO L87 Difference]: Start difference. First operand 1445 states and 5421 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-22 01:51:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:51:29,349 INFO L93 Difference]: Finished difference Result 1395 states and 5270 transitions. [2022-11-22 01:51:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:51:29,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-11-22 01:51:29,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:51:29,355 INFO L225 Difference]: With dead ends: 1395 [2022-11-22 01:51:29,355 INFO L226 Difference]: Without dead ends: 1395 [2022-11-22 01:51:29,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:51:29,356 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 141 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:51:29,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 4 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:51:29,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-11-22 01:51:29,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1395. [2022-11-22 01:51:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1266 states have (on average 4.162717219589258) internal successors, (5270), 1394 states have internal predecessors, (5270), 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) [2022-11-22 01:51:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 5270 transitions. [2022-11-22 01:51:29,401 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 5270 transitions. Word has length 9 [2022-11-22 01:51:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:51:29,401 INFO L495 AbstractCegarLoop]: Abstraction has 1395 states and 5270 transitions. [2022-11-22 01:51:29,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 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) [2022-11-22 01:51:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 5270 transitions. [2022-11-22 01:51:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:51:29,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:51:29,402 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2022-11-22 01:51:29,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-22 01:51:29,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:29,616 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:51:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:51:29,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1098014314, now seen corresponding path program 1 times [2022-11-22 01:51:29,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:51:29,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1968403750] [2022-11-22 01:51:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:29,617 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:51:29,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:51:29,618 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:51:29,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-22 01:51:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:29,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:51:29,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:29,827 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:51:29,997 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:51:29,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:51:31,209 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:51:31,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1968403750] [2022-11-22 01:51:31,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1968403750] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:51:31,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [798076296] [2022-11-22 01:51:31,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:31,209 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:51:31,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:51:31,210 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:51:31,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2022-11-22 01:51:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:51:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:51:31,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:51:32,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [798076296] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:51:32,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706210863] [2022-11-22 01:51:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:51:32,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:51:32,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:51:32,148 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:51:32,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-22 01:51:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:51:32,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-22 01:51:32,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:51:32,397 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:51:32,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:51:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:51:32,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706210863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:51:32,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:51:32,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 5, 5, 5, 5] total 25 [2022-11-22 01:51:32,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741989794] [2022-11-22 01:51:32,533 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:51:32,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-22 01:51:32,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:51:32,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-22 01:51:32,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-11-22 01:51:32,534 INFO L87 Difference]: Start difference. First operand 1395 states and 5270 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 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) [2022-11-22 01:51:38,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:04,302 INFO L93 Difference]: Finished difference Result 13644 states and 52109 transitions. [2022-11-22 01:52:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 01:52:04,304 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 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 10 [2022-11-22 01:52:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:04,352 INFO L225 Difference]: With dead ends: 13644 [2022-11-22 01:52:04,352 INFO L226 Difference]: Without dead ends: 13644 [2022-11-22 01:52:04,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:52:04,353 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1786 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 3140 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1786 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:04,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1786 Valid, 216 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3140 Invalid, 0 Unknown, 0 Unchecked, 28.6s Time] [2022-11-22 01:52:04,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13644 states. [2022-11-22 01:52:04,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13644 to 1413. [2022-11-22 01:52:04,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1284 states have (on average 4.127725856697819) internal successors, (5300), 1412 states have internal predecessors, (5300), 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) [2022-11-22 01:52:04,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 5300 transitions. [2022-11-22 01:52:04,524 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 5300 transitions. Word has length 10 [2022-11-22 01:52:04,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:04,525 INFO L495 AbstractCegarLoop]: Abstraction has 1413 states and 5300 transitions. [2022-11-22 01:52:04,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 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) [2022-11-22 01:52:04,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 5300 transitions. [2022-11-22 01:52:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-22 01:52:04,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:04,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:04,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:04,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:04,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:05,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:52:05,135 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:52:05,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash -414437614, now seen corresponding path program 1 times [2022-11-22 01:52:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:52:05,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050812382] [2022-11-22 01:52:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:05,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:52:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:52:05,137 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:52:05,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-22 01:52:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:05,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:52:05,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:05,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:05,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:05,518 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:52:05,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050812382] [2022-11-22 01:52:05,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050812382] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:05,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1572137449] [2022-11-22 01:52:05,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:52:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:52:05,520 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:52:05,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-11-22 01:52:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:52:05,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:05,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:05,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1572137449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:06,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135825707] [2022-11-22 01:52:06,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:06,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:06,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:06,003 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:06,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-22 01:52:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:06,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:52:06,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:06,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:06,331 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:52:06,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135825707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:06,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:52:06,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2022-11-22 01:52:06,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996526492] [2022-11-22 01:52:06,332 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:52:06,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:52:06,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:52:06,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:52:06,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:52:06,333 INFO L87 Difference]: Start difference. First operand 1413 states and 5300 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 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) [2022-11-22 01:52:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:08,557 INFO L93 Difference]: Finished difference Result 1992 states and 7178 transitions. [2022-11-22 01:52:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:52:08,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 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 10 [2022-11-22 01:52:08,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:08,563 INFO L225 Difference]: With dead ends: 1992 [2022-11-22 01:52:08,563 INFO L226 Difference]: Without dead ends: 1992 [2022-11-22 01:52:08,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:52:08,564 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 287 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:08,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 52 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-22 01:52:08,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2022-11-22 01:52:08,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1726. [2022-11-22 01:52:08,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1597 states have (on average 4.034439574201628) internal successors, (6443), 1725 states have internal predecessors, (6443), 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) [2022-11-22 01:52:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 6443 transitions. [2022-11-22 01:52:08,604 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 6443 transitions. Word has length 10 [2022-11-22 01:52:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:08,605 INFO L495 AbstractCegarLoop]: Abstraction has 1726 states and 6443 transitions. [2022-11-22 01:52:08,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 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) [2022-11-22 01:52:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 6443 transitions. [2022-11-22 01:52:08,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:52:08,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:08,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:08,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:08,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:09,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:09,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:09,219 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:52:09,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:09,220 INFO L85 PathProgramCache]: Analyzing trace with hash 37672514, now seen corresponding path program 1 times [2022-11-22 01:52:09,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:52:09,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [21731866] [2022-11-22 01:52:09,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:09,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:52:09,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:52:09,221 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:52:09,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-22 01:52:09,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 01:52:09,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:09,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:52:09,600 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-22 01:52:09,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2022-11-22 01:52:09,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 16 [2022-11-22 01:52:09,667 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-22 01:52:09,667 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 20 [2022-11-22 01:52:09,804 INFO L321 Elim1Store]: treesize reduction 28, result has 45.1 percent of original size [2022-11-22 01:52:09,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 42 [2022-11-22 01:52:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:52:10,036 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:52:10,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:52:10,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [21731866] [2022-11-22 01:52:10,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [21731866] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:10,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:10,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:52:10,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343904286] [2022-11-22 01:52:10,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:10,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:52:10,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:52:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:52:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:52:10,038 INFO L87 Difference]: Start difference. First operand 1726 states and 6443 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:10,676 INFO L93 Difference]: Finished difference Result 1650 states and 6206 transitions. [2022-11-22 01:52:10,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:52:10,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:52:10,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:10,682 INFO L225 Difference]: With dead ends: 1650 [2022-11-22 01:52:10,682 INFO L226 Difference]: Without dead ends: 1650 [2022-11-22 01:52:10,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:52:10,683 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:10,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 9 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:52:10,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-11-22 01:52:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2022-11-22 01:52:10,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1539 states have (on average 4.032488628979857) internal successors, (6206), 1649 states have internal predecessors, (6206), 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) [2022-11-22 01:52:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 6206 transitions. [2022-11-22 01:52:10,747 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 6206 transitions. Word has length 11 [2022-11-22 01:52:10,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:10,748 INFO L495 AbstractCegarLoop]: Abstraction has 1650 states and 6206 transitions. [2022-11-22 01:52:10,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:10,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 6206 transitions. [2022-11-22 01:52:10,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-22 01:52:10,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:10,749 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:52:10,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:10,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:52:10,963 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:52:10,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:10,963 INFO L85 PathProgramCache]: Analyzing trace with hash 37672515, now seen corresponding path program 1 times [2022-11-22 01:52:10,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:52:10,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831606162] [2022-11-22 01:52:10,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:52:10,964 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:52:10,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:52:10,965 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:52:10,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-22 01:52:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:52:11,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:52:11,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:11,345 INFO L321 Elim1Store]: treesize reduction 93, result has 26.8 percent of original size [2022-11-22 01:52:11,345 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 41 [2022-11-22 01:52:11,386 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:52:11,386 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 28 [2022-11-22 01:52:11,437 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-22 01:52:11,437 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 31 [2022-11-22 01:52:11,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:52:11,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:52:11,545 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:52:11,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831606162] [2022-11-22 01:52:11,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831606162] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:52:11,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:52:11,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:52:11,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011468778] [2022-11-22 01:52:11,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:52:11,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:52:11,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:52:11,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:52:11,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:52:11,547 INFO L87 Difference]: Start difference. First operand 1650 states and 6206 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:11,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:52:11,858 INFO L93 Difference]: Finished difference Result 1574 states and 5969 transitions. [2022-11-22 01:52:11,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:52:11,859 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-22 01:52:11,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:52:11,865 INFO L225 Difference]: With dead ends: 1574 [2022-11-22 01:52:11,865 INFO L226 Difference]: Without dead ends: 1574 [2022-11-22 01:52:11,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:52:11,866 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:52:11,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 4 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:52:11,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2022-11-22 01:52:11,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1574. [2022-11-22 01:52:11,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1481 states have (on average 4.030384875084402) internal successors, (5969), 1573 states have internal predecessors, (5969), 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) [2022-11-22 01:52:11,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5969 transitions. [2022-11-22 01:52:11,910 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5969 transitions. Word has length 11 [2022-11-22 01:52:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:52:11,911 INFO L495 AbstractCegarLoop]: Abstraction has 1574 states and 5969 transitions. [2022-11-22 01:52:11,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:52:11,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5969 transitions. [2022-11-22 01:52:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:52:11,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:52:11,913 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1] [2022-11-22 01:52:11,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-22 01:52:12,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:52:12,126 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:52:12,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:52:12,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1122946694, now seen corresponding path program 3 times [2022-11-22 01:52:12,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:52:12,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745297732] [2022-11-22 01:52:12,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:52:12,127 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:52:12,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:52:12,130 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:52:12,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-22 01:52:12,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:52:12,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:52:12,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:52:12,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:12,524 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:52:12,524 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:52:13,048 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:13,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:15,894 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:15,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:52:15,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745297732] [2022-11-22 01:52:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745297732] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:15,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551707189] [2022-11-22 01:52:15,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:52:15,895 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:52:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:52:15,897 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:52:15,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-22 01:52:16,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:52:16,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:52:16,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:52:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:16,871 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:52:16,872 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:52:17,096 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:17,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:17,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551707189] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:17,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766660856] [2022-11-22 01:52:17,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 01:52:17,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:52:17,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:52:17,532 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:52:17,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-22 01:52:20,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 01:52:20,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:52:20,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 01:52:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:52:20,417 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:52:20,417 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:52:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:21,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:52:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:52:21,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766660856] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:52:21,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:52:21,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 32 [2022-11-22 01:52:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099245206] [2022-11-22 01:52:21,681 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:52:21,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-22 01:52:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:52:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-22 01:52:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2022-11-22 01:52:21,682 INFO L87 Difference]: Start difference. First operand 1574 states and 5969 transitions. Second operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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) [2022-11-22 01:52:39,972 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:41,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:43,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:45,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:47,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:49,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:51,995 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:53,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:55,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:52:58,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:05,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:07,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:09,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:11,289 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:13,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:15,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:17,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:19,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:21,300 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:23,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:53:31,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:31,758 INFO L93 Difference]: Finished difference Result 14181 states and 54790 transitions. [2022-11-22 01:53:31,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-22 01:53:31,760 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 01:53:31,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:31,808 INFO L225 Difference]: With dead ends: 14181 [2022-11-22 01:53:31,809 INFO L226 Difference]: Without dead ends: 14181 [2022-11-22 01:53:31,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2022-11-22 01:53:31,809 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 2291 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 5895 mSolverCounterSat, 493 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2291 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 6408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 5895 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:31,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2291 Valid, 444 Invalid, 6408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 5895 Invalid, 20 Unknown, 0 Unchecked, 54.9s Time] [2022-11-22 01:53:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14181 states. [2022-11-22 01:53:32,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14181 to 1577. [2022-11-22 01:53:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1577 states, 1484 states have (on average 4.024932614555256) internal successors, (5973), 1576 states have internal predecessors, (5973), 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) [2022-11-22 01:53:32,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1577 states to 1577 states and 5973 transitions. [2022-11-22 01:53:32,063 INFO L78 Accepts]: Start accepts. Automaton has 1577 states and 5973 transitions. Word has length 12 [2022-11-22 01:53:32,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:32,065 INFO L495 AbstractCegarLoop]: Abstraction has 1577 states and 5973 transitions. [2022-11-22 01:53:32,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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) [2022-11-22 01:53:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 1577 states and 5973 transitions. [2022-11-22 01:53:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-22 01:53:32,066 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:32,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:32,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:32,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:32,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:32,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:53:32,677 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:53:32,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1167838490, now seen corresponding path program 1 times [2022-11-22 01:53:32,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:53:32,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349385965] [2022-11-22 01:53:32,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:32,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:53:32,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:53:32,679 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:53:32,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-22 01:53:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:32,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:53:32,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:53:32,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:53:33,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:53:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349385965] [2022-11-22 01:53:33,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349385965] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:33,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1175853528] [2022-11-22 01:53:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:33,086 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:53:33,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:53:33,087 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:53:33,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-22 01:53:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:33,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:53:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:33,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:53:33,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:53:33,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1175853528] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:33,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156041253] [2022-11-22 01:53:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:33,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:33,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:33,632 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:33,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-22 01:53:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-22 01:53:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:53:33,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:34,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-22 01:53:34,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156041253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:34,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:53:34,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 5, 5] total 14 [2022-11-22 01:53:34,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333896524] [2022-11-22 01:53:34,016 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:34,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-22 01:53:34,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:53:34,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-22 01:53:34,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-11-22 01:53:34,017 INFO L87 Difference]: Start difference. First operand 1577 states and 5973 transitions. Second operand has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-11-22 01:53:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:35,943 INFO L93 Difference]: Finished difference Result 1529 states and 5610 transitions. [2022-11-22 01:53:35,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-22 01:53:35,945 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-22 01:53:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:35,972 INFO L225 Difference]: With dead ends: 1529 [2022-11-22 01:53:35,972 INFO L226 Difference]: Without dead ends: 1529 [2022-11-22 01:53:35,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-11-22 01:53:35,973 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 240 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:35,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 36 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-22 01:53:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2022-11-22 01:53:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1483. [2022-11-22 01:53:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1390 states have (on average 3.9719424460431654) internal successors, (5521), 1482 states have internal predecessors, (5521), 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) [2022-11-22 01:53:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 5521 transitions. [2022-11-22 01:53:36,003 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 5521 transitions. Word has length 12 [2022-11-22 01:53:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:36,004 INFO L495 AbstractCegarLoop]: Abstraction has 1483 states and 5521 transitions. [2022-11-22 01:53:36,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 15 states have internal predecessors, (43), 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) [2022-11-22 01:53:36,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 5521 transitions. [2022-11-22 01:53:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:53:36,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:36,006 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:36,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:36,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:36,417 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:36,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:53:36,614 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:53:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:36,614 INFO L85 PathProgramCache]: Analyzing trace with hash -447324957, now seen corresponding path program 2 times [2022-11-22 01:53:36,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:53:36,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [197652458] [2022-11-22 01:53:36,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:53:36,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:53:36,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:53:36,616 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:53:36,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-11-22 01:53:36,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 01:53:36,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:53:36,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:53:36,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:36,947 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:53:36,947 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:53:37,092 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:53:37,093 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:53:37,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:37,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:53:37,214 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:53:37,214 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:53:37,298 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:53:37,298 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:53:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:53:37,408 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:53:37,408 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:53:37,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [197652458] [2022-11-22 01:53:37,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [197652458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:53:37,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:53:37,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:53:37,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102831318] [2022-11-22 01:53:37,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:53:37,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:53:37,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:53:37,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:53:37,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:53:37,410 INFO L87 Difference]: Start difference. First operand 1483 states and 5521 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-22 01:53:38,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:38,061 INFO L93 Difference]: Finished difference Result 2433 states and 9273 transitions. [2022-11-22 01:53:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:53:38,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 [2022-11-22 01:53:38,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:38,068 INFO L225 Difference]: With dead ends: 2433 [2022-11-22 01:53:38,068 INFO L226 Difference]: Without dead ends: 2433 [2022-11-22 01:53:38,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:53:38,069 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 129 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:38,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 7 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-22 01:53:38,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2022-11-22 01:53:38,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1625. [2022-11-22 01:53:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1532 states have (on average 4.134464751958225) internal successors, (6334), 1624 states have internal predecessors, (6334), 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) [2022-11-22 01:53:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 6334 transitions. [2022-11-22 01:53:38,104 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 6334 transitions. Word has length 13 [2022-11-22 01:53:38,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:38,104 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 6334 transitions. [2022-11-22 01:53:38,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-22 01:53:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 6334 transitions. [2022-11-22 01:53:38,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-22 01:53:38,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:38,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:38,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:38,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:53:38,306 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:53:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1843581693, now seen corresponding path program 1 times [2022-11-22 01:53:38,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:53:38,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506374295] [2022-11-22 01:53:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:38,307 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:53:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:53:38,308 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:53:38,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-22 01:53:38,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-22 01:53:38,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:53:38,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:53:38,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:53:38,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506374295] [2022-11-22 01:53:38,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506374295] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:53:38,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:53:38,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-22 01:53:38,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008800182] [2022-11-22 01:53:38,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:53:38,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-22 01:53:38,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:53:38,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-22 01:53:38,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:38,536 INFO L87 Difference]: Start difference. First operand 1625 states and 6334 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) [2022-11-22 01:53:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:53:38,815 INFO L93 Difference]: Finished difference Result 1199 states and 4415 transitions. [2022-11-22 01:53:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-22 01:53:38,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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 13 [2022-11-22 01:53:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:53:38,819 INFO L225 Difference]: With dead ends: 1199 [2022-11-22 01:53:38,820 INFO L226 Difference]: Without dead ends: 1199 [2022-11-22 01:53:38,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-22 01:53:38,820 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:53:38,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 4 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:53:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2022-11-22 01:53:38,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 1199. [2022-11-22 01:53:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1151 states have (on average 3.835794960903562) internal successors, (4415), 1198 states have internal predecessors, (4415), 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) [2022-11-22 01:53:38,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 4415 transitions. [2022-11-22 01:53:38,843 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 4415 transitions. Word has length 13 [2022-11-22 01:53:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:53:38,843 INFO L495 AbstractCegarLoop]: Abstraction has 1199 states and 4415 transitions. [2022-11-22 01:53:38,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 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) [2022-11-22 01:53:38,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 4415 transitions. [2022-11-22 01:53:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:53:38,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:53:38,844 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:53:38,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-11-22 01:53:39,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:53:39,046 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:53:39,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:53:39,047 INFO L85 PathProgramCache]: Analyzing trace with hash -982164820, now seen corresponding path program 1 times [2022-11-22 01:53:39,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:53:39,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [402960229] [2022-11-22 01:53:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:39,047 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:53:39,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:53:39,048 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:53:39,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-22 01:53:39,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:53:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:39,363 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:53:39,466 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:53:39,466 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 23 [2022-11-22 01:53:39,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:53:39,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:53:40,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:53:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [402960229] [2022-11-22 01:53:40,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [402960229] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:40,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [383522092] [2022-11-22 01:53:40,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:40,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:53:40,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:53:40,346 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:53:40,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2022-11-22 01:53:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:41,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:53:41,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:41,306 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:53:41,319 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-22 01:53:41,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:53:41,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:53:41,466 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:53:41,466 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:53:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:53:41,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:42,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:53:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:53:42,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [383522092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:42,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979685006] [2022-11-22 01:53:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:53:42,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:53:42,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:53:42,968 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:53:42,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-22 01:53:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:53:43,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 01:53:43,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:53:43,274 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:53:43,415 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:53:43,416 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:53:43,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:53:43,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:53:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:53:45,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979685006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:53:45,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:53:45,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 7, 7] total 31 [2022-11-22 01:53:45,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739329228] [2022-11-22 01:53:45,605 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:53:45,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:53:45,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:53:45,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:53:45,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-22 01:53:45,607 INFO L87 Difference]: Start difference. First operand 1199 states and 4415 transitions. Second operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 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) [2022-11-22 01:54:04,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:04,021 INFO L93 Difference]: Finished difference Result 2844 states and 10500 transitions. [2022-11-22 01:54:04,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 01:54:04,023 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 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 14 [2022-11-22 01:54:04,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:04,032 INFO L225 Difference]: With dead ends: 2844 [2022-11-22 01:54:04,033 INFO L226 Difference]: Without dead ends: 2844 [2022-11-22 01:54:04,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=670, Invalid=2522, Unknown=0, NotChecked=0, Total=3192 [2022-11-22 01:54:04,034 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 994 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:04,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 93 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-22 01:54:04,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2844 states. [2022-11-22 01:54:04,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2844 to 1405. [2022-11-22 01:54:04,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1357 states have (on average 3.778187177597642) internal successors, (5127), 1404 states have internal predecessors, (5127), 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) [2022-11-22 01:54:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5127 transitions. [2022-11-22 01:54:04,067 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5127 transitions. Word has length 14 [2022-11-22 01:54:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:04,067 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 5127 transitions. [2022-11-22 01:54:04,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 32 states have internal predecessors, (56), 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) [2022-11-22 01:54:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5127 transitions. [2022-11-22 01:54:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:54:04,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:04,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:04,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:04,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:04,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:04,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:04,671 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:54:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:04,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1316450491, now seen corresponding path program 1 times [2022-11-22 01:54:04,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:54:04,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1519724612] [2022-11-22 01:54:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:04,672 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:04,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:54:04,674 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:54:04,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-22 01:54:04,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:04,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-22 01:54:04,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:04,892 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-22 01:54:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:54:04,918 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:54:04,918 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:54:04,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1519724612] [2022-11-22 01:54:04,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1519724612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:04,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:04,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:54:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630891894] [2022-11-22 01:54:04,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:04,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-22 01:54:04,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:54:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-22 01:54:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-22 01:54:04,919 INFO L87 Difference]: Start difference. First operand 1405 states and 5127 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-22 01:54:05,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:05,222 INFO L93 Difference]: Finished difference Result 1073 states and 3873 transitions. [2022-11-22 01:54:05,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-22 01:54:05,224 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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 14 [2022-11-22 01:54:05,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:05,241 INFO L225 Difference]: With dead ends: 1073 [2022-11-22 01:54:05,242 INFO L226 Difference]: Without dead ends: 1073 [2022-11-22 01:54:05,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:54:05,242 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:05,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 4 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-22 01:54:05,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2022-11-22 01:54:05,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 1073. [2022-11-22 01:54:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1046 states have (on average 3.702676864244742) internal successors, (3873), 1072 states have internal predecessors, (3873), 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) [2022-11-22 01:54:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3873 transitions. [2022-11-22 01:54:05,260 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3873 transitions. Word has length 14 [2022-11-22 01:54:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:05,260 INFO L495 AbstractCegarLoop]: Abstraction has 1073 states and 3873 transitions. [2022-11-22 01:54:05,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 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) [2022-11-22 01:54:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3873 transitions. [2022-11-22 01:54:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-22 01:54:05,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:05,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:05,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:05,467 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:54:05,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1316450493, now seen corresponding path program 1 times [2022-11-22 01:54:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:54:05,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394658499] [2022-11-22 01:54:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:05,468 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:05,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:54:05,469 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:54:05,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2022-11-22 01:54:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:05,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:54:05,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:05,719 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:54:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:54:05,883 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:54:05,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:54:05,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394658499] [2022-11-22 01:54:05,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1394658499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:05,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:05,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-22 01:54:05,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956317297] [2022-11-22 01:54:05,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:05,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-22 01:54:05,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:54:05,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-22 01:54:05,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:54:05,884 INFO L87 Difference]: Start difference. First operand 1073 states and 3873 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-22 01:54:06,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:06,441 INFO L93 Difference]: Finished difference Result 1573 states and 5871 transitions. [2022-11-22 01:54:06,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:54:06,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2022-11-22 01:54:06,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:06,461 INFO L225 Difference]: With dead ends: 1573 [2022-11-22 01:54:06,461 INFO L226 Difference]: Without dead ends: 1573 [2022-11-22 01:54:06,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-22 01:54:06,461 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 109 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:06,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 7 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:54:06,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1573 states. [2022-11-22 01:54:06,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1573 to 1239. [2022-11-22 01:54:06,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1212 states have (on average 3.972772277227723) internal successors, (4815), 1238 states have internal predecessors, (4815), 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) [2022-11-22 01:54:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 4815 transitions. [2022-11-22 01:54:06,483 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 4815 transitions. Word has length 14 [2022-11-22 01:54:06,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:06,484 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 4815 transitions. [2022-11-22 01:54:06,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-22 01:54:06,484 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 4815 transitions. [2022-11-22 01:54:06,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:54:06,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:06,484 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:06,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:06,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:06,686 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:54:06,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:06,687 INFO L85 PathProgramCache]: Analyzing trace with hash -372127061, now seen corresponding path program 2 times [2022-11-22 01:54:06,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:54:06,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408233039] [2022-11-22 01:54:06,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:54:06,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:06,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:54:06,689 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:54:06,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-22 01:54:06,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 01:54:06,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:54:06,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-22 01:54:06,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:07,059 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:54:07,059 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:54:07,204 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:54:07,204 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:54:07,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:07,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:54:07,321 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:54:07,321 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:54:07,405 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:54:07,405 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:54:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-22 01:54:07,533 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:54:07,533 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:54:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408233039] [2022-11-22 01:54:07,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408233039] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:54:07,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:54:07,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 01:54:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108565590] [2022-11-22 01:54:07,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:54:07,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:54:07,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:54:07,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:54:07,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:54:07,535 INFO L87 Difference]: Start difference. First operand 1239 states and 4815 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:08,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:08,115 INFO L93 Difference]: Finished difference Result 1917 states and 7615 transitions. [2022-11-22 01:54:08,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 01:54:08,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-22 01:54:08,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:08,121 INFO L225 Difference]: With dead ends: 1917 [2022-11-22 01:54:08,121 INFO L226 Difference]: Without dead ends: 1917 [2022-11-22 01:54:08,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-22 01:54:08,122 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 117 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:08,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 7 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 01:54:08,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-11-22 01:54:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1405. [2022-11-22 01:54:08,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1378 states have (on average 4.357764876632801) internal successors, (6005), 1404 states have internal predecessors, (6005), 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) [2022-11-22 01:54:08,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 6005 transitions. [2022-11-22 01:54:08,187 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 6005 transitions. Word has length 15 [2022-11-22 01:54:08,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:08,187 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 6005 transitions. [2022-11-22 01:54:08,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:54:08,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 6005 transitions. [2022-11-22 01:54:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:54:08,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:08,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:08,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:08,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:08,401 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:54:08,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:08,402 INFO L85 PathProgramCache]: Analyzing trace with hash -372127059, now seen corresponding path program 1 times [2022-11-22 01:54:08,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:54:08,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610758129] [2022-11-22 01:54:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:08,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:08,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:54:08,403 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:54:08,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-22 01:54:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:08,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-22 01:54:08,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:08,759 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:54:08,856 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:54:08,856 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 21 [2022-11-22 01:54:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:09,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:10,051 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:54:10,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610758129] [2022-11-22 01:54:10,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610758129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:10,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1498821663] [2022-11-22 01:54:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:10,051 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:54:10,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:54:10,052 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:54:10,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2022-11-22 01:54:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:54:10,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:11,037 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:54:11,050 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-22 01:54:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:54:11,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:54:11,178 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:54:11,178 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:54:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:11,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:12,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:54:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:12,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1498821663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:12,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231190287] [2022-11-22 01:54:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:12,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:12,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:12,707 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:12,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-22 01:54:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 01:54:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:13,059 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:54:13,207 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:54:13,207 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:54:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:13,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:17,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:17,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231190287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:17,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:54:17,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 7, 7, 7] total 31 [2022-11-22 01:54:17,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629723701] [2022-11-22 01:54:17,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:54:17,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-22 01:54:17,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:54:17,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-22 01:54:17,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=860, Unknown=1, NotChecked=0, Total=992 [2022-11-22 01:54:17,122 INFO L87 Difference]: Start difference. First operand 1405 states and 6005 transitions. Second operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 32 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) [2022-11-22 01:54:35,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:35,946 INFO L93 Difference]: Finished difference Result 2976 states and 11908 transitions. [2022-11-22 01:54:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-22 01:54:35,947 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 32 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 15 [2022-11-22 01:54:35,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:35,968 INFO L225 Difference]: With dead ends: 2976 [2022-11-22 01:54:35,968 INFO L226 Difference]: Without dead ends: 2976 [2022-11-22 01:54:35,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=670, Invalid=2521, Unknown=1, NotChecked=0, Total=3192 [2022-11-22 01:54:35,969 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1078 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1078 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:35,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1078 Valid, 93 Invalid, 1229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-22 01:54:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2976 states. [2022-11-22 01:54:36,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2976 to 1405. [2022-11-22 01:54:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1378 states have (on average 4.116835994194485) internal successors, (5673), 1404 states have internal predecessors, (5673), 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) [2022-11-22 01:54:36,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5673 transitions. [2022-11-22 01:54:36,017 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5673 transitions. Word has length 15 [2022-11-22 01:54:36,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:36,017 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 5673 transitions. [2022-11-22 01:54:36,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 32 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) [2022-11-22 01:54:36,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5673 transitions. [2022-11-22 01:54:36,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:54:36,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:36,019 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:36,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-11-22 01:54:36,232 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:36,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:36,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:36,628 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:54:36,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:36,628 INFO L85 PathProgramCache]: Analyzing trace with hash -372127057, now seen corresponding path program 1 times [2022-11-22 01:54:36,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:54:36,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1126010144] [2022-11-22 01:54:36,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:36,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:36,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:54:36,630 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:54:36,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-22 01:54:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:36,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-22 01:54:36,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:37,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:37,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 27 treesize of output 23 [2022-11-22 01:54:37,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:37,474 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:54:37,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1126010144] [2022-11-22 01:54:37,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1126010144] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:37,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [823050858] [2022-11-22 01:54:37,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:37,474 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:54:37,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:54:37,475 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:54:37,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2022-11-22 01:54:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:37,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:54:37,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:38,162 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:54:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:38,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:39,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [823050858] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:39,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606025850] [2022-11-22 01:54:39,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:39,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:39,001 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:39,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-22 01:54:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:54:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:39,262 INFO L350 Elim1Store]: Elim1 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 [2022-11-22 01:54:39,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:39,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:39,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606025850] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:39,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:54:39,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 7, 6, 6] total 24 [2022-11-22 01:54:39,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739552056] [2022-11-22 01:54:39,919 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:54:39,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-22 01:54:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:54:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-22 01:54:39,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-11-22 01:54:39,920 INFO L87 Difference]: Start difference. First operand 1405 states and 5673 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 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) [2022-11-22 01:54:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:48,458 INFO L93 Difference]: Finished difference Result 7468 states and 30290 transitions. [2022-11-22 01:54:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-22 01:54:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 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 15 [2022-11-22 01:54:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:48,482 INFO L225 Difference]: With dead ends: 7468 [2022-11-22 01:54:48,482 INFO L226 Difference]: Without dead ends: 7468 [2022-11-22 01:54:48,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=614, Invalid=2142, Unknown=0, NotChecked=0, Total=2756 [2022-11-22 01:54:48,484 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1688 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:48,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1688 Valid, 100 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-11-22 01:54:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7468 states. [2022-11-22 01:54:48,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7468 to 1405. [2022-11-22 01:54:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1405 states, 1378 states have (on average 3.9963715529753268) internal successors, (5507), 1404 states have internal predecessors, (5507), 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) [2022-11-22 01:54:48,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1405 states to 1405 states and 5507 transitions. [2022-11-22 01:54:48,645 INFO L78 Accepts]: Start accepts. Automaton has 1405 states and 5507 transitions. Word has length 15 [2022-11-22 01:54:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:48,646 INFO L495 AbstractCegarLoop]: Abstraction has 1405 states and 5507 transitions. [2022-11-22 01:54:48,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 25 states have internal predecessors, (45), 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) [2022-11-22 01:54:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1405 states and 5507 transitions. [2022-11-22 01:54:48,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-22 01:54:48,646 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:48,647 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:48,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:48,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:49,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:49,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:49,247 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:54:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash -382324674, now seen corresponding path program 1 times [2022-11-22 01:54:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:54:49,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1488347868] [2022-11-22 01:54:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:49,248 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:49,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:54:49,249 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:54:49,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-22 01:54:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:49,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:54:49,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:49,650 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:54:49,650 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:54:49,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 11 [2022-11-22 01:54:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:49,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:50,355 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:54:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1488347868] [2022-11-22 01:54:50,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1488347868] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:50,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [291497817] [2022-11-22 01:54:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:50,356 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:54:50,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:54:50,357 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:54:50,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2022-11-22 01:54:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:50,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:54:50,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:51,021 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:51,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:51,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [291497817] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:51,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262575512] [2022-11-22 01:54:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:51,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:54:51,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:54:51,271 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:54:51,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-22 01:54:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:54:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:51,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:51,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:51,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:51,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262575512] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:51,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:54:51,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 22 [2022-11-22 01:54:51,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123824530] [2022-11-22 01:54:51,936 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:54:51,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:54:51,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:54:51,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:54:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:54:51,937 INFO L87 Difference]: Start difference. First operand 1405 states and 5507 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 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) [2022-11-22 01:54:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:54:57,121 INFO L93 Difference]: Finished difference Result 2244 states and 8696 transitions. [2022-11-22 01:54:57,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:54:57,122 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 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 15 [2022-11-22 01:54:57,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:54:57,128 INFO L225 Difference]: With dead ends: 2244 [2022-11-22 01:54:57,128 INFO L226 Difference]: Without dead ends: 2244 [2022-11-22 01:54:57,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:54:57,129 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 650 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-22 01:54:57,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 110 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-22 01:54:57,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2244 states. [2022-11-22 01:54:57,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2244 to 1992. [2022-11-22 01:54:57,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1992 states, 1965 states have (on average 4.0508905852417305) internal successors, (7960), 1991 states have internal predecessors, (7960), 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) [2022-11-22 01:54:57,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 7960 transitions. [2022-11-22 01:54:57,178 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 7960 transitions. Word has length 15 [2022-11-22 01:54:57,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:54:57,179 INFO L495 AbstractCegarLoop]: Abstraction has 1992 states and 7960 transitions. [2022-11-22 01:54:57,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 23 states have internal predecessors, (49), 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) [2022-11-22 01:54:57,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 7960 transitions. [2022-11-22 01:54:57,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:54:57,180 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:54:57,180 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:54:57,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:57,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:57,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 0 [2022-11-22 01:54:57,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:54:57,781 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:54:57,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:54:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1348968123, now seen corresponding path program 1 times [2022-11-22 01:54:57,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:54:57,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [967444007] [2022-11-22 01:54:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:57,782 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:54:57,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:54:57,783 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:54:57,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2022-11-22 01:54:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:58,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-22 01:54:58,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:58,263 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:54:58,264 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:54:58,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 15 treesize of output 11 [2022-11-22 01:54:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:58,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:54:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:58,984 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:54:58,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [967444007] [2022-11-22 01:54:58,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [967444007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:54:58,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [570531483] [2022-11-22 01:54:58,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:54:58,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:54:58,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:54:58,991 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:54:58,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2022-11-22 01:54:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:54:59,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-22 01:54:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:54:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:54:59,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:55:00,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [570531483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:00,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039682832] [2022-11-22 01:55:00,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:00,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:00,077 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:00,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-22 01:55:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:00,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-22 01:55:00,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:00,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:55:00,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-22 01:55:00,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039682832] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:00,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:55:00,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 7, 7] total 22 [2022-11-22 01:55:00,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437522396] [2022-11-22 01:55:00,789 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:00,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-22 01:55:00,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:00,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-22 01:55:00,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-11-22 01:55:00,793 INFO L87 Difference]: Start difference. First operand 1992 states and 7960 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:06,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:06,447 INFO L93 Difference]: Finished difference Result 1914 states and 7284 transitions. [2022-11-22 01:55:06,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-22 01:55:06,449 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-22 01:55:06,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:06,454 INFO L225 Difference]: With dead ends: 1914 [2022-11-22 01:55:06,454 INFO L226 Difference]: Without dead ends: 1914 [2022-11-22 01:55:06,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=304, Invalid=886, Unknown=0, NotChecked=0, Total=1190 [2022-11-22 01:55:06,455 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 483 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:06,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 134 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-11-22 01:55:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1914 states. [2022-11-22 01:55:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1914 to 1780. [2022-11-22 01:55:06,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1780 states, 1753 states have (on average 3.9543639475185395) internal successors, (6932), 1779 states have internal predecessors, (6932), 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) [2022-11-22 01:55:06,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 6932 transitions. [2022-11-22 01:55:06,488 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 6932 transitions. Word has length 16 [2022-11-22 01:55:06,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:06,489 INFO L495 AbstractCegarLoop]: Abstraction has 1780 states and 6932 transitions. [2022-11-22 01:55:06,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:55:06,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 6932 transitions. [2022-11-22 01:55:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-22 01:55:06,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:06,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:55:06,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:06,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:06,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (53)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:07,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:55:07,099 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:55:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1906586597, now seen corresponding path program 1 times [2022-11-22 01:55:07,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:07,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2117433275] [2022-11-22 01:55:07,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:55:07,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:07,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:07,101 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:07,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-22 01:55:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:55:07,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-22 01:55:07,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-22 01:55:07,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 01:55:07,400 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:07,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2117433275] [2022-11-22 01:55:07,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2117433275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 01:55:07,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 01:55:07,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-22 01:55:07,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460183133] [2022-11-22 01:55:07,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 01:55:07,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 01:55:07,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 01:55:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 01:55:07,401 INFO L87 Difference]: Start difference. First operand 1780 states and 6932 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) [2022-11-22 01:55:08,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:55:08,292 INFO L93 Difference]: Finished difference Result 2478 states and 9638 transitions. [2022-11-22 01:55:08,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-22 01:55:08,293 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 16 [2022-11-22 01:55:08,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:55:08,305 INFO L225 Difference]: With dead ends: 2478 [2022-11-22 01:55:08,305 INFO L226 Difference]: Without dead ends: 2386 [2022-11-22 01:55:08,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 01:55:08,306 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-22 01:55:08,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 25 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-22 01:55:08,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2386 states. [2022-11-22 01:55:08,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2386 to 1704. [2022-11-22 01:55:08,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1704 states, 1666 states have (on average 3.7593037214885956) internal successors, (6263), 1703 states have internal predecessors, (6263), 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) [2022-11-22 01:55:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 6263 transitions. [2022-11-22 01:55:08,358 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 6263 transitions. Word has length 16 [2022-11-22 01:55:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:55:08,358 INFO L495 AbstractCegarLoop]: Abstraction has 1704 states and 6263 transitions. [2022-11-22 01:55:08,358 INFO L496 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) [2022-11-22 01:55:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 6263 transitions. [2022-11-22 01:55:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:55:08,359 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:55:08,359 INFO L195 NwaCegarLoop]: trace histogram [12, 3, 1, 1, 1] [2022-11-22 01:55:08,373 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-22 01:55:08,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:08,574 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:55:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:55:08,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1774753994, now seen corresponding path program 2 times [2022-11-22 01:55:08,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:55:08,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156235183] [2022-11-22 01:55:08,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:55:08,575 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:55:08,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:55:08,575 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:55:08,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2022-11-22 01:55:08,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:55:08,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:08,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 01:55:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:09,005 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:55:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 40 proven. 34 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-22 01:55:09,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 01:55:13,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:55:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156235183] [2022-11-22 01:55:13,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156235183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:13,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149180658] [2022-11-22 01:55:13,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:55:13,665 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:55:13,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:55:13,666 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:55:13,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2022-11-22 01:55:14,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:55:14,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:14,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-22 01:55:14,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:14,271 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:55:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:55:14,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:55:16,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149180658] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:16,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429511493] [2022-11-22 01:55:16,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:55:16,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:55:16,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:55:16,140 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:55:16,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-22 01:55:16,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:55:16,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:55:16,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 01:55:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:55:17,173 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:55:17,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:55:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 01:55:18,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429511493] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:55:18,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:55:18,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 9, 9, 9, 9] total 51 [2022-11-22 01:55:18,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832177460] [2022-11-22 01:55:18,967 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:55:18,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-22 01:55:18,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:55:18,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-22 01:55:18,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2378, Unknown=0, NotChecked=0, Total=2652 [2022-11-22 01:55:18,969 INFO L87 Difference]: Start difference. First operand 1704 states and 6263 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 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) [2022-11-22 01:55:53,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-11-22 01:56:05,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:56:05,420 INFO L93 Difference]: Finished difference Result 6151 states and 23068 transitions. [2022-11-22 01:56:05,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-22 01:56:05,422 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 01:56:05,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:56:05,447 INFO L225 Difference]: With dead ends: 6151 [2022-11-22 01:56:05,447 INFO L226 Difference]: Without dead ends: 6151 [2022-11-22 01:56:05,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 23.6s TimeCoverageRelationStatistics Valid=1059, Invalid=5103, Unknown=0, NotChecked=0, Total=6162 [2022-11-22 01:56:05,449 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2752 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 3282 mSolverCounterSat, 545 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2752 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 3827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 545 IncrementalHoareTripleChecker+Valid, 3282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:56:05,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2752 Valid, 267 Invalid, 3827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [545 Valid, 3282 Invalid, 0 Unknown, 0 Unchecked, 31.0s Time] [2022-11-22 01:56:05,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6151 states. [2022-11-22 01:56:05,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6151 to 1720. [2022-11-22 01:56:05,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1682 states have (on average 3.735434007134364) internal successors, (6283), 1719 states have internal predecessors, (6283), 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) [2022-11-22 01:56:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 6283 transitions. [2022-11-22 01:56:05,537 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 6283 transitions. Word has length 18 [2022-11-22 01:56:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:56:05,538 INFO L495 AbstractCegarLoop]: Abstraction has 1720 states and 6283 transitions. [2022-11-22 01:56:05,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 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) [2022-11-22 01:56:05,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 6283 transitions. [2022-11-22 01:56:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-22 01:56:05,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:56:05,538 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:56:05,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:05,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:05,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2022-11-22 01:56:06,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 01:56:06,142 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:56:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:56:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash 742216269, now seen corresponding path program 2 times [2022-11-22 01:56:06,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:56:06,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [273596782] [2022-11-22 01:56:06,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:56:06,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:56:06,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:56:06,144 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:56:06,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-22 01:56:06,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:56:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:56:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 01:56:06,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:06,711 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:56:06,711 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:56:06,865 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:56:06,866 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:56:07,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:07,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:56:07,019 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:56:07,020 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:56:07,105 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:56:07,105 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:56:07,303 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:56:07,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:56:08,257 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:56:08,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [273596782] [2022-11-22 01:56:08,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [273596782] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:08,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2128220441] [2022-11-22 01:56:08,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:56:08,258 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:56:08,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:56:08,259 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:56:08,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2022-11-22 01:56:08,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:56:08,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:56:08,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-22 01:56:08,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:09,152 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:56:09,152 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:56:09,316 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:56:09,316 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:56:09,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:09,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:56:09,720 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:56:09,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 01:56:09,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:09,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:09,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-11-22 01:56:09,976 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-22 01:56:09,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-22 01:56:10,398 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:56:10,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:15,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:56:15,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2128220441] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737754290] [2022-11-22 01:56:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:56:15,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:56:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:56:15,248 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:56:15,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-22 01:56:15,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:56:15,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:56:15,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 01:56:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:56:15,846 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:56:15,847 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:56:16,010 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:56:16,010 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:56:16,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:16,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:56:16,561 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:56:16,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 01:56:16,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:56:16,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:56:16,775 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:56:16,776 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:56:17,317 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:56:17,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:56:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:56:30,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737754290] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:56:30,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:56:30,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8, 8, 8, 9] total 39 [2022-11-22 01:56:30,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750837695] [2022-11-22 01:56:30,062 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:56:30,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-22 01:56:30,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:56:30,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-22 01:56:30,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1432, Unknown=1, NotChecked=0, Total=1640 [2022-11-22 01:56:30,064 INFO L87 Difference]: Start difference. First operand 1720 states and 6283 transitions. Second operand has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 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) [2022-11-22 01:56:47,372 WARN L233 SmtUtils]: Spent 9.43s on a formula simplification. DAG size of input: 67 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:57:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:57:19,522 INFO L93 Difference]: Finished difference Result 9054 states and 34752 transitions. [2022-11-22 01:57:19,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-22 01:57:19,524 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-22 01:57:19,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:57:19,589 INFO L225 Difference]: With dead ends: 9054 [2022-11-22 01:57:19,589 INFO L226 Difference]: Without dead ends: 9054 [2022-11-22 01:57:19,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2500 ImplicationChecksByTransitivity, 54.2s TimeCoverageRelationStatistics Valid=1844, Invalid=7275, Unknown=1, NotChecked=0, Total=9120 [2022-11-22 01:57:19,592 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3671 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3671 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 2827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-22 01:57:19,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3671 Valid, 249 Invalid, 2827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-11-22 01:57:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9054 states. [2022-11-22 01:57:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9054 to 2737. [2022-11-22 01:57:19,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2737 states, 2699 states have (on average 4.024082993701371) internal successors, (10861), 2736 states have internal predecessors, (10861), 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) [2022-11-22 01:57:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2737 states to 2737 states and 10861 transitions. [2022-11-22 01:57:19,743 INFO L78 Accepts]: Start accepts. Automaton has 2737 states and 10861 transitions. Word has length 18 [2022-11-22 01:57:19,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:57:19,744 INFO L495 AbstractCegarLoop]: Abstraction has 2737 states and 10861 transitions. [2022-11-22 01:57:19,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 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) [2022-11-22 01:57:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 2737 states and 10861 transitions. [2022-11-22 01:57:19,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:57:19,747 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:57:19,747 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:57:19,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-22 01:57:19,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2022-11-22 01:57:20,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-22 01:57:20,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:57:20,358 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:57:20,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:57:20,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1849998988, now seen corresponding path program 2 times [2022-11-22 01:57:20,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:57:20,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [12244221] [2022-11-22 01:57:20,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:57:20,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:57:20,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:57:20,360 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:57:20,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-22 01:57:20,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:57:20,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:57:20,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:57:20,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:21,007 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:57:21,007 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:57:21,169 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:57:21,169 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:57:21,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:21,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:57:21,317 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:57:21,318 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:57:21,418 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:57:21,418 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:57:21,640 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:57:21,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 01:57:23,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:57:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [12244221] [2022-11-22 01:57:23,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [12244221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:57:23,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [827315459] [2022-11-22 01:57:23,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:57:23,345 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:57:23,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:57:23,346 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:57:23,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2022-11-22 01:57:24,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:57:24,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:57:24,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 01:57:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:24,339 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:57:24,339 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:57:24,508 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:57:24,509 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:57:24,961 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:57:24,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 01:57:24,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 01:57:25,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:25,193 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-22 01:57:25,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 30 [2022-11-22 01:57:25,213 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:57:25,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-22 01:57:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:57:25,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:57:47,792 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:57:47,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [827315459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:57:47,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228497907] [2022-11-22 01:57:47,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 01:57:47,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:57:47,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:57:47,794 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:57:47,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-22 01:57:48,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-22 01:57:48,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 01:57:48,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-22 01:57:48,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:57:48,421 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 01:57:48,421 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 01:57:48,580 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 01:57:48,580 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 01:57:49,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:57:49,172 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 01:57:49,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 01:57:49,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:57:49,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:57:49,389 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:57:49,389 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:57:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:57:49,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:58:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:58:02,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228497907] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:58:02,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:58:02,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 8, 8, 8, 8] total 38 [2022-11-22 01:58:02,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564611729] [2022-11-22 01:58:02,411 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:58:02,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-22 01:58:02,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:58:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-22 01:58:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1356, Unknown=5, NotChecked=0, Total=1560 [2022-11-22 01:58:02,413 INFO L87 Difference]: Start difference. First operand 2737 states and 10861 transitions. Second operand has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:58:14,853 WARN L233 SmtUtils]: Spent 10.56s on a formula simplification. DAG size of input: 72 DAG size of output: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:58:31,100 WARN L233 SmtUtils]: Spent 15.35s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:58:37,777 WARN L233 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:59:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 01:59:16,315 INFO L93 Difference]: Finished difference Result 16437 states and 71080 transitions. [2022-11-22 01:59:16,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-22 01:59:16,317 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 01:59:16,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 01:59:16,396 INFO L225 Difference]: With dead ends: 16437 [2022-11-22 01:59:16,396 INFO L226 Difference]: Without dead ends: 16437 [2022-11-22 01:59:16,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 95.0s TimeCoverageRelationStatistics Valid=1877, Invalid=7238, Unknown=5, NotChecked=0, Total=9120 [2022-11-22 01:59:16,399 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 3272 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 2986 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3272 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 2986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-11-22 01:59:16,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3272 Valid, 286 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 2986 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2022-11-22 01:59:16,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16437 states. [2022-11-22 01:59:16,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16437 to 3787. [2022-11-22 01:59:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3749 states have (on average 4.836489730594825) internal successors, (18132), 3786 states have internal predecessors, (18132), 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) [2022-11-22 01:59:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 18132 transitions. [2022-11-22 01:59:16,727 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 18132 transitions. Word has length 19 [2022-11-22 01:59:16,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 01:59:16,727 INFO L495 AbstractCegarLoop]: Abstraction has 3787 states and 18132 transitions. [2022-11-22 01:59:16,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.0) internal successors, (78), 39 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 01:59:16,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 18132 transitions. [2022-11-22 01:59:16,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 01:59:16,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 01:59:16,728 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 01:59:16,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:16,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:17,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-22 01:59:17,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:17,345 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 01:59:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 01:59:17,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1849998990, now seen corresponding path program 1 times [2022-11-22 01:59:17,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 01:59:17,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028827604] [2022-11-22 01:59:17,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:17,346 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 01:59:17,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 01:59:17,347 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 01:59:17,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-22 01:59:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-22 01:59:17,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:17,923 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-22 01:59:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:18,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:59:18,037 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:59:18,037 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:59:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:59:18,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:19,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 103 treesize of output 95 [2022-11-22 01:59:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:59:20,029 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 01:59:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028827604] [2022-11-22 01:59:20,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028827604] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [606645113] [2022-11-22 01:59:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:20,030 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 01:59:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 01:59:20,031 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 01:59:20,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-22 01:59:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:21,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 01:59:21,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:22,364 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:59:22,377 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-22 01:59:22,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 01:59:22,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 01:59:22,570 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 01:59:22,571 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 01:59:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:59:23,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:23,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 01:59:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:59:24,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [606645113] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:24,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195802414] [2022-11-22 01:59:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 01:59:24,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 01:59:24,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 01:59:24,243 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 01:59:24,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-11-22 01:59:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 01:59:24,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 01:59:24,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 01:59:24,720 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 01:59:24,903 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 01:59:24,904 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 01:59:25,767 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:59:25,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 01:59:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 01:59:29,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195802414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 01:59:29,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 01:59:29,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 38 [2022-11-22 01:59:29,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325110055] [2022-11-22 01:59:29,167 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 01:59:29,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-22 01:59:29,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 01:59:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-22 01:59:29,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1317, Unknown=0, NotChecked=0, Total=1482 [2022-11-22 01:59:29,169 INFO L87 Difference]: Start difference. First operand 3787 states and 18132 transitions. Second operand has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 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) [2022-11-22 01:59:40,614 WARN L233 SmtUtils]: Spent 6.69s on a formula simplification. DAG size of input: 74 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 01:59:48,418 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 73 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:00:07,519 WARN L233 SmtUtils]: Spent 8.70s on a formula simplification. DAG size of input: 84 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:00:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:00:32,552 INFO L93 Difference]: Finished difference Result 19822 states and 91745 transitions. [2022-11-22 02:00:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-22 02:00:32,553 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 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 19 [2022-11-22 02:00:32,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:00:32,708 INFO L225 Difference]: With dead ends: 19822 [2022-11-22 02:00:32,708 INFO L226 Difference]: Without dead ends: 19822 [2022-11-22 02:00:32,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 73 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 54.3s TimeCoverageRelationStatistics Valid=1756, Invalid=8144, Unknown=0, NotChecked=0, Total=9900 [2022-11-22 02:00:32,710 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3929 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 3019 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3929 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 3336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 3019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2022-11-22 02:00:32,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3929 Valid, 302 Invalid, 3336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 3019 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2022-11-22 02:00:32,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19822 states. [2022-11-22 02:00:32,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19822 to 5316. [2022-11-22 02:00:32,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5278 states have (on average 4.963812050018946) internal successors, (26199), 5315 states have internal predecessors, (26199), 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) [2022-11-22 02:00:33,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 26199 transitions. [2022-11-22 02:00:33,041 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 26199 transitions. Word has length 19 [2022-11-22 02:00:33,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:00:33,041 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 26199 transitions. [2022-11-22 02:00:33,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 states have internal predecessors, (65), 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) [2022-11-22 02:00:33,042 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 26199 transitions. [2022-11-22 02:00:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 02:00:33,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:00:33,043 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:00:33,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:33,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:33,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-22 02:00:33,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:00:33,653 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 02:00:33,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:00:33,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1849998992, now seen corresponding path program 1 times [2022-11-22 02:00:33,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:00:33,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796860287] [2022-11-22 02:00:33,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:33,655 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:00:33,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:00:33,657 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:00:33,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2022-11-22 02:00:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-22 02:00:34,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:00:34,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:34,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 35 treesize of output 29 [2022-11-22 02:00:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:00:35,335 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:00:35,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796860287] [2022-11-22 02:00:35,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796860287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:35,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1887680012] [2022-11-22 02:00:35,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:35,335 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:00:35,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:00:35,337 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:00:35,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (69)] Waiting until timeout for monitored process [2022-11-22 02:00:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:36,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:00:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:36,480 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 02:00:36,969 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:00:36,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:38,421 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:00:38,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1887680012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:38,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585167041] [2022-11-22 02:00:38,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:00:38,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:00:38,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:00:38,422 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:00:38,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-11-22 02:00:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:00:38,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-22 02:00:38,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:00:38,916 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 02:00:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:00:39,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:00:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-22 02:00:41,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585167041] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:00:41,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:00:41,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 5, 5] total 42 [2022-11-22 02:00:41,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220184171] [2022-11-22 02:00:41,307 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:00:41,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-22 02:00:41,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:00:41,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-22 02:00:41,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2022-11-22 02:00:41,310 INFO L87 Difference]: Start difference. First operand 5316 states and 26199 transitions. Second operand has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:01:13,238 INFO L93 Difference]: Finished difference Result 20872 states and 89924 transitions. [2022-11-22 02:01:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-22 02:01:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 02:01:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:01:13,336 INFO L225 Difference]: With dead ends: 20872 [2022-11-22 02:01:13,336 INFO L226 Difference]: Without dead ends: 20872 [2022-11-22 02:01:13,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=2256, Invalid=9734, Unknown=0, NotChecked=0, Total=11990 [2022-11-22 02:01:13,338 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 4612 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 3594 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4612 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 3908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 3594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2022-11-22 02:01:13,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4612 Valid, 355 Invalid, 3908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 3594 Invalid, 0 Unknown, 0 Unchecked, 12.7s Time] [2022-11-22 02:01:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20872 states. [2022-11-22 02:01:13,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20872 to 5316. [2022-11-22 02:01:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5316 states, 5278 states have (on average 4.565934065934066) internal successors, (24099), 5315 states have internal predecessors, (24099), 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) [2022-11-22 02:01:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5316 states to 5316 states and 24099 transitions. [2022-11-22 02:01:13,756 INFO L78 Accepts]: Start accepts. Automaton has 5316 states and 24099 transitions. Word has length 19 [2022-11-22 02:01:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:01:13,756 INFO L495 AbstractCegarLoop]: Abstraction has 5316 states and 24099 transitions. [2022-11-22 02:01:13,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 43 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 5316 states and 24099 transitions. [2022-11-22 02:01:13,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-22 02:01:13,757 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:01:13,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:01:13,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (68)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:13,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (69)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:14,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-11-22 02:01:14,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:14,358 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 02:01:14,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:01:14,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1533874818, now seen corresponding path program 1 times [2022-11-22 02:01:14,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:01:14,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [112694843] [2022-11-22 02:01:14,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:14,359 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:01:14,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:01:14,360 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:01:14,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-22 02:01:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:14,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:01:14,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:14,848 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 02:01:15,005 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 02:01:15,006 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 23 [2022-11-22 02:01:15,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:01:15,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:17,092 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:01:17,092 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:01:17,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [112694843] [2022-11-22 02:01:17,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [112694843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:17,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [90035029] [2022-11-22 02:01:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:17,093 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:01:17,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:01:17,094 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:01:17,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (72)] Waiting until timeout for monitored process [2022-11-22 02:01:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:18,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-22 02:01:18,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:19,200 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 02:01:19,216 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-22 02:01:19,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:01:19,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-22 02:01:19,441 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-22 02:01:19,441 INFO L350 Elim1Store]: Elim1 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 13 treesize of output 13 [2022-11-22 02:01:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:01:20,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:21,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-22 02:01:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:01:21,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [90035029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:21,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766181464] [2022-11-22 02:01:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-22 02:01:21,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:01:21,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:01:21,987 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:01:21,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-11-22 02:01:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-22 02:01:22,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-22 02:01:22,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:01:22,507 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 02:01:22,733 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 02:01:22,733 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2022-11-22 02:01:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:01:23,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:01:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-22 02:01:27,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766181464] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:01:27,077 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:01:27,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 39 [2022-11-22 02:01:27,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930120444] [2022-11-22 02:01:27,078 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:01:27,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-22 02:01:27,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:01:27,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-22 02:01:27,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-11-22 02:01:27,079 INFO L87 Difference]: Start difference. First operand 5316 states and 24099 transitions. Second operand has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:01:49,082 WARN L233 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 79 DAG size of output: 52 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:02:07,159 WARN L233 SmtUtils]: Spent 8.74s on a formula simplification. DAG size of input: 88 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-22 02:02:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:02:26,103 INFO L93 Difference]: Finished difference Result 8008 states and 34561 transitions. [2022-11-22 02:02:26,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-22 02:02:26,105 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-22 02:02:26,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:02:26,131 INFO L225 Difference]: With dead ends: 8008 [2022-11-22 02:02:26,131 INFO L226 Difference]: Without dead ends: 8008 [2022-11-22 02:02:26,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1426 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=1247, Invalid=5559, Unknown=0, NotChecked=0, Total=6806 [2022-11-22 02:02:26,132 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1648 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:02:26,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1648 Valid, 237 Invalid, 2594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 2424 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2022-11-22 02:02:26,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8008 states. [2022-11-22 02:02:26,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8008 to 6736. [2022-11-22 02:02:26,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6736 states, 6698 states have (on average 4.499701403404001) internal successors, (30139), 6735 states have internal predecessors, (30139), 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) [2022-11-22 02:02:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6736 states to 6736 states and 30139 transitions. [2022-11-22 02:02:26,267 INFO L78 Accepts]: Start accepts. Automaton has 6736 states and 30139 transitions. Word has length 19 [2022-11-22 02:02:26,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:02:26,268 INFO L495 AbstractCegarLoop]: Abstraction has 6736 states and 30139 transitions. [2022-11-22 02:02:26,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.6923076923076923) internal successors, (66), 40 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-22 02:02:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 6736 states and 30139 transitions. [2022-11-22 02:02:26,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 02:02:26,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:02:26,314 INFO L195 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1] [2022-11-22 02:02:26,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-11-22 02:02:26,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-22 02:02:26,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (72)] Forceful destruction successful, exit code 0 [2022-11-22 02:02:26,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:02:26,915 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 02:02:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:02:26,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1610858991, now seen corresponding path program 3 times [2022-11-22 02:02:26,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:02:26,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084615389] [2022-11-22 02:02:26,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:02:26,916 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:02:26,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:02:26,917 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:02:26,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-22 02:02:27,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:02:27,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:02:27,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:02:27,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:02:27,586 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:02:27,586 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:02:27,870 INFO L321 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2022-11-22 02:02:27,870 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 21 [2022-11-22 02:02:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:02:28,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:02:29,515 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:02:29,515 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:02:29,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084615389] [2022-11-22 02:02:29,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084615389] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:02:29,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525183297] [2022-11-22 02:02:29,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:02:29,516 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:02:29,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:02:29,517 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:02:29,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-22 02:02:31,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:02:31,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:02:31,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-22 02:02:31,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:02:31,533 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 02:02:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:02:31,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:02:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:02:32,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525183297] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:02:32,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231327141] [2022-11-22 02:02:32,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-22 02:02:32,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-22 02:02:32,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 [2022-11-22 02:02:32,316 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-22 02:02:32,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-11-22 02:02:36,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-22 02:02:36,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:02:36,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-22 02:02:36,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:02:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:02:36,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:02:38,261 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-22 02:02:38,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231327141] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:02:38,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2022-11-22 02:02:38,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 45 [2022-11-22 02:02:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717002503] [2022-11-22 02:02:38,262 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2022-11-22 02:02:38,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-22 02:02:38,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:02:38,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-22 02:02:38,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1798, Unknown=0, NotChecked=0, Total=2070 [2022-11-22 02:02:38,263 INFO L87 Difference]: Start difference. First operand 6736 states and 30139 transitions. Second operand has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 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) [2022-11-22 02:03:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:03:06,010 INFO L93 Difference]: Finished difference Result 23857 states and 107499 transitions. [2022-11-22 02:03:06,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-22 02:03:06,012 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 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 20 [2022-11-22 02:03:06,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:03:06,111 INFO L225 Difference]: With dead ends: 23857 [2022-11-22 02:03:06,111 INFO L226 Difference]: Without dead ends: 23857 [2022-11-22 02:03:06,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1033, Invalid=4079, Unknown=0, NotChecked=0, Total=5112 [2022-11-22 02:03:06,112 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2533 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 3318 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2533 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 3756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 3318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2022-11-22 02:03:06,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2533 Valid, 291 Invalid, 3756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 3318 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time] [2022-11-22 02:03:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23857 states. [2022-11-22 02:03:06,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23857 to 6751. [2022-11-22 02:03:06,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6751 states, 6713 states have (on average 4.492179353493222) internal successors, (30156), 6750 states have internal predecessors, (30156), 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) [2022-11-22 02:03:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6751 states to 6751 states and 30156 transitions. [2022-11-22 02:03:06,546 INFO L78 Accepts]: Start accepts. Automaton has 6751 states and 30156 transitions. Word has length 20 [2022-11-22 02:03:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:03:06,547 INFO L495 AbstractCegarLoop]: Abstraction has 6751 states and 30156 transitions. [2022-11-22 02:03:06,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 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) [2022-11-22 02:03:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 6751 states and 30156 transitions. [2022-11-22 02:03:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-22 02:03:06,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:03:06,548 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-22 02:03:06,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-22 02:03:06,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-11-22 02:03:06,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-22 02:03:07,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/z3 -smt2 -in SMTLIB2_COMPLIANT=true,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt [2022-11-22 02:03:07,149 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 02:03:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:03:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1515398908, now seen corresponding path program 2 times [2022-11-22 02:03:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:03:07,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1002260357] [2022-11-22 02:03:07,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-22 02:03:07,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:03:07,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:03:07,151 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:03:07,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-22 02:03:07,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-22 02:03:07,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:03:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-22 02:03:07,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:03:07,701 INFO L321 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2022-11-22 02:03:07,701 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 17 treesize of output 44 [2022-11-22 02:03:07,868 INFO L321 Elim1Store]: treesize reduction 84, result has 33.9 percent of original size [2022-11-22 02:03:07,869 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 15 treesize of output 50 [2022-11-22 02:03:07,986 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-22 02:03:07,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-11-22 02:03:08,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-22 02:03:08,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:03:08,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-22 02:03:08,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2022-11-22 02:03:08,257 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-22 02:03:08,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-22 02:03:08,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-22 02:03:08,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-22 02:03:08,808 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:03:08,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1002260357] [2022-11-22 02:03:08,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1002260357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-22 02:03:08,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-22 02:03:08,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-22 02:03:08,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023360870] [2022-11-22 02:03:08,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-22 02:03:08,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-22 02:03:08,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-22 02:03:08,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-22 02:03:08,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-22 02:03:08,810 INFO L87 Difference]: Start difference. First operand 6751 states and 30156 transitions. Second operand has 5 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) [2022-11-22 02:03:09,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-22 02:03:09,444 INFO L93 Difference]: Finished difference Result 6145 states and 26477 transitions. [2022-11-22 02:03:09,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-22 02:03:09,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 20 [2022-11-22 02:03:09,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-22 02:03:09,462 INFO L225 Difference]: With dead ends: 6145 [2022-11-22 02:03:09,462 INFO L226 Difference]: Without dead ends: 6145 [2022-11-22 02:03:09,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-22 02:03:09,463 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-22 02:03:09,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-22 02:03:09,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6145 states. [2022-11-22 02:03:09,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6145 to 5597. [2022-11-22 02:03:09,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5597 states, 5568 states have (on average 4.339798850574713) internal successors, (24164), 5596 states have internal predecessors, (24164), 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) [2022-11-22 02:03:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5597 states to 5597 states and 24164 transitions. [2022-11-22 02:03:09,612 INFO L78 Accepts]: Start accepts. Automaton has 5597 states and 24164 transitions. Word has length 20 [2022-11-22 02:03:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-22 02:03:09,612 INFO L495 AbstractCegarLoop]: Abstraction has 5597 states and 24164 transitions. [2022-11-22 02:03:09,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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) [2022-11-22 02:03:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 5597 states and 24164 transitions. [2022-11-22 02:03:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-22 02:03:09,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-22 02:03:09,614 INFO L195 NwaCegarLoop]: trace histogram [13, 5, 1, 1, 1] [2022-11-22 02:03:09,628 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-22 02:03:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:03:09,828 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-22 02:03:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-22 02:03:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash -428953760, now seen corresponding path program 4 times [2022-11-22 02:03:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-22 02:03:09,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589943085] [2022-11-22 02:03:09,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:03:09,829 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-22 02:03:09,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat [2022-11-22 02:03:09,830 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-22 02:03:09,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (78)] Waiting until timeout for monitored process [2022-11-22 02:03:10,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:03:10,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:03:10,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-22 02:03:10,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-22 02:03:10,403 INFO L350 Elim1Store]: Elim1 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 8 treesize of output 7 [2022-11-22 02:03:10,965 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 48 proven. 43 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-22 02:03:10,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-22 02:03:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-22 02:03:16,562 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-22 02:03:16,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589943085] [2022-11-22 02:03:16,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589943085] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-22 02:03:16,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1880094671] [2022-11-22 02:03:16,562 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-22 02:03:16,562 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-22 02:03:16,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 [2022-11-22 02:03:16,563 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-22 02:03:16,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3771fc8-4407-4d5e-8a5c-52f87076e02a/bin/utaipan-g80aRyZoba/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2022-11-22 02:03:17,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-22 02:03:17,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-22 02:03:17,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-22 02:03:17,256 INFO L286 TraceCheckSpWp]: Computing forward predicates...